ansible作为python模块库使用的例子

Asible是运维工具中算是非常好的利器，我个人比较喜欢，可以根据需求灵活配置yml文件来实现不同的业务需求，因为不需要安装客户端，上手还是非常容易的，在某些情况下你可能需要将ansible作为python的一个库组件写入到自己的脚本中，今天的脚本脚本就将展示下ansible如何跟python脚本结合，也就是如何在python脚本中使用ansible，我们逐步展开，先看第一个例子：

#!/usr/bin/python
import ansible.runner
import ansible.playbook
import ansible.inventory
from ansible import callbacks
from ansible import utils
import json

# the fastest way to set up the inventory

# hosts list
hosts = ["10.11.12.66"]
# set up the inventory, if no group is defined then 'all' group is used by default
example_inventory = ansible.inventory.Inventory(hosts)

pm = ansible.runner.Runner(
    module_name = 'command',
    module_args = 'uname -a',
    timeout = 5,
    inventory = example_inventory,
    subset = 'all' # name of the hosts group
    )

out = pm.run()

print json.dumps(out, sort_keys=True, indent=4, separators=(',', ': '))

这个例子展示我们如何在python脚本中运行如何通过ansible运行系统命令，我们接下来看第二个例子，跟我们的yml文件对接，简单的yml文件内容如下：

- hosts: sample_group_name
  tasks:
    - name: just an uname
      command: uname -a

调用playbook的python脚本如下：

#!/usr/bin/python
import ansible.runner
import ansible.playbook
import ansible.inventory
from ansible import callbacks
from ansible import utils
import json

### setting up the inventory

## first of all, set up a host (or more)
example_host = ansible.inventory.host.Host(
    name = '10.11.12.66',
    port = 22
    )
# with its variables to modify the playbook
example_host.set_variable( 'var', 'foo')

## secondly set up the group where the host(s) has to be added
example_group = ansible.inventory.group.Group(
    name = 'sample_group_name'
    )
example_group.add_host(example_host)

## the last step is set up the invetory itself
example_inventory = ansible.inventory.Inventory()
example_inventory.add_group(example_group)
example_inventory.subset('sample_group_name')

# setting callbacks
stats = callbacks.AggregateStats()
playbook_cb = callbacks.PlaybookCallbacks(verbose=utils.VERBOSITY)
runner_cb = callbacks.PlaybookRunnerCallbacks(stats, verbose=utils.VERBOSITY)

# creating the playbook instance to run, based on "test.yml" file
pb = ansible.playbook.PlayBook(
    playbook = "test.yml",
    stats = stats,
    callbacks = playbook_cb,
    runner_callbacks = runner_cb,
    inventory = example_inventory,
    check=True
    )

# running the playbook
pr = pb.run() 

# print the summary of results for each host
print json.dumps(pr, sort_keys=True, indent=4, separators=(',', ': '))

今天展示2个小例子希望对大家有帮助。