- vm virtual machines (you can also use virtual machines that have a system on wind10)
- FinalShell Homemade Remote Tools
- centOs 7 System
- Install vm virtual machine
- FinalShell installed
- Create virtual machines for three centOs 7 systems on vm
Creating three centOs7 virtual machines in the vm to install redis requires a minimum of three redis for the redis cluster, because the underlying strategy for determining downtime in redis is to consider all nodes unavailable when they vote for more than half of a node.
The IP addresses of the three virtual machines are as follows:
master: 192.168.83.139 Port: 6379
From Node 1 (slave): 192.168.83.140 Port: 6379
From Node 2 (slave): 192.168.83.141 Port: 6379
Create a script file to install redis, redisInstall.sh, on the 220.127.116.11 server. More scripts)
#!/bin/bash # Open display of IP address cd /etc/sysconfig/network-scripts/ sed -i "/^ONBOOT=/s/no/yes/" ifcfg-ens33 service network restart ip addr # Install gcc-c++ dependencies yum install gcc-c++ -y # Install vim yum install vim-enhanced #Install wget yum -y install wget #Start installing redis if [ ! -d '/usr/local/redis' ] then mkdir /usr/local/redis else rm -rf /usr/local/redis mkdir /usr/local/redis fi cd /usr/local/redis wget https://download.redis.io/releases/redis-6.2.4.tar.gz tar xzf redis-6.2.4.tar.gz cd redis-6.2.4 make cd src ./redis-server & ./redis-cli
Installation will be completed after
There is a redis folder under /usr/local/, which is the installation path.
After successful installation on 192.168.83.139, copy the script redisInstall.sh with the command to two other servers.
# Format: scp file name root@server ip: address where the destination server will store the file #For example, copy redisInstall.sh to 192.168.83.140 and 192.168.83.141 scp redisInstall.sh firstname.lastname@example.org:/home/admin/script-sh/ scp redisInstall.sh email@example.com:/home/admin/script-sh/
After the copy is completed, redis are installed on 192.168.83.140 and 192.168.83.141 using the redisInstall.sh script, respectively.
Modify redis configuration
Modify the configuration of the primary node redis
Open/usr/local/redis/redis-6.2.4/redis.conf file with vim
Find the configuration for bind, which allows remote access to ip
For example, the primary node (192.168.83.139) allows two secondary nodes (192.168.83.140 and 192.168.83.141 access), which are configured as follows:
bind 192.168.83.140 192.168.83.141 # Or configure it to 0.0.0.0 to indicate that all IP s are accessible # bind 0.0.0.0
- Find port, change to 6379, (port default 6379)
- Turn off protection mode so that it is accessible externally. no means turn off
- Set redis to background boot
- Modify redis log storage address
- Set redis connection password
# Format: requirepass password requirepass root
- Set connection password for accessing primary node from node
# Format: master auth password masterauth root
- Save exit profile after modification is complete
- Create a folder and file (corresponding to the configuration in step 6) for the log files under the installation directory of redis.
Create folder logs under /usr/local/redis/redis-6.2.4/and file redis.log under logs folder
- Run the following script file open6379Port.sh to open port 6379 to the server's firewall
#!/bin/bash firewall-cmd --add-port=6379/tcp --permanent --zone=public #Restart the firewall (restart the firewall after modifying the configuration) firewall-cmd --reload
Configuration is complete by now
Modify the configuration of slave nodes
Use the scp command to copy the redis.conf of the primary node to overwrite the original configuration file from the directory where the node's configuration file is located.
The configuration from the node is modified based on the configuration of the copied primary node.
Open the copied configuration file.
Depending on the modification steps of the primary node, by step 2, modify the bound IP address.
For example, if the current IP from the slave node is 192.168.83.140, the configuration in step 2 is changed to
bind 192.168.83.139 192.168.83.141
After step 8, modify the following configuration, which identifies the IP and port of the primary node
replicaof 192.168.83.139 6379
The remaining steps are consistent with the primary node.
- Use commands on three servers to view redis that are already running and kill-9 to shut them down
ps -ef|grep redis
kill -9 redis Process Number
- Enter the / usr/local/redis/redis-6.2.4/src/directory on three servers and restart redis with the following command
Tip: You can view the log file at / usr/local/redis/redis-6.2.4/logs/after startup.
Create a key value on the nodes in the cluster, which can be obtained on other nodes if the cluster is successfully built.
- Enter **/usr/local/redis/redis-6.2.4/src/** and enter the client of redis using the following command
- Log on to redis using commands after entering the client
# Format: The password that auth configured in requirepass when configuring auth root
Test whether you have successfully logged in to redis, and the following illustration shows that you have successfully logged in.
Create a key value in the primary node (192.168.83.139)
Go to other redis registered from nodes (192.168.83.140 and 192.168.83.141).
The login steps are Step 1, Step 2, Step 3.
The key values set by the primary node can be obtained from node 192.168.83.140. The following figure:
The key values set by the primary node can be obtained from node 192.168.83.141. The following figure:
Indicates that the redis cluster has been successfully set up.