Ansible-playbook 自動化部署redis

摘要

    自動化部署已經很成熟並且很多企業都在使用，ansible作爲自動化運維工具的主力軍，今天就推薦大家使用ansible的playbook自動化部署redis

準備工作 

   1、ansible服務端：      192.168.0.33

   2、redis安裝服務器：  192.168.0.32

   3、redis安裝文件：     redis-5.0.7.tar.gz  

目錄規劃

 1、ansible服務端目錄：

   ansible\
├── install
│   ├── redis-5.0.7.tar.gz
├── redis
│   ├── intall_redis.yml
│   ├── README.txt
│   └── redis

2、redis安裝客戶端目錄：

  安裝目錄： /usr/local/redis

  安裝包存放目錄：/opt/redis/redis-5.0.7.tar.gz

  配置文件：/etc/redis/redis.conf

文件內容介紹

cat intall_redis.yml

---
- name: install redis
  gather_facts: False
  hosts: "{{ ip }}"
  user: root
  vars:
    - redis_port: "{{ port|default(6379) }}"
  tasks:
    - name: Create the dir
      file: path={{ item }} state=directory
      with_items:
        - /etc/redis/
        - /opt/redis/
    - name: get redis install package
      copy: src=/opt/ansible/install/redis-5.0.7.tar.gz dest=/opt/redis/redis-5.0.7.tar.gz
    - name: unarchive the redis-5.0.7.tar.gz
      unarchive: src=/opt/redis/redis-5.0.7.tar.gz dest=/opt/redis/ copy=no
    - name: install the redis-5.0.7.tar.gz
      shell: /opt/redis/redis-5.0.7 && make PREFIX=/usr/local/redis install
    - name: copy target redis.conf file
      shell: cp /opt/redis/redis-5.0.7/redis.conf /etc/redis/
    - name: copy redis command to system bin 
      shell: cd /usr/local/redis/bin && cp redis-benchmark redis-cli redis-server /usr/bin/
    - name: init the redis maintain script
      copy: src=/opt/ansible/redis/redis dest=/etc/init.d/redis mode=0755
    - name: Start the redis server
      shell: chkconfig --add redis
      ignore_errors: yes
    - name: add redis to chkconfig 
      shell: chkconfig --level 2345 redis on && /etc/init.d/redis start
      ignore_errors: yes

cat redis

#!/bin/bash
#chkconfig: 2345 80 90
# Simple Redis init.d script conceived to work on Linux systems
# as it does use of the /proc filesystem.

PATH=/usr/local/bin:/sbin:/usr/bin:/bin
REDISPORT=6379
EXEC=/usr/local/redis/bin/redis-server
REDIS_CLI=/usr/local/redis/bin/redis-cli
   
PIDFILE=/var/run/redis.pid
CONF="/etc/redis/redis.conf"
   
case "$1" in
    start)
        if [ -f $PIDFILE ]
        then
                echo "$PIDFILE exists, process is already running or crashed"
        else
                echo "Starting Redis server..."
                $EXEC $CONF
        fi
        if [ "$?"="0" ] 
        then
              echo "Redis is running..."
        fi
        ;;
    stop)
        if [ ! -f $PIDFILE ]
        then
                echo "$PIDFILE does not exist, process is not running"
        else
                PID=$(cat $PIDFILE)
                echo "Stopping ..."
                $REDIS_CLI -p $REDISPORT SHUTDOWN
                while [ -x ${PIDFILE} ]
               do
                    echo "Waiting for Redis to shutdown ..."
                    sleep 1
                done
                echo "Redis stopped"
        fi
        ;;
   restart|force-reload)
        ${0} stop
        ${0} start
        ;;
  *)
    echo "Usage: /etc/init.d/redis {start|stop|restart|force-reload}" >&2
        exit 1
esac

任務流程

playbook的任務流程大致爲：

 1、將redis-5.0.7.tar.gz安裝包及啓動文件redis複製到目標服務器

 2、編譯安裝redis

 3、將redis配置文件複製到指定目錄

 4、將redis相關命令設置爲系統全局命令

 5、將redis註冊爲系統服務且開機啓動

 6、啓動redis服務