Construction of codis cluster

Posted by ankycooper on Fri, 21 Jan 2022 22:42:53 +0100

Codis is a distributed Redis solution. For upper tier applications, there is no significant difference between connecting to Codis Proxy and connecting to native Redis Server( List of unsupported commands ), the upper layer application can be used like a stand-alone Redis. The bottom layer of Codis will handle request forwarding, non-stop data migration and other work. Everything behind is transparent to the front client. It can be simply considered that the rear connection is a Redis service with unlimited memory.

I Download and install source code

1. Install Go operating environment

download

go Download path: https://storage.googleapis.com/golang/go1.8.3.linux-amd64.tar.gz
codis Installation website: https://codeload.github.com/CodisLabs/codis/zip/release3.2

Unzip the compressed package to the user level program installation directory / usr/local

Add path to environment variable

Be careful to make the environment variables take effect

source .bash_profile

2.codis environment installation and deployment

Install codis in the go directory and create a new directory,

mkdir -p /usr/local/go/src/github.com/CodisLabs

Enter directory

cd /usr/local/go/src/github.com/CodisLabs

mv /root/codis-release3.2.zip .
   32  ls
   33  unzip codis-release3.2.zip
   34  yum install -y unzip     
   35  unzip codis-release3.2.zip  decompression
   36  ls
   37  mv codis-release3.2 codis  
   38  ls
   39  yum install autoconf Installation dependency
   40  yum install git -y
   
    make MALLOC=libc

3.codis startup

Start CODIS dashboard

Start CODIS proxy

Start CODIS server

Start CODIS Fe

57  ./admin/codis-dashboard-admin.sh start  #Launch dashboard
   58  cat log/codis-dashboard.log.2022-01-21 #view log
   59  ./admin/codis-proxy-admin.sh start #Start CODIS proxy
   60  cat log/codis-proxy.log.2022-01-21 
   61  ./admin/codis-server-admin.sh start # Start CODIS server
   63  tail -n 100 /tmp/redis_6379.log 
   64  ./admin/codis-fe-admin.sh start    # Start CODIS Fe
   65  tail -n 100 log/codis-fe.log.2022-01-21

II Add group through fe

Access the cluster management page 172.25.24.9:9090 through fe add in the browser, select the newly built cluster CODIS demo, and you can see the started Proxy in the Proxy column. The group column is blank because the started Codis Server is not added to the cluster. Add NEW GROUP, enter 1, and then click NEW GROUP to add Codis Server, In the Add Server line, enter the Codis Server address 127.0.0.1:6379, add it to the NEW GROUP, and click Add Server. group

III Initialize slot through fe

The slot status of the new cluster is offline and needs to be initialized, that is, 1024 slots are allocated to each group. The fastest way to initialize is through the rebalance all slots button provided by fe. Click to complete the cluster construction.

IV. cluster configuration

1. Add two Redis instances

Add 6380 and 6381 Redis instances respectively.

cp config/redis.conf config/redis6380.conf
cp config/redis.conf config/redis6381.conf

vim config/redis6380.conf
///
  84 port 6380
 150 pidfile /tmp/redis_6380.pid
 163 logfile "/tmp/redis_6380.log"
///
./bin/codis-server ./config/redis6380.conf	##Start the new Redis instance

vim config/redis6381.conf
///
  84 port 6381
 150 pidfile /tmp/redis_6381.pid
 163 logfile "/tmp/redis_6381.log"
///
./bin/codis-server ./config/redis6381.conf	##Start the new Redis instance