标签：版本 false prefix time direct 自动跳转 启动 ati 2.4.1
说明：本实验是在2台服务器上搭建启动6个redis实例做的伪集群环境：
服务器1：10.129.24.16 redis实例5001、5002、5003
服务器2：10.129.24.7 redis实例5004、5005、5006
一、准备工作
1.1、安装redis
[root@Redis-RS01 src]# tar -zxvf redis-3.0.7.tar.gz [root@Redis-RS01 src]# cd redis-3.0.7 [root@Redis-RS01 redis-3.0.7]# make && make PREFIX=/usr/local/redis install
1.2、配置文件
daemonize yes pidfile /var/run/redis_5001.pid port 5001 bind 10.129.24.16 logfile "/usr/local/redis-cluster/5001/log/redis.log" dir /usr/local/redis-cluster/5001/data cluster-enabled yes cluster-config-file nodes5001.conf cluster-node-timeout 15000 appendonly yes
1.3、创建集群目录（多个redis实例）
[root@Redis-RS01 redis-3.0.7]# mkdir -p /usr/local/redis-cluster/{5001/{data,log},5002/{data,log},5003/{data,log}}
[root@Redis-RS01 redis-3.0.7]# cp redis.conf /usr/local/redis-cluster/5001/
[root@Redis-RS01 redis-3.0.7]# cp redis.conf /usr/local/redis-cluster/5002/
[root@Redis-RS01 redis-3.0.7]# sed -i 's/5001/5002/g' /usr/local/redis-cluster/5002/redis.conf
[root@Redis-RS01 redis-3.0.7]# cp redis.conf /usr/local/redis-cluster/5003/
[root@Redis-RS01 redis-3.0.7]# sed -i 's/5001/5003/g' /usr/local/redis-cluster/5002/redis.conf二、配置redis集群
2.1、redis3.0以后集群的创建命令是ruby实现的，所以要先安装ruby环境
[root@Redis-RS01 redis-3.0.7]# yum -y install ruby [root@Redis-RS01 redis-3.0.7]# yum -y install rubygems [root@Redis-RS01 redis-3.0.7]# gem install redis
这里安装redis可能会报错：
gem install redis
ERROR: Error installing redis:
redis requires Ruby version >= 2.2.2.
解决办法，安装大于2.2.2的ruby版本
[root@Redis-RS01 redis-3.0.7]# gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB [root@Redis-RS01 redis-3.0.7]# curl -sSL https://get.rvm.io | bash -s stable [root@Redis-RS01 redis-3.0.7]# source /usr/local/rvm/scripts/rvm [root@Redis-RS01 redis-3.0.7]# rvm install 2.4.1 [root@Redis-RS01 redis-3.0.7]# rvm use 2.4.1 [root@Redis-RS01 redis-3.0.7]# rvm use 2.4.1 --default [root@Redis-RS01 redis-3.0.7]# gem install redis Fetching: redis-4.0.1.gem (100%) Successfully installed redis-4.0.1 Parsing documentation for redis-4.0.1 Installing ri documentation for redis-4.0.1 Done installing documentation for redis after 3 seconds 1 gem installed
另一台服务器的配置和上面相同，就不在重复写了，注意配置文件中的端口和目录要配置正确
2.2、启动所有redis实例
[root@Redis-RS01 redis-3.0.7]# /usr/local/redis/bin/redis-server /usr/local/redis-cluster/5001/redis.conf [root@Redis-RS01 redis-3.0.7]# /usr/local/redis/bin/redis-server /usr/local/redis-cluster/5002/redis.conf [root@Redis-RS01 redis-3.0.7]# /usr/local/redis/bin/redis-server /usr/local/redis-cluster/5003/redis.conf
三、启动redis集群
3.1、redis-trib.rb命令的参数
1、 create ：创建集群
2、 check ：检查集群
3、 info ：查看集群信息
4、 fix ：修复集群
5、 reshard ：在线迁移slot
6、 rebalance ：平衡集群节点slot数量
7、 add-node ：将新节点加入集群
8、 del-node ：从集群中删除节点
9、 set-timeout ：设置集群节点间心跳连接的超时时间
10、 call ：在集群全部节点上执行命令
11、 import ：将外部redis数据导入集群
[root@Redis-RS01 5001]# /usr/local/redis-cluster/bin/redis-trib.rb create --replicas 1 10.129.24.16:5001 10.129.24.16:5002 10.129.24.16:5003 10.129.24.7:5004 10.129.24.7:5005 10.129.24.7:5006 >>> Creating cluster >>> Performing hash slots allocation on 6 nodes... Using 3 masters: 10.129.24.16:5001 10.129.24.7:5004 10.129.24.16:5002 Adding replica 10.129.24.7:5005 to 10.129.24.16:5001 Adding replica 10.129.24.16:5003 to 10.129.24.7:5004 Adding replica 10.129.24.7:5006 to 10.129.24.16:5002 M: 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b 10.129.24.16:5001 slots:0-5460 (5461 slots) master M: 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 10.129.24.16:5002 slots:10923-16383 (5461 slots) master S: 51d0615f10b6912e1e88bbca6cd4e8d843541f3a 10.129.24.16:5003 replicates bdf828d85ecb97612d16dc20803d25ade427e7e6 M: bdf828d85ecb97612d16dc20803d25ade427e7e6 10.129.24.7:5004 slots:5461-10922 (5462 slots) master S: 4a06022c8d4354cecbce3dc769173be0b100a939 10.129.24.7:5005 replicates 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b S: 958e79522a2eb81134a2e62d9fc991fe14320af4 10.129.24.7:5006 replicates 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 Can I set the above configuration? (type 'yes' to accept): 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 10.129.24.16:5001) M: 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b 10.129.24.16:5001 slots:0-5460 (5461 slots) master M: 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 10.129.24.16:5002 slots:10923-16383 (5461 slots) master M: 51d0615f10b6912e1e88bbca6cd4e8d843541f3a 10.129.24.16:5003 slots: (0 slots) master replicates bdf828d85ecb97612d16dc20803d25ade427e7e6 M: bdf828d85ecb97612d16dc20803d25ade427e7e6 10.129.24.7:5004 slots:5461-10922 (5462 slots) master M: 4a06022c8d4354cecbce3dc769173be0b100a939 10.129.24.7:5005 slots: (0 slots) master replicates 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b M: 958e79522a2eb81134a2e62d9fc991fe14320af4 10.129.24.7:5006 slots: (0 slots) master replicates 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered. [root@Redis-RS01 5001]#
--replicas 1 表示为每个主节点创建一个从节点
至此，redis集群创建完成，下面进行验证
四、验证
4.1、连接redis
[root@Redis-RS01 5001]# /usr/local/redis/bin/redis-cli -c -h 10.129.24.16 -p 5001 10.129.24.16:5001> keys * (empty list or set) 10.129.24.16:5001>
4.2、设置一个key
10.129.24.16:5001> set name "john.gou" -> Redirected to slot [5798] located at 10.129.24.7:5004 OK 10.129.24.7:5004>
我们看到已经成功写入，并且集群将数据自动分配到了5789槽中，5004的主redis实例上
4.3、连接其他实例尝试读取刚才设置的key
[root@Redis-RS01 5001]# /usr/local/redis/bin/redis-cli -c -h 10.129.24.16 -p 5002 10.129.24.16:5002> get name -> Redirected to slot [5798] located at 10.129.24.7:5004 "john.gou" [root@Redis-RS01 5001]# /usr/local/redis/bin/redis-cli -c -h 10.129.24.7 -p 5005 10.129.24.7:5005> get name -> Redirected to slot [5798] located at 10.129.24.7:5004 "john.gou" [root@Redis-RS01 5001]# /usr/local/redis/bin/redis-cli -c -h 10.129.24.16 -p 5003 10.129.24.16:5003> get name -> Redirected to slot [5798] located at 10.129.24.7:5004 "john.gou"
其他主实例也可以读取到
4.4、查看当前集群主从状态
[root@iZ28tqwgn5qZ redis-cluster]# /usr/local/redis-cluster/bin/redis-trib.rb check 10.129.24.16:5001 >>> Performing Cluster Check (using node 10.129.24.16:5001) M: 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b 10.129.24.16:5001 slots:0-5460 (5461 slots) master 1 additional replica(s) M: 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 10.129.24.16:5002 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: 958e79522a2eb81134a2e62d9fc991fe14320af4 10.129.24.7:5006 slots: (0 slots) slave replicates 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 M: bdf828d85ecb97612d16dc20803d25ade427e7e6 10.129.24.7:5004 slots:5461-10922 (5462 slots) master 1 additional replica(s) S: 4a06022c8d4354cecbce3dc769173be0b100a939 10.129.24.7:5005 slots: (0 slots) slave replicates 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b S: 51d0615f10b6912e1e88bbca6cd4e8d843541f3a 10.129.24.16:5003 slots: (0 slots) slave replicates bdf828d85ecb97612d16dc20803d25ade427e7e6 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
5001、5004、5002都是主实例，从实例分别是5005、5003、5006，下面我们关闭5004主实例，验证5003是否会升级为主接替5004实例
4.5、关掉5004实例验证数据可用性
[root@iZ28tqwgn5qZ redis-cluster]# ps -ef |grep redis root 2550 1 0 15:32 ? 00:00:01 /usr/local/redis/bin/redis-server 10.129.24.7:5004 [cluster] root 2558 1 0 15:32 ? 00:00:01 /usr/local/redis/bin/redis-server 10.129.24.7:5005 [cluster] root 2566 1 0 15:32 ? 00:00:01 /usr/local/redis/bin/redis-server 10.129.24.7:5006 [cluster] root 3876 12717 0 15:58 pts/7 00:00:00 grep redis [root@iZ28tqwgn5qZ redis-cluster]# kill -9 2550 [root@iZ28tqwgn5qZ redis-cluster]# /usr/local/redis/bin/redis-cli -c -h 10.129.24.16 -p 5001 10.129.24.16:5001> 10.129.24.16:5001> get name -> Redirected to slot [5798] located at 10.129.24.16:5003 "john.gou" 10.129.24.16:5003>
可以看到已经自动跳转到了5003实例上，刚才是5004
4.6、再次查看集群状态
[root@iZ28tqwgn5qZ redis-cluster]# /usr/local/redis-cluster/bin/redis-trib.rb check 10.129.24.16:5001 >>> Performing Cluster Check (using node 10.129.24.16:5001) M: 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b 10.129.24.16:5001 slots:0-5460 (5461 slots) master 1 additional replica(s) M: 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 10.129.24.16:5002 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: 958e79522a2eb81134a2e62d9fc991fe14320af4 10.129.24.7:5006 slots: (0 slots) slave replicates 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 S: 4a06022c8d4354cecbce3dc769173be0b100a939 10.129.24.7:5005 slots: (0 slots) slave replicates 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b M: 51d0615f10b6912e1e88bbca6cd4e8d843541f3a 10.129.24.16:5003 slots:5461-10922 (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.
5003实例已经接替5004变成主了
4.7、恢复5004实例验证是否会自动加入集群并接替5004变为主实例
[root@iZ28tqwgn5qZ redis-cluster]# /usr/local/redis/bin/redis-server ./5004/redis.conf [root@Redis-RS01 redis-cluster]# ./bin/redis-trib.rb check 10.129.24.16:5001 >>> Performing Cluster Check (using node 10.129.24.16:5001) M: 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b 10.129.24.16:5001 slots:0-5460 (5461 slots) master 1 additional replica(s) M: 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 10.129.24.16:5002 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: 958e79522a2eb81134a2e62d9fc991fe14320af4 10.129.24.7:5006 slots: (0 slots) slave replicates 85b7d3393161eef4b5faebc75b5f3be6c3cca2d9 S: bdf828d85ecb97612d16dc20803d25ade427e7e6 10.129.24.7:5004 slots: (0 slots) slave replicates 51d0615f10b6912e1e88bbca6cd4e8d843541f3a S: 4a06022c8d4354cecbce3dc769173be0b100a939 10.129.24.7:5005 slots: (0 slots) slave replicates 5cf7204523d806c7cf1bac7eb0b2fd4fcbf2a94b M: 51d0615f10b6912e1e88bbca6cd4e8d843541f3a 10.129.24.16:5003 slots:5461-10922 (5462 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.
可以看到，主恢复后不会接替现有的5003实例变为主，直到5003实例故障后从才会接替主
标签：版本 false prefix time direct 自动跳转 启动 ati 2.4.1
原文地址：http://blog.51cto.com/gouyc/2139668
