在ansible shell命令中使用{{和}} [英] Using {{ and }} in ansible shell command
问题描述
我的剧本中有这个
- name: Get facts about containers
shell: "docker ps -f name=jenkins --format {%raw%}{{.Names}}{% endraw %}"
register: container
请注意,我插入了{%raw%}
和{%endraw%}
,以便ansible不会忽略'{{'.
Note, that I inserted the {%raw%}
and {%endraw%}
so that ansible does not evaulate the '{{'.
如果运行此命令,则会出现此错误:
If I run this, I get this error:
致命:[localhost]:失败! => {失败":true,"msg":"{u'cmd':u'docker ps -f name = jenkins --format {{.Names}}',u'end':u'2017-01 -19 10:04:27.491648',u'stdout':u'ecs-sde-abn-17-jenkins-ec8eccee8c9eb8e38f01',u'changed':true,u'start':u'2017-01-19 10: 04:27.481090',u'delta':u'0:00:00.010558',u'stderr':u'',u'rc':0,'stdout_lines':[u'ecs-task-17-jenkins- ec8eccee8c9eb8e38f01'],u'警告':[]}:模板化模板时出错,字符串:意外的'.'.字符串:docker ps -f name = jenkins --format {{.Names}}}
fatal: [localhost]: FAILED! => {"failed": true, "msg": "{u'cmd': u'docker ps -f name=jenkins --format {{.Names}}', u'end': u'2017-01-19 10:04:27.491648', u'stdout': u'ecs-sde-abn-17-jenkins-ec8eccee8c9eb8e38f01', u'changed': True, u'start': u'2017-01-19 10:04:27.481090', u'delta': u'0:00:00.010558', u'stderr': u'', u'rc': 0, 'stdout_lines': [u'ecs-task-17-jenkins-ec8eccee8c9eb8e38f01'], u'warnings': []}: template error while templating string: unexpected '.'. String: docker ps -f name=jenkins --format {{.Names}}"}
换句话说,命令成功运行了(输出ecs-task-17-jenkins-ec8eccee8c9eb8e38f01是正确的),但是它随后再次尝试了模板字符串...?
In other words, the command ran succesfully (the output ecs-task-17-jenkins-ec8eccee8c9eb8e38f01 is correct), but than it tries the template the string ... again?
这里出了什么问题,我该如何解决?
What is going wrong here and how can I fix this?
已编辑
像这样对{{
进行转义:
shell: "docker ps -f name=jenkins --format {{ '{' }}{.Names}{{ '}' }}"
导致相同的错误.
推荐答案
这是Ansible 2.2.1中引入的问题: https://github.com/ansible/ansible/issues/20400 .
在内部用{{
注册变量时发生.
This is a problem introduced in Ansible 2.2.1: https://github.com/ansible/ansible/issues/20400.
Happens when registering variable with {{
inside.
此解决方法可以防止{{
出现在注册变量中:
This workaround prevent {{
from appearing in registered variable:
shell: "docker inspect --format '{''{ .NetworkSettings.IPAddress }''}' consul"
重现该错误的方法:
- hosts: localhost
gather_facts: no
tasks:
- shell: "echo '{''{.Names}''}'"
register: myvar
- debug: var=myvar
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