网站费用多少钱一年,香烟网上商城,百度平台营销宝典,做纸箱在什么网站找客户问题 容量不够#xff0c;redis 如何进行扩容#xff1f;并发写操作#xff0c; redis 如何分摊#xff1f;另外#xff0c;主从模式#xff0c;薪火相传模式#xff0c;主机宕机#xff0c;导致 ip 地址发生变化#xff0c;应用程序中配置需要修改对应的主机地址、端…问题 容量不够redis 如何进行扩容并发写操作 redis 如何分摊另外主从模式薪火相传模式主机宕机导致 ip 地址发生变化应用程序中配置需要修改对应的主机地址、端口等信息。
之前通过代理主机来解决但是 redis7.0 中提供了解决方案。就是 无中心化集群 配置即每个节点都可以和其他节点进行联系。如 A、B、C 节点。想访问 B 节点可以先访问 A 节点A 节点会去联系 B 节点。无须代理服务器或者负载均衡去找对应的节点
什么是集群 Redis 集群实现了对 Redis 的水平扩容即启动 N 个 redis 节点将整个数据库分布存储在这 N 个节点中每个节点存储总数据的 1/N。 Redis 集群通过分区partition来提供一定程度的可用性availability即使集群中有一部分节点失效或者无法进行通讯集群也可以继续处理命令请求。
环境准备
将 rdb、aof 文件都删除掉三台虚拟机新建目录/myredis/cluster制作 6 个实例三主三从三主机端口分别为 638163836385。三从机端口分别为638263846386具体端口视情况每一个配置文件的基本信息修改和 主从复制 - 哨兵模式 一样 开启 daemonize yes指定 6 个端口不能重复6 个 Pid 文件名字配置不能重复尽量以加上端口进行识别6 个 Log 文件名字不能重复尽量以加上端口进行识别6 个 dump.rdb 名字不能重复尽量以加上端口进行识别Appendonly 关掉或者换名字每一个配置文件的集群信息修改 cluster-enabled yes打开集群模式cluster-config-file nodes-6379.conf设定节点配置文件名cluster-node-timeout 15000设定节点失联时间超过该时间毫秒集群自动进行主从切换
配置文件模板替换端口号
[rootredis-cluster2 cluster]# cat redisCluster6383.conf
bind 0.0.0.0
daemonize yes
protected-mode no
logfile /myredis/cluster/cluster6383.log
pidfile /myredis/cluster6383.pid
dir /myredis/cluster
dbfilename dump6383.rdb
appendonly yes
appendfilename appendonly6383.aof
requirepass 111111
masterauth 111111
port 6383cluster-enabled yes
cluster-config-file nodes-6383.conf
cluster-node-timeout 5000将以上配置文件分别写入到三台虚拟机中每个虚拟机其两个redis服务使用redis-server指定配置文件启动
[rootredis-cluster2 cluster]# redis-server /myredis/cluster/redisCluster6383.conf
[rootredis-cluster2 cluster]# redis-server /myredis/cluster/redisCluster6384.conf
[rootredis-cluster2 cluster]# ps -ef | grep redis
root 1950 1 0 15:38 ? 00:00:00 redis-server 0.0.0.0:6383 [cluster]
root 1956 1 0 15:38 ? 00:00:00 redis-server 0.0.0.0:6384 [cluster]
root 1962 1569 0 15:38 pts/0 00:00:00 grep --colorauto redis通过命令redis-cli为集群构建主从关系
[rootk8s-master01 cluster]# redis-cli -a 111111 --cluster create --cluster-replicas 1 192.168.58.129:6381 192.168.58.129:6382 192.168.58.130:6383 192.168.58.130:6384 192.168.58.212:6385 192.168.58.212:6386
Warning: Using a password with -a or -u option on the command line interface may not be safe.Performing hash slots allocation on 6 nodes...
Master[0] - Slots 0 - 5460
Master[1] - Slots 5461 - 10922
Master[2] - Slots 10923 - 16383
Adding replica 192.168.58.130:6384 to 192.168.58.129:6381
Adding replica 192.168.58.212:6386 to 192.168.58.130:6383
Adding replica 192.168.58.129:6382 to 192.168.58.212:6385
M: 772165af2d8a6b4600833ff36f33d1fe02acfa96 192.168.58.129:6381slots:[0-5460] (5461 slots) master
S: 5edb851c0aa5de08924f1d079c21b668e74e14ab 192.168.58.129:6382replicates c1e8aaf10e92cd3aebffe1247d8c99a9d857e916
M: e722f20399055c4543aa5a60697a1c6cebfe8e06 192.168.58.130:6383slots:[5461-10922] (5462 slots) master
S: afc75f35d9856b15040460f3373fd658907e1cc8 192.168.58.130:6384replicates 772165af2d8a6b4600833ff36f33d1fe02acfa96
M: c1e8aaf10e92cd3aebffe1247d8c99a9d857e916 192.168.58.212:6385slots:[10923-16383] (5461 slots) master
S: a256bdaeafd97ff59a4e59d994046ff102e7509b 192.168.58.212:6386replicates e722f20399055c4543aa5a60697a1c6cebfe8e06
Can I set the above configuration? (type yes to accept): yesNodes configuration updatedAssign a different config epoch to each nodeSending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
.Performing Cluster Check (using node 192.168.58.129:6381)
M: 772165af2d8a6b4600833ff36f33d1fe02acfa96 192.168.58.129:6381slots:[0-5460] (5461 slots) master1 additional replica(s)
S: afc75f35d9856b15040460f3373fd658907e1cc8 192.168.58.130:6384slots: (0 slots) slavereplicates 772165af2d8a6b4600833ff36f33d1fe02acfa96
S: 5edb851c0aa5de08924f1d079c21b668e74e14ab 192.168.58.129:6382slots: (0 slots) slavereplicates c1e8aaf10e92cd3aebffe1247d8c99a9d857e916
M: e722f20399055c4543aa5a60697a1c6cebfe8e06 192.168.58.130:6383slots:[5461-10922] (5462 slots) master1 additional replica(s)
S: a256bdaeafd97ff59a4e59d994046ff102e7509b 192.168.58.212:6386slots: (0 slots) slavereplicates e722f20399055c4543aa5a60697a1c6cebfe8e06
M: c1e8aaf10e92cd3aebffe1247d8c99a9d857e916 192.168.58.212:6385slots:[10923-16383] (5461 slots) master1 additional replica(s)
[OK] All nodes agree about slots configuration.Check for open slots...Check slots coverage...
[OK] All 16384 slots covered.
[rootk8s-master01 cluster]# ll
total 52
drwxr-xr-x. 2 root root 4096 Dec 1 15:30 appendonlydir
-rw-r--r--. 1 root root 10718 Dec 1 15:50 cluster6381.log
-rw-r--r--. 1 root root 15205 Dec 1 15:50 cluster6382.log
-rw-r--r--. 1 root root 171 Dec 1 15:49 dump6382.rdb
-rw-r--r--. 1 root root 799 Dec 1 15:49 nodes-6381.conf
-rw-r--r--. 1 root root 811 Dec 1 15:49 nodes-6382.conf
-rw-r--r--. 1 root root 347 Dec 1 15:32 redisCluster6381.conf
-rw-r--r--. 1 root root 346 Dec 1 15:32 redisCluster6382.conf
以6381为切入点查看集群状态
[rootk8s-master01 cluster]# redis-cli -a 111111 -p 6381
Warning: Using a password with -a or -u option on the command line interface may not be safe.
127.0.0.1:6381
127.0.0.1:6381 info replication
# Replication
role:master
connected_slaves:1
slave0:ip192.168.58.130,port6384,stateonline,offset224,lag0
master_failover_state:no-failover
master_replid:6955624b397904832e2911972f1c9b871e8b86fc
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:224
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:224
127.0.0.1:6381 集群指令
查看集群信息
127.0.0.1:6381 cluster nodes
afc75f35d9856b15040460f3373fd658907e1cc8 192.168.58.130:638416384 slave 772165af2d8a6b4600833ff36f33d1fe02acfa96 0 1733039642782 1 connected
5edb851c0aa5de08924f1d079c21b668e74e14ab 192.168.58.129:638216382 slave c1e8aaf10e92cd3aebffe1247d8c99a9d857e916 0 1733039641297 5 connected
e722f20399055c4543aa5a60697a1c6cebfe8e06 192.168.58.130:638316383 master - 0 1733039641617 3 connected 5461-10922
a256bdaeafd97ff59a4e59d994046ff102e7509b 192.168.58.212:638616386 slave e722f20399055c4543aa5a60697a1c6cebfe8e06 0 1733039641067 3 connected
c1e8aaf10e92cd3aebffe1247d8c99a9d857e916 192.168.58.212:638516385 master - 0 1733039640849 5 connected 10923-16383
772165af2d8a6b4600833ff36f33d1fe02acfa96 192.168.58.129:638116381 myself,master - 0 1733039639000 1 connected 0-5460查看键的插槽值
cluster keyslot k1
192.168.58.129:6381 cluster keyslot k1
(integer) 12706
192.168.58.129:6381 cluster keyslot k2
(integer) 449查看插槽值里有几个key
cluster countkeysinslot 4847 #只能看自己插槽的值查询集群中的值
cluster getkeysinslot slot count #返回 count 个 slot 槽中的键查看单节点
127.0.0.1:6381 cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:1226
cluster_stats_messages_pong_sent:1199
cluster_stats_messages_sent:2425
cluster_stats_messages_ping_received:1194
cluster_stats_messages_pong_received:1226
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:2425
total_cluster_links_buffer_limit_exceeded:0集群读写
在6381进行写操作时set k1出现报错显示到6385进行写操作set k2 却可以执行成功这是为什么呢
127.0.0.1:6381 set k1 v1
(error) MOVED 12706 192.168.58.212:6385
127.0.0.1:6381 set k2 v2
OK
127.0.0.1:6381 keys *
1) k2
127.0.0.1:6381 是因为集群在创建时分配了三个槽位必须在各自的槽位进行写操作 如何解决
防止路由失效添加参数-c并新增两个key
127.0.0.1:6381 FLUSHALL
OK
127.0.0.1:6381 keys *
(empty array)
127.0.0.1:6381 quit
[rootk8s-master01 cluster]# redis-cli -a 111111 -p 6381 -c
Warning: Using a password with -a or -u option on the command line interface may not be safe.
127.0.0.1:6381
127.0.0.1:6381
127.0.0.1:6381 keys *
(empty array)
127.0.0.1:6381 set k1 v1
- Redirected to slot [12706] located at 192.168.58.212:6385
OK
192.168.58.212:6385
192.168.58.212:6385 set k2 v2
- Redirected to slot [449] located at 192.168.58.129:6381
OK
