哨兵机制

docker-compose-example.yml

@@ -5,14 +5,15 @@ services:
     container_name: redis-master
     ports:
       - ${REDIS_HOST_PORT}:6379
+      - ${REDIS_SENTINEL_1_HOST_PORT}:26379
     volumes:
       - ${REDIS_CONF_DIR}:/etc/redis
       - ${REDIS_DATA_DIR}:/data
       - ${REDIS_LOG_DIR}:/var/log/redis
     restart: always
     networks:
       default:
-        ipv4_address: 172.20.0.7
+        ipv4_address: 172.20.0.4
     environment:
       TZ: ${TIMEZONE}
     privileged: true
@@ -22,6 +23,7 @@ services:
     container_name: redis-slave-1
     ports:
       - ${REDIS_SLAVE_1_HOST_PORT}:6379
+      - ${REDIS_SENTINEL_2_HOST_PORT}:26379
     volumes:
       - ${REDIS_SLAVE_1_CONF_DIR}:/etc/redis
       - ${REDIS_SLAVE_1_DATA_DIR}:/data
@@ -31,7 +33,7 @@ services:
       - redis-master
     networks:
       default:
-        ipv4_address: 172.20.0.8
+        ipv4_address: 172.20.0.5
     environment:
       TZ: ${TIMEZONE}
     privileged: true
@@ -41,6 +43,7 @@ services:
     container_name: redis-slave-2
     ports:
       - ${REDIS_SLAVE_2_HOST_PORT}:6379
+      - ${REDIS_SENTINEL_3_HOST_PORT}:26379
     volumes:
       - ${REDIS_SLAVE_2_CONF_DIR}:/etc/redis
       - ${REDIS_SLAVE_2_DATA_DIR}:/data
@@ -50,7 +53,7 @@ services:
       - redis-master
     networks:
       default:
-        ipv4_address: 172.20.0.9
+        ipv4_address: 172.20.0.6
     environment:
       TZ: ${TIMEZONE}
     privileged: true

env.example

@@ -3,18 +3,21 @@ REDIS_VERSION=latest
 
 ######### redis-master ######
 REDIS_HOST_PORT=6379
+REDIS_SENTINEL_1_HOST_PORT=26379
 REDIS_DATA_DIR=./redis-master/data
 REDIS_CONF_DIR=./redis-master/conf
 REDIS_LOG_DIR=./redis-master/log
 
 ######### redis-slave-1 ######
 REDIS_SLAVE_1_HOST_PORT=6380
+REDIS_SENTINEL_2_HOST_PORT=26380
 REDIS_SLAVE_1_DATA_DIR=./redis-slave-1/data
 REDIS_SLAVE_1_CONF_DIR=./redis-slave-1/conf
 REDIS_SLAVE_1_LOG_DIR=./redis-slave-1/log
 
 ######### redis-slave-2 ######
 REDIS_SLAVE_2_HOST_PORT=6381
+REDIS_SENTINEL_3_HOST_PORT=26381
 REDIS_SLAVE_2_DATA_DIR=./redis-slave-2/data
 REDIS_SLAVE_2_CONF_DIR=./redis-slave-2/conf
 REDIS_SLAVE_2_LOG_DIR=./redis-slave-2/log

redis-master/conf/redis.conf

@@ -155,7 +155,7 @@ supervised no
 #
 # Creating a pid file is best effort: if Redis is not able to create it
 # nothing bad happens, the server will start and run normally.
-pidfile /var/run/redis_6379.pid
+pidfile "/var/run/redis_6379.pid"
 
 # Specify the server verbosity level.
 # This can be one of:
@@ -250,7 +250,7 @@ rdbcompression yes
 rdbchecksum yes
 
 # The filename where to dump the DB
-dbfilename dump.rdb
+dbfilename "dump.rdb"
 
 # The working directory.
 #
@@ -260,7 +260,7 @@ dbfilename dump.rdb
 # The Append Only File will also be created inside this directory.
 #
 # Note that you must specify a directory here, not a file name.
-dir ./
+dir "/data"
 
 ################################# REPLICATION #################################
 
@@ -1370,3 +1370,5 @@ rdb-save-incremental-fsync yes
 # the main dictionary scan
 # active-defrag-max-scan-fields 1000
 
