ansible剧本中声明变量的正确方法
我有以下剧本:ansible剧本中声明变量的正确方法,ansible,ansible-playbook,ansible-2.x,Ansible,Ansible Playbook,Ansible 2.x,我有以下剧本: 1 --- 2 - hosts: lxc_hosts 3 name: install software on lxc container 4 tasks: 5 - name: get list of containers on lxc host {{inventory_hostname}} 6 shell: > 7 lxc-ls | more | tr '\n' ',' | sed 's/,$//' 8
1 ---
2 - hosts: lxc_hosts
3 name: install software on lxc container
4 tasks:
5 - name: get list of containers on lxc host {{inventory_hostname}}
6 shell: >
7 lxc-ls | more | tr '\n' ',' | sed 's/,$//'
8 register: containers
9 - set_fact:
10 container_list: "{{ containers.stdout.split(',')|select('match', 'server*')|list }}"
11 - debug: msg="{{item}}"
12 with_items:
13 - "{{container_list}}"
14 - name: Run memory command within "running" container
15 lxc_container:
16 name: "{{item}}"
17 with_items:
18 - "{{container_list}}"
19 container_command: |
20 df -h
21 register: memory_check
22 - debug: msg="{{memory_check.stdout}}"
这将返回以下结果:
PLAY [install software on lxc container]
****************************************
TASK [setup]
*******************************************************************
ok: [10.1.1.1]
TASK [get list of containers on lxc host 10.1.1.1]
*************************
changed: [10.1.1.1]
TASK [set_fact]
****************************************************************
ok: [10.1.1.1]
TASK [debug]
*******************************************************************
ok: [10.1.1.1] => (item=server1-container) => {
"item": "server1-container",
"msg": "server1-container" }
ok: [10.1.1.1] => (item=server2-container) => {
"item": "server2-container",
"msg": "server2-container" }
ok: [10.1.1.1] => (item=server3-container) => {
"item": "server3-container",
"msg": "server3-container" }
TASK [Run memory command within "running" container]
***************************
fatal: [10.1.1.1]: FAILED! => {"failed": true, "msg": "'item' is undefined"}
NO MORE HOSTS LEFT
*************************************************************
to retry, use: --limit @playbooks/inventory_get_containers_on_lxc.retry
PLAY RECAP
*********************************************************************
10.1.1.1 : ok=4 changed=1 unreachable=0 failed=1
mymachine:/etc/ansible#
我一直在“实战”和“变形金刚”之间游手好闲,但我似乎没法继续下去。如您所见,第11行的debug语句将产生下面的列表。。。这似乎是工作。。。这似乎证明了我设置的变量是正确的。
我不知道还能尝试什么
谢谢
编辑1
这就是我的代码在该特定部分的外观:
14 - name: Run memory command within "running" container
15 lxc_container:
16 name: "{{item}}"
17 with_items:
18 # - "{{ containers.stdout.split(',')|select('match', 'server*')|list }}"
19 - "{{container_list}}"
20 container_command: |
21 df -h
22 register: memory_check
23 - debug: msg="{{memory_check.stdout}}"
当我运行它时,会收到以下错误消息:
错误!加载YAML时出现语法错误
错误似乎出现在“/etc/ansible/playbooks/lxc_container_test.yml”中:第20行第7列,但可能是
根据确切的语法问题,在文件中的其他位置
令人不快的一行似乎是:
- "{{container_list}}"
container_command: |
^ here
第20行与第17行的“带项目”行相比缩进了2个空格,这是更正的代码。您已正确定义变量。
set fact
用于定义游戏中的全局变量。只有带有_项的缩进不正确。现在应该可以了
15 lxc_container:
16 name: "{{item}}"
17 with_items:
18 - "{{container_list}}"
19 container_command: |
20 df -h
21 register: memory_check
22 - debug: msg="{{memory_check.stdout}}"
第15-22行中的剧本不正确(特别是缩进和引号),正确的形式是:
lxc_container:
name: {{ item }}
container_command: |
df -h
register: memory_check
with_items: container_list
“running”容器中的runmemory命令
任务的缩进不正确
with_items
和register
都是Ansible任务的属性,而不是lxc_容器
模块的属性,因此它们应该与Ansible任务属性内联缩进
原件:
14 - name: Run memory command within "running" container
15 lxc_container:
16 name: "{{item}}"
# with_items is a Ansible Task property, so it shouldn't be here
17 with_items:
18 - "{{container_list}}"
19 container_command: |
20 df -h
# register is an Ansible Task property, so it shouldn't be here
21 register: memory_check
更正:
# Ansible task properties are intented at this level
14 - name: Run memory command within "running" container
17 with_items: "{{container_list}}"
15 lxc_container:
# lxc_container properties are indented at this level
16 name: "{{item}}"
19 container_command: |
20 df -h
21 register: memory_check
你好我试过你的建议,但我遇到了语法错误。请参见编辑1有关更正的语法,请参见此处的答案:注册
和带项目
需要取消两个空格的缩进,以便将它们与lxc\u容器
对齐。我试着编辑这篇文章,但是stackoverflow不允许4字符的空白编辑…而且{{item}}需要引号来防止它成为YAML字典,例如:name:“{{item}”