运维自动化之ansible playbook结合docker安装redis主从

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运维自动化之ansible playbook结合docker安装redis主从

技术小胖子 2017-11-14 16:22:00 浏览1137
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上次给大家介绍了ansible结合docker安装smokeping(地址http://dl528888.blog.51cto.com/2382721/1538444),现在在介绍一下ansible结合docker安装redis主从(redis版本是2.6.17)。  

目前ansible使用的人比较多,docker也最近比较流行,而且做测试的话,ansible+docker是个很好的组合。本文主要是介绍如何使用ansible的playbook安装redis主从,可以自动的做好主从,这样节省安装时间、减少问题产生。

docker版本

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09:49:09 # docker version
Client version: 0.11.1
Client API version: 1.11
Go version (client): go1.2.1
Git commit (client): fb99f99/0.11.1
Server version: 0.11.1
Server API version: 1.11
Git commit (server): fb99f99/0.11.1
Go version (server): go1.2.1
Last stable version: 1.1.2, please update docker

ansible版本

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09:51:55 # ansible --version
ansible 1.4.3

1、查看已有的docker镜像

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09:39:26 # docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
ubuntu              3.0                 6cee55276528        9 weeks ago         369.8 MB
centos5             3.0                 e08d23b09189        9 weeks ago         840.9 MB
centos6             3.0                 e94a3b24a19b        9 weeks ago         415.9 MB

2、查看当前运行的docker容器

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09:39:47 # docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                   NAMES
846efb9e4d7a        ubuntu:3.0          /usr/sbin/sshd -D   2 weeks ago         Up 6 days           0.0.0.0:49167->22/tcp   ubuntu-test1        
b9a9e6f2caed        centos6:3.0         /usr/sbin/sshd -D   3 weeks ago         Up 6 days           0.0.0.0:49166->22/tcp   zabbix-server       
978fff134b18        centos6:3.0         /usr/sbin/sshd -D   5 weeks ago         Up 6 days           0.0.0.0:49165->22/tcp   centos6-test5       
root@ip-10-10-10-10:/etc/ansible/roles/redis_install/templates

3、加载测试容器

由于是做redis主从,所以需要2个容器

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09:39:50 # time  docker inspect $(docker run -d -p 22  --name="redis-master" centos6:3.0 /usr/sbin/sshd -D)|grep -i address|awk -F '"' '{print $4}'
172.17.0.5
 
real    0m6.369s
user    0m0.036s
sys 0m0.049s
root@ip-10-10-10-10:/etc/ansible/roles/redis_install/templates
09:40:25 # time  docker inspect $(docker run -d -p 22  --name="redis-slave" centos6:3.0 /usr/sbin/sshd -D)|grep -i address|awk -F '"' '{print $4}'
172.17.0.6
 
real    0m12.567s
user    0m0.047s
sys 0m0.060s

然后把新容器的ip加入到ansible的hosts里

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root@ip-10-10-10-10:/etc/ansible/roles/redis_install/templates
09:40:46 # echo "172.17.0.5">>/etc/ansible/hosts
root@ip-10-10-10-10:/etc/ansible/roles/redis_install/templates
09:40:58 # echo "172.17.0.6">>/etc/ansible/hosts
root@ip-10-10-10-10:/etc/ansible/roles/redis_install/templates

4、ansible安装redis的信息

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09:52:11 # cat /etc/ansible/roles/redis_install/vars/main.yml 
redis_dir: /data
redis_version: 2.6.17
redis_port: 6379
redis_conf_dir: /data/redis-2.6.17/conf
redis_db_dir: /data/redis-2.6.17/db
redis_log_dir: /data/redis-2.6.17/log

