redis单机(启用外部配置文件)使用docker compose部署

环境:
OS:Centos 7
redis:7.4.0

1.准备redis配置文件

[root@localhost redisconf]# more redis.conf 
##daemonize yes
dir ./
port 6379
tcp-backlog 511
timeout 300
tcp-keepalive 300
loglevel notice
logfile "redis-6379.log"
databases 16
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-6379.rdb
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
appendonly yes
appendfilename "redis-6379.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated 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
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes
# Generated by CONFIG REWRITE
masterauth "hxl123"
requirepass "hxl123"
protected-mode yes
maxmemory-policy allkeys-lfu
maxmemory 4gb
maxmemory-samples 5

关键点:
daemonize必须设置为no或是注释掉

 

2.准备目录
mkdir -p /home/middle/redis_docker_compose ##docker-compose.yml
mkdir -p /home/middle/redis_docker_compose/redis/config ##这个目录需要提前创建好,redis配置文件存放到该目录

 

3.准备yaml配置文件

 

[root@localhost redis_docker_compose]# more docker-compose.yml 
version: '3'
services:
  redis:
    image: registry.cn-shenzhen.aliyuncs.com/hxlk8s/redis:7.4
    container_name: redis
    restart: always
    ports:
      - "6379:6379"
    volumes:
      - "./redis/data:/data"
      - "./redis/config:/etc/redis"
    command: redis-server /etc/redis/redis.conf

 

关键点说明:
a.需要外挂整个配置目录,而不是单个配置文件
正确的:
- "./redis/config:/etc/redis"
错误的:
- "./redis/config/redis.conf:/etc/redis/redis.conf"
这种情况会出现使用config rewrite 保持修改提示权限不足的问题
192.168.1.134:6379> config rewrite
(error) ERR Rewriting config file: Permission denied

b.数据外挂目录./redis/data,不需要提前创建,容器启动的时候会自动创建.

 

4.启动
[root@localhost redis_docker_compose]# cd /home/middle/redis_docker_compose
[root@localhost redis_docker_compose]# docker compose up -d

 

5.客户端尝试登录
[root@host135 bin]# /usr/local/services/redis/bin/redis-cli -h 192.168.1.134 -a hxl123 -p 6379
尝试修改参数,然后保存
192.168.1.134:6379> config set maxmemory 5GB
OK
192.168.1.134:6379> config rewrite
(error) ERR Rewriting config file: Permission denied

提示权限不足

6.登录容器修改配置目录权限
docker exec -ti redis /bin/bash

root@4129d74bc933:/data# ls -al
total 4
drwxr-xr-x 3 redis root 49 Jan 10 07:32 .
drwxr-xr-x 1 root root 17 Jan 10 07:32 ..
drwx------ 2 redis redis 103 Jan 10 07:32 appendonlydir
-rw------- 1 redis redis 1284 Jan 10 07:32 redis-6379.log

我们看到容器里面的redis是使用redis账号启动的,我们查看下配置文件所在的目录权限
root@49cb89886715:/data# cd /etc/redis
root@49cb89886715:/etc/redis# ls -al
total 4
drwxrwxr-x 2 root root 24 Jan 10 07:39 .
drwxr-xr-x 1 root root 19 Jan 10 07:40 ..
-rw-rw-r-- 1 root root 1246 Jan 10 07:39 redis.conf

修改容器里的目录权限为redis
root@4129d74bc933:/etc/redis# chown -R redis:redis /etc/redis

再次保持执行就可以了
192.168.1.134:6379> config rewrite
OK