docker

关注公众号 jb51net

关闭
首页 > 网站技巧 > 服务器 > 云和虚拟化 > docker > Docker中redis集群部署

Docker中redis集群部署实战

作者:甜点cc

这篇文章主要介绍了Docker中redis集群部署实战的相关资料,需要的朋友可以参考下

前面已经简单熟悉过redis的下载安装使用,今天接着部署redis集群(cluster),简单体会一下redis集群的高可用特性。

环境准备

Redis是C语言开发,安装Redis需要先将Redis的源码进行编译,编译依赖gcc环境

安装gcc-c++

yum install gcc-c++

查看版本

[root@--- redis]# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) 
[root@--- redis]# 

Redis的四种模式

创建redis网卡

[root@--- ~]# docker network create redis --subnet 172.38.0.0/16
0350d84612bef09bc32b39f15ac6b608dae17cbd75d04b282c0bd37c0283bb7c
[root@iZm5e23n3ueobwkjtfartxZ ~]# docker network ls
NETWORK ID     NAME           DRIVER    SCOPE
feafa30d4051   bridge         bridge    local
e8bf4fced9e2   host           host      local
0096a971fd2c   mynet          bridge    local
6263db0933b9   none           null      local
0350d84612be   redis          bridge    local
799426d70aa2   test-network   bridge    local
[root@--- ~]# 

创建6个redis服务

通过编写脚本创建6个redis服务

/var目录下创建脚本文件create_redis_script.sh

touch create_redis_script.sh

编写脚本内容

vim create_redis_script.sh,写入下面的内容

for port in $(seq	1 6); \
do \
mkdir -p /var/redisNode/node-${port}/conf
touch /var/redisNode/node-${port}/conf/redis.conf
cat << EOF >/var/redisNode/node-${port}/conf/redis.conf
port 6379
bind 0.0.0.0
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
cluster-announce-ip 172.38.0.1${port}
cluster-announce-port 6379
cluster-announce-bus-port 16379
appendonly yes
#daemonize yes
EOF
done

查看脚本文件

cat create_redis_script.sh

赋予create_redis_script.sh文件可执行权限

[root@--- ~]# chmod o+x create_redis_script.sh

执行脚本,创建redis服务

./create_redis_script.sh

查看redis节点

[root@--- redisNode]# pwd
/var/redisNode
[root@--- redisNode]# ls
node-1  node-2  node-3  node-4  node-5  node-6
[root@--- redisNode]#

查看redis.conf配置文件

启动redis服务

启动方式一(不推荐):

一个一个启动

启动第一个redis节点

docker run -p 6371:6379 -p 16371:16379 --name redis-1 \
-v /var/redisNode/node-1/data:/data \
-v /var/redisNode/node-1/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.11 redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf

如上,类似的,递增ip、port和name,启动其它五个redis节点,太麻烦了,可以通过编写脚本来一次启动6个服务

启动方式二(推荐):

编写启动脚本,6个全部启动

创建start_redis_script.sh文件

touch start_redis_script.sh

编写脚本内容

vim start_redis_script.sh,写入下面的内容

for port in $(seq	1 6); \
do \
echo ${port}
docker run -p 637${port}:6379 -p 1637${port}:16379 --name redis-${port} \
-v /var/redisNode/node-${port}/data:/data \
-v /var/redisNode/node-${port}/conf/redis.conf:/etc/redis/redis.conf \
-d --net redis --ip 172.38.0.1${port} redis:5.0.9-alpine3.11 redis-server /etc/redis/redis.conf; \
done

