執行命令
docker pull redis啟動三臺機器，6379容器作為主節點，其餘作為從節點
| 機器IP | 角色 | 埠 |
|---|---|---|
| 172.17.0.2 | Master | 6379 |
| 172.17.0.3 | Slave1 | 6380 |
| 172.17.0.4 | Slave2 | 6381 |
目錄結構
├── conf
│ ├── redis_6379.conf
│ ├── redis_6380.conf
│ ├── redis_6381.conf
│ ├── sentinel_26379.conf
│ ├── sentinel_26380.conf
│ └── sentinel_26381.conf
├── data_6379
│ ├── appendonly.aof
│ └── dump.rdb
├── data_6380
│ └── dump.rdb
├── data_6381
│ └── dump.rdb
└── scripts
├── run.sh
└── sentinel.shredis_.conf 配置檔案
下載配置檔案，具體配置另行調整即可
https://raw.githubusercontent.com/antirez/redis/5.0/redis.confsentinel_.conf 配置檔案
port 26379
dir "/etc/redis"
sentinel monitor mymaster 172.17.0.2 6379 1
sentinel down-after-milliseconds mymaster 60000
sentinel failover-timeout mymaster 180000run.sh 啟動指令碼檔案
#!/usr/bin/env bash
set -e
# 指令碼當前目錄
cPath=$(cd $(dirname "$0") || exit; pwd)
# 根目錄
dirPath=$(dirname "$cPath")
# 獲取埠
port="$1"
if [[ ! "$port" ]]; then
port=6379
fi
# 建立資料目錄
mkdir -p "$dirPath"/data_"$port"
# 刪除已啟動服務
containerId=$(docker ps -a | grep "redis_$port" | awk -F' ' '{print $1}')
if [[ "$containerId" ]]; then
echo "正在刪除服務：${containerId}"
docker rm -f ${containerId} > /dev/null
fi
# 啟動服務
docker run -itd --privileged=true -p "$port":6379 --name redis_"$port" \
-v="$dirPath"/conf/redis_"$port".conf:/etc/redis/redis.conf \
-v="$dirPath"/data_"$port":/data \
redis \
redis-server /etc/redis/redis.confsentinel.sh 啟動指令碼檔案
#!/usr/bin/env bash
set -e
# 指令碼當前目錄
cPath=$(cd $(dirname "$0") || exit; pwd)
# 根目錄
dirPath=$(dirname "$cPath")
# 設定埠
port=$1
if [[ ! "$port" ]]; then
port=26379
fi
# 刪除已啟動服務
containerId=$(docker ps -a | grep "sentinel_$port" | awk -F' ' '{print $1}')
if [[ "$containerId" ]]; then
echo "正在刪除服務：${containerId}"
docker rm -f ${containerId} > /dev/null
fi
# 啟動服務
docker run -itd --privileged=true -p "$port":26379 --name "sentinel_$port" \
-v="${dirPath}/conf/sentinel_${port}.conf":/etc/redis/sentinel.conf \
-w=/etc/redis/ \
redis \
redis-server /etc/redis/sentinel.conf --sentinel注意
啟動 sentinel 服務如果如下錯誤
1:X 10 May 2020 08:10:48.234 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:X 10 May 2020 08:10:48.235 # Sentinel config file /etc/redis/sentinel.conf is not writable: Permission denied. Exiting...解決方案
- 在docker run 中增加 ==-w=/etc/redis/==，具體見
sentinel.sh指令碼 - 修改目錄許可權
docker run -it --rm --privileged=true -v=/root/docker-config/redis/conf/:/etc/redis/ redis chown -R redis /etc/redis主要語句：==chown -R redis /etc/redis==
檢視修改後的許可權
root@DESKTOP-Q13EI52:~/docker-config/redis# docker run -it --rm --privileged=true -v=/root/docker-config/redis/conf/:/etc/redis/ redis ls -l /etc/redis/
total 204
-rw-r--r-- 1 redis root 61793 May 10 07:41 redis_6379.conf
-rw-r--r-- 1 redis root 61864 May 10 12:52 redis_6380.conf
-rw-r--r-- 1 redis root 61890 May 10 12:52 redis_6381.conf
-rw-r--r-- 1 redis root 459 May 10 12:52 sentinel_26379.conf
-rw-r--r-- 1 redis root 161 May 10 07:56 sentinel_26380.conf
-rw-r--r-- 1 redis root 161 May 10 10:16 sentinel_26381.conf啟動主服務
sh scripts/run.sh 6379啟動從服務
sh scripts/run.sh 6380
sh scripts/run.sh 6381進入從服務
docker exec -it redis_6380 bash
docker exec -it redis_6381 bash
# 進入容器後執行命令
redis-cli
# 設定為從服務
slaveof 172.17.0.2 6379效果圖
sh scripts/sentinel.sh效果圖
- 目前機器服務結構如下
root@DESKTOP-Q13EI52:~/docker-config/redis# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e518580ce8eb redis "docker-entrypoint.s…" About a minute ago Up About a minute 6379/tcp, 0.0.0.0:26379->26379/tcp sentinel_26379
e2ef253d3513 redis "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6381->6379/tcp redis_6381
15fdc81eb530 redis "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6380->6379/tcp redis_6380
77f4fdc84cb1 redis "docker-entrypoint.s…" 2 hours ago Up 2 hours 0.0.0.0:6379->6379/tcp redis_6379執行命令：docker stop redis_6379
1:X 10 May 2020 12:52:15.634 # +sdown master mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:15.634 # +odown master mymaster 172.17.0.2 6379 #quorum 1/1
1:X 10 May 2020 12:52:15.634 # +new-epoch 1
1:X 10 May 2020 12:52:15.634 # +try-failover master mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:15.649 # +vote-for-leader 6905a137af7baedbdfce4978d1d9126fdaad4faf 1
1:X 10 May 2020 12:52:15.649 # +elected-leader master mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:15.649 # +failover-state-select-slave master mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:15.725 # +selected-slave slave 172.17.0.3:6379 172.17.0.3 6379 @ mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:15.725 * +failover-state-send-slaveof-noone slave 172.17.0.3:6379 172.17.0.3 6379 @ mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:15.781 * +failover-state-wait-promotion slave 172.17.0.3:6379 172.17.0.3 6379 @ mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:16.798 # +promoted-slave slave 172.17.0.3:6379 172.17.0.3 6379 @ mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:16.798 # +failover-state-reconf-slaves master mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:16.845 * +slave-reconf-sent slave 172.17.0.4:6379 172.17.0.4 6379 @ mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:17.837 * +slave-reconf-inprog slave 172.17.0.4:6379 172.17.0.4 6379 @ mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:17.837 * +slave-reconf-done slave 172.17.0.4:6379 172.17.0.4 6379 @ mymaster 172.17.0.2 6379
1:X 10 May 2020 12:52:17.937 # +failover-end master mymaster 172.17.0.2 6379
# 生成執行故障轉移
1:X 10 May 2020 12:52:17.937 # +switch-master mymaster 172.17.0.2 6379 172.17.0.3 6379
1:X 10 May 2020 12:52:17.938 * +slave slave 172.17.0.4:6379 172.17.0.4 6379 @ mymaster 172.17.0.3 6379
1:X 10 May 2020 12:52:17.938 * +slave slave 172.17.0.2:6379 172.17.0.2 6379 @ mymaster 172.17.0.3 6379
1:X 10 May 2020 12:53:18.010 # +sdown slave 172.17.0.2:6379 172.17.0.2 6379 @ mymaster 172.17.0.3 6379注意
已經掉線的172.17.0.2:6379 主節點重新上線後將自動切換為從服務
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