SaltStack安装Redis-第十篇

实验环境

node1  192.168.56.11   角色  salt-master

node2  192.168.56.12   角色  salt-minon

完成内容

Salt远程安装Redis服务

步骤

在前面的文章中已经搭建好了salt-master和saltminion环境

一，在prod目录下创建redis相关的目录，存放状态文件

[root@linux-node1 ~]# cd /srv/salt/prod/
[root@linux-node1 prod]# mkdir modules/redis -p
[root@linux-node1 prod]# tree
.
└── modules
    └── redis

二，进入redis目录创建redis基础状态文件，这里我们用简单的rpm包按照为例

[root@linux-node1 redis]# cat redis-install.sls
redis-install:
  pkg.installed:
    - name: redis

三，有时候我们修改redis的配置文件或创建集群

[root@linux-node1 prod]# pwd
/srv/salt/prod
[root@linux-node1 prod]# mkdir redis-cluster
[root@linux-node1 prod]# cd redis-cluster/
[root@linux-node1 redis-cluster]# vi redis-master.sls
[root@linux-node1 redis-cluster]# cat redis-master.sls
include:
  - modules.redis.redis-install

redis-master-config:
  file.managed:
    - name: /etc/redis.conf
    - source: salt://redis-cluster/files/redis-master.conf
    - user: root
    - group: root
    - mode: 644
    - template: jinja
    - defaults:
      REDIS_MEM: 1G

redis-master-service:
  service.running:
    - name: redis
    - enable: True
    - watch:
      - file: redis-master-config

四，按照redis取配置文件作为salt模板

[root@linux-node1 redis-cluster]# yum install redis
[root@linux-node1 redis-cluster]# cp /etc/redis.conf  /srv/salt/prod/redis-cluster/files/
[root@linux-node1 redis-cluster]# tree
.
├── files
│   └── redis.conf
└── redis-master.sls

五，重命名redis模板文件名

[root@linux-node1 files]# mv redis.conf redis-master.conf
[root@linux-node1 files]# pwd
/srv/salt/prod/redis-cluster/files

六，更改redis配置文件模板，bind也可以只监听内网端口

[root@linux-node1 files]# grep -E  'bind|daemonize|maxmemory' redis-master.conf  |grep -v ^#
bind 0.0.0.0
daemonize yes
maxmemory {{ REDIS_MEM }}

七，测试，因为是在prod目录下 需要添加 saltenv=prod环境变量

[root@linux-node1 redis-cluster]# salt 'linux-node2*' state.sls redis-cluster.redis-master test=True saltenv=prod
linux-node2.example.com:
----------
          ID: redis-install
    Function: pkg.installed
        Name: redis
      Result: None
     Comment: The following packages are set to be installed/updated: redis
     Started: ::55.034779
    Duration: 2514.889 ms
     Changes:
----------
          ID: redis-master-config
    Function: file.managed
        Name: /etc/redis.conf
      Result: None
     Comment: The file /etc/redis.conf is set to be changed
     Started: ::57.551713
    Duration: 27.659 ms
     Changes:
              ----------
              newfile:
                  /etc/redis.conf
----------
          ID: redis-master-service
    Function: service.running
        Name: redis
      Result: None
     Comment: Service is set to be started
     Started: ::57.637546
    Duration: 71.324 ms
     Changes:   

Summary
------------
Succeeded:  (unchanged=, changed=)
Failed:
------------
Total states run:     

八，执行redis状态模块

[root@linux-node1 redis-cluster]# salt 'linux-node2*' state.sls redis-cluster.redis-master  saltenv=prod
linux-node2.example.com:
----------
          ID: redis-install
    Function: pkg.installed
        Name: redis
      Result: True
     Comment: The following packages were installed/updated: redis
     Started: ::16.616612
    Duration: 15732.74 ms
     Changes:
              ----------
              jemalloc:
                  ----------
                  new:
                      3.6.-.el7
                  old:
              redis:
                  ----------
                  new:
                      3.2.-.el7
                  old:
----------
          ID: redis-master-config
    Function: file.managed
        Name: /etc/redis.conf
      Result: True
     Comment: File /etc/redis.conf updated
     Started: ::32.351877
    Duration: 45.19 ms
     Changes:
              ----------
              diff:
                  ---
                  +++
                  @@ -, +, @@
                   #
                   # Examples:
                   #
                  -# bind 192.168.1.100 10.0.0.1
                  +#bind 0.0.0.0
                   # bind 127.0.0.1 ::
                   #
                   # ~~~ WARNING ~~~ If the computer running Redis is directly exposed to the
                  @@ -, +, @@
                   # IF YOU ARE SURE YOU WANT YOUR INSTANCE TO LISTEN TO ALL THE INTERFACES
                   # JUST COMMENT THE FOLLOWING LINE.
                   # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                  -bind 127.0.0.1
                  +bind 0.0.0.0

                   # Protected mode is a layer of security protection, in order to avoid that
                   # Redis instances left open on the internet are accessed and exploited.
                  @@ -, +, @@

                   # By default Redis does not run as a daemon. Use 'yes' if you need it.
                   # Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
                  -daemonize no
                  +daemonize yes

                   # If you run Redis from upstart or systemd, Redis can interact with your
                   # supervision tree. Options:
                  @@ -, +, @@
                   # limit for maxmemory so that there is some free RAM on the system for slave
                   # output buffers (but this is not needed if the policy is 'noeviction').
                   #
                  -# maxmemory <bytes>
                  +maxmemory 1G

                   # MAXMEMORY POLICY: how Redis will select what to remove when maxmemory
                   # is reached. You can select among five behaviors:
              mode:

              user:
                  root
----------
          ID: redis-master-service
    Function: service.running
        Name: redis
      Result: True
     Comment: Service redis has been enabled, and is running
     Started: ::32.412154
    Duration: 453.972 ms
     Changes:
              ----------
              redis:
                  True

Summary
------------
Succeeded:  (changed=)
Failed:
------------
Total states run:     

salt 'linux-node2*' state.sls redis-cluster.redis-master saltenv=prod

九，登陆node2节点查看redis服务已经成功启动

[root@linux-node2 ~]# ps aux |grep redis
redis        0.3  0.3    ?        Ssl  :   : /usr/bin/redis-server 0.0.0.0:
root         0.0  0.0     pts/    S+   :   : grep --color=auto redis
[root@linux-node2 ~]# 

总结

1.生产环境我们的状态模块可以在prod下面，在执行的时候需要设置环境saltenv=prod（使用top.sls不需要设置环境变量）

2.记得使用test=True先测试

3.提前查清楚软件包和相关配置文件

4.当使用jinja模板管理时，可以不用登陆redis服务器就可以查看redis设置的最大内存

---

附 赵班长的 GitHub saltbook-code网址

https://github.com/unixhot/saltbook-code/tree/master