ansible redis 模块 ansible安装redis集群

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mob64ca141275de 2024-06-04 21:53:44

文章标签 ansible redis 模块数据库 shell 运维 redis 文章分类 Redis 数据库

Ansible-playbook 部署redis主从一键部署

ansible-playbook redis目录树结构

[root@192 roles]# tree redis/
redis/
├── defaults
├── files
│   └── redis-3.2.5.tar.gz
├── handlers
│   └── main.yaml
├── meta
├── tasks
│   └── main.yaml
├── templates
│   └── redis.conf.j2
└── vars
    └── main.yaml

#首先这个tasks任务写的很乱,源码编译的这个启动脚本只有start和stop 两个参数，这个两个参数不是func函数类的，这块没办法做restart。当然也可以做，自己再重新搞个启动脚本，这块为了省事就用源码的脚本了。handlers是文件发生改变时触发重启。task里面注释的重启task，直接开启也可以的，两种方法都试过，完全ok。使用handlers就不需要注释那几行了。不使用handlers，直接把notify注释掉，start和stop开启就行。

[root@192 tasks]# cat main.yaml 
- name: Installredis base packages
  yum: name={{ item }} state=installed
  with_items:
    - gcc
    - make
- name: copy redis.tar.gz to remote server
  copy: src=redis-{{ redis_version }}.tar.gz dest=/usr/local/
- name: 解压redis
  shell: chdir=/usr/local/ tar zxf redis-{{ redis_version }}.tar.gz
- name: make install redis
  shell: cd /usr/local/redis-{{ redis_version }} && make PREFIX=/usr/local/redis install
- name: create redis init script
  copy: src=/usr/local/redis-{{ redis_version }}/utils/redis_init_script dest=/etc/init.d/redis mode=655
- name: 修改redis-server启动脚本参数路径
  shell: sed -i 's/^EXEC.*/EXEC=\/usr\/local\/redis\/bin\/redis-server/g' /etc/init.d/redis
- name: 替换redis启动脚本CLIEXEC参数
  shell: sed -i 's/^CLIEXEC.*/CLIEXEC=\/usr\/local\/redis\/bin\/redis-cli/g' /etc/init.d/redis
- name: 添加环境变量文件
  shell: /bin/echo {{ item }} >> /etc/profile && source /etc/profile
  with_items:
    - export PATH=\$PATH:/usr/local/redis/bin
- name: 创建redis配置文件路径
  file: path=/etc/redis state=directory mode=755 owner=root group=root
- name: copy redis配置文件到远程主机
  template: src=redis.conf.j2 dest=/etc/redis/{{ port }}.conf
  notify:
     - stop redis
     - start redis
#- name: start redis service
#  shell: service redis start
  #when: ansible_default_ipv4.address == "{{ slave_ip }}"
- name: 替换master_ip
  shell: sed -i '/^# slaveof.*/a\slaveof {{ master_ip }} {{ port }}' /etc/redis/{{ port }}.conf
  when: ansible_default_ipv4.address == "{{ slave_ip }}"
  notify:
     - stop redis
     - start redis
#- name: stop redis service
#  shell: service redis stop
#- name: reload redis service
#  shell: service redis start

#handlers 文件内容：

[root@192 tasks]# cat ../handlers/main.yaml 
- name: stop redis
  shell: service redis stop
- name: start redis
  shell: service redis start

#vars目录变量文件：

[root@192 vars]# cat main.yaml 
port: 6379
redis_version: 3.2.5
slave_ip: 192.168.121.129
master_ip: 192.168.121.128

#模板文件就是一个redis.conf文件，这块只改了三个参数。

第一个：后台启动

[root@192 templates]# grep daemonize redis.conf.j2 
# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
daemonize yes
# When the server runs non daemonized, no pid file is created if none is
# specified in the configuration. When the server is daemonized, the pid file
# output for logging but daemonize, logs will be sent to /dev/null

第二个：主从的ip

#这个ip必须要改，不然的话主从会异步的。master_link_status:down 会是这个状态，下午我怕错是发现主从一直异步，telnet发现端口问题。

[root@192 templates]# grep ansible redis.conf.j2 
bind {{ ansible_default_ipv4.address }}

第三个参数：

#日志必须的，之前我没打日志，主从异步也不知道怎么回事，开了日志才发现端口被拒。

[root@192 templates]# grep logfile redis.conf.j2 
logfile "/usr/local/redis/redis.log"

其他参数可以优化，根据自己的需要做一个模板，我这只是练习玩。

#运行ansible-playbook 建议加个-v参数，可以看到具体的运行操作，可以看看运行是否符合自己的期望。

ansible-playbook 运行过程：

[root@192 ansible]# ansible-playbook redis.yml 
PLAY [test] ********************************************************************
TASK [setup] *******************************************************************
ok: [192.168.121.129]
ok: [192.168.121.128]
TASK [redis : redis base packages] *********************************************
ok: [192.168.121.129] => (item=[u'gcc', u'make'])
ok: [192.168.121.128] => (item=[u'gcc', u'make'])
TASK [redis : copy redis.tar.gz to remote pc] **********************************
changed: [192.168.121.128]
changed: [192.168.121.129]
TASK [redis : 解压redis] *********************************************************
changed: [192.168.121.129]
 [WARNING]: Consider using unarchive module rather than running tar
changed: [192.168.121.128]
TASK [redis : make  install redis] *********************************************
changed: [192.168.121.129]
changed: [192.168.121.128]
TASK [redis : create redis init script] ****************************************
changed: [192.168.121.128]
changed: [192.168.121.129]
TASK [redis : redis init script cover] *****************************************
changed: [192.168.121.129]
 [WARNING]: Consider using template or lineinfile module rather than running sed
changed: [192.168.121.128]
TASK [redis : 替换redis启动脚本CLIEXEC参数] ********************************************
changed: [192.168.121.128]
changed: [192.168.121.129]
TASK [redis : /etc/profile] ****************************************************
changed: [192.168.121.129] => (item=export PATH=\$PATH:/usr/local/redis/bin)
changed: [192.168.121.128] => (item=export PATH=\$PATH:/usr/local/redis/bin)
TASK [redis : create redis config directory] ***********************************
changed: [192.168.121.129]
changed: [192.168.121.128]
TASK [redis : redis template] **************************************************
changed: [192.168.121.129]
changed: [192.168.121.128]
TASK [redis : start redis service] *********************************************
skipping: [192.168.121.128]
changed: [192.168.121.129]
 [WARNING]: Consider using service module rather than running service
TASK [redis : 替换master_ip] *****************************************************
changed: [192.168.121.129]
changed: [192.168.121.128]
TASK [redis : stop redis service] **********************************************
changed: [192.168.121.128]
changed: [192.168.121.129]
TASK [redis : reload redis service] ********************************************
changed: [192.168.121.129]
changed: [192.168.121.128]
PLAY RECAP *********************************************************************
192.168.121.128            : ok=14   changed=12   unreachable=0    failed=0   
192.168.121.129            : ok=15   changed=13   unreachable=0    failed=0

#192.168.121.129从库的状态，主库set 一个值，从库也是可以get到的。

127.0.0.1:6379> info Replication
# Replication
role:slave
master_host:192.168.121.128
master_port:6379
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_repl_offset:323
slave_priority:100
slave_read_only:1
connected_slaves:0
master_repl_offset:0
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0
127.0.0.1:6379> GET name
"meng"

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