Docker-compose로 Redis Sentinel 자동 구성하기

Docker-compose로 Redis Sentinel 자동 구성하기

이번 글에서는 redis sentinel을 docker-compose 를 통해 구성하는 방법을 공유하겠습니다.
여기서 사용한 redis 이미지 및 redis / sentinel conf 파일 등 기본 환경은 제가 개인적으로 만든 것이기 때문에
이 글을 참고하시는 경우엔 본인의 환경에 맞게 설정이 필요합니다.

구성

* docker-compose.yml
    * redis_master
        * Dockerfile
            * docker-entrypoint.sh
    * redis_slave1
        * Dockerfile
            * docker-entrypoint.sh
    * redis_slave2
        * Dockerfile
            * docker-entrypoint.sh

docker-compose.yml

version: '3'
services:
  redis1:
    image: redis_image:master
    build:
      context: ./redis1
      dockerfile: Dockerfile
    stdin_open: true
    tty: true
    environment:
      - REQUIREPASS=qhdks123
      - PORT=6001
      - HOST=172.19.0.20
      - MASTER_HOST=172.19.0.20
      - MASTER_PORT=6001
      - SENTINEL_PORT=7001
      - QUORUM=2
    networks:
      redis_net:
        ipv4_address: 172.19.0.20
    restart: always
    container_name: redis_master
  redis2:
    image: redis_image:slave
    build:
      context: ./redis2
      dockerfile: Dockerfile
    stdin_open: true
    tty: true
    environment:
      - REQUIREPASS=qhdks123
      - PORT=6001
      - HOST=172.19.0.21
      - MASTER_HOST=172.19.0.20
      - MASTER_PORT=6001
      - SENTINEL_PORT=7001
      - QUORUM=2
    networks:
      redis_net:
        ipv4_address: 172.19.0.21
    depends_on:
      - redis1
    restart: always
    container_name: redis_slave1
  redis3:
    image: redis_image:slave
    build:
      context: ./redis3
      dockerfile: Dockerfile
    stdin_open: true
    tty : true
    environment:
      - REQUIREPASS=qhdks123
      - PORT=6001
      - HOST=172.19.0.22
      - MASTER_HOST=172.19.0.20
      - MASTER_PORT=6001
      - SENTINEL_PORT=7001
      - QUORUM=2
    networks:
      redis_net:
        ipv4_address: 172.19.0.22
    depends_on:
      - redis1
    restart: always
    container_name: redis_slave2

networks:
  redis_net:
    driver: bridge
    ipam:
     config:
       - subnet: 172.19.0.0/24

Dockerfile

FROM redis_image:latest

MAINTAINER kimdubi

USER root

ADD redis.conf /engn001/redis-stable/redis_6001.conf
ADD sentinel.conf /engn001/redis-stable/sentinel_7001.conf
ADD docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh

ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]

docker-entrypoint.sh - Master

#!/bin/sh
set -e

# MASTER
#sed -i "s/bind 127.0.0.1/bind 0.0.0.0/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/6379/$PORT/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/requirepass foobared/requirepass $REQUIREPASS/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/masterauth <master-password>/masterauth $REQUIREPASS/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/redis.log/redis_$PORT/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/redis.pid/redis_$PORT.pid/g" /engn001/redis-stable/redis_6001.conf

# SENTINEL

sed -i "s/26379/$SENTINEL_PORT/g" /engn001/redis-stable/sentinel_7001.conf
sed -i "s/master_ip master_port quorum/$MASTER_HOST $MASTER_PORT $QUORUM/g" /engn001/redis-stable/sentinel_7001.conf
sed -i "s/foobared/$REQUIREPASS/g" /engn001/redis-stable/sentinel_7001.conf

cp /engn001/redis-stable/redis_6001.conf /engn001/redis-stable/data
cp /engn001/redis-stable/sentinel_7001.conf /engn001/redis-stable/data

redis-server /engn001/redis-stable/redis_6001.conf &
sleep 10
redis-sentinel /engn001/redis-stable/sentinel_7001.conf &
sleep 10


/bin/bash

docker-entrypoint.sh - Slave

#!/bin/sh
set -e


# SLAVE
#sed -i "s/bind 127.0.0.1/bind 0.0.0.0/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/6379/$PORT/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/requirepass foobared/requirepass $REQUIREPASS/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/masterauth <master-password>/masterauth $REQUIREPASS/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/redis.log/redis_$PORT/g" /engn001/redis-stable/redis_6001.conf
sed -i "s/redis.pid/redis_$PORT.pid/g" /engn001/redis-stable/redis_6001.conf

sed -i "s/# replicaof <masterip> <masterport>/replicaof $MASTER_HOST $MASTER_PORT/g" /engn001/redis-stable/redis_6001.conf

