RedHat EX374 問題集

質問 1：
Create an advanced inventory that includes both static and dynamic sources.
正解：
# inventory_combined.yml plugin: constructed sources:
- static_inventory.yml
- dynamic_inventory.py
Explanation:
Combining static and dynamic inventories ensures flexibility, allowing static definitions while dynamically fetching additional hosts.

質問 2：
Implement a loop using a dictionary and display each key-value pair.
正解：
- name: Loop through dictionary hosts: localhost
vars:
services: nginx: running mysql: stopped
tasks:
- name: Display service statuses debug:
msg: "Service {{ item.key }} is {{ item.value }}" with_dict: "{{ services }}"
Explanation:
The with_dict loop iterates over dictionary key-value pairs, allowing operations on each pair individually.

質問 3：
Create an inventory in Automation Controller using a dynamic inventory script.
正解：
1. Go to Inventories and add: o Name: Dynamic Inventory
o Source: Custom Script
o Script: Upload the inventory script (e.g., idm_inventory.py).
2. Sync the inventory.
Explanation:
Dynamic inventory scripts allow fetching host information from external systems like databases or cloud platforms.

質問 4：
Create a requirements.yml file to define multiple collections for installation.
正解：
# requirements.yml
collections:
- name: community.general version: 3.0.0
- name: ansible.posix version: 1.3.0
ansible-galaxy collection install -r requirements.yml
Explanation:
The requirements.yml file defines dependencies, allowing batch installation of multiple collections in a single command.

質問 5：
Retrieve the hostname of a managed node using the ansible_hostname fact and display it.
正解：
- name: Get hostname hosts: all
tasks:
- name: Display hostname debug:
var: ansible_hostname
Explanation:
Using the ansible_hostname fact allows playbooks to dynamically adapt to each managed node's hostname.

質問 6：
Set up a CI/CD pipeline to build and upload an EE.
正解：
# .github/workflows/ci.yml name: EE CI/CD
on: [push]
jobs:
build-and-push:
runs-on: ubuntu-latest
steps:
- name: Checkout code uses: actions/checkout@v3
- name: Build EE
run: ansible-builder build --tag my_execution_env:1.0
- name: Push to registry
run: podman push my_execution_env:1.0 registry.example.com/my_execution_env:1.0
Explanation:
This CI/CD pipeline automates the process of building and pushing EEs to a container registry.

質問 7：
You need to revert the last commit on the main branch without removing the changes locally. Revert the commit.
正解：
git revert HEAD
Explanation:
Reverting creates a new commit that undoes the changes made by the specified commit, maintaining the repository's integrity.

質問 8：
Extract the hostname from a URL using the regex_search filter.
正解：
- name: Extract hostname hosts: localhost
vars:
url: "http://example.com/page" tasks:
- name: Get hostname debug:
var: "{{ url | regex_search('http://([^/]+)') }}"
Explanation:
The regex_search filter extracts substrings matching a regular expression, facilitating parsing and data extraction.

質問 9：
Merge the feature-update branch into the main branch to integrate the changes.
正解：
git checkout main
git merge feature-update
Explanation:
Switching to the target branch and merging ensures that changes from the source branch are integrated systematically.