Install Redis Cluster from scratch (Linux CenOS7)

Posted by msnhockey on Mon, 06 Jan 2020 07:37:05 +0100

Install CentOS7 Virtual Machine using ISO

Install jdk

  • Upload jdk to / home/software on Linux using FileZilla 
[root@localhost software]# mkdir /usr/java
...
[root@localhost software]# mkdir /home/software
...
[root@localhost software]# tar -zxvf jdk-8u231-linux-x64.tar.gz 
...
[root@localhost software]# mv jdk1.8.0_231 /usr/java/
...
  • Configuring java environment variables
  [root@localhost java]# vim /etc/profile
  ...
	#Add the following three items at the bottom
  export JAVA_HOME=/usr/java/jdk1.8.0_231
  export CLASSPATH=.:%JAVA_HOME%/lib/dt.jar:%JAVA_HOME%/lib/tools.jar
  export PATH=$PATH:$JAVA_HOME/bin
  ...
  [root@localhost java]# source /etc/profile
  [root@localhost java]# java -version
  java version "1.8.0_231"
  Java(TM) SE Runtime Environment (build 1.8.0_231-b11)
  Java HotSpot(TM) 64-Bit Server VM (build 25.231-b11, mixed mode)

Install Redis

  • https://redis.io/download Download a stable version

  • Upload redis to/home/software on Linux using FileZilla

  • Decompression package

    [root@localhost software]# tar -zxvf redis-5.0.7.tar.gz

    gcc needs to be installed because redis need to be compiled and generated

    [root@localhost software]# yum -y install gcc-c++
...
//Installed:
  gcc-c++.x86_64 0:4.8.5-39.el7                                                                                                                                                                                       

//Installed as a dependency:
  cpp.x86_64 0:4.8.5-39.el7              gcc.x86_64 0:4.8.5-39.el7  glibc-devel.x86_64 0:2.17-292.el7  glibc-headers.x86_64 0:2.17-292.el7  kernel-headers.x86_64 0:3.10.0-1062.9.1.el7  libmpc.x86_64 0:1.0.1-3.el7 
  libstdc++-devel.x86_64 0:4.8.5-39.el7  mpfr.x86_64 0:3.1.1-4.el7 

//Complete!

    Enter the redis-5.0.7 unzip directory to perform the installation:

    [root@localhost redis-5.0.7]# make && make install

  • Configure Redis

    [root@localhost utils]# ll
//Total usage 52
-rw-rw-r--. 1 root root  593 11 February 2001:05 build-static-symbols.tcl
-rw-rw-r--. 1 root root 1303 11 February 2001:05 cluster_fail_time.tcl
-rw-rw-r--. 1 root root 1098 11 February 2001:05 corrupt_rdb.c
drwxrwxr-x. 2 root root   60 11 February 2001:05 create-cluster
-rwxrwxr-x. 1 root root 2149 11 February 2001:05 generate-command-help.rb
drwxrwxr-x. 3 root root   31 11 February 2001:05 graphs
drwxrwxr-x. 2 root root   39 11 February 2001:05 hashtable
drwxrwxr-x. 2 root root   70 11 February 2001:05 hyperloglog
-rwxrwxr-x. 1 root root 9567 11 February 2001:05 install_server.sh
drwxrwxr-x. 2 root root   63 11 February 2001:05 lru
-rw-rw-r--. 1 root root 1277 11 February 2001:05 redis-copy.rb
-rwxrwxr-x. 1 root root 1352 11 February 2001:05 redis_init_script
-rwxrwxr-x. 1 root root 1047 11 February 2001:05 redis_init_script.tpl
-rw-rw-r--. 1 root root 1762 11 February 2001:05 redis-sha1.rb
drwxrwxr-x. 2 root root  135 11 February 2001:05 releasetools
-rwxrwxr-x. 1 root root 3787 11 February 2001:05 speed-regression.tcl
-rwxrwxr-x. 1 root root  693 11 February 2001:05 whatisdoing.sh

    As shown above, in the utils directory, there is a redis_init_script file, which is copied to the / etc/init.d/ directory for the purpose of configuring redis to start automatically.

