[redis] sentinel master master-name 내용 살펴보기

레디스 마스터 1대, 슬레이브 2대가 연결돼있다.

내가 센티널에서 설정한 마스터이름은 master-name 이므로

명령어의 마지막에 마스터이름을 붙이는데

master-name 으로 검색해보자

127.0.0.1:26379> sentinel master master-name
 1) "name"
 2) "master-name"
 3) "ip"
 4) "192.168.96.2"
 5) "port"
 6) "6379"
 7) "runid"
 8) "eab71173e1c5849f48cbdf65d1a35cdaab3e761f"
 9) "flags"
10) "master"
11) "link-pending-commands"
12) "0"
13) "link-refcount"
14) "1"
15) "last-ping-sent"
16) "0"
17) "last-ok-ping-reply"
18) "545"
19) "last-ping-reply"
20) "545"
21) "down-after-milliseconds"
22) "3000"
23) "info-refresh"
24) "6246"
25) "role-reported"
26) "master"
27) "role-reported-time"
28) "1190870"
29) "config-epoch"
30) "0"
31) "num-slaves"
32) "2"
33) "num-other-sentinels"
34) "0"
35) "quorum"
36) "2"
37) "failover-timeout"
38) "180000"
39) "parallel-syncs"
40) "1"

 

info sentinel을 확인해보자

127.0.0.1:26379> 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=master-name,status=ok,address=192.168.96.2:6379,slaves=2,sentinels=1

 

위의 구성시 사용한 docker-compose.yml은 다음과 같다.

docker-compose.yml

version: '2'

services:

  # master : bitnami/redis:6.2.6
  redis-master:
    hostname: redis-master
    container_name: redis-master
    image: bitnami/redis:6.2.6
    environment:
      - REDIS_REPLICATION_MODE=master
      - ALLOW_EMPTY_PASSWORD=yes
    ports:
      - 6379:6379

  # slave1 : bitnami/redis:6.2.6
  redis-slave-1:
    hostname: redis-slave-1
    container_name: redis-slave-1
    image: bitnami/redis:6.2.6
    environment:
      - REDIS_REPLICATION_MODE=slave
      - REDIS_MASTER_HOST=redis-master
      - ALLOW_EMPTY_PASSWORD=yes
    ports:
      - 6480:6379
    depends_on:
      - redis-master

  # slave2 : bitnami/redis:6.2.6
  redis-slave-2:
    hostname: redis-slave-2
    container_name: redis-slave-2
    image: bitnami/redis:6.2.6
    environment:
      - REDIS_REPLICATION_MODE=slave
      - REDIS_MASTER_HOST=redis-master
      - ALLOW_EMPTY_PASSWORD=yes
    ports:
      - 6481:6379
    depends_on:
      - redis-master
      - redis-slave-1

  # sentinel : bitnami/redis-sentinel:6.2.6
  redis-sentinel:
    hostname: redis-sentinel
    container_name: redis-sentinel
    image: bitnami/redis-sentinel:6.2.6
    environment:
      - REDIS_SENTINEL_DOWN_AFTER_MILLISECONDS=3000
      - REDIS_MASTER_HOST=redis-master
      - REDIS_MASTER_PORT_NUMBER=6379
      - REDIS_MASTER_SET=master-name
      - REDIS_SENTINEL_QUORUM=2
    depends_on:
      - redis-master
      - redis-slave-1
      - redis-slave-2
    ports:
      - 26379-26381:26379