环境说明
单机redis
192.168.41.101:6379
redis集群
192.168.41.101:7000 master 192.168.41.101:7001 master 192.168.41.101:7002 192.168.41.102:7000 master 192.168.41.102:7001 192.168.41.102:7002
迁移步骤
查看集群状态及节点槽分布
[[email protected] bin]# ./redis-cli -c -p 7000 127.0.0.1:7000> cluster nodes ab6d9f956de325cb4cf001abc31df365a5db5234 192.168.41.102:7001 slave 923c9ea13ec8fc19bed309dfbfad094320e1ca41 0 1560304528263 7 connected 48629733acbb8a580a39403dfac92845d63c97b3 192.168.41.101:7001 master - 0 1560304529768 2 connected 5461-10921 2cec8ac00f760c45d86f7903cefad85ec36704e7 192.168.41.102:7002 slave 923c9ea13ec8fc19bed309dfbfad094320e1ca41 0 1560304531271 7 connected 923c9ea13ec8fc19bed309dfbfad094320e1ca41 192.168.41.101:7000 myself,master - 0 0 7 connected 0-5460 e65b319e83997ed6f5323a26aaccba3f35522cbd 192.168.41.101:7002 slave 923c9ea13ec8fc19bed309dfbfad094320e1ca41 0 1560304532274 7 connected 5c0888d5bcceda2904311cbd5405596217c48105 192.168.41.102:7000 master - 0 1560304530268 4 connected 10922-16383
[[email protected] src]# ./redis-trib.rb check 192.168.41.101:7000 >>> Performing Cluster Check (using node 192.168.41.101:7000) M: 923c9ea13ec8fc19bed309dfbfad094320e1ca41 192.168.41.101:7000 slots:0-5460 (5461 slots) master 3 additional replica(s) S: ab6d9f956de325cb4cf001abc31df365a5db5234 192.168.41.102:7001 slots: (0 slots) slave replicates 923c9ea13ec8fc19bed309dfbfad094320e1ca41 M: 48629733acbb8a580a39403dfac92845d63c97b3 192.168.41.101:7001 slots:5461-10921 (5461 slots) master 0 additional replica(s) S: 2cec8ac00f760c45d86f7903cefad85ec36704e7 192.168.41.102:7002 slots: (0 slots) slave replicates 923c9ea13ec8fc19bed309dfbfad094320e1ca41 S: e65b319e83997ed6f5323a26aaccba3f35522cbd 192.168.41.101:7002 slots: (0 slots) slave replicates 923c9ea13ec8fc19bed309dfbfad094320e1ca41 M: 5c0888d5bcceda2904311cbd5405596217c48105 192.168.41.102:7000 slots:10922-16383 (5462 slots) master 0 additional replica(s) [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
把101:7001和102:7000两个master的slots转移到101:7000上
./redis-trib.rb reshard --from 5c0888d5bcceda2904311cbd5405596217c48105 --to 923c9ea13ec8fc19bed309dfbfad094320e1ca41 --slots 5462 --yes 192.168.41.101:7000 ./redis-trib.rb reshard --from 48629733acbb8a580a39403dfac92845d63c97b3 --to 923c9ea13ec8fc19bed309dfbfad094320e1ca41 --slots 5461 --yes 192.168.41.101:7000
查看转以后槽点分配
>>> Performing Cluster Check (using node 192.168.41.101:7000) M: 923c9ea13ec8fc19bed309dfbfad094320e1ca41 192.168.41.101:7000 slots:0-16383 (16384 slots) master 3 additional replica(s) S: ab6d9f956de325cb4cf001abc31df365a5db5234 192.168.41.102:7001 slots: (0 slots) slave replicates 923c9ea13ec8fc19bed309dfbfad094320e1ca41 M: 48629733acbb8a580a39403dfac92845d63c97b3 192.168.41.101:7001 slots: (0 slots) master 0 additional replica(s) S: 2cec8ac00f760c45d86f7903cefad85ec36704e7 192.168.41.102:7002 slots: (0 slots) slave replicates 923c9ea13ec8fc19bed309dfbfad094320e1ca41 S: e65b319e83997ed6f5323a26aaccba3f35522cbd 192.168.41.101:7002 slots: (0 slots) slave replicates 923c9ea13ec8fc19bed309dfbfad094320e1ca41 M: 5c0888d5bcceda2904311cbd5405596217c48105 192.168.41.102:7000 slots: (0 slots) master 0 additional replica(s) [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
把192.168.41.101:6379的appendonly.aof 文件复制到101:7000的aof文件目录下
cp 6379目录/appendonly.aof 7000目录
重启101:7000节点加载aof文件
[[email protected] bin]# ./redis-cli -c -p 7000 shutdown [[email protected] bin]# ./redis-server ../redis.conf
查看数据是否正确
dbsize
将101:7000的槽 均匀分配给其他两个master节点
./redis-trib.rb reshard --from 923c9ea13ec8fc19bed309dfbfad094320e1ca41 --to 5c0888d5bcceda2904311cbd5405596217c48105 --slots 5462 --yes 192.168.41.101:7000 ./redis-trib.rb reshard --from 923c9ea13ec8fc19bed309dfbfad094320e1ca41 --to 48629733acbb8a580a39403dfac92845d63c97b3 --slots 5461 --yes 192.168.41.101:7000
再次查看集群状态和槽分配。
原文地址：https://www.cnblogs.com/blazeZzz/p/11007977.html
时间： 2024-10-30 13:39:32