    [root@localhost utils]# cp redis_init_script  /etc/init.d/
[root@localhost utils]# mkdir /usr/local/redis -p
[root@localhost redis-5.0.7]# cp redis.conf /usr/local/redis/

    Create/usr/local/redis directory to store redis configuration files.

  • Modify redis profile

    ################################# GENERAL #####################################

# Modify daemonize no to yes to start redis for background processes
daemonize yes
# Modify redis working path (data store location)
dir /usr/local/redis/workingdb
# Representatives can be accessed remotely without ip restrictions
#bind 127.0.0.1
bind 0.0.0.0
# Change Password
requirepass 12345678

  • Modify redis core configuration and file permissions in redis_init_script file

    
REDISPORT=6379
EXEC=/usr/local/bin/redis-server
CLIEXEC=/usr/local/bin/redis-cli

PIDFILE=/var/run/redis_${REDISPORT}.pid
CONF="/usr/local/redis/redis.conf"
[root@localhost init.d]# chmod 777 redis_init_script 
#Start redis
[root@localhost init.d]# ./redis_init_script start

  • Set boot-up self-start

    1. Add #chkconfig: 22345 10 90 &#description: Start and Stop redis to the startup script file under the /etc/init.d path 
    [root@iZ2ze7s2v0b78922wia32rZ init.d]# vim redis_init_script 
#!/bin/sh
#
# Simple Redis init.d script conceived to work on Linux systems
# as it does use of the /proc filesystem.

### BEGIN INIT INFO
# Provides:     redis_6379
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short-Description:    Redis data structure server
# Description:          Redis data structure server. See https://redis.io
### END INIT INFO

#chkconfig: 22345 10 90
#description: Start and Stop redis

REDISPORT=6379
EXEC=/usr/local/bin/redis-server
CLIEXEC=/usr/local/bin/redis-cli

PIDFILE=/var/run/redis_${REDISPORT}.pid
CONF="/usr/local/redis/redis.conf"

    1. Execute chkconfig redis_init_script on and start the configuration.

    2. Turn off redis

      [root@localhost redis]# /etc/init.d/redis_init_script stop
Stopping ...
(error) NOAUTH Authentication required.
Waiting for Redis to shutdown ...
Waiting for Redis to shutdown ...
[root@localhost redis]# vim /etc/init.d/redis_init_script 
# Password validation is also required in the script to turn redis off
stop)
        if [ ! -f $PIDFILE ]
        then
                echo "$PIDFILE does not exist, process is not running"
        else
                PID=$(cat $PIDFILE)
                echo "Stopping ..."
                $CLIEXEC -a "12345678" -p $REDISPORT shutdown
                while [ -x /proc/${PID} ]
                do
                    echo "Waiting for Redis to shutdown ..."
                    sleep 1
                done
                echo "Redis stopped"
        fi
        ;;
    *)

    3. After installation, the remote connection failed because the firewall is turned on by default in CentOS7

      # Stop Firewall
[root@localhost ~]# systemctl stop firewalld.service
# Prevent firewall from starting
[root@localhost ~]# systemctl disable firewalld.service
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.

      Or execute the following command to open port 6379

      firewall-cmd --zone=public --add-port=6379/tcp --permanent

Full Cloning Virtual Machine

  • Right-click directly on the machine you want to clone in VM ware fusion and select Create Full Clone

    • CentOS 7. Modify Ip directly

      vim /etc/sysconfig/network-scripts/ifcfg-ens33 # Modify IP Configuration
service network restart reset network

    • CentOS 6 or some versions, need to change MAC address and IP

      vim /etc/udev/rule.d/70-persistent-ipoib.rules
vim /etc/sysconfig/network-scripts/ifcfg-ens33 # Modify IP Configuration
service network restart reset network

Configuration environment variable failure under Mac

I configure environment variables in ~/.bash_profile myself, but the configuration does not work after each terminal restart. Need to be re-executed: $source ~/.bash_profile

It was found that zsh loaded the ~/.zshrc file, while the'.zshrc'file did not define task environment variables.

Solution

At the end of the ~/.zshrc file, add a line: source ~/.bash_profile

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