redis集群配置
首先需要安装redis，可以参考此文档redis3.0.7安装指南 http://stephen830.iteye.com/blog/2289017。
安装完毕后，将解压出来的redis-3.0.7目录复制3份（为什么是3份呢？因为redis做集群至少要3个），将着3份的目录分别取名为redis-3.0.7_01、redis-3.0.7_02、redis-3.0.7_03 ，目录名可以按自己喜好定义。
这样，我们就有了3份的redis，然后分别修改redis-3.0.7_01、redis-3.0.7_02、redis-3.0.7_03目录下的redis.conf配置文件。
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
redis.conf 需要修改的参数
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
port 6379 #端口号，不要相同，可以分别为6379 6380 6381
bind 192.168.1.2 #本机IP地址
cluster-enabled yes #开启cluster模式，默认是no
cluster-config-file nodes-6379.conf #cluster的配置文件，同端口一样，分别设为nodes-6379.conf、nodes-6380.conf、nodes-6381.conf
cluster-node-timeout 5000 #cluster节点超时参数
appendonly yes
dbfilename dump-6379.rdb #缓存实体化保存文件名，同端口一样，分别设为dump-6379.rdb、dump-6380.rdb、dump-6381.rdb
然后，分别启动这3个目录下redis
/usr/local/redis-3.0.7_01/src/redis-server /usr/local/redis-3.0.7_01/redis.conf &
/usr/local/redis-3.0.7_02/src/redis-server /usr/local/redis-3.0.7_02/redis.conf &
/usr/local/redis-3.0.7_03/src/redis-server /usr/local/redis-3.0.7_03/redis.conf &
redis启动完成后，可以看到如下的提示：
--------------------------------------------------------------------------------------------------
29338:M 13 Apr 21:05:00.214 * No cluster configuration found, I'm a1eec932d923b55e23a5fe6a488ed7a97e27c826
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 3.0.0 (00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in cluster mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 29338
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
29338:M 13 Apr 21:05:00.246 # Server started, Redis version 3.0.0
29338:M 13 Apr 21:05:00.247 * DB loaded from disk: 0.000 seconds
29338:M 13 Apr 21:05:00.247 * The server is now ready to accept connections on port 6379
--------------------------------------------------------------------------------------------------
太多调试信息了，只有一句是最重要的：
No cluster configuration found, I'm a1eec932d923b55e23a5fe6a488ed7a97e27c826
这表示我们的redis服务器正在运行在cluster mode ，但是目前这3个redis尚未组成集群，继续执行下面的命令：
/usr/local/redis-3.0.7_01/src/redis-trib.rb create 10.10.228.163:6379 10.10.228.163:6380 10.10.228.163:6381
执行正常的话，会显示如下提升信息：
>>> Creating cluster
Connecting to node 10.10.228.163:6379: OK
Connecting to node 10.10.228.163:6380: OK
Connecting to node 10.10.228.163:6381: OK
>>> Performing hash slots allocation on 3 nodes...
Using 3 masters:
10.10.228.163:6379
10.10.228.163:6380
10.10.228.163:6381
M: 78a5bbdcd545848be8a66126a71dc69dd6d23bc4 10.10.228.163:6379
slots:0-5460 (5461 slots) master
M: 1f6ed2478b461539f76b0b627de2e1b8565df719 10.10.228.163:6380
slots:5461-10922 (5462 slots) master
M: 7a092b06c8c75e98176b7612e74d2e89e8b3eda7 10.10.228.163:6381
slots:10923-16383 (5461 slots) master
Can I set the above configuration? (type 'yes' to accept):
看上去很美，每个节点负责数据的1/3，键入 ‘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 127.0.0.1:7001)
M: 78a5bbdcd545848be8a66126a71dc69dd6d23bc4 10.10.228.163:6379
slots:0-5460 (5461 slots) master
M: 1f6ed2478b461539f76b0b627de2e1b8565df719 10.10.228.163:6380
slots:5461-10922 (5462 slots) master
M: 7a092b06c8c75e98176b7612e74d2e89e8b3eda7 10.10.228.163:6381
slots:10923-16383 (5461 slots) master
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
完成了
------------------------------------------------------------------
redis创建集群时可能会遇到的错误或问题:
------------------------------------------------------------------
错误1:
>>> Creating cluster
[ERR] Sorry, can't connect to node 127.0.0.1:6379
错误1解决方法：由于redis设置了密码，将redis.conf中的requirepass xxx这一行注释掉即可。
------------------------------------------------------------------
错误2:
root@10-10-228-163:/usr/local/redis-3.0.7/src# ./redis-trib.rb create 127.0.0.1:6379 127.0.0.1:6380 127.0.0.1:6381
>>> Creating cluster
>>> Performing hash slots allocation on 3 nodes...
