redis环境搭建之主从复制集群+哨兵集群

环境：redis-5.0.5 + CentOS 6.x
单机伪集群搭建：6379为主节点，6380、6381为从节点

1、准备配置文件

1-1、准备主节点配置文件-6379.conf

mkdir /opt/test
vi /opt/test/6379.conf

6379.conf文件全配置

bind 127.0.0.1
# 端口号
port 6379
# 是否后台启动
daemonize no
# pid启动文件
pidfile /var/run/redis_6379.pid
loglevel notice
# 日志文件
#logfile /opt/redis5/log/redis_6379.log
# 数据存储目录
dir /opt/test/data/6379
protected-mode yes
supervised no
tcp-backlog 511
timeout 0
tcp-keepalive 300
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble 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
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

1-2、准备从节点配置文件-6380.conf

cp /opt/test/6379.conf /opt/test/6380.conf
vi /opt/test/6380.conf
# 修改端口号
port 6380
# 修改pid启动文件
pidfile /var/run/redis_6380.pid
# 修改数据存储目录
dir /opt/test/data/6380

6380.conf完整配置

bind 127.0.0.1
# 端口号
port 6380
# 是否后台启动
daemonize no
# pid启动文件
pidfile /var/run/redis_6380.pid
loglevel notice
# 日志文件
#logfile /opt/redis5/log/redis_6380.log
# 数据存储目录
dir /opt/test/data/6380
protected-mode yes
supervised no
tcp-backlog 511
timeout 0
tcp-keepalive 300
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble 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
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

1-3、准备从节点配置文件-6381.conf

cp /opt/test/6379.conf /opt/test/6381.conf
vi /opt/test/6381.conf
# 修改端口号
port 6381
# 修改pid启动文件
pidfile /var/run/redis_6381.pid
# 修改数据存储目录
dir /opt/test/data/6381

6381.conf完整配置

bind 127.0.0.1
# 端口号
port 6381
# 是否后台启动
daemonize no
# pid启动文件
pidfile /var/run/redis_6381.pid
loglevel notice
# 日志文件
#logfile /opt/redis5/log/redis_6381.log
# 数据存储目录
dir /opt/test/data/6381
protected-mode yes
supervised no
tcp-backlog 511
timeout 0
tcp-keepalive 300
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble 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
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

1-4、创建数据存储目录

mkdir -p /opt/test/data/6379
mkdir -p /opt/test/data/6380
mkdir -p /opt/test/data/6381

2、启动伪集群

# 启动主节点
redis-server /opt/test/6379.conf
# 启动从节点并追随主节点
redis-server /opt/test/6380.conf --replicaof 127.0.0.1 6379
redis-server /opt/test/6381.conf --replicaof 127.0.0.1 6379

2-1、6379启动

redis-server /opt/test/6379.conf

2-2、6380启动

redis-server /opt/test/6380.conf --replicaof 127.0.0.1 6379

6380启动后，6379的日志显示

2-3、6381启动

redis-server /opt/test/6381.conf --replicaof 127.0.0.1 6379

6381启动后，6379的日志显示

3、验证集群

3-1、连接6379端口，设置key zctest

3-2、连接6380端口，获取key zctest

3-3、连接6381端口，获取key zctest

4、模拟主节点宕机及手动故障转移

4-1、ctrl + c 关闭6379的redis服务

观察6380日志

观察6381日志

4-2、手动将6380手动切为新的主节点

redis-cli 连接6380

redis -cli -p 6380
# 将6380置为新的主节点
REPLICAOF no one

查看6380的日志

4-3、手动将6381切为6380的从节点

redis -cli -p 6381
# 追随6380节点
REPLICAOF 127.0.0.1 6380

查看6381日志

查看6380日志

5、将主从切换交给哨兵

搭建一个redis哨兵集群，端口分别为：26379、26380、26381
监控的redis主节点为：127.0.0.1 的 6379 端口

5-1、准备哨兵配置文件

# 配置文件26379.conf
vi /opt/test/26379.conf
# 文件添加如下内容
port 26379
sentinel monitor mymaster 127.0.0.1 6379 2

# 配置文件26380.conf
cp /opt/test/26379.conf /opt/test/26380.conf
vi /opt/test/26380.conf
# 修改端口为23680
port 26380

# 配置文件26381.conf
cp /opt/test/26379.conf /opt/test/26381.conf
vi /opt/test/26381.conf
# 修改端口为23681
port 26381

5-2、启动redis集群

# 启动主节点
redis-server /opt/test/6379.conf
# 启动从节点并追随主节点
redis-server /opt/test/6380.conf --replicaof 127.0.0.1 6379
redis-server /opt/test/6381.conf --replicaof 127.0.0.1 6379

具体参照 ：第 2 章

5-3、启动哨兵集群

启动26379
redis-server /opt/test/26379.conf --sentinel

启动26380
redis-server /opt/test/26380.conf --sentinel

启动26381
redis-server /opt/test/26381.conf --sentinel

5-4、手动模拟redis主节点6379宕机

1、ctrl + c 关闭6379的redis服务

2、等待一会儿，查看哨兵日志

26379日志

26380日志

26381日志

**
由日志： +switch-master mymaster 127.0.0.1 6379 127.0.0.1 6381
可见，主节点由6379 切换为了 6381

3、查看redis日志

1、查看redis 6380日志

2、查看redis 6381日志

6、特殊说明

1、redis中文文档更新有些滞后，比如 SLAVEOF 命令在Redis 5 之后替换为了 REPLICAOF，具体可根据help命令查看

2、如需搭建真正的redis集群或sentinel集群，只需在不同主机操作及相应配置文件修改IP及端口即可（文章只是为了方便演示所以搭建的伪分布式集群）

7、参考

1、主从复制：http://www.redis.cn/topics/replication.html
2、Redis 的 Sentinel 文档：http://www.redis.cn/topics/sentinel.html