Redis的Cluster配置

时间：2021-09-02 20:49:56

　　　　　　　　　　　　　　　　　　Redis的Cluster配置

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

版权声明：原创作品，谢绝转载！否则将追究法律责任。

一.安装Redis并启动

1>.修改Redis的配置文件（本实验只有三个节点）

[root@node101.yinzhengjie.org.cn ~]# egrep -v "^#|^$" /etc/redis.conf

bind node101.yinzhengjie.org.cn

protected-mode yes

port

tcp-backlog

unixsocket "/tmp/redis.sock"

timeout

tcp-keepalive

daemonize no

supervised systemd

pidfile "/var/run/redis_6379.pid"

loglevel notice

logfile "/var/log/redis/redis.log"

databases

save

save

save

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename "dump.rdb"

dir "/var/lib/redis"

slave-serve-stale-data yes

slave-read-only yes

repl-diskless-sync no

repl-diskless-sync-delay

repl-disable-tcp-nodelay no

slave-priority

requirepass "yinzhengjie"

appendonly no

appendfilename "appendonly.aof"

appendfsync everysec

no-appendfsync-on-rewrite no

auto-aof-rewrite-percentage

auto-aof-rewrite-min-size 64mb

aof-load-truncated yes

lua-time-limit

cluster-enabled yes　　　　　　　　　　　　　　　　　　　　　　　　　　#我们需要启用cluster功能

cluster-config-file redis-cluster.conf　　　　　　　　　　　　　　 #指定cluster的配置文件

cluster-node-timeout 　　　　　　　　　　　　　　　　　　　　　　#指定节点的超时时间

slowlog-log-slower-than

slowlog-max-len

latency-monitor-threshold

notify-keyspace-events ""

hash-max-ziplist-entries

hash-max-ziplist-value

list-max-ziplist-size -

list-compress-depth

set-max-intset-entries

zset-max-ziplist-entries

zset-max-ziplist-value

hll-sparse-max-bytes

activerehashing yes

client-output-buffer-limit normal

client-output-buffer-limit slave 256mb 64mb

client-output-buffer-limit pubsub 32mb 8mb

hz

aof-rewrite-incremental-fsync yes

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# egrep -v "^#|^$" /etc/redis.conf

[root@node102.yinzhengjie.org.cn ~]#

[root@node102.yinzhengjie.org.cn ~]# egrep -v "^#|^$" /etc/redis.conf

bind node102.yinzhengjie.org.cn

protected-mode yes

port

tcp-backlog

unixsocket "/tmp/redis.sock"

timeout

tcp-keepalive

daemonize no

supervised systemd

pidfile "/var/run/redis_6379.pid"

loglevel notice

logfile "/var/log/redis/redis.log"

databases

save

save

save

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename "dump.rdb"

dir "/var/lib/redis"

slave-serve-stale-data yes

slave-read-only yes

repl-diskless-sync no

repl-diskless-sync-delay

repl-disable-tcp-nodelay no

slave-priority

requirepass "yinzhengjie"

appendonly no

appendfilename "appendonly.aof"

appendfsync everysec

no-appendfsync-on-rewrite no

auto-aof-rewrite-percentage

auto-aof-rewrite-min-size 64mb

aof-load-truncated yes

lua-time-limit

cluster-enabled yes

cluster-config-file redis-cluster.conf

cluster-node-timeout

slowlog-log-slower-than

slowlog-max-len

latency-monitor-threshold

notify-keyspace-events ""

hash-max-ziplist-entries

hash-max-ziplist-value

list-max-ziplist-size -

list-compress-depth

set-max-intset-entries

zset-max-ziplist-entries

zset-max-ziplist-value

hll-sparse-max-bytes

activerehashing yes

client-output-buffer-limit normal

client-output-buffer-limit slave 256mb 64mb

client-output-buffer-limit pubsub 32mb 8mb

hz

aof-rewrite-incremental-fsync yes

[root@node102.yinzhengjie.org.cn ~]#

[root@node102.yinzhengjie.org.cn ~]#

[root@node102.yinzhengjie.org.cn ~]# egrep -v "^#|^$" /etc/redis.conf

[root@node103.yinzhengjie.org.cn ~]# egrep -v "^#|^$" /etc/redis.conf

bind node103.yinzhengjie.org.cn

protected-mode yes

port

tcp-backlog

unixsocket "/tmp/redis.sock"