5、下面是redis的playbook结构

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09:55:12 # tree /etc/ansible/roles/redis_install /etc/ansible/roles/redis_delete
/etc/ansible/roles/redis_install
├── files
│   └── redis-2.6.17.tar.gz
├── handlers
├── meta
│   └── main.yml
├── tasks
│   ├── copy.yml
│   ├── delete.yml
│   ├── install.yml
│   └── main.yml
├── templates
│   └── redis.conf
└── vars
    └── main.yml
/etc/ansible/roles/redis_delete
├── files
├── handlers
├── meta
│   └── main.yml
├── tasks
│   ├── delete.yml
│   └── main.yml
├── templates
│   └── delete_redis.sh
└── vars
    └── main.yml
 
12 directories, 13 files

6、playbook安装redis的内容是

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09:57:09 # cat redis_install.yml 
---
- hosts: "`host`"
  remote_user: "`user`"
  gather_facts: True
  roles:
    - common
    - redis_install

7、playbook删除redis的内容是

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09:57:31 # cat redis_delete.yml 
---
- hosts: "`host`"
  remote_user: "`user`"
  gather_facts: True
  roles:
    - redis_delete

下面是安装redis主从

8、安装redis master

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09:43:11 # time ansible-playbook redis_install.yml --extra-vars "host=172.17.0.5 user=root" -k
SSH password: 
 
PLAY [172.17.0.5] ************************************************************* 
 
GATHERING FACTS *************************************************************** 
ok: [172.17.0.5]
 
TASK: [common | Install initializtion require software] *********************** 
changed: [172.17.0.5]
 
TASK: [redis_install | Copy Redis Software To Redhat Client] ****************** 
ok: [172.17.0.5]
 
TASK: [redis_install | Create Redis Install Dir] ****************************** 
ok: [172.17.0.5]
 
TASK: [redis_install | Uncompression Redis Software To Redhat Client] ********* 
changed: [172.17.0.5]
 
TASK: [redis_install | Copy Redis Config To Redhat Client] ******************** 
changed: [172.17.0.5]
 
TASK: [redis_install | Create Soft Link In Redhat Client] ********************* 
changed: [172.17.0.5] => (item=redis-cli)
changed: [172.17.0.5] => (item=redis-server)
 
TASK: [redis_install | Check Boot Start In Redhat Client] ********************* 
failed: [172.17.0.5] => {"changed"true"cmd""grep -c '/usr/bin/redis-server /data/redis-2.6.17/conf/redis_6379.conf' /etc/rc.local ""delta""0:00:00.007160""end""2014-08-13 09:45:18.660617""item""""rc": 1, "start""2014-08-13 09:45:18.653457"}
stdout: 0
...ignoring
 
TASK: [redis_install | Add Boot Start In Redhat Client] *********************** 
changed: [172.17.0.5]
 
TASK: [redis_install | Start Redis Service In Redhat Client] ****************** 
changed: [172.17.0.5]
 
TASK: [redis_install | Delete Redis compression Software In Redhat Client] **** 
changed: [172.17.0.5]
 
PLAY RECAP ******************************************************************** 
172.17.0.5                 : ok=11   changed=8    unreachable=0    failed=0   
 
 
real    0m12.757s
user    0m3.453s
sys 0m0.497s

9、查看redis master安装情况

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09:48:39 # ssh 172.17.0.5
root@172.17.0.5's password: 
Last login: Wed Aug 13 09:45:28 2014 from 172.17.42.1
root@06762530db8c:~
09:48:43 # ps -ef|grep redis
root       294     1  0 09:45 ?        00:00:00 /usr/bin/redis-server /data/redis-2.6.17/conf/redis_6379.conf
root       343   329  0 09:48 pts/0    00:00:00 grep redis
root@06762530db8c:~
09:48:46 # cat /etc/rc.local 
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
 
touch /var/lock/subsys/local
/usr/bin/redis-server /data/redis-2.6.17/conf/redis_6379.conf
root@06762530db8c:~
09:48:52 # redis-cli -h 172.17.0.5 -p 6379
redis 172.17.0.5:6379> keys *
(empty list or set)
redis 172.17.0.5:6379>

10、安装redis slave

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09:45:20 # time ansible-playbook redis_install.yml --extra-vars "host=172.17.0.6 user=root redis_master_ip=172.17.0.5 redis_master_port=6379" -k
SSH password: 
 
