How to build a redis cluster under centos

Essential tools:

redis-3.0.0.tar

redis-3.0.0.gem (ruby and redis interface)

Analysis:

First of all, the number of clusters requires a base number. Here is a simple redis cluster (6 redis instances for clustering).

Operates on one server, so only 6 different port numbers are required. They are: 7001, 7002, 7003, 7004, 7005, 7006.

Steps:

1. Upload redis-3.0.0.tar to the server (specify your own software directory), and decompress redis-3.0.0.tar.

2. Install the c language environment (after installing centos, it comes with the c language environment)

yum install gcc-c++

3. Enter the redis-3.0.0 directory

make

4. Install redis to the /usr/local/redis directory

make install prefix=/usr/local/redis

5. Check whether the installation is successful (the bin directory appears)

6. Start redis on the front end ( Enter the bin directory in the picture above)

./redis-server (open)

./redis-cli shutdown (close)

7. Backend startup

You need to copy the redis.conf file in the redis decompressed source package (under the redis-3.0.0 directory) to the bin directory

Modify redis.conf file, change daemonize to yes first use vim redis.conf

Use the command backend to start redis

Execute in the bin directory./redis-server redis.conf

Check whether the startup is successful

How to close the backend startup:

./redis-cli shutdown

The above is a separate redis installation, then Come down and build a cluster!

Install ruby

yum install ruby
yum install rubygems

Upload the following files to the linux system

redis-3.0.0.gem (ruby and redis interface)

Enter the directory and execute: gem install redis-3.0.0.gem

Copy the following files in the src directory under the redis-3.0.0 package to /usr/local/ redis/redis-cluster/

Prerequisite: Create a new redis-cluster directory first

Building a cluster requires at least 3 hosts. If each host If you configure another slave machine, at least 6 machines are required.

The port design is as follows: 7001-7006

Step 1: Copy a 7001 machine

Enter the /usr/local/redis/ directory and execute cp bin ./redis- cluster/7001 –r

Step 2: If persistent files exist, delete

rm -rf appendonly.aof dump.rdb

Step 3: Set cluster parameters

Step 4: Modify the port

Step 5: Copy the 7002-7006 machine

Give me the directory structure of the desktop system:

Next, set up one-click to start all redis or close the redis group:

First, create a new file. You can use vim to open a file that does not exist, and then The save exists. (The start-all.sh and shutdown-all.sh in the picture above are the ones I created)

start-all.sh：

cd 7001
./redis-server redis.conf
cd ..
cd 7002
./redis-server redis.conf
cd ..
cd 7003
./redis-server redis.conf
cd ..
cd 7004
./redis-server redis.conf
cd ..
cd 7005
./redis-server redis.conf
cd ..
cd 7006
./redis-server redis.conf
cd ..

shutdow-all.sh：

cd 7001
./redis-cli -p 7001 shutdown
cd ..
cd 7002
./redis-cli -p 7002 shutdown
cd ..
cd 7003
./redis-cli -p 7003 shutdown
cd ..
cd 7004
./redis-cli -p 7004 shutdown
cd ..
cd 7005
./redis-cli -p 7005 shutdown
cd ..
cd 7006
./redis-cli -p 7006 shutdown
cd ..

Next modify the permissions of those two files and set them as startable script files

chmod u+x start-all.sh

chmod u+x shutdown-all.sh

Next use ruby ​​to connect these clusters for management

/redis-trib.rb create --replicas 1 192.168.78.133:7001 192.168.78.133:7002 192.168.78.133:7003 192.168.78.133:7004 192.168.78.133:7005 192.168.78.133: 7006

appears:

connecting to node 192.168.242.137:7001: ok
connecting to node 192.168.242.137:7002: ok
connecting to node 192.168.242.137:7003: ok
connecting to node 192.168.242.137:7004: ok
connecting to node 192.168.242.137:7005: ok
connecting to node 192.168.242.137:7006: ok
>>> performing hash slots allocation on 6 nodes...
using 3 masters:
192.168.242.137:7001
192.168.242.137:7002
192.168.242.137:7003
adding replica 192.168.242.137:7004 to 192.168.242.137:7001
adding replica 192.168.242.137:7005 to 192.168.242.137:7002
adding replica 192.168.242.137:7006 to 192.168.242.137:7003
m: 8240cd0fe6d6f842faa42b0174fe7c5ddcf7ae24 192.168.242.137:7001
  slots:0-5460 (5461 slots) master
m: 4f52a974f64343fd9f1ee0388490b3c0647a4db7 192.168.242.137:7002
  slots:5461-10922 (5462 slots) master
m: cb7c5def8f61df2016b38972396a8d1f349208c2 192.168.242.137:7003
  slots:10923-16383 (5461 slots) master
s: 66adf006fed43b3b5e499ce2ff1949a756504a16 192.168.242.137:7004
  replicates 8240cd0fe6d6f842faa42b0174fe7c5ddcf7ae24
s: cbb0c9bc4b27dd85511a7ef2d01bec90e692793b 192.168.242.137:7005
  replicates 4f52a974f64343fd9f1ee0388490b3c0647a4db7
s: a908736eadd1cd06e86fdff8b2749a6f46b38c00 192.168.242.137:7006
  replicates cb7c5def8f61df2016b38972396a8d1f349208c2
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 192.168.242.137:7001)
m: 8240cd0fe6d6f842faa42b0174fe7c5ddcf7ae24 192.168.242.137:7001
  slots:0-5460 (5461 slots) master
m: 4f52a974f64343fd9f1ee0388490b3c0647a4db7 192.168.242.137:7002
  slots:5461-10922 (5462 slots) master
m: cb7c5def8f61df2016b38972396a8d1f349208c2 192.168.242.137:7003
  slots:10923-16383 (5461 slots) master
m: 66adf006fed43b3b5e499ce2ff1949a756504a16 192.168.242.137:7004
  slots: (0 slots) master
  replicates 8240cd0fe6d6f842faa42b0174fe7c5ddcf7ae24
m: cbb0c9bc4b27dd85511a7ef2d01bec90e692793b 192.168.242.137:7005
  slots: (0 slots) master
  replicates 4f52a974f64343fd9f1ee0388490b3c0647a4db7
m: a908736eadd1cd06e86fdff8b2749a6f46b38c00 192.168.242.137:7006
  slots: (0 slots) master
  replicates cb7c5def8f61df2016b38972396a8d1f349208c2
[ok] all nodes agree about slots configuration.
>>> check for open slots...
>>> check slots coverage...
[ok] all 16384 slots covered.

It means success!

Test it, enter the 7001 directory and execute: ./redis-cli -h 192.168.242.137 -p 7001 –c

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