Saltstack (2) grains和pillar及jinja模板

左手的ㄟ右手 2022-12-01 15:35 184阅读 0赞

### 文章目录 ###

*   *   *  grains
         *   *  grains简介
             *  使用grains
             *  自定义grains
             *  grains匹配
         *  pillar
         *   *  pillar简介
             *  声明pillar
             *  自定义pillar项
         *  jinja模板
         *   *  Jinja模板使用方式
             *  Jinja在普通文件的使用
             *  使用pillar和grains
             *  导入变量
         *  部署keepalived

### grains ###

#### grains简介 ####

Grains是SaltStack的一个组件，存放在SaltStack的minion端。  
当salt-minion启动时会把收集到的数据静态存放在Grains当中，只有当minion重启时才会进行数据的更新。  
由于grains是静态数据，因此不推荐经常去修改它。  
应用场景：  
信息查询，可用作CMDB。  
在target中使用，匹配minion。  
在state系统中使用，配置管理模块

#### 使用grains ####

查询minion端的IP、FQDN

[root@server1 salt]# salt server3 grains.item fqdn
    server3:
        ----------
        fqdn:
            server3
    [root@server1 salt]# salt server3 grains.item ipv4
    server3:
        ----------
        ipv4:
            - 127.0.0.1
            - 172.25.254.103

#### 自定义grains ####

自定义grains有三种方法

*  1 修改/etc/salt/minion

129 grains:
    130   roles:
    131     - apache

必须重启生效

[root@server1 salt]# salt server2 grains.item roles
    server2:
        ----------
        roles:
            - apache

*  2 在/etc/salt/grains中定义

[root@server3 ~]# vim /etc/salt/grains
    [root@server3 ~]# cat /etc/salt/grains
    roles: nginx

[root@server1 salt]# salt server3 saltutil.sync_grains
    server3:
    [root@server1 salt]# salt server3 grains.item roles
    server3:
        ----------
        roles:
            nginx

*  3 编写grains模块  
    在salt-master端创建\_grains目录：  
    新建my\_grain.py

def my_grain():
        grains = {
        }
        grains['hello'] = 'hahaha'
        return grains

salt server3 saltutil.sync\_grains 同步模块

[root@server1 salt]# salt '*' saltutil.sync_grains
    server3:
        - grains.my_grain
    server2:
        - grains.my_grain
    [root@server1 salt]# salt '*' grains.item hello
    server2:
        ----------
        hello:
            hahaha
    server3:
        ----------
        hello:
            hahaha

#### grains匹配 ####

*  在target中匹配minion：

[root@server1 salt]# salt -G roles:apache cmd.run "systemctl status httpd"
    server2:
        * httpd.service - The Apache HTTP Server
           Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
           Active: active (running) since Thu 2020-08-27 17:43:42 CST; 3h 43min ago
             Docs: man:httpd(8)
                   man:apachectl(8)
         Main PID: 14495 (httpd)
           Status: "Total requests: 0; Current requests/sec: 0; Current traffic:   0 B/sec"
           CGroup: /system.slice/httpd.service
                   |-14495 /usr/sbin/httpd -DFOREGROUND
                   |-14497 /usr/sbin/httpd -DFOREGROUND
                   |-14498 /usr/sbin/httpd -DFOREGROUND
                   |-14501 /usr/sbin/httpd -DFOREGROUND
                   |-14502 /usr/sbin/httpd -DFOREGROUND
                   `-14503 /usr/sbin/httpd -DFOREGROUND
        
        Aug 27 17:43:42 server2 systemd[1]: Starting The Apache HTTP Server...
        Aug 27 17:43:42 server2 httpd[14495]: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 172.25.254.102. Set the 'ServerName' directive globally to suppress this message
        Aug 27 17:43:42 server2 systemd[1]: Started The Apache HTTP Server.

*  在top文件中匹配：  
    /srv/salt/top.sls

base:
      'roles:apache':
        - match: grain
        - httpd.service
      'roles:nginx':
        - match: grain
        - nginx.service

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### pillar ###

#### pillar简介 ####

*  pillar和grains一样也是一个数据系统，但是应用场景不同。
 *  pillar是将信息动态的存放在master端，主要存放私密、敏感信息（如用户名密码等），而且可以指定某一个minion才可以看到对应的信息。
 *  pillar更加适合在配置管理中运用。

#### 声明pillar ####

*  定义pillar基础目录

837 pillar_roots:
     838   base:
     839     - /srv/pillar

[root@server1 srv]# mkdir pillar
    [root@server1 srv]# ls
    pillar  salt

#### 自定义pillar项 ####

[root@server1 pillar]# tree
    .
    ├── top.sls
    └── web
        └── init.sls

[root@server1 pillar]# cat top.sls 
    base:
      '*':
        - web
    [root@server1 pillar]# cat web/init.sls 
    {
        % if grains['fqdn'] == 'server3' %}
    package: nginx
    {
        % elif grains['fqdn'] == 'server2' %}
    package: httpd
    {
        % endif %}

*  查询  
    salt ‘\*’ saltutil.refresh\_pillar

[root@server1 pillar]# salt '*' saltutil.refresh_pillar
    server3:
        True
    server2:
        True
    [root@server1 pillar]# salt '*' pillar.item package
    server3:
        ----------
        package:
            nginx
    server2:
        ----------
        package:
            httpd