PLAY [172.17.0.6] ************************************************************* 
 
GATHERING FACTS *************************************************************** 
ok: [172.17.0.6]
 
TASK: [common | Install initializtion require software] *********************** 
changed: [172.17.0.6]
 
TASK: [redis_install | Copy Redis Software To Redhat Client] ****************** 
changed: [172.17.0.6]
 
TASK: [redis_install | Create Redis Install Dir] ****************************** 
ok: [172.17.0.6]
 
TASK: [redis_install | Uncompression Redis Software To Redhat Client] ********* 
changed: [172.17.0.6]
 
TASK: [redis_install | Copy Redis Config To Redhat Client] ******************** 
changed: [172.17.0.6]
 
TASK: [redis_install | Create Soft Link In Redhat Client] ********************* 
changed: [172.17.0.6] => (item=redis-cli)
changed: [172.17.0.6] => (item=redis-server)
 
TASK: [redis_install | Check Boot Start In Redhat Client] ********************* 
failed: [172.17.0.6] => {"changed"true"cmd""grep -c '/usr/bin/redis-server /data/redis-2.6.17/conf/redis_6379.conf' /etc/rc.local ""delta""0:00:00.006751""end""2014-08-13 09:49:07.569522""item""""rc": 1, "start""2014-08-13 09:49:07.562771"}
stdout: 0
...ignoring
 
TASK: [redis_install | Add Boot Start In Redhat Client] *********************** 
changed: [172.17.0.6]
 
TASK: [redis_install | Start Redis Service In Redhat Client] ****************** 
changed: [172.17.0.6]
 
TASK: [redis_install | Delete Redis compression Software In Redhat Client] **** 
changed: [172.17.0.6]
 
PLAY RECAP ******************************************************************** 
172.17.0.6                 : ok=11   changed=9    unreachable=0    failed=0   
 
 
real    1m48.579s
user    0m6.781s
sys 0m0.654s

11、查看redis slave安装情况

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09:59:24 # ssh 172.17.0.6
root@172.17.0.6's password: 
root@dfec766fbaa7:~
09:59:28 # ll
total 0
root@dfec766fbaa7:~
09:59:31 # ps -ef|grep redis
root       197     1  0 09:49 ?        00:00:00 /usr/bin/redis-server /data/redis-2.6.17/conf/redis_6379.conf
root       227   212  0 09:59 pts/0    00:00:00 grep redis
09:59:49 # grep slave /data/redis-2.6.17/conf/redis_6379.conf |egrep -v "^#"
slaveof 172.17.0.5 6379
slave-serve-stale-data yes
slave-read-only yes
slave-priority 100
client-output-buffer-limit slave 256mb 64mb 60
root@dfec766fbaa7:~
10:00:09 # redis-cli -h 172.17.0.6 -p 6379
redis 172.17.0.6:6379> keys *
(empty list or set)
redis 172.17.0.6:6379> info
# Server
redis_version:2.6.17
redis_git_sha1:00000000
redis_git_dirty:0
redis_mode:standalone
os:Linux 2.6.32-431.17.1.el6.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
gcc_version:4.4.7
process_id:197
run_id:81207df2727abe534ae606afc0cb80016f75a422
tcp_port:6379
uptime_in_seconds:685
uptime_in_days:0
hz:10
lru_clock:280339
 
# Clients
connected_clients:2
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0
 
# Memory
used_memory:878072
used_memory_human:857.49K
used_memory_rss:7569408
used_memory_peak:877280
used_memory_peak_human:856.72K
used_memory_lua:31744
mem_fragmentation_ratio:8.62
mem_allocator:jemalloc-3.2.0
 
# Persistence
loading:0
rdb_changes_since_last_save:0
rdb_bgsave_in_progress:0
rdb_last_save_time:1407894548
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:-1
rdb_current_bgsave_time_sec:-1
aof_enabled:0
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:-1
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok
 
