docker安装redis挂载容器卷同时开启持久化

说明：centOS操作系统，操作系统已安装过redis，端口6379已被占用。容器将会使用6380端口。本次操作为了实例化redis数据，并挂载到宿主机，防止容器被删除导致的数据丢失！

一、安装

1.搜索redis容器镜像并拉取容器镜像

[root@localhost]# docker search --limit 10 redis
[root@localhost]# docker pull redis

2.在宿主机本地创建redis存储配置文件和数据的目录，我这里创建/docker/redis下

[root@localhost redis]# pwd
/docker/redis

3.配置文件

复制原有redis.conf到/docker/redis/目录下

修改配置（最重要主要4项：修改后台运行默认为no、端口、存放位置、开启持久化）：

requirepass 123
maxclients 10000

#如果要外网访问，请注释掉下面，或者修改为0.0.0.0，保险起见，也可以把protected-mode设置为no
bind 0.0.0.0

protected-mode no

#注意修改这里端口，根据你实际暴露端口情况配置
port 6380

tcp-backlog 511
timeout 0
tcp-keepalive 300

#注意这里要把后台运行设置为no，避免docker后台运行冲突
daemonize no

supervised no
pidfile /docker/redis/redis.pid
loglevel notice

databases 16

always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb

#注意修改这里的目录为容器内目录，默认reids进来是在/data/目录
dir /data/

replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no

#注意修改这里的配置，yes开启持久化，no关闭持久化
appendonly yes

appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

4.启动容器

启动命令：docker run -p 6380:6380 --name forredis2 --privileged=true -v /docker/redis/redis.conf:/etc/redis/redis.conf -v /docker/redis/data:/data -d redis

效果如下：

[root@localhost]# docker run -p 6380:6380 --name forredis2 --privileged=true -v /docker/redis/redis.conf:/etc/redis/redis.conf -v /docker/redis/data:/data -d redis
d536dd728243ccee23b78e0289e30f7ee25084d308766fb9aa317d691d0dea7d
[root@localhost]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS                                                 NAMES
d536dd728243   redis     "docker-entrypoint.s…"   3 seconds ago   Up 2 seconds   6379/tcp, 0.0.0.0:6380->6380/tcp, :::6380->6380/tcp   forredis2参数讲解：

参数介绍：

• docker run -p 6380:6380 --name forredis2  别名
• --privileged=true  挂载容器卷目录权限
• -v /docker/redis/redis.conf[宿主机配置文件]:/etc/redis/redis.conf  [容器配置文件]
• -v /docker/redis/data[宿主机数据存储位置]:/data [容器数据存储位置]
• -d redis[:版本号]

二、进入容器，指定配置文件启动redis服务

1.启动redis服务

[root@localhost data]# docker exec -it forredis2 /bin/bash
root@d536dd728243:/data# redis-server /etc/redis/redis.conf
24:C 02 Jun 2022 02:42:56.096 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
24:C 02 Jun 2022 02:42:56.096 # Redis version=6.2.6, bits=64, commit=00000000, modified=0, pid=24, just started
24:C 02 Jun 2022 02:42:56.096 # Configuration loaded
24:M 02 Jun 2022 02:42:56.097 * monotonic clock: POSIX clock_gettime
                _._
           _.-``__ ''-._
      _.-``    `.  `_.  ''-._           Redis 6.2.6 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._
 (    '      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6380
 |    `-._   `._    /     _.-'    |     PID: 24
  `-._    `-._  `-./  _.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |           https://redis.io
  `-._    `-._`-.__.-'_.-'    _.-'
 |`-._`-._    `-.__.-'    _.-'_.-'|
 |    `-._`-._        _.-'_.-'    |
  `-._    `-._`-.__.-'_.-'    _.-'
      `-._    `-.__.-'    _.-'
          `-._        _.-'
              `-.__.-'

如果要后台运行，将启动redis命令后加上&，即

redis-server /etc/redis/redis.conf &

“/etc/redis/redis.conf”为容器内配置文件，已通过启动容器时挂载到宿主机的/docker/redis/redis.conf

2.指定6380端口登陆客户端

root@ce16f8c4fd8c:/data# redis-cli -p 6380
127.0.0.1:6380> auth 123
OK
127.0.0.1:6380> keys *
(empty array)
127.0.0.1:6380> set a 1
OK
127.0.0.1:6380> keys *
1) "a"

三、删除容器后重新启动容器

为了验证redis持久化，删除容器后数据在宿主机不会丢失，我们尝试删除容器后重新启动

1.删除，然后查看宿主机目录下是否有持久化文件，查看这一步可以放在上一步后

[root@localhost ~]# docker rm -f forredis2
forredis2
[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE           COMMAND                  CREATED        STATUS                      PORTS     NAMES
e28f2bd4b59e   redis           "docker-entrypoint.s…"   10 hours ago   Exited (130) 10 hours ago             exciting_yalow
4e291d491cda   redis           "docker-entrypoint.s…"   10 hours ago   Exited (0) 10 hours ago               dreamy_rhodes
be3f2f06ed9f   redis           "docker-entrypoint.s…"   12 hours ago   Exited (0) 12 hours ago               awesome_jones
9a206e517842   redis           "docker-entrypoint.s…"   12 hours ago   Exited (0) 12 hours ago               hopeful_volhard
69c9f429c98a   7614ae9453d1    "docker-entrypoint.s…"   16 hours ago   Exited (1) 16 hours ago               youthful_goodall
25f26d7892d5   redis           "docker-entrypoint.s…"   18 hours ago   Exited (0) 16 hours ago               amazing_lovelace
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
[root@localhost ~]# cd /docker/redis/data/
[root@localhost data]# ls
appendonly.aof  dump.rdb

2.重启容器

[root@localhost data]# docker run -p 6380:6380 --name forredis2 --privileged=true -v /docker/redis/redis.conf:/etc/redis/redis.conf -v /docker/redis/data:/data -d redis
d536dd728243ccee23b78e0289e30f7ee25084d308766fb9aa317d691d0dea7dc

重复第【二】步的操作，进入redis，查看数据是否存在

[root@localhost ~]# docker exec -it forredis2 /bin/bash
root@d536dd728243:/data# redis-cli -p 6380
127.0.0.1:6380> auth 123
127.0.0.1:6380> keys *
1) "a"

数据存在，成功！

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