1. Control Node and Managed Nodes

Deep Dive and Submission Example for Control Node and Managed Nodes

A complete treatment of Control Node and Managed Nodes contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Control Node and Managed Nodes

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Control Node and Managed Nodes

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Control Node and Managed Nodes is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Control Node and Managed Nodes

This section is not just a definition. In the workshop, Control Node and Managed Nodes is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Control Node and Managed Nodes

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Control Node and Managed Nodes

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Control Node and Managed Nodes

Operations Note for Control Node and Managed Nodes

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Control Node and Managed Nodes is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

2. Agentless Push Model

Deep Dive and Submission Example for Agentless Push Model

A complete treatment of Agentless Push Model contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Agentless Push Model

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Agentless Push Model

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Agentless Push Model is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Agentless Push Model

This section is not just a definition. In the workshop, Agentless Push Model is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Agentless Push Model

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Agentless Push Model

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Agentless Push Model

Operations Note for Agentless Push Model

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Agentless Push Model is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

3. Inventory, Groups, and Patterns

Deep Dive and Submission Example for Inventory, Groups, and Patterns

A complete treatment of Inventory, Groups, and Patterns contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Inventory, Groups, and Patterns

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Inventory, Groups, and Patterns

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Inventory, Groups, and Patterns is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Inventory, Groups, and Patterns

This section is not just a definition. In the workshop, Inventory, Groups, and Patterns is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Inventory, Groups, and Patterns

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Inventory, Groups, and Patterns

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Inventory, Groups, and Patterns

Operations Note for Inventory, Groups, and Patterns

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Inventory, Groups, and Patterns is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

4. Modules, Tasks, Plays, and Playbooks

Deep Dive and Submission Example for Modules, Tasks, Plays, and Playbooks

A complete treatment of Modules, Tasks, Plays, and Playbooks contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Modules, Tasks, Plays, and Playbooks

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Modules, Tasks, Plays, and Playbooks

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Modules, Tasks, Plays, and Playbooks is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Modules, Tasks, Plays, and Playbooks

This section is not just a definition. In the workshop, Modules, Tasks, Plays, and Playbooks is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Modules, Tasks, Plays, and Playbooks

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Modules, Tasks, Plays, and Playbooks

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Modules, Tasks, Plays, and Playbooks

Operations Note for Modules, Tasks, Plays, and Playbooks

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Modules, Tasks, Plays, and Playbooks is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

5. Idempotence

Deep Dive and Submission Example for Idempotence

A complete treatment of Idempotence contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Idempotence

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Idempotence

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Idempotence is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Idempotence

This section is not just a definition. In the workshop, Idempotence is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Idempotence

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Idempotence

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Idempotence

Operations Note for Idempotence

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Idempotence is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

6. Variables and Facts

Deep Dive and Submission Example for Variables and Facts

A complete treatment of Variables and Facts contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Variables and Facts

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Variables and Facts

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Variables and Facts is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Variables and Facts

This section is not just a definition. In the workshop, Variables and Facts is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Variables and Facts

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Variables and Facts

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Variables and Facts

Operations Note for Variables and Facts

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Variables and Facts is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

7. Templates with Jinja2

Deep Dive and Submission Example for Templates with Jinja2

A complete treatment of Templates with Jinja2 contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Templates with Jinja2

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Templates with Jinja2

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Templates with Jinja2 is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Templates with Jinja2

This section is not just a definition. In the workshop, Templates with Jinja2 is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Templates with Jinja2

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Templates with Jinja2

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Templates with Jinja2

Operations Note for Templates with Jinja2

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Templates with Jinja2 is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

8. Handlers and Notifications

Deep Dive and Submission Example for Handlers and Notifications

A complete treatment of Handlers and Notifications contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Handlers and Notifications

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Handlers and Notifications

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Handlers and Notifications is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Handlers and Notifications

This section is not just a definition. In the workshop, Handlers and Notifications is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Handlers and Notifications

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Handlers and Notifications

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Handlers and Notifications

Operations Note for Handlers and Notifications

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Handlers and Notifications is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

9. Roles

Deep Dive and Submission Example for Roles

A complete treatment of Roles contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Roles

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Roles

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Roles is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Roles

This section is not just a definition. In the workshop, Roles is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Roles

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Roles

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Roles

Operations Note for Roles

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Roles is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

10. Collections

Deep Dive and Submission Example for Collections

A complete treatment of Collections contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Collections

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Collections

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Collections is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Collections

This section is not just a definition. In the workshop, Collections is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Collections

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Collections

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Collections

Operations Note for Collections

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Collections is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

11. Vault

Deep Dive and Submission Example for Vault

A complete treatment of Vault contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Vault

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Vault

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Vault is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Vault

This section is not just a definition. In the workshop, Vault is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Vault

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Vault

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Vault

Operations Note for Vault

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Vault is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

12. Check Mode and Diff Mode

Deep Dive and Submission Example for Check Mode and Diff Mode

A complete treatment of Check Mode and Diff Mode contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Check Mode and Diff Mode

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Check Mode and Diff Mode

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Check Mode and Diff Mode is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Check Mode and Diff Mode

This section is not just a definition. In the workshop, Check Mode and Diff Mode is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Check Mode and Diff Mode

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Check Mode and Diff Mode

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Check Mode and Diff Mode

Operations Note for Check Mode and Diff Mode

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Check Mode and Diff Mode is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

13. Failure States

Deep Dive and Submission Example for Failure States

A complete treatment of Failure States contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Failure States

