说明
工作中经常遇到添加一批机器需要安装软件。云环境没有kickstart之类的自动装机初始化的工具，需要我们手动安装。有人会说可以用ansible、salt之类的工具，但是我们把机器加入我们资产平台后，又要去ansible或salt中去配置主机信息。同样的事情做了2次，这不是做运维该干的事。于是写一个平台，ansible从资产平台中获取机器信息，然后调用api安装服务，局部效果如下：
ansible_install.png
代码
以下代码是测试环境该功能的局部代码
前端代码
<html>
<head>
<link href="/static/css/bootstrap.min.css" rel="stylesheet">
<link href="/static/css/select2.min.css" rel="stylesheet">
</head>
<body>
<form class="form-horizontal nice-validator n-yellow">
<div class="form-group">
<label class="col-sm-3 control-label">选择主机：</label>
<div class="col-sm-4">
<select id="hostlist" class="selectpicker show-tick form-control" multiple="multiple" data-live-search="false">
{% for hosts in object_list %}
<option value={{ hosts.id }}>{{ hosts.hostname }}<{{ hosts.ip }}></option>
{% endfor %}
</select>
</div>
</div>
<div class="form-group">
<label class="col-sm-3 control-label">选择服务：</label>
<div class="col-sm-4">
<select id="applist" class="selectpicker show-tick form-control" multiple="multiple" data-live-search="false">
<option value=0>jdk</option>
<option value=1>nginx</option>
<option value=2>zookeeper</option>
</select>
</div>
</div>
<div class="form-group">
<div class="col-sm-4 col-sm-offset-4">
<button id="button_clean" class="btn btn-white" type="reset">取消</button>
<button id="submit_button" class="btn btn-primary">安装</button>
</div>
</div>
</form>
<script src="/static/js/jquery-3.2.1.min.js"></script>
<script src="/static/js/bootstrap.min.js"></script>
<script src="/static/js/select2.min.js"></script>
<script>
function select_fun(id){
$(id).select2({
placeholder: "请选择...",
page: 2
})
}
select_fun("#hostlist");
select_fun("#applist");
$("#button_clean").click(function(){
$("select").val(null).trigger("change");
})
$("#submit_button").click(function(){
var hosts = $("#hostlist").val();
var apps = $("#applist").val();
//console.log({"host_list": hosts, "app_list": apps});
$.ajax({
type: "POST",
url: "/host/installapp/",
data: JSON.stringify({"hosts": hosts, "apps": apps}),
dataType: "json",
success: function(data){
console.log(data);
}
})
return false
})
</script>
</body>
</html>
为了方便，直接将服务列表写死在代码里，生产中应该和主机信息一样，从数据库获取然后在模板中渲染
后端Django代码
# -*- coding: utf-8 -*-
from django.views.generic import ListView, TemplateView, View
from models import Hosts
from django.http import JsonResponse
import json
from utils.ansible_api import Ansible_api
# Create your views here.
class InstallApp(ListView):
template_name = "install_app.html"
model = Hosts
class InstallAppView(View):
def post(self, request):
app_list = json.loads(request.body).get("apps")
host_list = json.loads(request.body).get("hosts")
host_obj = Hosts.objects.filter(id__in=host_list).values("ip")
ip_list = []
for host in host_obj:
ip_list.append(host.get("ip"))
for app_id in app_list:
if app_id == "0":
Ansible_api(ip_list).run_playbook(["/etc/ansible/roles/jdk.yml"])
elif app_id == "1":
app_name = "nginx"
elif app_id == "2":
app_name = "zookeeper"
return JsonResponse({'test':'test'})
2个类视图，一个是显示安装服务页面，一个处理ajax请求安装对应服务，因为前端直接在代码把服务信息写死，这里为了方便也在代码里写死，正确做法应该和主机信息一样从数据库里获取。
ansible api 代码
#!/usr/bin/python
#coding=utf8
import json
from collections import namedtuple
from ansible.parsing.dataloader import DataLoader
from ansible.vars import VariableManager
from ansible.inventory import Inventory
from ansible.playbook.play import Play
from ansible.executor.task_queue_manager import TaskQueueManager
from ansible.executor.playbook_executor import PlaybookExecutor
from ansible.plugins.callback import CallbackBase
class Ansible_api:
def __init__(self, hosts):
self.loader = DataLoader()
self.variable_manager = VariableManager()
self.inventory = Inventory(loader=self.loader, variable_manager=self.variable_manager, host_list=hosts)
self.variable_manager.set_inventory(self.inventory)
Options = namedtuple("Options",['connection', 'forks', 'check', 'module_path', 'passwords', 'become', 'become_method', 'become_user', 'listhosts', 'listtasks', 'listtags', 'syntax'])
self.options = Options(connection="smart", forks=5, check=False, module_path=None, passwords=None, become=None, become_method=None, become_user=None, listhosts=None, listtasks=None, listtags=None, syntax=None)
def run_adhoc(self, module, args=""):
play_source = {
"name": "ansible api run_adhoc",
"hosts": "all",
"gather_facts": "no",
"tasks": [
{"action":{"module": module, "args": args}}
]
}
play = Play().load(play_source, variable_manager=self.variable_manager, loader=self.loader)
tqm = None
try:
tqm = TaskQueueManager(
inventory = self.inventory,
variable_manager = self.variable_manager,
loader = self.loader,
options = self.options,
passwords = None,
stdout_callback = "minimal",
)
result = tqm.run(play)
print result
finally:
if tqm is not None:
tqm.cleanup()
def run_playbook(self, yaml_file_list):
# 这里extra_vars作用是为playbook yml文件传变量
#self.variable_manager.extra_vars = {"host": host}
pb = PlaybookExecutor(
playbooks=yaml_file_list,
inventory=self.inventory,
variable_manager=self.variable_manager,
loader=self.loader,
passwords = None,
options=self.options
)
result = pb.run()
print result
if __name__ == "__main__":
ansible_api = Ansible_api(["192.168.111.128"])
#ansible_api.run_adhoc("ping")
#ansible_api.run_adhoc("shell", "cat /etc/redhat-release")
ansible_api.run_playbook(["/etc/ansible/roles/jdk.yml"])
这里用的ansible api 2.3.0的版本,最新的api 2.4和2.3有区别，坑了我半天。
最后声明：这里只是测试代码，主要是提供思路，要改进调整的地方还有很多，比如ansible安装信息返回给前端、前端显示安装进度、ansible playbook相关信息记录到数据库、权限控制等等。
ansible api 运行模块可以将输出返回给Django，而运行playbook则默认只有标准输出，无法捕获到运行结果，可以参考这个项目对callback重写： https://github.com/welliamcao/OpsManage