赋予start_redis_script.sh文件可执行权限

[root@--- ~]# chmod o+x start_redis_script.sh

执行脚本,启动redis容器服务

./start_redis_script.sh

查看redis容器

[root@--- var]# docker ps
CONTAINER ID   IMAGE                    COMMAND                  CREATED              STATUS              PORTS                                              NAMES
0d3c18b61098   redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   2 seconds ago        Up 1 second         0.0.0.0:6376-&gt;6379/tcp, 0.0.0.0:16376-&gt;16379/tcp   redis-6
ee896fb093da   redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   13 seconds ago       Up 12 seconds       0.0.0.0:6375-&gt;6379/tcp, 0.0.0.0:16375-&gt;16379/tcp   redis-5
a83bb7b16dff   redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   48 seconds ago       Up 47 seconds       0.0.0.0:6374-&gt;6379/tcp, 0.0.0.0:16374-&gt;16379/tcp   redis-4
ffe4c9619bed   redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   58 seconds ago       Up 57 seconds       0.0.0.0:6373-&gt;6379/tcp, 0.0.0.0:16373-&gt;16379/tcp   redis-3
a316a31e273f   redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   About a minute ago   Up About a minute   0.0.0.0:6372-&gt;6379/tcp, 0.0.0.0:16372-&gt;16379/tcp   redis-2
71c072f57c29   redis:5.0.9-alpine3.11   "docker-entrypoint.s…"   9 minutes ago        Up 9 minutes        0.0.0.0:6371-&gt;6379/tcp, 0.0.0.0:16371-&gt;16379/tcp   redis-1
[root@--- var]# 

创建集群

进入任意一个 Redis 实例

进入redis-1容器

docker exec -it redis-1 /bin/sh

创建集群主节点

# redis-1 容器内
/data # redis-cli --cluster create 172.38.0.11:6379 172.38.0.12:6379 172.38.0.13:6379 172.38.0.14:6379 172.38.0.15:6379 172.38.0.16:6379 --cluster-replicas 1

测试连接集群

连接集群 -c

# redis-1 容器内
/data # redis-cli -c
127.0.0.1:6379>

查看集群信息 cluster info

127.0.0.1:6379> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:292
cluster_stats_messages_pong_sent:307
cluster_stats_messages_sent:599
cluster_stats_messages_ping_received:302
cluster_stats_messages_pong_received:292
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:599
127.0.0.1:6379>

查看节点信息 cluster nodes

127.0.0.1:6379> cluster nodes
b3f737d0d77b823794087011f1501fd43a2ea316 172.38.0.12:6379@16379 master - 0 1633332452560 2 connected 5461-10922
506ff2bf1020d468e7d7a81ddbfb616a7e9b7d96 172.38.0.13:6379@16379 master - 0 1633332453000 3 connected 10923-16383
7f57f8a01493fa9e46e24ad8a9e46995634f7442 172.38.0.15:6379@16379 slave 70ebdca0264c079bb2c33452e6388d37706da282 0 1633332453000 5 connected
70ebdca0264c079bb2c33452e6388d37706da282 172.38.0.11:6379@16379 myself,master - 0 1633332452000 1 connected 0-5460
f839b6924977e99d3b74324f2ef70b3678e1a257 172.38.0.14:6379@16379 slave 506ff2bf1020d468e7d7a81ddbfb616a7e9b7d96 0 1633332453762 4 connected
bbc4dd0639b90e9ddfb5cef278be04a24276cbdb 172.38.0.16:6379@16379 slave b3f737d0d77b823794087011f1501fd43a2ea316 0 1633332453000 6 connected
127.0.0.1:6379> 

测试主从节点替换

验证高可用

set一个值,然后停掉对应的服务,再次get,验证是否可以得到值

set值

127.0.0.1:6379&gt; set a b
-&gt; Redirected to slot [15495] located at 172.38.0.13:6379
OK
172.38.0.13:6379&gt;

发现a值设置在了172.38.0.13容器上,然后我们试着去停掉redis-3容器的服务,然后再次get,看一下结果

get值

172.38.0.13:6379&gt; get a
"b"
172.38.0.13:6379&gt;

停止redis-3容器里的redis服务

docker stop redis-3

再次取值

172.38.0.13:6379&gt; get a
Could not connect to Redis at 172.38.0.13:6379: Host is unreachable
(34.04s)
not connected&gt; exit
# 重连集群
/data # redis-cli -c
127.0.0.1:6379&gt; get a
-&gt; Redirected to slot [15495] located at 172.38.0.14:6379
"b"
172.38.0.14:6379&gt; 

发现a值被存储到了172.38.0.14机器上,172.38.0.14172.38.0.13的从节点,当主节点172.38.0.13发生故障时,自动替换到172.38.0.13,这就是高可用

查看redis节点服务信息

发现172.38.0.13节点fail172.38.0.14变成master

docker搭建redis集群完成🎈🎈

到此这篇关于Docker中redis集群部署实战的文章就介绍到这了,更多相关Docker中redis集群部署内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

您可能感兴趣的文章:
阅读全文