+# Generated by CONFIG REWRITE
+replicaof 172.20.0.8 6379

redis-master/conf/sentinel.conf

@@ -0,0 +1,35 @@
+# Sentinel.conf
+
+# 端口号
+port 26379
+
+# 配置哨兵的监控参数
+# 格式：sentinel monitor <mastername> <masterip> <masterport> <quorum>
+# mastername 是为这个被监控的 master 起的名字
+# masterip 是被监控的 master 的 IP 或主机名。因为 Docker 容器之间可以使用容器名访问，所以这里写 master 节点的容器名
+# masterport 是被监控节点所监听的端口号
+# quorom 设定了当几个哨兵判定这个节点失效后，才认为这个节点真的失效了
+sentinel myid f84599e4178829e48714ca7a1418db972414b34c
+
+# 连接主节点的密码
+# 格式：sentinel auth-pass <master-name> <password>
+# sentinel auth-pass 172.20.0.7 redis
+
+# master 在连续多长时间无法响应 PING 指令后，就会主观判定节点下线，默认是 30s
+# 格式：sentinel down-after-milliseconds <mastername> <milliseconds>
+sentinel deny-scripts-reconfig yes
+
+# 日志文件
+logfile "/var/log/redis/sentinel.log"
+
+# Generated by CONFIG REWRITE
+dir "/data"
+sentinel monitor redis-master 172.20.0.8 6379 2
+sentinel down-after-milliseconds redis-master 20000
+sentinel config-epoch redis-master 1
+sentinel leader-epoch redis-master 1
+sentinel known-replica redis-master 172.20.0.4 6379
+sentinel known-replica redis-master 172.20.0.9 6379
+sentinel known-sentinel redis-master 172.20.0.8 26379 3af4477184a27c5cd2b8cffe777305a3e84253a3
+sentinel known-sentinel redis-master 172.20.0.9 26379 bbc97991cae04a23433d114fb5550212b8c511f8
+sentinel current-epoch 1

redis-master/conf/start.sh

@@ -6,4 +6,5 @@ echo 511 > /proc/sys/net/core/somaxconn
 echo never > /sys/kernel/mm/transparent_hugepage/enabled
 
 # 指定配置文件
-redis-server /etc/redis/redis.conf
+redis-server /etc/redis/redis.conf &
+redis-sentinel /etc/redis/sentinel.conf

redis-slave-1/conf/redis.conf

@@ -155,7 +155,7 @@ supervised no
 #
 # Creating a pid file is best effort: if Redis is not able to create it
 # nothing bad happens, the server will start and run normally.
-pidfile /var/run/redis_6379.pid
+pidfile "/var/run/redis_6379.pid"
 
 # Specify the server verbosity level.
 # This can be one of:
@@ -250,7 +250,7 @@ rdbcompression yes
 rdbchecksum yes
 
 # The filename where to dump the DB
-dbfilename dump.rdb
+dbfilename "dump.rdb"
 
 # The working directory.
 #
@@ -260,7 +260,7 @@ dbfilename dump.rdb
 # The Append Only File will also be created inside this directory.
 #
 # Note that you must specify a directory here, not a file name.
-dir ./
+dir "/data"
 
 ################################# REPLICATION #################################
 
@@ -283,7 +283,6 @@ dir ./
 #    network partition replicas automatically try to reconnect to masters
 #    and resynchronize with them.
 #
-replicaof redis-master 6379
 
 # If the master is password protected (using the "requirepass" configuration
 # directive below) it is possible to tell the replica to authenticate before

redis-slave-1/conf/sentinel.conf

@@ -0,0 +1,35 @@
+# Sentinel.conf
+
+# 端口号
+port 26379
+
+# 配置哨兵的监控参数
+# 格式：sentinel monitor <mastername> <masterip> <masterport> <quorum>
+# mastername 是为这个被监控的 master 起的名字
+# masterip 是被监控的 master 的 IP 或主机名。因为 Docker 容器之间可以使用容器名访问，所以这里写 master 节点的容器名
+# masterport 是被监控节点所监听的端口号
+# quorom 设定了当几个哨兵判定这个节点失效后，才认为这个节点真的失效了
+sentinel myid 3af4477184a27c5cd2b8cffe777305a3e84253a3
+
+# 连接主节点的密码
+# 格式：sentinel auth-pass <master-name> <password>
+# sentinel auth-pass 172.20.0.7 redis
+
+# master 在连续多长时间无法响应 PING 指令后，就会主观判定节点下线，默认是 30s
+# 格式：sentinel down-after-milliseconds <mastername> <milliseconds>
+sentinel deny-scripts-reconfig yes
+
+# 日志文件
+logfile "/var/log/redis/sentinel.log"
+
+# Generated by CONFIG REWRITE
+dir "/data"
+sentinel monitor redis-master 172.20.0.8 6379 2
+sentinel down-after-milliseconds redis-master 20000
+sentinel config-epoch redis-master 1
+sentinel leader-epoch redis-master 1
+sentinel known-replica redis-master 172.20.0.4 6379
+sentinel known-replica redis-master 172.20.0.9 6379
+sentinel known-sentinel redis-master 172.20.0.9 26379 bbc97991cae04a23433d114fb5550212b8c511f8
+sentinel known-sentinel redis-master 172.20.0.4 26379 f84599e4178829e48714ca7a1418db972414b34c
+sentinel current-epoch 1