timeout

tcp-keepalive

daemonize no

supervised systemd

pidfile "/var/run/redis_6379.pid"

loglevel notice

logfile "/var/log/redis/redis.log"

databases

save

save

save

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename "dump.rdb"

dir "/var/lib/redis"

slave-serve-stale-data yes

slave-read-only yes

repl-diskless-sync no

repl-diskless-sync-delay

repl-disable-tcp-nodelay no

slave-priority

requirepass "yinzhengjie"

appendonly no

appendfilename "appendonly.aof"

appendfsync everysec

no-appendfsync-on-rewrite no

auto-aof-rewrite-percentage

auto-aof-rewrite-min-size 64mb

aof-load-truncated yes

lua-time-limit

cluster-enabled yes

cluster-config-file redis-cluster.conf

cluster-node-timeout

slowlog-log-slower-than

slowlog-max-len

latency-monitor-threshold

notify-keyspace-events ""

hash-max-ziplist-entries

hash-max-ziplist-value

list-max-ziplist-size -

list-compress-depth

set-max-intset-entries

zset-max-ziplist-entries

zset-max-ziplist-value

hll-sparse-max-bytes

activerehashing yes

client-output-buffer-limit normal

client-output-buffer-limit slave 256mb 64mb

client-output-buffer-limit pubsub 32mb 8mb

hz

aof-rewrite-incremental-fsync yes

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]# egrep -v "^#|^$" /etc/redis.conf

2>.启动Redis集群

[root@node101.yinzhengjie.org.cn ~]# systemctl start redis

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# systemctl status redis

● redis.service - Redis persistent key-value database

   Loaded: loaded (/usr/lib/systemd/system/redis.service; disabled; vendor preset: disabled)

  Drop-In: /etc/systemd/system/redis.service.d

           └─limit.conf

   Active: active (running) since Sun -- :: CST; 5min ago

 Main PID:  (redis-server)

   CGroup: /system.slice/redis.service

           └─ /usr/bin/redis-server node101.yinzhengjie.org.cn: [cluster]

Apr  :: node101.yinzhengjie.org.cn systemd[]: Starting Redis persistent key-value database...

Apr  :: node101.yinzhengjie.org.cn systemd[]: Started Redis persistent key-value database.

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# systemctl start redis

[root@node102.yinzhengjie.org.cn ~]# systemctl start redis

[root@node102.yinzhengjie.org.cn ~]#

[root@node102.yinzhengjie.org.cn ~]# systemctl status redis

● redis.service - Redis persistent key-value database

   Loaded: loaded (/usr/lib/systemd/system/redis.service; disabled; vendor preset: disabled)

  Drop-In: /etc/systemd/system/redis.service.d

           └─limit.conf

   Active: active (running) since Sun -- :: CST; 3s ago

 Main PID:  (redis-server)

   CGroup: /system.slice/redis.service

           └─ /usr/bin/redis-server node102.yinzhengjie.org.cn: [cluster]

Apr  :: node102.yinzhengjie.org.cn systemd[]: Starting Redis persistent key-value database...

Apr  :: node102.yinzhengjie.org.cn systemd[]: Started Redis persistent key-value database.

[root@node102.yinzhengjie.org.cn ~]#

[root@node102.yinzhengjie.org.cn ~]# systemctl start redis

[root@node103.yinzhengjie.org.cn ~]# systemctl start redis

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]# systemctl status redis

● redis.service - Redis persistent key-value database

   Loaded: loaded (/usr/lib/systemd/system/redis.service; disabled; vendor preset: disabled)

  Drop-In: /etc/systemd/system/redis.service.d

           └─limit.conf

   Active: active (running) since Sat -- :: PDT; 3s ago

 Main PID:  (redis-server)

   CGroup: /system.slice/redis.service

           └─ /usr/bin/redis-server node103.yinzhengjie.org.cn: [cluster]

Apr  :: node103.yinzhengjie.org.cn systemd[]: Starting Redis persistent key-value database...

