[Ansible实战]-ansible部署Redis-5.x集群

 

0.剧本说明

自动安装部署redis-5.x集群
只是创建和启动，集群初始化命令需要手动执行

1.目录结构

[root@m01 ~]# tree /etc/ansible/roles/redis_cluster/
/etc/ansible/roles/redis_cluster/
├── files
│   ├── redis_6380
│   │   ├── conf
│   │   ├── logs
│   │   └── pid
│   ├── redis_6381
│   │   ├── conf
│   │   ├── logs
│   │   └── pid
│   └── redis_cmd
│       ├── redis-benchmark
│       ├── redis-check-aof
│       ├── redis-check-rdb
│       ├── redis-cli
│       └── redis-server
├── handlers
│   └── main.yaml
├── tasks
│   └── main.yaml
├── templates
│   ├── redis_6380.conf.j2
│   ├── redis_6381.conf.j2
│   ├── redis-master.service.j2
│   └── redis-slave.service.j2
└── vars

14 directories, 11 files

2.配置文件jinja模版

主节点配置模版

[root@m01 ~]# cat /etc/ansible/roles/redis_cluster/templates/redis_6380.conf.j2 
bind {{ ansible_facts.eth0.ipv4.address }}
port 6380
daemonize yes
pidfile "/opt/redis_6380/pid/redis_6380.pid"
logfile "/opt/redis_6380/logs/redis_6380.log"
dbfilename "redis_6380.rdb"
dir "/data/redis_6380/"
appendonly yes
appendfilename "redis.aof"
appendfsync everysec
cluster-enabled yes
cluster-config-file nodes_6380.conf
cluster-node-timeout 15000

从节点配置模版

[root@m01 ~]# cat /etc/ansible/roles/redis_cluster/templates/redis_6381.conf.j2  
bind {{ ansible_facts.eth0.ipv4.address }}
port 6381
daemonize yes
pidfile "/opt/redis_6381/pid/redis_6381.pid"
logfile "/opt/redis_6381/logs/redis_6381.log"
dbfilename "redis_6381.rdb"
dir "/data/redis_6381/"
appendonly yes
appendfilename "redis.aof"
appendfsync everysec
cluster-enabled yes
cluster-config-file nodes_6381.conf
cluster-node-timeout 15000

3.启动脚本

主节点启动脚本

[root@m01 ~]# cat /etc/ansible/roles/redis_cluster/templates/redis-master.service.j2 
[Unit]
Description=Redis persistent key-value database
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
ExecStart=/usr/local/bin/redis-server /opt/redis_6380/conf/redis_6380.conf --supervised systemd
ExecStop=/usr/local/bin/redis-cli -h {{ ansible_facts.eth0.ipv4.address }}  -p 6380 shutdown
Type=notify
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

[Install]
WantedBy=multi-user.target

从节点启动脚本

[root@m01 ~]# cat /etc/ansible/roles/redis_cluster/templates/redis-slave.service.j2 
[Unit]
Description=Redis persistent key-value database
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
ExecStart=/usr/local/bin/redis-server /opt/redis_6381/conf/redis_6381.conf --supervised systemd
ExecStop=/usr/local/bin/redis-cli -h {{ ansible_facts.eth0.ipv4.address }}  -p 6381 shutdown
Type=notify
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

[Install]
WantedBy=multi-user.target

4.tasks清单

[root@m01 ~]# cat /etc/ansible/roles/redis_cluster/tasks/main.yaml 
#01.创建用户组
- name: 01_create_group
  group:
    name: redis 
    gid: 777 

#02.创建用户
- name: 02_create_user
  user:
    name: redis 
    uid: 777 
    group: redis 
    shell: /sbin/nologin
    create_home: no

#03.拷贝执行文件
- name: 03_copy_cmd
  copy:
    src: redis_cmd/
    dest:  /usr/local/bin/
    mode: '0755'

#04.拷贝运行目录
- name: 04_mkdir_conf
  copy:
    src: "{{ item }}"
    dest: /opt/
    owner: redis
    group: redis
  loop:
    - redis_6380
    - redis_6381
    
#05.创建数据目录
- name: 05_mkdir_data
  file: 
    dest: "/data/{{ item }}"
    state: directory 
    owner: redis 
    group: redis 
  loop:
    - redis_6380 
    - redis_6381 

#06.拷贝配置文件模版
- name: 06_copy_conf
  template:
    src: "{{ item.src}}"
    dest: "{{ item.dest }}"
    backup: yes
  loop:
    - { src: 'redis_6380.conf.j2', dest: '/opt/redis_6380/conf/redis_6380.conf' }
    - { src: 'redis_6381.conf.j2', dest: '/opt/redis_6381/conf/redis_6381.conf' }
    - { src: 'redis-master.service.j2', dest: '/usr/lib/systemd/system/redis-master.service' }
    - { src: 'redis-slave.service.j2', dest: '/usr/lib/systemd/system/redis-slave.service' }
  notify:
    - restart redis-master
    - restart redis-slave 

#07.启动服务
- name: 07_start_redis
  systemd: 
    name: "{{ item }}" 
    state: started 
    daemon_reload: yes
  loop:
  - redis-master 
  - redis-slave

5.handles清单

[root@m01 ~]# cat /etc/ansible/roles/redis_cluster/handlers/main.yaml 
- name: restart redis-master 
  service: 
    name: redis-master 
    state: restarted

- name: restart redis-slave
  service: 
    name: redis-slave
    state: restarted

6.执行任务清单

[root@m01 ~]# cat /etc/ansible/redis_cluster.yaml 
- hosts: redis_cluster
  roles:
    - redis_cluster