使用 Ansible 获取 Docker 的 IP 地址 [英] Get IP address of Docker with Ansible

问题描述

我已经按照剧本命令:

  - name: Docker | Consul | Get ip
    shell: "docker inspect --format {% raw %}'{{ .NetworkSettings.IPAddress }}' {% endraw %} consul"
    register: consul_ip

运行 ansible 后返回如下错误:

After run ansible return follow error:

致命:[192.168.122.41]:失败！=> {"failed": true, "msg": "{u'cmd':u\"docker inspect --format '{{ .NetworkSettings.IPAddress }}'领事\", u'end': u'2017-01-18 16:52:18.786469',u'stdout': u'172.17.0.2', u'changed': True, u'start': u'2017-01-1816:52:18.773819', u'delta': u'0:00:00.012650', u'stderr': u'', u'rc':0, 'stdout_lines': [u'172.17.0.2'], u'warnings': []}: 模板错误而模板字符串:意外的'.'.字符串:码头工人检查--format '{{ .NetworkSettings.IPAddress }}' 领事"}

fatal: [192.168.122.41]: FAILED! => {"failed": true, "msg": "{u'cmd': u\"docker inspect --format '{{ .NetworkSettings.IPAddress }}' consul\", u'end': u'2017-01-18 16:52:18.786469', u'stdout': u'172.17.0.2', u'changed': True, u'start': u'2017-01-18 16:52:18.773819', u'delta': u'0:00:00.012650', u'stderr': u'', u'rc': 0, 'stdout_lines': [u'172.17.0.2'], u'warnings': []}: template error while templating string: unexpected '.'. String: docker inspect --format '{{ .NetworkSettings.IPAddress }}' consul"}

Ansible 版本:

Ansible version:

ansible 2.2.1.0
  config file = /etc/ansible/ansible.cfg
  configured module search path = Default w/o overrides

如何正确获取容器的IP地址?

How right way to get IP address of container?

推荐答案

使用 bash 连接能力的技巧:

Trick with bash concatenation ability:

shell: "docker inspect --format '{''{ .NetworkSettings.IPAddress }''}' consul"

这将在 bash 中将 {+{ .NetworkSettings.IPAddress }+} 粘贴到单个字符串中.

This will stick together {+{ .NetworkSettings.IPAddress }+} into single string in bash.

更新:此行为的根本原因是此处描述.

Update: the root cause of this behaviour is described here.

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