一、管理 FACTS：获取远程主机的 "身份信息"
- FACTS 是 Ansible 自动收集的远程主机详细信息（类似 "主机身份证"），包括主机名、IP、系统版本、硬件配置等。通过 FACTS 可以动态获取主机信息，让 Playbook 更灵活
1. 查看远程主机的完整域名（FQDN）
"playbook.yml"
#vim编辑，查看远程主机（node1）的完整域名（FQDN）
1 ---
2 - name: Dump facts
3 hosts: node1
4
5 tasks:
6 - name: Print all facts
7 debug:
8 var: ansible_facts.fqdn
PLAY [Dump facts] ************************************************************************
TASK [Gathering Facts] *******************************************************************
ok: [node1]
TASK [Print all facts] *******************************************************************
ok: [node1] => {
"ansible_facts.fqdn": "node1.lyk.cloud"
-作用：在 node1 主机上执行，通过 debug 模块打印主机的完整域名（FQDN）。
-关键说明：
ansible_facts.fqdn 是 FACTS 中的变量，存储主机的完整域名（如 node1.lyk.cloud）。
debug: var=变量名 用于在执行时显示变量的值，方便调试。
[lyk@controller web 09:51:25]$ ansible-playbook playbook.yml
2. 查看远程主机的 IPv4 网络信息
1 ---
2 - name: Dump facts
3 hosts: node1
4
5 tasks:
6 - name: Print all facts
7 debug:
8 var: ansible_facts.default_ipv4
TASK [Print all facts] *******************************************************************
ok: [node1] => {
"ansible_facts.default_ipv4": {
"address": "10.1.8.11",
"alias": "ens33",
"broadcast": "10.1.8.255",
"gateway": "10.1.8.2",
"interface": "ens33",
"macaddress": "00:0c:29:1f:2f:2d",
"mtu": 1500,
"netmask": "255.255.255.0",
"network": "10.1.8.0",
"type": "ether"
}
}
-作用：打印 node1 的默认 IPv4 网络信息（IP 地址、网关、子网掩码等）。
关键说明：
-ansible_facts.default_ipv4 是 FACTS 中存储默认网卡 IPv4 信息的变量，包含 address（IP 地址）、gateway（网关）等子字段。
3. 导出所有 FACTS 到文件
#ansible node1 -m setup > node1.facts：把 node1 的所有信息（不止网络，还有系统、硬件等）导出到文件
[lyk@controller web 09:52:44]$ ansible node1 -m setup > node1.facts
#下载到本地电脑，notepad打开，语言选json
[lyk@controller web 09:54:04]$ sz node1.facts
二、loop 循环：批量执行重复任务
- 当需要对多个对象执行相同操作（如安装多个软件、启动多个服务）时，用
loop循环可以简化 Playbook，避免重复写任务。
1. 批量安装软件包和启动服务
[lyk@controller web 10:39:17]$ vim deploy_web.yml
15 # 第一个任务
16 # 任务具有属性：涵name和模块名等。
17 # name属性，用于简要描述任务
18 - name: latest version of httpd and firewalld installed
19
20 # 指明模块名，也就是要执行的任务
21 yum:
22
23 # 执行要操作的rpm包名称
24 name:
25 # rpm包名称是-开头的列表格式，或者逗号分隔的列表格式
26 - httpd
27 - firewalld
28
29 # 定义软件包的状态，lastet代表升级为最新版本
30 state: latest
31
32 # 第二个任务
33 - name: test html page is installed
34 # copy模块，用于将content属性值写入到目标文件
35 copy:
36 content: "Welcome to {{ ansible_fqdn }}\n"
37 dest: /var/www/html/index.html 38
39 # 第三个任务
40 - name: enabled and start httpd/firewalld
41 # service模块，用于启用并启动httpd服务
42 service:
43 name: "{{ item }}" ##注意对齐
44 enabled: true
45 state: started
46 loop: ##注释任务4，和任务3一起执行httpd/firewalld
47 - httpd
48 - firewalld
49
50 # 第四个任务和任务三一起执行
51 # - name: firewalld enabled and running
52 # # service模块，用于启用并启动firewalld服务
53 # service:
54 # name: firewalld
55 # enabled: true
56 # state: started
57
58
59 # 第五个任务
60 - name: firewalld permits access to httpd service
61 # firewalld，用于放行http服务
62 firewalld:
63 service: http
64 permanent: true
65 state: enabled
66 immediate: yes
67
68 # Playbook中第二个play，-开头表示列表
69 - name: Test intranet web server
70 hosts: localhost
71 become: no
72 tasks:
73 - name: connect to intranet web server
74 # uri模块，用于测试网站是否可以访问
75 uri:
76 url: http://node1
77 return_content: yes
78 status_code: 200
79
80 # yaml格式结束行，一般省略
81 ...