redis-slave-1/conf/start.sh

@@ -6,4 +6,5 @@ echo 511 > /proc/sys/net/core/somaxconn
 echo never > /sys/kernel/mm/transparent_hugepage/enabled
 
 # 指定配置文件
-redis-server /etc/redis/redis.conf
+redis-server /etc/redis/redis.conf &
+redis-sentinel /etc/redis/sentinel.conf

redis-slave-2/conf/redis.conf

@@ -155,7 +155,7 @@ supervised no
 #
 # Creating a pid file is best effort: if Redis is not able to create it
 # nothing bad happens, the server will start and run normally.
-pidfile /var/run/redis_6379.pid
+pidfile "/var/run/redis_6379.pid"
 
 # Specify the server verbosity level.
 # This can be one of:
@@ -250,7 +250,7 @@ rdbcompression yes
 rdbchecksum yes
 
 # The filename where to dump the DB
-dbfilename dump.rdb
+dbfilename "dump.rdb"
 
 # The working directory.
 #
@@ -260,7 +260,7 @@ dbfilename dump.rdb
 # The Append Only File will also be created inside this directory.
 #
 # Note that you must specify a directory here, not a file name.
-dir ./
+dir "/data"
 
 ################################# REPLICATION #################################
 
@@ -283,7 +283,7 @@ dir ./
 #    network partition replicas automatically try to reconnect to masters
 #    and resynchronize with them.
 #
-replicaof redis-master 6379
+replicaof 172.20.0.8 6379
 
 # If the master is password protected (using the "requirepass" configuration
 # directive below) it is possible to tell the replica to authenticate before

redis-slave-2/conf/sentinel.conf

@@ -0,0 +1,35 @@
+# Sentinel.conf
+
+# 端口号
+port 26379
+
+# 配置哨兵的监控参数
+# 格式：sentinel monitor <mastername> <masterip> <masterport> <quorum>
+# mastername 是为这个被监控的 master 起的名字
+# masterip 是被监控的 master 的 IP 或主机名。因为 Docker 容器之间可以使用容器名访问，所以这里写 master 节点的容器名
+# masterport 是被监控节点所监听的端口号
+# quorom 设定了当几个哨兵判定这个节点失效后，才认为这个节点真的失效了
+sentinel myid bbc97991cae04a23433d114fb5550212b8c511f8
+
+# 连接主节点的密码
+# 格式：sentinel auth-pass <master-name> <password>
+# sentinel auth-pass 172.20.0.7 redis
+
+# master 在连续多长时间无法响应 PING 指令后，就会主观判定节点下线，默认是 30s
+# 格式：sentinel down-after-milliseconds <mastername> <milliseconds>
+sentinel deny-scripts-reconfig yes
+
+# 日志文件
+logfile "/var/log/redis/sentinel.log"
+
+# Generated by CONFIG REWRITE
+dir "/data"
+sentinel monitor redis-master 172.20.0.8 6379 2
+sentinel down-after-milliseconds redis-master 20000
+sentinel config-epoch redis-master 1
+sentinel leader-epoch redis-master 1
+sentinel known-replica redis-master 172.20.0.4 6379
+sentinel known-replica redis-master 172.20.0.9 6379
+sentinel known-sentinel redis-master 172.20.0.8 26379 3af4477184a27c5cd2b8cffe777305a3e84253a3
+sentinel known-sentinel redis-master 172.20.0.4 26379 f84599e4178829e48714ca7a1418db972414b34c
+sentinel current-epoch 1

redis-slave-2/conf/start.sh

@@ -6,4 +6,5 @@ echo 511 > /proc/sys/net/core/somaxconn
 echo never > /sys/kernel/mm/transparent_hugepage/enabled
 
 # 指定配置文件
-redis-server /etc/redis/redis.conf
+redis-server /etc/redis/redis.conf &
+redis-sentinel /etc/redis/sentinel.conf