EX294 Manage task execution and roles Practice Question
A team develops a custom Ansible role 'webserver' that depends on another role 'common'. They want to ensure that when 'webserver' is used, 'common' is automatically installed from the same Galaxy server. Which approach should they use?
⚠ Common exam trap
It's easy for candidates to confuse role dependencies (declared in `meta/main.yml`) with playbook-level role ordering or external requirements files, leading them to choose options that manage execution order or manual installation instead of automatic dependency resolution.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a dependencies: ['common'] to the role's meta/main.yml file.
Ansible roles can declare dependencies in the `meta/main.yml` file using the `dependencies` key. When the 'webserver' role is installed via `ansible-galaxy install`, Ansible automatically resolves and installs all listed dependencies from the same Galaxy server, ensuring 'common' is present without manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add a requirements.yml file in the role's root directory specifying common.
Why it's wrong here
requirements.yml is not automatically processed when the role is used; it must be explicitly installed.
- ✓
Add a dependencies: ['common'] to the role's meta/main.yml file.
Why this is correct
Correct: Role dependencies in meta/main.yml are automatically installed.
- ✗
Use ansible-galaxy install webserver --with-dependencies to install common separately.
Why it's wrong here
This works but requires the user to remember to use --with-dependencies; not automatic.
- ✗
Include the 'common' role in the playbook before 'webserver'.
Why it's wrong here
This does not automate installation; common must already be present on the control node.
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