[lyk@controller web 10:39:17]$ ansible-playbook deploy_web.yml
2. 循环字典列表：批量创建用户（带不同属性）
[lyk@controller web 09:49:57]$ vim playbook.yml
1 ---
2 - name: add several users
3 hosts: node1
4 gather_facts: no
5 tasks:
6 - name: add user jane
7 user:
8 name: "{{ item }}"
9 groups: "wheel"
10 state: present
11 loop:
12 - jane
13 - joe
[lyk@controller web 10:49:01]$ ansible-playbook playbook.yml
PLAY [add several users] **************************************************************************
TASK [add user jane] ******************************************************************************
changed: [node1] => (item=jane)
changed: [node1] => (item=joe)
[lyk@controller web 10:16:10]$ vim playbook.yml
1 ---
2 - name: add several users
3 hosts: node1
4 gather_facts: no
5 tasks:
6 # - name: add user jane
7 # user:
8 # name: "{{ item }}"
9 # groups: "wheel"
10 # state: present
11 # loop:
12 # - jane
13 # - joe
14 - name: add users
15 user:
16 name: "{{ item.name }}" ##改item->item.name
17 groups: "{{ item.groups }}" ##改item->item.groups
18 state: present
19 loop:
20 - name: jane
21 groups: wheel
22 - name: joe
23 groups: root
3. Do-Until 循环：重试直到成功
[lyk@controller web 10:16:10]$ vim playbook.yml
1 - name: test loop
2 hosts: node1
3 gather_facts: no
4 tasks:
5 - shell: ping -c1 -w 2 node2
6 register: result
7 until: result.rc == 0
8 retries: 20
9 delay: 1
#断开node2
[lyk@node2 ~ 09:36:13]$ init 0
#尝试连接
[lyk@controller web 11:21:53]$ ansible-playbook playbook.yml
PLAY [test loop] *******************************************************************
TASK [shell] ***********************************************************************
FAILED - RETRYING: command (20 retries left).
FAILED - RETRYING: command (19 retries left).
FAILED - RETRYING: command (18 retries left).
......
#恢复连接node2，正常进入
[lyk@controller web 11:23:15]$ ansible-playbook playbook.yml
PLAY [test loop] *******************************************************************
TASK [shell] ***********************************************************************
changed: [node1]
PLAY RECAP *************************************************************************
node1 : ok=1 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
三、when 条件判断：按需执行任务
when用于根据条件决定任务是否执行（类似 "如果满足条件就做，否则跳过"），让 Playbook 更智能
1. 基本条件判断（布尔值、变量是否定义）
#vim playbook.yml
1 ---
2 - name: test
3 hosts: node1
4 gather_facts: no
5 vars:
6 run_my_task: true
7 tasks:
8 - name: test when
9 debug:
10 msg: "Hello run task"
11 when: run_my_task
[lyk@controller web 11:23:20]$ ansible-playbook playbook.yml
PLAY [test] ************************************************************************
TASK [test when] *******************************************************************
ok: [node1] => {
"msg": "Hello run task"
}
PLAY RECAP *************************************************************************
node1 : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
#vim playbook.yml
1 ---
2 - hosts: node1
3 gather_facts: no
4 vars:
5 username: lll #lll也可以不写，主要有username：就行
6 tasks:
7 - debug:
8 msg: "var: username is defined"
9 when: username is defined
2. 判断变量 / 文件 / 设备是否存在
#vim playbook.yml
1 ---
2 - hosts: node1
3 gather_facts: yes
4 tasks:
5 - debug:
6 msg: "sr0 is exist"
7 when: ansible_devices.sr0 is defined
[lyk@controller web 11:47:58]$ ansible-playbook playbook.yml
PLAY [node1] ***********************************************************************
TASK [Gathering Facts] *************************************************************
ok: [node1]
TASK [debug] ***********************************************************************
ok: [node1] => {
"msg": "sr0 is exist"
}
PLAY RECAP *************************************************************************
