Ansible要求安装MySQL-python，尽管已经安装了它 [英] Ansible demands installing MySQL-python despite it was already installed

问题描述

我正在尝试使用在Mac OSX上运行的Ansible控制器创建一个新的MySQL数据库.当我第一次收到msg: the python mysqldb module is required错误消息时，我添加了一个任务，该任务将MySQL-python与pip一起安装.它已正确安装，但是仍然无法从Ansible中获取错误，要求其安装.

我最小的剧本是:

- hosts: all
  tasks:
  - name: Ensure MySQL-python module is installed
    pip:
      name: MySQL-python
      executalbe: /usr/local/Cellar/python/2.7.10_2/bin/pip

  - name: Create test_db MySQL database
    mysql_db:
      name: test_db
      state: present

当我使用以下命令运行剧本时:

ansible-playbook -i "localhost," -c local mysql-test.yml

我得到以下结果(对于第一次运行的第一个任务，使用changed表示):

TASK: [Ensure MySQL-python module is installed] **************************************
ok: [localhost]

TASK: [Create test_db MySQL database] *********************************************
failed: [localhost] => {"failed": true}
msg: the python mysqldb module is required

pip show MySQL-python显示软件包已正确安装.

我正在运行都安装了homebrew的Python 2.7.10和Ansible 1.9.4，因此我不使用sudo.

缺少什么?

---

• 我在ubuntu/trusty64 Vagrant机器上检查了剧本，并且没问题正常工作(OSX是Ansible控制器，唯一的区别是sudo的要求>模块).

• 我在第二台Mac上都使用-c local在本地检查了该剧本，并通过SSH对其进行了远程检查，并得到与原始问题相同的错误(为了使pip通过SSH正常工作我必须添加executalbe=/usr/local/Cellar/python/2.7.10_2/bin/pip，否则报告为msg: Failed to find required executable pip)

使用-c local -vvvv运行时的任务结果:

<localhost> REMOTE_MODULE mysql_db name=test_db state=present
<localhost> EXEC ['/bin/sh', '-c', 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037 && chmod a+rx $HOME/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037 && echo $HOME/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037']
<localhost> PUT /var/folders/nw/2vnhg_gj77v_cyfv0p1vdfj80000gn/T/tmpK3DT_j TO /Users/techraf/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037/mysql_db
<localhost> EXEC ['/bin/sh', '-c', u'LANG=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 /usr/bin/python /Users/techraf/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037/mysql_db; rm -rf /Users/techraf/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037/ >/dev/null 2>&1']
failed: [localhost] => {"failed": true}
msg: the python mysqldb module is required

解决方案

问题的原因是Ansible使用默认的OSX的Python(/usr/bin/python)，当使用-vvvv选项运行时，结果中可见. /p>

第一个任务成功是因为默认的OSX的Python调用了Homebrew的pip可执行文件，并为Homebrew的Python安装了MySQL-python模块.

第二个任务失败，因为它再次运行默认的OSX的Python，这需要MySQL-python，但未为此版本安装该模块.

解决方案是使用该选项指定Ansible使用的Python解释器的路径:

ansible-playbook -i "localhost," -c local --extra-vars "ansible_python_interpreter=/usr/local/bin/python" mysql-test.yml

或将ansible_python_interpreter=/usr/local/bin/python添加到清单文件.

提到了相同的问题，其中包含其他可能的解决方案的答案.

I am trying to create a new MySQL database with Ansible controller running on Mac OSX. When I first got msg: the python mysqldb module is required error message, I added a task to install the MySQL-python with pip. It got installed correctly, however still I am still getting an error from Ansible demanding its installation.

My minimal playbook is:

- hosts: all
  tasks:
  - name: Ensure MySQL-python module is installed
    pip:
      name: MySQL-python
      executalbe: /usr/local/Cellar/python/2.7.10_2/bin/pip

  - name: Create test_db MySQL database
    mysql_db:
      name: test_db
      state: present

when I run the playbook with:

ansible-playbook -i "localhost," -c local mysql-test.yml

I get the following result (with changed for the first task upon first run):

TASK: [Ensure MySQL-python module is installed] **************************************
ok: [localhost]

TASK: [Create test_db MySQL database] *********************************************
failed: [localhost] => {"failed": true}
msg: the python mysqldb module is required

pip show MySQL-python shows the package got installed correctly.

I am running Python 2.7.10 and Ansible 1.9.4 both installed with homebrew, thus I don't use sudo.

What is missing?

---

• I checked the playbook against ubuntu/trusty64 Vagrant machine and it worked with no problem (with OSX being the Ansible controller, the only difference was a requirement for sudo in pip module).

• I checked the playbook on a second Mac both locally with -c local and remotely via SSH and got the same error as in original question (for pip to work correctly through SSH I had to add executalbe=/usr/local/Cellar/python/2.7.10_2/bin/pip otherwise it reported msg: Failed to find required executable pip)

The results of the task when run with -c local -vvvv:

<localhost> REMOTE_MODULE mysql_db name=test_db state=present
<localhost> EXEC ['/bin/sh', '-c', 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037 && chmod a+rx $HOME/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037 && echo $HOME/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037']
<localhost> PUT /var/folders/nw/2vnhg_gj77v_cyfv0p1vdfj80000gn/T/tmpK3DT_j TO /Users/techraf/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037/mysql_db
<localhost> EXEC ['/bin/sh', '-c', u'LANG=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 /usr/bin/python /Users/techraf/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037/mysql_db; rm -rf /Users/techraf/.ansible/tmp/ansible-tmp-1446497958.1-90296161052037/ >/dev/null 2>&1']
failed: [localhost] => {"failed": true}
msg: the python mysqldb module is required

解决方案

The reason for the problem was that Ansible used the default OSX's Python (/usr/bin/python) which is visible in the results when run with -vvvv option.

First task succeeded because default OSX's Python called Homebrew's pip executable and installed the MySQL-python module for the Homebrew's Python.

The second task failed because it run default OSX's Python again which required MySQL-python, but the module was not installed for this version.

The solution was to use the option to specify the path to the Python interpreter to be used by Ansible:

ansible-playbook -i "localhost," -c local --extra-vars "ansible_python_interpreter=/usr/local/bin/python" mysql-test.yml

or to add ansible_python_interpreter=/usr/local/bin/python to the inventory file.

The same problem was mentioned, it contains answers with other possible solutions.

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