RedHat EX374 問題集

質問 1：
Use delegate_facts to control where facts are gathered during delegation.
正解：
- name: Control fact delegation hosts: web1
tasks:
- name: Gather facts on db1 setup:
delegate_to: db1
delegate_facts: true
Explanation:
The delegate_facts option determines if gathered facts are stored for the delegated host (db1) or the current host (web1).

質問 2：
Write a playbook to display all registered variables from previous tasks.
正解：
- name: Display variables hosts: all
tasks:
- name: Run command
command: echo "Hello"
register: command_output
- debug:
var: command_output
Explanation:
The register directive stores task outputs in variables, making them accessible for subsequent tasks.

質問 3：
Write a playbook to use ignore_errors to skip a task failure and continue execution.
正解：
- name: Continue on failure hosts: all
tasks:
- name: Intentional failure
command: exit 1
ignore_errors: yes
- name: Continue execution debug:
msg: "Task after failure"
Explanation:
The ignore_errors: yes directive allows the playbook to continue running even if a task fails, ensuring subsequent tasks are executed.

質問 4：
Pause execution between tasks to simulate manual intervention.
正解：
- name: Pause example hosts: all
tasks:
- name: Pause for 10 seconds pause:
seconds: 10
Explanation:
The pause module allows for intentional delays between tasks, simulating manual checks or staggered operations.

質問 5：
Validate the EE configuration using Ansible Builder.
正解：
ansible-builder validate --tag my_execution_env:1.0
Explanation:
The validate command checks the EE's configuration for errors, ensuring compatibility with Ansible's execution requirements.

質問 6：
Convert a CSV file into a dictionary using the lookup plugin.
正解：
- name: Convert CSV to dictionary hosts: localhost
tasks:
- name: Read CSV set_fact:
csv_data: "{{ lookup('csvfile', '/tmp/data.csv', delimiter=',') }}"
- debug:
var: csv_data
Explanation:
The csvfile lookup plugin converts CSV data into dictionaries, integrating tabular data into playbooks.

質問 7：
Execute a task on a remote host (db1) and use its output in a task on the current host.
正解：
- name: Use delegated output hosts: web1
tasks:
- name: Get uptime from db1
command: uptime
delegate_to: db1
register: db1_uptime
- name: Display db1 uptime on web1 debug:
msg: "Uptime of db1: {{ db1_uptime.stdout }}"
Explanation:
Storing the output of a delegated task in a variable allows its use in subsequent tasks, bridging operations across hosts.

質問 8：
Set up multiple environment inventories (dev and prod) with shared group variables.
正解：
mkdir -p dev prod
echo "[web_servers]" > dev/inventory.ini
echo "web1 ansible_host=192.168.1.10" >> dev/inventory.ini echo "[web_servers]" > prod/inventory.ini
echo "web1 ansible_host=10.0.0.1" >> prod/inventory.ini
Explanation:
Separate inventories for environments ensure isolation and simplify management of environment-specific configurations.

質問 9：
Inspect the file system of the EE container image.
正解：
podman run --rm -it my_execution_env:1.0 sh
Explanation:
Starting an interactive shell inside the EE allows inspection of its file system, aiding in troubleshooting or
customization.