Using 3 masters:
127.0.0.1:6379
127.0.0.1:6380
127.0.0.1:6381
M: 4f82f807e8024c083595868c2a0bba81bdf19893 127.0.0.1:6379
slots:0-5460,11144,12596,13595,14103,15358,15369 (5467 slots) master
M: 5102c6d494ed594975f5613a2653e9f3c72d07da 127.0.0.1:6380
slots:3225,3698,5461-10922,11144,12596,13595,14103,15358,15369 (5470 slots) master
M: 05119d158b226c76ac0e83f89bb0e053d4dd1356 127.0.0.1:6381
slots:10923-16383 (5461 slots) master
Can I set the above configuration? (type 'yes' to accept): yes
/var/lib/gems/1.9.1/gems/redis-3.3.0/lib/redis/client.rb:121:in `call': ERR Slot 3225 is already busy (Redis::CommandError)
from /var/lib/gems/1.9.1/gems/redis-3.3.0/lib/redis.rb:2700:in `block in method_missing'
from /var/lib/gems/1.9.1/gems/redis-3.3.0/lib/redis.rb:58:in `block in synchronize'
from /usr/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
from /var/lib/gems/1.9.1/gems/redis-3.3.0/lib/redis.rb:58:in `synchronize'
from /var/lib/gems/1.9.1/gems/redis-3.3.0/lib/redis.rb:2699:in `method_missing'
from ./redis-trib.rb:212:in `flush_node_config'
from ./redis-trib.rb:775:in `block in flush_nodes_config'
from ./redis-trib.rb:774:in `each'
from ./redis-trib.rb:774:in `flush_nodes_config'
from ./redis-trib.rb:1295:in `create_cluster_cmd'
from ./redis-trib.rb:1695:in `<main>'
root@10-10-228-163:/usr/local/redis-3.0.7/src#
root@10-10-228-163:/usr/local/redis-3.0.7/src#
错误2解决方法：经检查，这是由于上一次配置集群失败时留下的配置信息导致的。 只要把redis.conf中定义的 cluster-config-file 所在的文件删除，重新启动redis-server及运行redis-trib即可.
------------------------------------------------------------------
错误3:
root@10-10-228-163:/usr/local/redis-3.0.7/src# ./redis-cli -p 6379
127.0.0.1:6379> set key1 zjq
(error) MOVED 9189 127.0.0.1:6380
错误3解决方法：必须带参数-c来连接redis操作，即执行命令: ./redis-cli -c -p 6379
------------------------------------------------------------------
安装ruby:
apt-get install ruby-full
------------------------------------------------------------------
安装ruby所需要的redis模块:
root@10-10-228-163:/usr/local/redis-3.0.7# gem install redis
Fetching: redis-3.3.0.gem (100%)
Successfully installed redis-3.3.0
1 gem installed
Installing ri documentation for redis-3.3.0...
Installing RDoc documentation for redis-3.3.0...
root@10-10-228-163:/usr/local/redis-3.0.7#
如果用gem安装redis失败，可以手动下载redis的gem包
下载地址 https://rubygems.global.ssl.fastly.net/gems/redis-3.3.0.gem
然后使用gem安装命令:
zhoujianqiangdeMacBook-Pro:soft zjq$ sudo gem install -l ./redis-3.3.0.gem
Successfully installed redis-3.3.0
Parsing documentation for redis-3.3.0
Installing ri documentation for redis-3.3.0
Done installing documentation for redis after 1 seconds
1 gem installed
zhoujianqiangdeMacBook-Pro:soft zjq$
------------------------------------------------------------------
java链接redis-cluster
------------------------------------------------------------------
private static BinaryJedisCluster jc;
static {
//只给集群里一个实例就可以
Set<HostAndPort> jedisClusterNodes = new HashSet<HostAndPort>();
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 6380));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 6381));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 6382));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 6383));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 6384));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 7380));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 7381));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 7382));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 7383));
jedisClusterNodes.add(new HostAndPort("10.10.34.14", 7384));
jc = new BinaryJedisCluster(jedisClusterNodes);
}
@Test
public void testBenchRedisSet() throws Exception {
final Stopwatch stopwatch = new Stopwatch();
List list = buildBlogVideos();
for (int i = 0; i < 1000; i++) {
String key = "key:" + i;
stopwatch.start();
byte[] bytes1 = protostuffSerializer.serialize(list);
jc.setex(key, 60 * 60, bytes1);
stopwatch.stop();
}
System.out.println("time=" + stopwatch.toString());
}
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