Apr  :: node103.yinzhengjie.org.cn systemd[]: Started Redis persistent key-value database.

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]# systemctl start redis

3>.登录Redis服务器测试

[root@node103.yinzhengjie.org.cn ~]# redis-cli  -h node101.yinzhengjie.org.cn -a yinzhengjie

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:>

[root@node103.yinzhengjie.org.cn ~]# redis-cli -h node101.yinzhengjie.org.cn -a yinzhengjie

二.配置Redis Cluster

1>.查看cluster相关命令的帮助信息

[root@node103.yinzhengjie.org.cn ~]# redis-cli  -h node101.yinzhengjie.org.cn -a yinzhengjie

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:> HELP @cluster

  CLUSTER ADDSLOTS slot [slot ...]

  summary: Assign new hash slots to receiving node

  since: 3.0.

  CLUSTER COUNT-FAILURE-REPORTS node-id

  summary: Return the number of failure reports active for a given node

  since: 3.0.

  CLUSTER COUNTKEYSINSLOT slot

  summary: Return the number of local keys in the specified hash slot

  since: 3.0.

  CLUSTER DELSLOTS slot [slot ...]

  summary: Set hash slots as unbound in receiving node

  since: 3.0.

  CLUSTER FAILOVER [FORCE|TAKEOVER]

  summary: Forces a slave to perform a manual failover of its master.

  since: 3.0.

  CLUSTER FORGET node-id

  summary: Remove a node from the nodes table

  since: 3.0.

  CLUSTER GETKEYSINSLOT slot count

  summary: Return local key names in the specified hash slot

  since: 3.0.

  CLUSTER INFO -

  summary: Provides info about Redis Cluster node state

  since: 3.0.

  CLUSTER KEYSLOT key

  summary: Returns the hash slot of the specified key

  since: 3.0.

  CLUSTER MEET ip port

  summary: Force a node cluster to handshake with another node

  since: 3.0.

  CLUSTER NODES -

  summary: Get Cluster config for the node

  since: 3.0.

  CLUSTER REPLICATE node-id

  summary: Reconfigure a node as a slave of the specified master node

  since: 3.0.

  CLUSTER RESET [HARD|SOFT]

  summary: Reset a Redis Cluster node

  since: 3.0.

  CLUSTER SAVECONFIG -

  summary: Forces the node to save cluster state on disk

  since: 3.0.

  CLUSTER SET-CONFIG-EPOCH config-epoch

  summary: Set the configuration epoch in a new node

  since: 3.0.

  CLUSTER SETSLOT slot IMPORTING|MIGRATING|STABLE|NODE [node-id]

  summary: Bind a hash slot to a specific node

  since: 3.0.

  CLUSTER SLAVES node-id

  summary: List slave nodes of the specified master node

  since: 3.0.

  CLUSTER SLOTS -

  summary: Get array of Cluster slot to node mappings

  since: 3.0.

  READONLY -

  summary: Enables read queries for a connection to a cluster slave node

  since: 3.0.

  READWRITE -

  summary: Disables read queries for a connection to a cluster slave node

  since: 3.0.

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:6379> HELP @cluster

2>.命令行分配切片范围

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]# redis-cli  -h node101.yinzhengjie.org.cn -a yinzhengjie -c cluster addslots {..}

OK

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]# redis-cli  -h node102.yinzhengjie.org.cn -a yinzhengjie -c cluster addslots {..}

OK

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]# redis-cli  -h node103.yinzhengjie.org.cn -a yinzhengjie -c cluster addslots {..}

OK

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]#

3>.互相暴露各个节点

[root@node103.yinzhengjie.org.cn ~]# redis-cli -h node103.yinzhengjie.org.cn -a yinzhengjie

node103.yinzhengjie.org.cn:>

node103.yinzhengjie.org.cn:> CLUSTER INFO

cluster_state:fail

cluster_slots_assigned:

cluster_slots_ok:

cluster_slots_pfail:

cluster_slots_fail:

cluster_known_nodes:

cluster_size:

cluster_current_epoch:

cluster_my_epoch:

cluster_stats_messages_sent:

cluster_stats_messages_received:

