saltstack主机管理项目：编写插件基类-获取主机列表-提取yaml配置文件（四）

一、编写插件基类

1、目录结构

1、我是如何获知我有多少种系统？

1. 当客户端第一连接过来的时候，我就已经把这些文件存下来了 ，存在到哪里了？存到数据库了
2. 每次对主机发送命令的动作时，我从库里把数据取出来，我去判断有几种就可以，每个模块执行之前都要这样的判断,
3. 直接把用户分配给了不同的模块，这就变成我了我每个模块都要写一边(重复劳动)
4. 写一个公共的类，就是提取这些，你一定要有一个公共的类，他的作用是为了规范其他的模块

2、运行结果截图

cmd和state只要一执行就会自动去提取主机

二、获取主机列表

1、目录结构

2、代码解析

1、注册admin组件

from django.contrib import admin

# Register your models here.
from Arya import models
admin.site.register(models.Host)
admin.site.register(models.HostGroup)

2、创建超级用户进入后台创建测试数据

python manage.py createsuperuser

3、默认操作系统类型

from django.db import models

# Create your models here.

class Host(models.Model):
    hostname = models.CharField(max_length=128,unique=True)
    key = models.TextField()
    status_choices = ((0,'Waiting Approval'),
                      (1,'Accepted'),
                      (2,'Rejected'))

    os_type_choices =(
        ('redhat','Redhat\CentOS'),
        ('ubuntu','Ubuntu'),
        ('suse','Suse'),
        ('windows','Windows'),
    )

4、判断输入的命令有没有超过边界

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:luoahong

class BaseSaltModule(object):
    def __init__(self,sys_argvs,db_models,settings):
        self.db_models = db_models
        self.settings = settings
        self.sys_argvs = sys_argvs

    def get_selected_os_types(self):
        data = {}
        for host in self.host_list:
            data[host.os_type] = []
        print('--->data',data)
        return data
    def process(self):
        self.fetch_hosts()
        self.config_data_dic = self.get_selected_os_types()
    def require(self,*args,**kwargs):
        pass
    def fetch_hosts(self):
        print('--fetching hosts---')

        if '-h' in self.sys_argvs or '-g' in self.sys_argvs:
            host_list = []
            if '-h' in self.sys_argvs:
                host_str_index = self.sys_argvs.index('-h') +1
                if len(self.sys_argvs) <= host_str_index:
                    exit("host argument must be provided after -h")
                else: #get the host str
                    host_str = self.sys_argvs[host_str_index]
                    host_str_list = host_str.split(',')
                    host_list += self.db_models.Host.objects.filter(hostname__in=host_str_list)
            if '-g' in self.sys_argvs:
                group_str_index = self.sys_argvs.index('-g') +1
                if len(self.sys_argvs) <= group_str_index:
                    exit("group argument must be provided after -g")
                else: #get the group str
                    group_str = self.sys_argvs[group_str_index]
                    group_str_list = group_str.split(',')
                    group_list = self.db_models.HostGroup.objects.filter(name__in=group_str_list)
                    for group in group_list:
                        host_list += group.hosts.select_related()
            self.host_list = set(host_list)
            return True
            print('----host list:', host_list)
        else:
            exit("host [-h] or group[-g] argument must be provided")

    def syntax_parser(self,section_name,mod_name,mod_data):
        print("-going to parser state data:",section_name,mod_name)
        for state_item in mod_data:
            print("\t",state_item)
            for key,val in state_item.items():
                if hasattr(self,key):
                    state_func = getattr(self,key)
                    state_func(val)
                else:
                    exit("Error:module [%s] has no argument [%s]" %( mod_name,key ))

三、提取yaml配置文件

1、提取配置文件模板

apache:
  pkg.installed: []
   service.running:
     - reload: True
     - watch:
       - file: /etc/httpd/conf/httpd.conf
  user.present:
    - uid: 87
    #- username: alex
    - gid: 87
    - home: /var/www/html
    - shell: /bin/nologin
    - require:
      - group: apache
  group.present:
    - gid: 87
    - require:
      - pkg: apache

 /etc/httpd/conf/httpd.conf:
   file.managed:
     - source: salt://apache/httpd.conf
     - user: root
     - group: root
     - mode: 644

2、目录结构

4、提取配置文件python文件

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:luoahong

class BaseSaltModule(object):
    def __init__(self,sys_argvs,db_models,settings):
        self.db_models = db_models
        self.settings = settings
        self.sys_argvs = sys_argvs

    def get_selected_os_types(self):
        data = {}
        for host in self.host_list:
            data[host.os_type] = []
        print('--->data',data)
        return data
    def process(self):
        self.fetch_hosts()
        self.config_data_dic = self.get_selected_os_types()
    def require(self,*args,**kwargs):
        pass
    def fetch_hosts(self):
        print('--fetching hosts---')

        if '-h' in self.sys_argvs or '-g' in self.sys_argvs:
            host_list = []
            if '-h' in self.sys_argvs:
                host_str_index = self.sys_argvs.index('-h') +1
                if len(self.sys_argvs) <= host_str_index:
                    exit("host argument must be provided after -h")
                else: #get the host str
                    host_str = self.sys_argvs[host_str_index]
                    host_str_list = host_str.split(',')
                    host_list += self.db_models.Host.objects.filter(hostname__in=host_str_list)
            if '-g' in self.sys_argvs:
                group_str_index = self.sys_argvs.index('-g') +1
                if len(self.sys_argvs) <= group_str_index:
                    exit("group argument must be provided after -g")
                else: #get the group str
                    group_str = self.sys_argvs[group_str_index]
                    group_str_list = group_str.split(',')
                    group_list = self.db_models.HostGroup.objects.filter(name__in=group_str_list)
                    for group in group_list:
                        host_list += group.hosts.select_related()
            self.host_list = set(host_list)
            return True
            print('----host list:', host_list)
        else:
            exit("host [-h] or group[-g] argument must be provided")

    def syntax_parser(self,section_name,mod_name,mod_data):
        print("-going to parser state data:",section_name,mod_name)
        for state_item in mod_data:
            print("\t",state_item)
            for key,val in state_item.items():
                if hasattr(self,key):
                    state_func = getattr(self,key)
                    state_func(val)
                else:
                    exit("Error:module [%s] has no argument [%s]" %( mod_name,key ))

5、运行截图

1、获主机信息

2、打印模块详细信息

打印结果截图