Question

我正在使用Ansible安装PHP的Pear包，如下所示：

- name: Add Phergie PEAR channel.
  command: pear channel-discover pear.phergie.org
  ignore_errors: yes

- name: Install Phergie and related plugins.
  command: pear install pear.phergie.org/{{ item }}
  with_items:
  - Phergie
  - Phergie_Plugin_AltNick
  ignore_errors: yes

ignore_errors是必需的，因为当运行之前已成功运行/完成的命令时，pear总是报告错误（例如：

TASK: [Add Phergie PEAR channel.] ********************************************* 
failed: [10.31.9.210] => {"changed": true, "cmd": ["pear", "channel-discover", "pear.phergie.org"], "delta": "0:00:01.089340", "end": "2013-12-27 10:16:25.640083", "item": "", "rc": 1, "start": "2013-12-27 10:16:24.550743"}
stdout: Channel "pear.phergie.org" is already initialized
...ignoring

TASK: [Install Phergie and related plugins.] ********************************** 
failed: [10.31.9.210] => (item=Phergie) => {"changed": true, "cmd": ["pear", "install", "pear.phergie.org/Phergie"], "delta": "0:00:03.698780", "end": "2013-12-27 10:16:30.337371", "item": "Phergie", "rc": 1, "start": "2013-12-27 10:16:26.638591"}
stdout: phergie/Phergie is already installed and is the same as the released version 2.1.0
install failed
...ignoring
failed: [10.31.9.210] => (item=Phergie_Plugin_AltNick) => {"changed": true, "cmd": ["pear", "install", "pear.phergie.org/Phergie_Plugin_AltNick"], "delta": "0:00:01.779589", "end": "2013-12-27 10:16:33.231524", "item": "Phergie_Plugin_AltNick", "rc": 1, "start": "2013-12-27 10:16:31.451935"}
stdout: phergie/Phergie_Plugin_AltNick is already installed and is the same as the released version 2.1.0
install failed
...ignoring

是否有更好（更幂等）的方式来运行pear命令，而不必滚动一堆大的，红色忽略的错误？

Answer 1

好吧，所以在玩了一下change_when属性之后，我终于找到了解决方案（在不同的剧本上测试，我在那里安装drush而不是Phergie，但问题/解决方案完全一样：

剧本：

- name: Setup drush PEAR channel.
  command: pear channel-discover pear.drush.org
  register: channel_result
  environment: proxy_env
  changed_when: "'initialized' not in channel_result.stdout"
  # TODO: This will always error out the first time it's run.
  failed_when: "'already initialized' not in channel_result.stdout"

- name: Install drush.
  command: pear install drush/drush
  register: drush_result
  environment: proxy_env
  changed_when: "'installed' not in drush_result.stdout"
  failed_when: "'6.2.0.0' not in drush_result.stdout"

Ansible的新输出：

TASK: [Setup drush PEAR channel.] ********************************************* 
ok: [midwesternmac]

TASK: [Install drush.] ******************************************************** 
ok: [midwesternmac]

现在在摘要中，不是为每个服务器和每个pear命令报告额外的'已更改'，Ansible仅报告“已更改”，如果有更改。有关changed_when和failed_when（需要Ansible＆gt; = 1.3）的更多文档（尽管稀疏）可在此处获取：Error Handling In Playbooks

Answer 2

从Ansible v2开始，有一个额外的模块用于管理PEAR扩展：http://docs.ansible.com/ansible/pear_module.html

所以现在你可以使用：

Template.articles.events({
   'click button' : function() {
        console.log(this.name); // it would print your button value,basically this refers to the article object which gets clicked
        // load your article here
   }
});

Answer 3

- name: Install drush.
  command: pear upgrade drush/drush

不确定是否使用＆＃39;升级＆＃39;而不是安装＆＃39;很好地转换为您领先的频道发现命令

通过Ansible安装PHP Pear包，具有幂等性

3 个答案: