Redis 6.X Cluster 集群搭建
Part1Redis 6.X Cluster 集群搭建
碼哥帶大家完成在 CentOS 7 中安裝 Redis 6.x 教程。在學(xué)習(xí) Redis Cluster 集群之前，我們需要先搭建一套集群環(huán)境。機(jī)器有限，實(shí)現(xiàn)目標(biāo)是一臺(tái)機(jī)器上搭建 6 個(gè)節(jié)點(diǎn)，構(gòu)成一個(gè)三主三從集群模式。
1下載解壓
可直接到 Redis 官網(wǎng)下載最新穩(wěn)定包，地址：https://redis.io/download。或者使用 命令：sudo wget http://download.redis.io/releases/redis-6.0.9.tar.gz 下載安裝包.。
碼哥統(tǒng)一把軟件包放在 /opt/soft目錄下，并創(chuàng)建目錄mkdir redisCluster用于放置集群配置文件。在 redisCluster 目錄下執(zhí)行mkdir 7000 7001 7002 7003 7004 7005創(chuàng)建 6 個(gè)目錄分別對(duì)應(yīng)每個(gè)節(jié)點(diǎn) redis.conf 配置模板。tar -zxf redis-6.0.9.tar.gz -C redisCluster解壓到 redisCluster 目錄中。
2make 編譯
在編譯之前我們需要確認(rèn) gcc 版本，自 redis 6.0.0 之后，編譯 redis 需要支持 C11 特性，C11 特性在 4.9 中被引入。Centos 7 默認(rèn) gcc 版本為 4.8.5，所以需要升級(jí)gcc版本。
編譯錯(cuò)誤
否則在編譯過(guò)程中會(huì)遇到如下錯(cuò)誤日志：
In file included from server.c:31:0:
server.c:4999:59: error: ‘struct redisServer’ has no member named ‘cluster’
(server.cluster_enabled && nodeIsMaster(server.cluster->myself)));
^
cluster.h:58:27: note: in definition of macro ‘nodeIsMaster’
#define nodeIsMaster(n) ((n)->flags & CLUSTER_NODE_MASTER)
^
server.c: In function ‘main’:
server.c:5047:11: error: ‘struct redisServer’ has no member named ‘sentinel_mode’
server.sentinel_mode = checkForSentinelMode(argc,argv);
^
server.c:5064:15: error: ‘struct redisServer’ has no member named ‘sentinel_mode’
if (server.sentinel_mode) {
^
server.c:5131:19: error: ‘struct redisServer’ has no member named ‘sentinel_mode’
if (server.sentinel_mode && configfile && *configfile == '-') {
^
server.c:5153:168: error: ‘struct redisServer’ has no member named ‘sentinel_mode’
serverLog(LL_WARNING, "Warning: no config file specified, using the default config. In order to specify a config file use %s /path/to/%s.conf", argv[0], server.sentinel_mode ? "sentinel" : "redis");
^
server.c:5158:11: error: ‘struct redisServer’ has no member named ‘supervised’
server.supervised = redisIsSupervised(server.supervised_mode);
^
server.c:5158:49: error: ‘struct redisServer’ has no member named ‘supervised_mode’
server.supervised = redisIsSupervised(server.supervised_mode);
^
server.c:5159:28: error: ‘struct redisServer’ has no member named ‘daemonize’
int background = server.daemonize && !server.supervised;
^
server.c:5159:49: error: ‘struct redisServer’ has no member named ‘supervised’
int background = server.daemonize && !server.supervised;
^
server.c:5163:29: error: ‘struct redisServer’ has no member named ‘pidfile’
if (background || server.pidfile) createPidFile();
^
server.c:5168:16: error: ‘struct redisServer’ has no member named ‘sentinel_mode’
if (!server.sentinel_mode) {
^
server.c:5178:19: error: ‘struct redisServer’ has no member named ‘cluster_enabled’
if (server.cluster_enabled) {
^
server.c:5186:19: error: ‘struct redisServer’ has no member named ‘ipfd_count’
if (server.ipfd_count > 0 || server.tlsfd_count > 0)
^
server.c:5186:44: error: ‘struct redisServer’ has no member named ‘tlsfd_count’
if (server.ipfd_count > 0 || server.tlsfd_count > 0)
^
server.c:5188:19: error: ‘struct redisServer’ has no member named ‘sofd’
if (server.sofd > 0)
^
server.c:5189:94: error: ‘struct redisServer’ has no member named ‘unixsocket’
serverLog(LL_NOTICE,"The server is now ready to accept connections at %s", server.unixsocket);
^
server.c:5190:19: error: ‘struct redisServer’ has no member named ‘supervised_mode’
if (server.supervised_mode == SUPERVISED_SYSTEMD) {
^
server.c:5191:24: error: ‘struct redisServer’ has no member named ‘masterhost’
if (!server.masterhost) {
^
server.c:5201:19: error: ‘struct redisServer’ has no member named ‘supervised_mode’
if (server.supervised_mode == SUPERVISED_SYSTEMD) {
^
server.c:5208:15: error: ‘struct redisServer’ has no member named ‘maxmemory’
if (server.maxmemory > 0 && server.maxmemory < 1024*1024) {
^
server.c:5208:39: error: ‘struct redisServer’ has no member named ‘maxmemory’
if (server.maxmemory > 0 && server.maxmemory < 1024*1024) {
^
server.c:5209:176: error: ‘struct redisServer’ has no member named ‘maxmemory’
serverLog(LL_WARNING,"WARNING: You specified a maxmemory value that is less than 1MB (current value is %llu bytes). Are you sure this is what you really want?", server.maxmemory);
^
server.c:5212:31: error: ‘struct redisServer’ has no member named ‘server_cpulist’
redisSetCpuAffinity(server.server_cpulist);
^
server.c: In function ‘hasActiveChildProcess’:
server.c:1480:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
server.c: In function ‘a(chǎn)llPersistenceDisabled’:
server.c:1486:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
server.c: In function ‘writeCommandsDeniedByDiskError’:
server.c:3826:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
server.c: In function ‘iAmMaster’:
server.c:5000:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
....
解決方式
yum -y install gcc gcc-c++ make tcl
yum -y install centos-release-scl
yum -y install devtoolset-9-gcc devtoolset-9-gcc-c++ devtoolset-9-binutils
scl enable devtoolset-9 bash
升級(jí)之后便可解決 make 報(bào)錯(cuò)問(wèn)題。
注意：scl命令啟用只是臨時(shí)的，退出xshell或者重啟就會(huì)恢復(fù)到原來(lái)的gcc版本。如果要長(zhǎng)期生效的話，執(zhí)行如下 sudo echo "source /opt/rh/devtoolset-9/enable" >>/etc/profile。
cd /opt/soft/redisCluster/redis-6.0.9 切換到目錄執(zhí)行 make 。
編譯完成使用 make install 對(duì) redis 進(jìn)行安裝 ，命令：sudo make install。
3修改配置文件
cd /opt/soft/redisCluster/redis-6.0.9 將 redis.conf 分別復(fù)制到 7000 7001 7002 7003 7004 目錄中。
分別修改 6 個(gè) redis.conf
## 7000-7005端口
port 7000
## 后臺(tái)啟動(dòng)
daemonize yes
## 如果是在單機(jī)模擬集群必須指定bind的IP，如果不修改ip的話使用程序連接集群會(huì)報(bào)錯(cuò)
bind 192.168.221.150
## 開(kāi)啟redis-cluster集群
cluster-enabled yes
## 每個(gè)實(shí)例還包含存儲(chǔ)此節(jié)點(diǎn)配置的文件的路徑，默認(rèn)情況下為nodes.conf，自動(dòng)創(chuàng)建
cluster-config-file nodes_7000.conf
## 超時(shí)
cluster-node-timeout 500
## 開(kāi)啟aof
appendonly yes
#注釋cluster集群下不允許復(fù)制。
#replicaof 127.0.0.1 9000
#關(guān)閉保護(hù)模式,如果開(kāi)啟需要設(shè)置密碼，比較繁瑣，可根據(jù)自己的需求來(lái)
protected-mode no
每個(gè)配置文件只需要修改 port 和 cluster-config-file 就可以了。
4啟動(dòng)節(jié)點(diǎn)并創(chuàng)建集群
啟動(dòng)節(jié)點(diǎn)
進(jìn)入 redisCluster 目錄，執(zhí)行指令依次啟動(dòng)每個(gè)節(jié)點(diǎn)。redis-6.0.9/src/redis-server 700x/redis.conf 注意指定每個(gè)節(jié)點(diǎn)配置文件，如果不指定配置文件會(huì)默認(rèn)使用src下的配置。