# SENTINEL

sed -i "s/26379/$SENTINEL_PORT/g" /engn001/redis-stable/sentinel_7001.conf
sed -i "s/master_ip master_port quorum/$MASTER_HOST $MASTER_PORT $QUORUM/g" /engn001/redis-stable/sentinel_7001.conf
sed -i "s/foobared/$REQUIREPASS/g" /engn001/redis-stable/sentinel_7001.conf

cp /engn001/redis-stable/redis_6001.conf /engn001/redis-stable/data
cp /engn001/redis-stable/sentinel_7001.conf /engn001/redis-stable/data

redis-server /engn001/redis-stable/redis_6001.conf &
sleep 10
redis-sentinel /engn001/redis-stable/sentinel_7001.conf &
sleep 10

/bin/bash

실행

kimdubi:conf nhn$ docker-compose up -d --build
Building redis1
Step 1/7 : FROM redis_image:latest
 ---> a693415dce41
Step 2/7 : MAINTAINER kimdubi
 ---> Running in bdecdbf2d6f7
Removing intermediate container bdecdbf2d6f7
 ---> 5fc385f01aa0
Step 3/7 : USER root
 ---> Running in 5eee44db05cb
Removing intermediate container 5eee44db05cb
 ---> d4549d967334
Step 4/7 : ADD redis.conf /engn001/redis-stable/redis_6001.conf
 ---> 2055f6e1ab67
Step 5/7 : ADD sentinel.conf /engn001/redis-stable/sentinel_7001.conf
 ---> 2e87093ecc1b
Step 6/7 : ADD docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
 ---> a3549a5d4b59
Step 7/7 : ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
 ---> Running in 55c565c617c6
Removing intermediate container 55c565c617c6
 ---> 26542f033011
Successfully built 26542f033011
Successfully tagged redis_image:master
Building redis2
Step 1/7 : FROM redis_image:latest
 ---> a693415dce41
Step 2/7 : MAINTAINER kimdubi
 ---> Using cache
 ---> 5fc385f01aa0
Step 3/7 : USER root
 ---> Using cache
 ---> d4549d967334
Step 4/7 : ADD redis.conf /engn001/redis-stable/redis_6001.conf
 ---> Using cache
 ---> 2055f6e1ab67
Step 5/7 : ADD sentinel.conf /engn001/redis-stable/sentinel_7001.conf
 ---> Using cache
 ---> 2e87093ecc1b
Step 6/7 : ADD docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
 ---> 45302d0322cd
Step 7/7 : ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
 ---> Running in d76dc4496a3a
Removing intermediate container d76dc4496a3a
 ---> c21619894b01
Successfully built c21619894b01
Successfully tagged redis_image:slave
Building redis3
Step 1/7 : FROM redis_image:latest
 ---> a693415dce41
Step 2/7 : MAINTAINER kimdubi
 ---> Using cache
 ---> 5fc385f01aa0
Step 3/7 : USER root
 ---> Using cache
 ---> d4549d967334
Step 4/7 : ADD redis.conf /engn001/redis-stable/redis_6001.conf
 ---> Using cache
 ---> 2055f6e1ab67
Step 5/7 : ADD sentinel.conf /engn001/redis-stable/sentinel_7001.conf
 ---> Using cache
 ---> 2e87093ecc1b
Step 6/7 : ADD docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
 ---> Using cache
 ---> 45302d0322cd
Step 7/7 : ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
 ---> Using cache
 ---> c21619894b01
Successfully built c21619894b01
Successfully tagged redis_image:slave
Creating redis_master ... done
Creating redis_slave2 ... done
Creating redis_slave1 ... done

결과

• replication

[root@4295e99809a9 /]# redis-cli -p 6001 -a qhdks123
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6001> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=172.19.0.22,port=6001,state=online,offset=731969,lag=1
slave1:ip=172.19.0.21,port=6001,state=online,offset=731969,lag=1
master_replid:1017909b02914bc2a85a92b766852f7ea057b261
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:732105
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:67108864
repl_backlog_first_byte_offset:1
repl_backlog_histlen:732105

• sentinel

[root@4295e99809a9 /]# redis-cli -p 7001 -a qhdks123
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:7001> info sentinel
# Sentinel
sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
sentinel_simulate_failure_flags:0
master0:name=mymaster,status=ok,address=172.19.0.20:6001,slaves=2,sentinels=3