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Failure States

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Failure States is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Failure States

This section is not just a definition. In the workshop, Failure States is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Failure States

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Failure States

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Failure States

Operations Note for Failure States

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Failure States is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

14. Tags

Deep Dive and Submission Example for Tags

A complete treatment of Tags contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Tags

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Tags

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Tags is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Tags

This section is not just a definition. In the workshop, Tags is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Tags

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Tags

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Tags

Operations Note for Tags

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Tags is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

15. Delegation and Orchestration

Deep Dive and Submission Example for Delegation and Orchestration

A complete treatment of Delegation and Orchestration contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Delegation and Orchestration

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Delegation and Orchestration

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Delegation and Orchestration is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Delegation and Orchestration

This section is not just a definition. In the workshop, Delegation and Orchestration is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Delegation and Orchestration

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Delegation and Orchestration

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Delegation and Orchestration

Operations Note for Delegation and Orchestration

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Delegation and Orchestration is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

16. Ansible Boundaries

Deep Dive and Submission Example for Ansible Boundaries

A complete treatment of Ansible Boundaries contains both a technical artifact and a short domain explanation. The artifact can be an inventory, a playbook, a role, a template, a Vault file with dummy values, a CI configuration, or an evidence file. The explanation states why this path was chosen and which alternative was deliberately not used.

Minimal Artifacts for Ansible Boundaries

submission/
  inventory/hosts.yml
  playbooks/site.yml
  evidence.md
  cleanup.md

For roles or collections, the structure expands:

submission/
  ansible.cfg
  collections/requirements.yml
  inventory/hosts.yml
  roles/<role>/defaults/main.yml
  roles/<role>/tasks/main.yml
  roles/<role>/handlers/main.yml
  playbooks/site.yml
  evidence.md

Grading Expectation for Ansible Boundaries

A reviewable solution must be understandable to people who did not run it themselves. Screenshots or uncommented terminal output are not enough. Good evidence states context, command, relevant output, and assessment. If a module behaves differently in check mode, that limitation is explicitly documented.

Transfer to Real Teams

In a team context, Ansible Boundaries is connected to code review, branch rules, CI, role ownership, release notes, and operational approval. Production-like usage also documents ownership, maintenance window, monitoring, alerting, and rollback criteria.

Practical Relevance of Ansible Boundaries

This section is not just a definition. In the workshop, Ansible Boundaries is always validated through a concrete flow: inspect inventory, prove target hosts, check the playbook, simulate the change, run the change, evaluate a second run, and document cleanup. This shows whether Ansible really models desired state or merely executes a command successfully once.

Example Flow for Ansible Boundaries

ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --list-hosts
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff
ansible-playbook -i inventory/hosts.yml playbooks/site.yml
ansible-playbook -i inventory/hosts.yml playbooks/site.yml

The flow is intentionally complete. In real teams, some steps are automated but not skipped. CI can run syntax checks and linting; the domain review of scope, privileges, secret flows, and rollout risk remains a human engineering task.

Review Criteria for Ansible Boundaries

• Inventory and patterns are narrower than all unless a reason is documented.
• Modules from ansible.builtin or reviewed collections are preferred.
• Shell or command tasks include changed_when, failed_when, or a clear reason.
• Variables are placed predictably and do not override each other surprisingly.
• Secrets do not appear in plaintext, diffs, debug tasks, or CI logs.
• The playbook can run repeatedly without unnecessary changes.
• Cleanup, fix-forward, or controlled acceptance of the target state is documented.

Common Failure Modes for Ansible Boundaries

Operations Note for Ansible Boundaries

For production-like usage, the lab must become a runbook. The runbook states target systems, owners, prerequisites, stop criteria, expected duration, validation, monitoring, and cleanup. Without those details, a playbook is executable but not operationally mature.

Ansible Boundaries is a practical building block of the Ansible workshop. The desired state must be described, executed against a controlled scope, and validated before and after the run. A solid Ansible workflow answers four questions: which hosts are targeted, which change is performed, which privileges are required, and how success is measured.

Typical commands:

ansible --version
ansible-config dump --only-changed
ansible-inventory -i inventory/hosts.yml --graph
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --syntax-check
ansible-playbook -i inventory/hosts.yml playbooks/site.yml --check --diff

For reviews, a playbook is ready only when it proves its target scope, exposes its data sources, protects sensitive values, describes failure paths, and remains stable after a second run. If a module does not fully support check mode or diff mode, that limitation belongs in the runbook.

Common mistakes are broad patterns such as all, unclear variable sources, shell workarounds without idempotence, secrets in debug output, missing rollback notes, and missing separation between lab and production inventory.

Sources and Further References

• Official Ansible Community Documentation: https://docs.ansible.com/
• Ansible Getting Started: https://docs.ansible.com/projects/ansible/latest/getting_started/index.html
• Inventory Guide: https://docs.ansible.com/projects/ansible/latest/inventory_guide/index.html
• Playbook Guide: https://docs.ansible.com/projects/ansible/latest/playbook_guide/index.html
• Module Index: https://docs.ansible.com/ansible/latest/collections/ansible/builtin/index.html
• Vault Guide: https://docs.ansible.com/projects/ansible/latest/vault_guide/index.html
• Ansible Lint: https://ansible.readthedocs.io/projects/lint/
• Molecule: https://ansible.readthedocs.io/projects/molecule/
• AWX: https://github.com/ansible/awx
• Red Hat Certifications: https://www.redhat.com/en/services/certifications