CentOS installs docker and MySQL and redis environments

docker Installation and configuration

Official documents ：Install Docker Engine on CentOS | Docker Documentation

First su root Switch to root user , You don't have to add sudo 了 .

1. Uninstall the previously installed version ( If it has not been installed before, you can skip it )

   yum remove docker \
                    docker-client \
                    docker-client-latest \
                    docker-common \
                    docker-latest \
                    docker-latest-logrotate \
                    docker-logrotate \
                    docker-engine
   

2. Set up repository

    yum install -y yum-utils
    
    yum-config-manager \
       --add-repo \
       https://download.docker.com/linux/centos/docker-ce.repo
   

3. install docker

   yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin
   

4. Give Way docker Boot from boot

    systemctl enable docker
   

5. start-up docker

    systemctl start docker
   

6. Configure alicloud image

   mkdir -p /etc/docker
   
   tee /etc/docker/daemon.json <<-'EOF' 
   { 
   	"registry-mirrors": ["https://82m9ar63.mirror.aliyuncs.com"]
   }
   EOF
   
   systemctl daemon-reload
   
   systemctl restart docker
   

   The address can be changed into your own , Log in to alicloud Console after , Get into Container image service Then choose Image accelerator You can see that .
   
   Come here docker The installation and configuration of are completed .

mysql Installation and configuration

1. Download the image file

   docker pull mysql:5.7
   

2. Create an instance and start

   docker run -p 3306:3306 --name mysql \
   -v /mydata/mysql/log:/var/log/mysql \
   -v /mydata/mysql/data:/var/lib/mysql \
   -v /mydata/mysql/conf:/etc/mysql \
   -e MYSQL_ROOT_PASSWORD=root \
   -d mysql:5.7
   

   Parameter description
   -p 3306:3306： The container of 3306 Port mapping to host's 3306 port
   -v /mydata/mysql/conf:/etc/mysql： Mount the configuration folder to the host
   -v /mydata/mysql/log:/var/log/mysql： Mount the log folder to the host
   -v /mydata/mysql/data:/var/lib/mysql/： Mount the configuration folder to the host
   -e MYSQL_ROOT_PASSWORD=root： initialization root User's password

   The function of mount is ： It can be directly used in the current host environment mysql Change the file in the container , If you don't mount it , You have to go through docker exec -i -t mysql /bin/bash Enter the container and modify the file .

3. To configure mysql

   It is mainly to modify the character code to utf-8.

   vi /mydata/mysql/conf/my.cnf
   

   The content is ：

   [client]
   default-character-set=utf8
   
   [mysql]
   default-character-set=utf8
   
   [mysqld]
   init_connect='SET collation_connection = utf8_unicode_ci'
   init_connect='SET NAMES utf8'
   character-set-server=utf8
   collation-server=utf8_unicode_ci
   skip-character-set-client-handshake
   skip-name-resolve
   

   among skip-name-resolve Used to skip domain name resolution .

redis Installation and configuration

1. Download the image file

   docker pull redis
   

2. establish redis The configuration file

   mkdir -p /mydata/redis/conf
   touch /mydata/redis/conf/redis.conf
   

3. Create an instance and start

   docker run -p 6379:6379 --name redis -v /mydata/redis/data:/data \
   -v /mydata/redis/conf/redis.conf:/etc/redis/redis.conf \
   -d redis redis-server /etc/redis/redis.conf
   

   -p 6379:6379 Port mapping ,: The front represents the host part ,: After that is the container part .
   –name redis Specify the container name , It's convenient to check and operate .
   -v Mount Directory , The rules are the same as port mapping .
   -d redis Indicates background start redis
   redis-server /etc/redis/redis.conf Start with configuration file redis, Load the... In the container conf file , Finally, we found the directory of the mount /usr/local/redis/redis.conf

4. To configure redis Persistence

   By default ,redis Will save data to memory , Once it is restarted, it will disappear , So here we start by modifying the configuration we just created AOF Persistence .

   vi	/mydata/redis/conf/redis.conf
   

   The content is ：

   appendonly yes
   

5. Use redis Mirrored execution redis-cli Command connection

   docker exec -it redis redis-cli