DO447管理清单--章节实验

DO447管理清单–章节实验

RHCSA专栏：戏说 RHCSA 认证

RHCE专栏：戏说 RHCE 认证

此文章（第二章 管理清单–章节实验 ）收录在RHCA专栏：RHCA 回忆录

[student@workstation ~]$ lab inventory-review start

拉取实验代码

[student@workstation ~]$ cd git-repos/
[student@workstation git-repos]$ git clone http://git.lab.example.com:8081/git/inventory-review.git
Cloning into 'inventory-review'...
remote: Enumerating objects: 56, done.
remote: Counting objects: 100% (56/56), done.
remote: Compressing objects: 100% (42/42), done.
remote: Total 56 (delta 5), reused 0 (delta 0)
Unpacking objects: 100% (56/56), done.

[student@workstation git-repos]$ cd inventory-review

运行剧本并验证

[student@workstation inventory-review]$ cat inventory 
[lb_servers]
servera.lab.example.com

[web_servers]

[web_servers:children]
a_web_servers
b_web_servers


# Group "A" of Web Servers
[a_web_servers]
serverb.lab.example.com


# Group "B" of Web Servers
[b_web_servers]
serverc.lab.example.com

[student@workstation inventory-review]$ ansible-playbook site.yml
[student@workstation inventory-review]$ curl http://servera
Hello from serverb.lab.example.com. (version v1.1)
[student@workstation inventory-review]$ curl http://servera
Hello from serverc.lab.example.com. (version v1.1)

按要求创建主机组变量

[student@workstation inventory-review]$ mkdir -pv group_vars/{a,b}_web_servers
mkdir: created directory 'group_vars/a_web_servers'
mkdir: created directory 'group_vars/b_web_servers'

[student@workstation inventory-review]$ echo "webapp_version: v1.1a" > group_vars/a_web_servers/webapp.yml
[student@workstation inventory-review]$ echo "webapp_version: v1.1b" > group_vars/b_web_servers/webapp.yml

运行剧本并验证

[student@workstation inventory-review]$ ansible-playbook deploy_webapp.yml
[student@workstation inventory-review]$ curl http://servera
Hello from serverb.lab.example.com. (version v1.1a)
[student@workstation inventory-review]$ curl http://servera
Hello from serverc.lab.example.com. (version v1.1b)

提交修改到工作区

[student@workstation inventory-review]$ git status
On branch master
Your branch is up to date with 'origin/master'.

Untracked files:
  (use "git add ..." to include in what will be committed)

	group_vars/a_web_servers/
	group_vars/b_web_servers/

nothing added to commit but untracked files present (use "git add" to track)

[student@workstation inventory-review]$ git add group_vars/{a,b}_web_servers
[student@workstation inventory-review]$ git status
On branch master
Your branch is up to date with 'origin/master'.

Changes to be committed:
  (use "git reset HEAD ..." to unstage)

	new file:   group_vars/a_web_servers/webapp.yml
	new file:   group_vars/b_web_servers/webapp.yml

[student@workstation inventory-review]$ git commit -m "Created variable files for the A and B groups."
[master 05c2080] Created variable files for the A and B groups.
 2 files changed, 2 insertions(+)
 create mode 100644 group_vars/a_web_servers/webapp.yml
 create mode 100644 group_vars/b_web_servers/webapp.yml

编写yaml清单文件并测试执行

[student@workstation inventory-review]$ cat inventory.yml 
lb_servers:
  hosts:
    servera.lab.example.com:

web_servers:
  children:
    a_web_servers:
      hosts:
        serverb.lab.example.com:
    b_web_servers:
      hosts:
        serverc.lab.example.com:
[student@workstation inventory-review]$ ansible-playbook site.yml -i inventory.yml

改写为变量识别主机并测试运行

[student@workstation inventory-review]$ cat inventory.yml 
lb_servers:
  hosts:
    loadbalancer_1:
      ansible_host: servera.lab.example.com

web_servers:
  children:
    a_web_servers:
      hosts:
        backend_a1:
          ansible_host: serverb.lab.example.com
    b_web_servers:
      hosts:
        backend_b1:
          ansible_host: serverc.lab.example.com
[student@workstation inventory-review]$ ansible-playbook site.yml -i inventory.yml

提交修改后的代码项目

[student@workstation inventory-review]$ git add inventory.yml
[student@workstation inventory-review]$ git commit -m "Added YAML inventory"
[master 3fc697d] Added YAML inventory
 1 file changed, 15 insertions(+)
 create mode 100644 inventory.yml
[student@workstation inventory-review]$ git status
On branch master
Your branch is ahead of 'origin/master' by 2 commits.
  (use "git push" to publish your local commits)

nothing to commit, working tree clean

[student@workstation inventory-review]$ git push
Enumerating objects: 12, done.
Counting objects: 100% (12/12), done.
Delta compression using up to 4 threads.
Compressing objects: 100% (6/6), done.
Writing objects: 100% (10/10), 920 bytes | 920.00 KiB/s, done.
Total 10 (delta 2), reused 0 (delta 0)
To http://git.lab.example.com:8081/git/inventory-review.git
   e1de24a..3fc697d  master -> master

评测与清除实验

[student@workstation inventory-review]$ lab inventory-review grade
[student@workstation inventory-review]$ lab inventory-review finish

---

总结

RHCA认证需要经历5门的学习与考试，还是需要花不少时间去学习与备考的，好好加油，可以噶。

以上就是【金鱼哥】对 第二章 管理清单–章节实验 的简述和讲解。希望能对看到此文章的小伙伴有所帮助。

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