python - 使用 ansible 从源代码安装 python 包

Question

我有以下 ansible 剧本:

- hosts: all
  gather_facts: false
  sudo: true
  tasks:
  - name: Pull sources from the repository.
    git: repo=https://github.com/mongodb-labs/mongo-connector.git dest=/srv/checkout/mongo-connector

- hosts: all
  sudo: true
  tasks:
  - name: copy local config.json to remote if exists
    local_action: stat path="./config.json"
    register: file
    ignore_errors: True
  - name: copy file if it exists
    copy: src=./config.json dest=/srv/checkout/mongo-connector/config.json force=yes
    when: file.stat.exists

- hosts: all
  sudo: true
  tasks:
  - name: copy local install_mc.sh to remote if exists
    local_action: stat path="./install_mc.sh"
    register: file
    ignore_errors: True
  - name: copy installation scripts
    copy: src=./install_mc.sh dest=/srv/checkout/mongo-connector/install_mc.sh mode=755
    when: file.stat.exists
  - name: Execute script
    script: /srv/checkout/mongo-connector/install_mc.sh

在这里，我从 github 中拉取一个存储库，然后将 config.json 复制到我克隆 git 存储库的文件夹中。之后，我需要运行 python setup.py install 来安装包，然后在同一目录中运行 python setup.py install_service。

我将两个安装命令都放在一个 shell 文件 install_mc.sh 中，并将该文件复制到我克隆存储库的同一目录中。

git 存储库克隆在 /srv/checkout/mongo-connector/ 中。

目录结构如下:

vagrant@vagrant-ubuntu-trusty-64:/srv/checkout/mongo-connector$ pwd
/srv/checkout/mongo-connector

vagrant@vagrant-ubuntu-trusty-64:/srv/checkout/mongo-connector$ ls
CHANGELOG.rst  config.json  ez_setup.py  install_mc.sh  LICENSE  mongo_connector  README.rst  scripts  setup.cfg  setup.py  tests

但随后我使用 vagrant 运行 ansible 脚本，在执行 install_mc.sh 期间出现以下错误:

==> connector: TASK [Execute script] **********************************************************
==> connector: task path: /vagrant/provisioning/mc_playbook.yml:36
==> connector: fatal: [127.0.0.1]: FAILED! => {"changed": true, "failed": true, "rc": 2, "stderr": "chmod: cannot access ‘./setup.py’: No such file or directory\npython: can't open file './setup.py': [Errno 2] No such file or directory\npython: can't open file './setup.py': [Errno 2] No such file or directory\n", "stdout": "", "stdout_lines": []}
==> connector: 
==> connector: NO MORE HOSTS LEFT *************************************************************
==> connector:  to retry, use: --limit @mc_playbook.retry
==> connector: 
==> connector: PLAY RECAP *********************************************************************
==> connector: 127.0.0.1                  : ok=10   changed=4    unreachable=0    failed=1 

install_mc.sh 的内容是:

#!/usr/bin/env bash

chmod +x ./setup.py
python ./setup.py install
python ./setup.py install_service

我应该如何解决这个问题？

Answer 1

我认为问题在于您假设 install_mc 脚本是从您将其复制到的目录中执行的，但是 script模块实际上从您的本地机器读取，并在远程节点的主目录中执行脚本。

The script module takes the script name followed by a list of space-delimited arguments. The local script at path will be transferred to the remote node and then executed. The given script will be processed through the shell environment on the remote node. This module does not require python on the remote system, much like the raw module.

正如 DeHaan 后来建议的那样，使用 command 运行两个 setup.py 命令可能会更幸运。模块。它允许您指定一个目录(使用 chdir 选项)。

chmod 可能是不必要的，因为 1) 您正在使用 python 二进制文件调用脚本，并且 2) mongo 维护者可能在他们的 git 存储库中建立了适当的权限。