如何在Ubuntu上通过Ansible安装Python 2.7.3

Question

我正在尝试在ubuntu 12上通过ansible安装python 2.7.3

- name: Add snake repository
  apt_repository: repo='ppa:fkrull/deadsnakes' state=present
- name: Install postgresql
  apt: pkg=python2.7 state=present 
  sudo: true
  remote_user: vagrant

但是我遇到了这个错误

TASK: [Add snake repository] **************************************************
failed: [192.168.0.28] => {"cmd": ["apt-key", "adv", "--recv-keys", "--keyserver", "hkp://keyserver.ubuntu.com:80", "FF3997E83CD969B409FB24BC5BB92C09DB82666C"], "failed": true, "rc": 2}
stderr: gpg: requesting key DB82666C from hkp server keyserver.ubuntu.com
gpg: no writable keyring found: eof
gpg: error reading `[stream]': general error
gpg: Total number processed: 0

stdout: Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 FF3997E83CD969B409FB24BC5BB92C09DB82666C

msg: gpg: requesting key DB82666C from hkp server keyserver.ubuntu.com
gpg: no writable keyring found: eof
gpg: error reading `[stream]': general error
gpg: Total number processed: 0

FATAL: all hosts have already failed -- aborting

请问什么是apt_key，怎么获取它呢？

Answer 1

你尝试使用的PPA（个人包存档）里没有Python 2.7.3。写这段话的时候，它只有2.7.2和2.7.6版本。如果你想要Python 2.7.3，可以在标准的precise-updates库里找到，链接是http://packages.ubuntu.com/precise-updates/python-all

如果你还是想用那个PPA，在使用apt_repository之前，你需要先用apt_key模块来添加这个PPA的签名密钥。更新你的剧本，在apt_repo块之前加上这个：

- name: Add snake repo signing key
  apt_key: id=DB82666C
           url=http://keyserver.ubuntu.com:11371/pks/lookup?op=get&search=0x5BB92C09DB82666C
           state=present

另外，如果你的包安装块叫“Postgresql”，你可能需要修正一下这个名字。