*  匹配pillar项  
    命令行中匹配：

[root@server1 srv]# salt -I 'package:nginx' cmd.run "hostname"
    server3:
        server3

state系统中使用：

apache-deploy:
      pkg.installed:
        - pkgs:
          - {
        {
         pillar['package']}}
          - php
          - php-mysql
    
    
      file.managed:
        - source: salt://httpd/files/httpd.conf
        - name: /etc/httpd/conf/httpd.conf
    
      service.running:
        - name: httpd
        - enable: True
        - reload: True
        - watch:
          - file: apache-deploy

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### jinja模板 ###

*  Jinja是一种基于python的模板引擎，在SLS文件里可以直接使用jinja模板来做一些操作。
 *  通过jinja模板可以为不同服务器定义各自的变量。
 *  两种分隔符: \{% … %\} 和 \{ \{ … \}\}，前者用于执行诸如 for 循环 或赋值的语句，后者把表达式的结果打印到模板上。

#### Jinja模板使用方式 ####

/mnt/testfile:
      file.append:
        {
        % if grains['fqdn'] == 'server2' %}
        - text: server2
        {
        % elif grains['fqdn'] == 'server3' %}
        - text: server3
        {
        % endif %}

[root@server1 salt]# salt '*' state.sls test
    server2:
    ----------
              ID: /mnt/testfile
        Function: file.append
          Result: True
         Comment: Appended 1 lines
         Started: 09:43:12.537932
        Duration: 60.559 ms
         Changes:   
                  ----------
                  diff:
                      --- 
                      
                      +++ 
                      
                      @@ -0,0 +1 @@
                      
                      +server2
    
    Summary for server2
    ------------
    Succeeded: 1 (changed=1)
    Failed:    0
    ------------
    Total states run:     1
    Total run time:  60.559 ms
    server3:
    ----------
              ID: /mnt/testfile
        Function: file.append
          Result: True
         Comment: Appended 1 lines
         Started: 09:43:12.276150
        Duration: 55.225 ms
         Changes:   
                  ----------
                  diff:
                      --- 
                      
                      +++ 
                      
                      @@ -0,0 +1 @@
                      
                      +server3
    
    Summary for server3
    ------------
    Succeeded: 1 (changed=1)
    Failed:    0
    ------------
    Total states run:     1
    Total run time:  55.225 ms

#### Jinja在普通文件的使用 ####

39 # prevent Apache from glomming onto all bound IP addresses.
     40 #
     41 #Listen 12.34.56.78:80
     42 Listen {
        {
         port }}
     43

9   file.managed:
     10     - source: salt://httpd/files/httpd.conf
     11     - name: /etc/httpd/conf/httpd.conf
     12     - template: jinja
     13     - context:
     14       port: 8080

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#### 使用pillar和grains ####

/srv/salt/httpd/service.sls

file.managed:
        - source: salt://httpd/files/httpd.conf
        - name: /etc/httpd/conf/httpd.conf
        - template: jinja
        - context:
          port: {
        {
         pillar['port'] }}
          bind: {
        {
         grains['ipv4'][-1] }}

/srv/pillar/web/init.sls

{
        % if grains['fqdn'] == 'server3' %}
    package: nginx
    {
        % elif grains['fqdn'] == 'server2' %}
    package: httpd
    port: 8000
    {
        % endif %}

![在这里插入图片描述][2020082810270513.png_pic_cener]

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#### 导入变量 ####

/srv/salt/lib.sls

{
        % set port=8080 %}

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNDAyNQ_size_16_color_FFFFFF_t_70_pic_cnter 1]  
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可以得到一个结论：  
优先级 导入模板最高

### 部署keepalived ###

需要修改的文件  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzQxNDAyNQ_size_16_color_FFFFFF_t_70_pic_ceter 3]

[root@server1 srv]# cat salt/keepalived/init.sls 
    keepalived-deploy:
      pkg.installed:
        - name: keepalived
      
      file.managed:
        - source: salt://keepalived/files/keepalived.conf
        - name: /etc/keepalived/keepalived.conf
        - template: jinja
        - context:
          STATE: {
        {
         pillar['state']}}
          VRI: {
        {
         pillar['vri']}}
          PRI: {
        {
         pillar['pri']}}
          VIP: {
        {
         pillar['vip']}}
      
      service.running:
        - name: keepalived
        - enable: True
        - reload: True
        - watch:
          - file: keepalived-deploy

[root@server1 srv]# cat salt/keepalived/files/keepalived.conf 
    ! Configuration File for keepalived
    
    global_defs {
        
       notification_email {
        
       root@localhost   
    }
       notification_email_from keepalived@localhost
       smtp_server localhost
       smtp_connect_timeout 30
       router_id LVS_DEVEL
       vrrp_skip_check_adv_addr
       #vrrp_strict
       vrrp_garp_interval 0
       vrrp_gna_interval 0
    }
    
    vrrp_instance VI_1 {
        
        state {
        {
         STATE }}
        interface eth0
        virtual_router_id {
        {
         VRI }}
        priority {
        {
         PRI }}
        advert_int 1
        authentication {
        
            auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
        
        {
        {
         VIP }}  
      }
    }

[root@server1 srv]# cat pillar/kpa/init.sls 
    {
        % if grains['fqdn'] == 'server2' %}
    state: MASTER
    pri: 100
    {
        % elif grains['fqdn'] == 'server3'%}
    state: BACKUP
    pri: 50
    {
        % endif %}
    vri: 50
    vip: 172.25.254.250

[root@server1 srv]# cat pillar/top.sls 
    base:
      '*':
        - kpa

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