node1 : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
#vim playbook.yml
1 ---
2 - name: create and use lv
3 hosts: node1
4 tasks:
5 - name: Create a logical volume of 4000m
6 lvol:
7 vg: research
8 lv: data
9 size: 4000
10 when: ansible_lvm.vgs.research is defined
11 - debug:
12 msg: Volume group does not exist
[lyk@controller web 13:30:04]$ ansible-playbook playbook.yml
PLAY [create and use lv] ***********************************************************
TASK [Gathering Facts] *************************************************************
ok: [node1]
TASK [Create a logical volume of 4000m] ********************************************
skipping: [node1]
TASK [debug] ***********************************************************************
ok: [node1] => {
"msg": "Volume group does not exist"
#判断文件是否存在
---
- hosts: node1
gather_facts: no
vars:
file_name: /etc/hosts
tasks:
- debug:
msg: "{{ file_name }} is regular file"
when: file_name is file3. 1根据主机组安装不同软件
1 ---
2 - name: test
3 hosts: node1
4 gather_facts: no
5 vars:
6 username: devops
7 supergroup: wheel
8 tasks:
9 - name: gather user information
10 shell: id {{ username }}
11 register: result
12 - name: Task run if user is in supergroups
13 user:
14 name: "{{ username }}"
15 groups: "{{ supergroup }}"
16 append: yes
17 when: supergroup not in result.stdout
[lyk@node1 ~ 13:26:53]$ sudo useradd devops
[lyk@controller web 13:49:17]$ ansible-playbook playbook.yml
PLAY [test] ************************************************************************
TASK [gather user information] *****************************************************
changed: [node1]
TASK [Task run if user is in supergroups] ******************************************
changed: [node1]
PLAY RECAP *************************************************************************
node1 : ok=2 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
3.2
#根据不同的主机组在指定节点上安装不同的软件（web 服务器和数据库）
#vim "playbook.yml"
1 ---
2 - name: test
3 hosts: node1 node3
4 gather_facts: no
5 tasks:
6 - name: install httpd
7 yum:
8 name: httpd
9 state: present
10 when: inventory_hostname in groups.webs
11 - name: install mariadb
12 yum:
13 name: mariadb
14 state: present
15 when: inventory_hostname in groups.dbs
[lyk@controller web 13:49:20]$ vim inventory
1 controller
2
3 [nodes]
4 node1
5 node2
6 node3
7 node4
8
9 [webs]
10 node1
11 node2
12
13 [dbs]
14 node3
15 node4
[lyk@controller web 14:00:07]$ ansible-playbook playbook.yml
PLAY [test] ************************************************************************
TASK [install httpd] ***************************************************************
skipping: [node3]
ok: [node1]
TASK [install mariadb] *************************************************************
skipping: [node1]
changed: [node3]
PLAY RECAP *************************************************************************
node1 : ok=1 changed=0 unreachable=0 failed=0 skipped=1 rescued=0 ignored=0
node3 : ok=1 changed=1 unreachable=0 failed=0 skipped=1 rescued=0 ignored=0
4. loop + when：循环中过滤执行
示例：当 / 文件系统可用空间大于300000000 安装 mariadb-server
解决方法：通过 ansible_facts 获取 / 文件系统可用空间
#vim "playbook.yml"
1 ---
2 - name: Combining Loops and Conditional Play
3 hosts: node1
4 tasks:
5 - name: install mariadb-server if enough space on root
6 yum:
7 name: mariadb-server
8 state: latest
9 loop: "{{ ansible_mounts }}"
10 when:
11 - item.mount == "/"
12 - item.size_available > 300000000
[lyk@controller web 14:20:44]$ ansible-playbook playbook.yml
PLAY [Combining Loops and Conditional Play] ****************************************
TASK [Gathering Facts] *************************************************************
ok: [node1]