創(chuàng)建集群
進(jìn)入任意一個(gè)節(jié)點(diǎn)，執(zhí)行以下指令創(chuàng)建集群
指令如下：
redis-6.0.9/src/redis-cli --cluster create 172.16.90.152:7000 172.16.90.152:7001 172.16.90.152:7002 172.16.90.152:7003 172.16.90.152:7004 172.16.90.152:7005 --cluster-replicas 1
集群參數(shù)解釋：
cluster-replicas 1：表示希望為集群中的每個(gè)主節(jié)點(diǎn)創(chuàng)建一個(gè)從節(jié)點(diǎn)(一主一從)。 cluster-replicas 2：表示希望為集群中的每個(gè)主節(jié)點(diǎn)創(chuàng)建兩個(gè)從節(jié)點(diǎn)(一主二從)。
控制臺(tái)響應(yīng)：
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 172.16.90.152:7004 to 172.16.90.152:7000
Adding replica 172.16.90.152:7005 to 172.16.90.152:7001
Adding replica 172.16.90.152:7003 to 172.16.90.152:7002
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 06c56f5a6a4436108fae931be499465985141d39 172.16.90.152:7000
slots:[0-5460] (5461 slots) master
M: 0ab7c9efd97319d94a8ea52452ec58f7708d812d 172.16.90.152:7001
slots:[5461-10922] (5462 slots) master
M: 096f076d99363270c02785a2fb298e2ee65d3f07 172.16.90.152:7002
slots:[10923-16383] (5461 slots) master
S: 69d621060295eb433af3e34e702142df0fd4d73d 172.16.90.152:7003
replicates 06c56f5a6a4436108fae931be499465985141d39
S: 1d37df0aa0e2310aedb5a380f95cc818256003f8 172.16.90.152:7004
replicates 0ab7c9efd97319d94a8ea52452ec58f7708d812d
S: d9204f6da875a4b2522c5fa25d9e6c1f95cf51ea 172.16.90.152:7005
replicates 096f076d99363270c02785a2fb298e2ee65d3f07
Can I set the above configuration? (type 'yes' to accept):
Can I set the above configuration? (type 'yes' to accept): 詢問(wèn)是否確認(rèn)節(jié)點(diǎn) slots 分配方案， 我們輸入 ‘yes’。
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
.
>>> Performing Cluster Check (using node 172.16.90.152:7000)
M: 06c56f5a6a4436108fae931be499465985141d39 172.16.90.152:7000
slots:[0-5460] (5461 slots) master
1 additional replica(s)
S: 1d37df0aa0e2310aedb5a380f95cc818256003f8 172.16.90.152:7004
slots: (0 slots) slave
replicates 0ab7c9efd97319d94a8ea52452ec58f7708d812d
M: 0ab7c9efd97319d94a8ea52452ec58f7708d812d 172.16.90.152:7001
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
S: d9204f6da875a4b2522c5fa25d9e6c1f95cf51ea 172.16.90.152:7005
slots: (0 slots) slave
replicates 096f076d99363270c02785a2fb298e2ee65d3f07
S: 69d621060295eb433af3e34e702142df0fd4d73d 172.16.90.152:7003
slots: (0 slots) slave
replicates 06c56f5a6a4436108fae931be499465985141d39
M: 096f076d99363270c02785a2fb298e2ee65d3f07 172.16.90.152:7002
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
[OK] All 16384 slots covered.
到此完成！
5查看集群狀態(tài)
redis-6.0.9/src/redis-cli --cluster check 172.16.90.152:7000
6注意事項(xiàng)
當(dāng)使用 redis-6.0.9/src/redis-cli --cluster create 172.16.90.152:7000 172.16.90.152:7001 172.16.90.152:7002 172.16.90.152:7003 172.16.90.152:7004 172.16.90.152:7005 --cluster-replicas 1 創(chuàng)建集群以后，一次創(chuàng)建，永久使用。之后直接啟動(dòng)每個(gè)節(jié)點(diǎn)即可構(gòu)建集群。
結(jié)束命令：redis-6.0.9/src/redis-cli -c -h 192.168.124.23 -p 7004 shutdown
進(jìn)入集群命令 redis-cli -c -h host -p prot 不帶-c 參數(shù)進(jìn)入的不是集群
搭建好集群后，期待下一篇「Redis 高可用篇：Cluster 能支持的數(shù)據(jù)有多大？」
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