# Stats
total_connections_received:1
total_commands_processed:70
instantaneous_ops_per_sec:0
rejected_connections:0
expired_keys:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:0
 
# Replication
role:slave
master_host:172.17.0.5
master_port:6379
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_priority:100
slave_read_only:1
connected_slaves:0
 
# CPU
used_cpu_sys:0.24
used_cpu_user:0.10
used_cpu_sys_children:0.00
used_cpu_user_children:0.00
 
# Keyspace

可以从上面的Replication里看到主从做好了,信息如下图

wKiom1Pqx4KDiC_HAACeVhOhnrs653.jpg

然后去redis master里查看主从信息

wKioL1PqyL6j-zioAAA07Gk2lK4052.jpg

12、redis 主从测试

A.redis master插入key

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redis 172.17.0.5:6379> set master 1
OK
redis 172.17.0.5:6379> set slave 0
OK
redis 172.17.0.5:6379> get master
"1"
redis 172.17.0.5:6379> get slave
"0"

B.redis slave读取key

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redis 172.17.0.6:6379> keys *
1) "master"
2) "slave"
redis 172.17.0.6:6379> get master
"1"
redis 172.17.0.6:6379> get slave
"0"

可以看到主从建立完成

下面是redis slave的日志情况

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10:08:04 # cat /data/redis-2.6.17/log/redis_6379.log 
                _._                                                  
           _.-``__ ''-._                                             
      _.-``    `.  `_.  ''-._           Redis 2.6.17 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._                                   
 (    '      ,       .-`  | `,    )     Running in stand alone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 197
  `-._    `-._  `-./  _.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |           http://redis.io        
  `-._    `-._`-.__.-'_.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |                                  
  `-._    `-._`-.__.-'_.-'    _.-'                                   
      `-._    `-.__.-'    _.-'                                       
          `-._        _.-'                                           
              `-.__.-'                                               
 
[197] 13 Aug 09:49:08.878 # Server started, Redis version 2.6.17
[197] 13 Aug 09:49:08.879 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
[197] 13 Aug 09:49:08.879 * The server is now ready to accept connections on port 6379
[197] 13 Aug 09:49:09.879 * Connecting to MASTER 172.17.0.5:6379
[197] 13 Aug 09:49:09.879 * MASTER <-> SLAVE sync started
[197] 13 Aug 09:49:09.881 * Non blocking connect for SYNC fired the event.
[197] 13 Aug 09:49:09.881 * Master replied to PING, replication can continue...
[197] 13 Aug 09:49:10.035 * MASTER <-> SLAVE sync: receiving 18 bytes from master
[197] 13 Aug 09:49:10.035 * MASTER <-> SLAVE sync: Loading DB in memory
[197] 13 Aug 09:49:10.035 * MASTER <-> SLAVE sync: Finished with success
[197] 13 Aug 10:04:56.980 * 1 changes in 900 seconds. Saving...
[197] 13 Aug 10:04:56.982 * Background saving started by pid 233
[233] 13 Aug 10:04:57.226 * DB saved on disk
[233] 13 Aug 10:04:57.227 * RDB: 6 MB of memory used by copy-on-write
[197] 13 Aug 10:04:57.293 * Background saving terminated with success

13、删除redis安装

无论redis主从,删除都是一样的命令

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09:57:32 # time ansible-playbook redis_delete.yml --extra-vars "host=172.17.0.5 user=root" -k
SSH password: 
 
PLAY [172.17.0.5] ************************************************************* 
 
GATHERING FACTS *************************************************************** 
ok: [172.17.0.5]
 
TASK: [redis_delete | Stop Redis Service In Redhat Client] ******************** 
changed: [172.17.0.5]
 
TASK: [redis_delete | Delete Redis Soft Line In Redhat Client] **************** 
changed: [172.17.0.5] => (item=redis-cli)
changed: [172.17.0.5] => (item=redis-server)
 
TASK: [redis_delete | Delete Redis Dir In Redhat Client] ********************** 
changed: [172.17.0.5]
 