TASK [install mariadb-server if enough space on root] ******************************
skipping: [node1] => (item={u'block_used': 35554, u'uuid': u'b54b3764-2b2b-4a76-a0ec-83e308071ae5', u'size_total': 1063256064, u'block_total': 259584, u'mount': u'/boot', u'block_available': 224030, u'size_available': 917626880, u'fstype': u'xfs', u'inode_total': 524288, u'options': u'rw,relatime,attr2,inode64,noquota', u'device': u'/dev/sda1', u'inode_used': 326, u'block_size': 4096, u'inode_available': 523962})
ok: [node1] => (item={u'block_used': 523935, u'uuid': u'30af660e-85fc-4fa4-b7a8-72102f439059', u'size_total': 53660876800, u'block_total': 13100800, u'mount': u'/', u'block_available': 12576865, u'size_available': 51514839040, u'fstype': u'xfs', u'inode_total': 26214400, u'options': u'rw,relatime,attr2,inode64,noquota', u'device': u'/dev/mapper/centos-root', u'inode_used': 34064, u'block_size': 4096, u'inode_available': 26180336})
PLAY RECAP *************************************************************************
node1 : ok=2 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
5.register 和 when 联合
示例：当 / 文件系统可用空间大于300000000 安装 mariadb-server
解决方法：通过 shell 获取 / 文件系统可用空间
#vim "playbook.yml"
1 ---
2 - name: test
3 hosts: node1
4 gather_facts: no
5 tasks:
6 - name: get / available
7 shell: df / | awk 'NR==2 {print $4}'
8 register: fs_size
9 - name: install mariadb-server
10 yum:
11 name: mariadb-server
12 state: present
13 when: fs_size.stdout | int >= 300000
一、两个 Playbook 的核心功能
两者的核心逻辑都是：
-
检查根目录（/）的可用空间
-
当可用空间满足条件（大于某个值）时，安装 mariadb-server
-
仅在 node1 主机上执行操作
二、具体区别
| 对比维度 | loop + ansible_facts 方式 | register + shell 方式 |
|---|---|---|
| 获取磁盘信息的方式 | 使用 Ansible 内置的ansible_facts收集磁盘信息 |
通过shell命令（df + awk）手动获取磁盘信息 |
| 是否需要收集 facts | 需要（默认启用gather_facts: yes） |
不需要（显式设置gather_facts: no） |
| 循环的使用 | 使用loop: "{``{ ansible_mounts }}"遍历所有挂载点 |
不使用循环，直接获取根目录信息 |
| 条件判断的逻辑 | 1. 先通过item.mount == "/"筛选根目录挂载点 2. 再判断可用空间是否满足条件 |
直接对 shell 命令返回的根目录可用空间进行判断 |
| 可用空间的单位 | ansible_facts返回的是字节（bytes） |
df命令默认返回的是 KB（千字节） |
| 适用场景 | 适合需要处理多个挂载点的复杂场景 | 适合只需要检查单个特定目录的简单场景 |
四、Ansible Handlers：任务改变后触发操作
示例：安装软件后重启服务
[lyk@node1 ~ 14:41:45]$ sudo yum remove -y httpd
#vim "playbook.yml"
1 ---
2 - name: deploy web server
3 hosts: node1
4 tasks:
5 - name: install packages
6 yum:
7 name: httpd
8 state: present
9 notify:
10 - enable and restart apache
11
12 - name: install httpd-manual
13 yum:
14 name: httpd-manual
15 state: present
16 notify:
17 - enable and restart apache
18
19 - debug:
20 msg: last task in tasks
21
22 handlers:
23 - name: enable and restart apache
24 service:
25 name: httpd
26 state: restarted
27 enabled: yes
[lyk@controller web 14:40:28]$ ansible-playbook playbook.yml
PLAY [deploy web server] ***********************************************************
TASK [Gathering Facts] *************************************************************
ok: [node1]
TASK [install packages] ************************************************************
changed: [node1]
TASK [install httpd-manual] ********************************************************
changed: [node1]
TASK [debug] ***********************************************************************
ok: [node1] => {
"msg": "last task in tasks"
}
RUNNING HANDLER [enable and restart apache] ****************************************
changed: [node1]
PLAY RECAP *************************************************************************
node1 : ok=5 changed=3 unreachable=0 failed=0 skipp
#再次执行有区别
[lyk@controller web 14:42:02]$ ansible-playbook playbook.yml
PLAY [deploy web server] ***********************************************************
TASK [Gathering Facts] *************************************************************