node103.yinzhengjie.org.cn:>

node103.yinzhengjie.org.cn:6379> CLUSTER INFO

node103.yinzhengjie.org.cn:> CLUSTER MEET 172.30.1.101

OK

node103.yinzhengjie.org.cn:>

node103.yinzhengjie.org.cn:> CLUSTER MEET 172.30.1.102

OK

node103.yinzhengjie.org.cn:> 
node103.yinzhengjie.org.cn:> CLUSTER INFO

cluster_state:ok

cluster_slots_assigned:

cluster_slots_ok:

cluster_slots_pfail:

cluster_slots_fail:

cluster_known_nodes:

cluster_size:

cluster_current_epoch:

cluster_my_epoch:

cluster_stats_messages_sent:

cluster_stats_messages_received:

node103.yinzhengjie.org.cn:>

node103.yinzhengjie.org.cn:6379> CLUSTER INFO

[root@node102.yinzhengjie.org.cn ~]# redis-cli -h node102.yinzhengjie.org.cn -a yinzhengjie

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:> CLUSTER INFO

cluster_state:ok

cluster_slots_assigned:

cluster_slots_ok:

cluster_slots_pfail:

cluster_slots_fail:

cluster_known_nodes:

cluster_size:

cluster_current_epoch:

cluster_my_epoch:

cluster_stats_messages_sent:

cluster_stats_messages_received:

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:6379> CLUSTER INFO

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# redis-cli -h node101.yinzhengjie.org.cn -a yinzhengjie

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:> CLUSTER INFO

cluster_state:ok

cluster_slots_assigned:

cluster_slots_ok:

cluster_slots_pfail:

cluster_slots_fail:

cluster_known_nodes:

cluster_size:

cluster_current_epoch:

cluster_my_epoch:

cluster_stats_messages_sent:

cluster_stats_messages_received:

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:6379> CLUSTER INFO

4>.验证Redis的写操作

[root@node101.yinzhengjie.org.cn ~]# redis-cli -h node101.yinzhengjie.org.cn -a yinzhengjie

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:> SET name Jason　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　#注意，我们在node101.yinzhengjie.org.cn创建数据时失败啦！返回的是错误，说是name这个字段被hash到5798这个分片上，而该分片在172.30.1.102:6379这个节点上，因此我们应该去该节点配置！

(error) MOVED  172.30.1.102:

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:>

node101.yinzhengjie.org.cn:> quit

[root@node101.yinzhengjie.org.cn ~]#

[root@node101.yinzhengjie.org.cn ~]# redis-cli -h node102.yinzhengjie.org.cn -a yinzhengjie　　　　　　　　　　#于是，按照其错误的提示，我们登录到172.30.1.102:6379这个节点上去设置KEY

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:> SET name Jason　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 #果不其然，在该节点就可以成功创建名称为name的KEY

OK

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:> KEYS *

) "name"

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:>

5>.验证Redis的读操作

[root@node103.yinzhengjie.org.cn ~]# redis-cli -h node103.yinzhengjie.org.cn -a yinzhengjie

node103.yinzhengjie.org.cn:>

node103.yinzhengjie.org.cn:> KEYS *

(empty list or set)

node103.yinzhengjie.org.cn:>

node103.yinzhengjie.org.cn:> GET name　　　　　　　　　　　　　　#当我们想要读取name字段对应的value时，发现当前节点可以帮我们路由到真正存储的该节点上去

(error) MOVED  172.30.1.102:

node103.yinzhengjie.org.cn:>

node103.yinzhengjie.org.cn:> quit

[root@node103.yinzhengjie.org.cn ~]#

[root@node103.yinzhengjie.org.cn ~]# redis-cli -h node102.yinzhengjie.org.cn -a yinzhengjie

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:> KEYS *

) "name"

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:> GET name　　　　　　　　　　　　　　#按照上面的报错提示登录到指定的节点后，发现是可以读取数据的！

"Jason"

node102.yinzhengjie.org.cn:>

node102.yinzhengjie.org.cn:>

　　经测试，读写操作虽然能实现，但是对于程序员来说，手动去解决这些问题简直太麻烦了，推荐大家使用Cerberus（芒果TV）的解决方案，可以帮我们轻松解决上面遇到的读写问题！

　

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