TASK: [redis_delete | Delete Boot Start In Redhat Client] ********************* 
changed: [172.17.0.5]
 
PLAY RECAP ******************************************************************** 
172.17.0.5                 : ok=5    changed=4    unreachable=0    failed=0   
 
 
real    0m6.929s
user    0m1.942s
sys 0m0.250s
root@ip-10-10-10-10:/etc/ansible
10:09:18 # time ansible-playbook redis_delete.yml --extra-vars "host=172.17.0.6 user=root" -k
SSH password: 
 
PLAY [172.17.0.6] ************************************************************* 
 
GATHERING FACTS *************************************************************** 
ok: [172.17.0.6]
 
TASK: [redis_delete | Stop Redis Service In Redhat Client] ******************** 
changed: [172.17.0.6]
 
TASK: [redis_delete | Delete Redis Soft Line In Redhat Client] **************** 
changed: [172.17.0.6] => (item=redis-cli)
changed: [172.17.0.6] => (item=redis-server)
 
TASK: [redis_delete | Delete Redis Dir In Redhat Client] ********************** 
changed: [172.17.0.6]
 
TASK: [redis_delete | Delete Boot Start In Redhat Client] ********************* 
changed: [172.17.0.6]
 
PLAY RECAP ******************************************************************** 
172.17.0.6                 : ok=5    changed=4    unreachable=0    failed=0   
 
 
real    0m5.897s
user    0m1.726s
sys 0m0.258s

15、删除后测试

A.redis master上

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10:09:55 # ifconfig
eth0      Link encap:Ethernet  HWaddr C6:3A:D2:D9:DD:D9  
          inet addr:172.17.0.5  Bcast:0.0.0.0  Mask:255.255.0.0
          inet6 addr: fe80::c43a:d2ff:fed9:ddd9/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:13236 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12843 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:26106313 (24.8 MiB)  TX bytes:906412 (885.1 KiB)
 
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:196 errors:0 dropped:0 overruns:0 frame:0
          TX packets:196 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:9665 (9.4 KiB)  TX bytes:9665 (9.4 KiB)
 
root@06762530db8c:~
10:09:56 # ps -ef|grep redis
root       431   329  0 10:09 pts/0    00:00:00 grep redis
root@06762530db8c:~
10:09:59 # cat /etc/rc.local 
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
 
touch /var/lock/subsys/local
root@06762530db8c:~
10:10:01 # ll /data/
total 4
drwxr-xr-x 2 root root 4096 Jun  5 10:21 soft
root@06762530db8c:~

B. redis slave上

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10:08:09 # ifconfig
eth0      Link encap:Ethernet  HWaddr BE:97:0C:B2:02:D9  
          inet addr:172.17.0.6  Bcast:0.0.0.0  Mask:255.255.0.0
          inet6 addr: fe80::bc97:cff:feb2:2d9/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:13062 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12704 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:25967216 (24.7 MiB)  TX bytes:842881 (823.1 KiB)
 
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:86 errors:0 dropped:0 overruns:0 frame:0
          TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:5288 (5.1 KiB)  TX bytes:5288 (5.1 KiB)
 
root@dfec766fbaa7:~
10:10:32 # ps -ef|grep redis
root       319   212  0 10:10 pts/0    00:00:00 grep redis
root@dfec766fbaa7:~
10:10:37 # cat /etc/rc.local 
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
 
touch /var/lock/subsys/local
root@dfec766fbaa7:~
10:10:39 # ll /data/
total 4
drwxr-xr-x 2 root root 4096 Jun  5 10:21 soft
root@dfec766fbaa7:~

如果大家想使用我的例子,可以从github里下载(地址是https://github.com/dl528888/ansible-examples/tree/master/redis_install),然后放到/etc/ansible目录里,下面是内容

wKiom1Pqyn_hH1XkAAGW3RUpfjs016.jpg





 本文转自 reinxu 51CTO博客,原文链接:http://blog.51cto.com/dl528888/1539251,如需转载请自行联系原作者



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