ok: [node1]
TASK [install packages] ************************************************************
ok: [node1]
TASK [install httpd-manual] ********************************************************
ok: [node1]
TASK [debug] ***********************************************************************
ok: [node1] => {
"msg": "last task in tasks"
}
PLAY RECAP *************************************************************************
node1 : ok=4 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
meta 模块
在多个任务中间加入meta任务，那么在此之前调用的 handler 会立即处理。
示例：
---
- name: deploy db server
hosts: node1
tasks:
- name: install mariadb
yum:
name:
- mariadb-server
- python3-PyMySQL
state: present
notify:
- enable_and_start_db
- meta: flush_handlers
- name: add mariadb user
mysql_user:
name: lyk
password: redhat
handlers:
- name: enable_and_start_db
service:
name: mariadb
state: started五、错误处理：控制任务失败后的行为
处理 Errors
#node1
[lyk@node1 ~ 15:00:39]$ sudo cp /etc/hosts /etc/myhosts
#node2
[lyk@node2 ~ 15:01:26]$ rm -f /etc/myhosts
[lyk@controller web 15:02:35]$ ansible-playbook playbook.yml
PLAY [test] ************************************************************************
TASK [Gathering Facts] *************************************************************
ok: [node2]
ok: [node1]
TASK [show /etc/myhosts] ***********************************************************
fatal: [node2]: FAILED! => {"changed": true, "cmd": "cat /etc/myhosts", "delta": "0:00:00.002070", "end": "2025-08-14 15:09:39.413406", "msg": "non-zero return code", "rc": 1, "start": "2025-08-14 15:09:39.411336", "stderr": "cat: /etc/myhosts: 没有那个文件或目录", "stderr_lines": ["cat: /etc/myhosts: 没有那个文件或目录"], "stdout": "", "stdout_lines": []}
changed: [node1]
TASK [echo end] ********************************************************************
ok: [node1] => {
"msg": "echo end"
}
PLAY RECAP *************************************************************************
node1 : ok=3 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
node2 : ok=1 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0
ignore_errors
1 ---
2 - name: test
3 hosts: node1
4 tasks:
5 - name: install a not exist package
6 yum:
7 name: notexitpackage
8 state: present
9 ignore_errors: yes
10 register: result
11 - name: debug install result
12 debug:
13 msg: notexitpackage is not exit
14 when: result is failed
[lyk@controller web 15:09:39]$ ansible-playbook playbook.yml
PLAY [test] ************************************************************************
TASK [Gathering Facts] *************************************************************
ok: [node1]
TASK [install a not exist package] *************************************************
fatal: [node1]: FAILED! => {"changed": false, "msg": "No package matching 'notexitpackage' found available, installed or updated", "rc": 126, "results": ["No package matching 'notexitpackage' found available, installed or updated"]}
...ignoring
TASK [debug install result] ********************************************************
ok: [node1] => {
"msg": "notexitpackage is not exit"
}
PLAY RECAP *************************************************************************
node1 : ok=3 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=1
force_handlers
1 ---
2 - name: test
3 hosts: node1
4 force_handlers: yes
5 tasks:
6 - name: a task which always notifies its handler
7 command: /bin/true
8 notify: restart the sshd
9
10 - name: fails because the package doesn't exist
11 yum:
12 name: notexistpkg
13 state: latest
14
15 handlers:
16 - name: restart the sshd
17 service:
18 name: sshd
19 state: restarted
[lyk@controller web 15:10:41]$ ansible-playbook playbook.yml
PLAY [test] ************************************************************************
TASK [Gathering Facts] *************************************************************
ok: [node1]
TASK [a task which always notifies its handler] ************************************
changed: [node1]
TASK [fails because the package doesn't exist] *************************************
fatal: [node1]: FAILED! => {"changed": false, "msg": "No package matching 'notexistpkg' found available, installed or updated", "rc": 126, "results": ["No package matching 'notexistpkg' found available, installed or updated"]}
RUNNING HANDLER [restart the sshd] *************************************************
changed: [node1]
PLAY RECAP *************************************************************************
node1 : ok=3 changed=2 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0
fail 模块
1 - name: test fail module
2 hosts: node1
3 gather_facts: no
4 tasks:
5 - debug:
6 msg: task1
7 - fail:
8 - debug:
9 msg: task3
[lyk@controller web 15:11:41]$ ansible-playbook playbook.yml
PLAY [test fail module] ************************************************************
TASK [debug] ***********************************************************************
ok: [node1] => {
"msg": "task1"
}
TASK [fail] ************************************************************************
fatal: [node1]: FAILED! => {"changed": false, "msg": "Failed as requested from task"}
PLAY RECAP *************************************************************************
node1 : ok=1 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0
failed_when
指明什么条件下，判定任务执行失败
- name: test failed_when
hosts: node1
tasks:
- shell: /root/adduser
register: command_result
failed_when: "'failed' in command_result.stdout"环境准备：
[root@node1 ~]# cat /root/adduser
#!/bin/bash
useradd devops &> /dev/null
if [ $? -eq 0 ];then
echo add user devops success
else
echo add user devops failed
fi
[root@node1 ~]# chmod +x /root/adduser 以上示例：
-
当devops用户不存在时，shell模块跳过执行。
-
当devops用户存在时，shell模块执行失败。
以上示例可改写为fail模块和when语句联合使用：
- name: test fail module
hosts: node1
tasks:
- shell: /root/adduser
register: command_result
- fail:
msg: "add user devops failed"
when: "'failed' in command_result.stdout"changed_when
指明什么条件下，判定任务执行结果为changed。
示例1：
- name: changed_when
hosts: node1
tasks:
- name: upgrade-database
shell: /usr/local/bin/upgrade-database
register: result
changed_when: "'Success' in result.stdout"
notify:
- restart_database
handlers:
- name: restart_database
service:
name: mariadb
state: restarted环境准备：
[root@node1 ~]# yum install -y mariadb-server
[root@node1 ~]# systemctl enable mariadb --now
[root@node1 ~]# vim /usr/local/bin/upgrade-database
#!/bin/bash
mysql -e 'create user lyk@"%" identified by "123";' && mysql -e 'GRANT ALL PRIVILEGES on *.* TO 123@"%";' && echo update database Success
[root@node1 ~]# chmod +x /usr/local/bin/upgrade-database对于command模块和shell模块，只要命令正常执行，结果状态通常都是changed。可以通过返回码和输出结果来判定它们是否做出更改。
关键字 changed_when: false ，让任务结果状态不为changed，只能报告为ok或failed。
示例2：
---
- name: Test When
hosts: node1
gather_facts: no
tasks:
- name: test changed_when
shell: cat /etc/redhat-release
changed_when: falseAnsible block
**示例2：**在所有受管节点上创建符合以下要求的逻辑卷：
-
在research卷组中创建逻辑卷：
-
逻辑卷名称为data
-
逻辑卷大小为4000MiB
-
使用ext4文件系统格式化逻辑卷
-
将逻辑卷挂载到/data目录
-
如果无法创建请求的逻辑卷大小，应显示错误信息：Could not create logical volume of that size 并且应改为使用大小800MiB。
-
-
如果卷组research不存在，应显示错误信息：Volume does not exist
环境准备：
node1添加20G
node2添加20G
[root@node1 ~ 15:36:17]# vgcreate research /dev/sdb
Physical volume "/dev/sdb" successfully created.
Volume group "research" successfully created
[root@node2 ~ 15:37:09]# parted /dev/sdb unit MiB mklabel msdos
信息: You may need to update /etc/fstab.
[root@node2 ~ 15:37:26]# parted /dev/sdb unit MiB mkpart primary 1 1025
信息: You may need to update /etc/fstab.
[root@node2 ~ 15:37:34]# vgcreate research /dev/sdb1
Physical volume "/dev/sdb1" successfully created.
Volume group "research" successfully createdvim编辑
[lyk@controller web 16:02:28]$ ansible-doc -l |grep -i lvm
aix_filesystem Configure LVM and...
aix_lvg Manage LVM volume...
lvol Configure LVM log...
aix_lvol Configure AIX LVM...
lvg Configure LVM vol...
[lyk@controller web 16:03:12]$ ansible-doc lvol
#进入文件复制
EXAMPLES:
- name: Create a logical volume of 512m
lvol:
vg: firefly
lv: test
size: 512
1 ---
2 - name: create logical volume
3 hosts: all
4 tasks:
5 - name: create lv
6 block:
7 - name: Create a logical volume of 4000m
8 lvol:
9 vg: research
10 lv: data
11 size: 4000
12 rescue:
13 - name: Could not create logical volume of that size
14 debug:
15 msg: Could not create logical volume of that size
16 - name: Create a logical volume of 800m
17 lvol:
18 vg: research
19 lv: data
20 size: 800
21 always:
22 - name: Create a ext4 filesystem
23 filesystem:
24 fstype: ext4
25 dev: /dev/research/data
26 - name: Create a directory
27 file:
28 path: /data
29 state: directory
30 - name: Mount up device
31 mount:
32 path: /data
33 src: /dev/research/data
34 fstype: ext4
35 state: mounted
36 when: ansible_lvm.vgs.research is defined
37 - name: Volume does not exist
38 debug:
39 msg: Volume does not exist
40 when: ansible_lvm.vgs.research is defined
[lyk@controller web 16:37:04]$ ansible-playbook playbook.yml
PLAY [create logical volume] *******************************************************
TASK [Gathering Facts] *************************************************************
ok: [node3]
ok: [node1]
ok: [node2]
ok: [node4]
ok: [controller]
TASK [Create a logical volume of 4000m] ********************************************
skipping: [controller]
skipping: [node3]
skipping: [node4]
[WARNING]: The value 4000 (type int) in a string field was converted to u'4000'
(type string). If this does not look like what you expect, quote the entire value
to ensure it does not change.
fatal: [node2]: FAILED! => {"changed": false, "err": " Volume group \"research\" has insufficient free space (255 extents): 1000 required.\n", "msg": "Creating logical volume 'data' failed", "rc": 5}
changed: [node1]
TASK [Could not create logical volume of that size] ********************************
ok: [node2] => {
"msg": "Could not create logical volume of that size"
}
TASK [Create a logical volume of 800m] *********************************************
[WARNING]: The value 800 (type int) in a string field was converted to u'800' (type
string). If this does not look like what you expect, quote the entire value to
ensure it does not change.
changed: [node2]
TASK [Create a ext4 filesystem] ****************************************************
skipping: [controller]
skipping: [node3]
skipping: [node4]
changed: [node2]
changed: [node1]
TASK [Create a directory] **********************************************************
skipping: [controller]
skipping: [node3]
skipping: [node4]
changed: [node2]
changed: [node1]
TASK [Mount up device] *************************************************************
skipping: [controller]
skipping: [node3]
skipping: [node4]
changed: [node1]
changed: [node2]
TASK [Volume does not exist] *******************************************************
skipping: [controller]
ok: [node2] => {
"msg": "Volume does not exist"
}
ok: [node1] => {
"msg": "Volume does not exist"
}
skipping: [node3]
skipping: [node4]
PLAY RECAP *************************************************************************
controller : ok=1 changed=0 unreachable=0 failed=0 skipped=5 rescued=0 ignored=0
node1 : ok=6 changed=4 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
node2 : ok=7 changed=4 unreachable=0 failed=0 skipped=0 rescued=1 ignored=0
node3 : ok=1 changed=0 unreachable=0 failed=0 skipped=5 rescued=0 ignored=0
node4 : ok=1 changed=0 unreachable=0 failed=0 skipped=5 rescued=0 ignored=0