Install Docker
automatically using the official installation script.
The installation command is as follows:
curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
can also use the domestic daocloud one-click installation command:
curl -sSL https://get.daocloud.io/docker | sh
Set the warehouse
The mirror warehouse is responsible for the storage and distribution of mirror content. In simple terms, it is a platform for users to download various software.
Install the required packages. yum-utils provides yum-config-manager, and the device mapper storage driver requires device-mapper-persistent-data and lvm2.
$ sudo yum install -y yum-utils device-mapper-persistent-data lvm2
Use the following commands to set up mirror repositories for different websites.
official source
$ sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
Aliyun
$ sudo yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
Tsinghua University source
$ sudo yum-config-manager \
--add-repo \
https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo
install Docker Engine-Community
sudo yum install docker -ce docker-ce-cli containerd.io --allowerasing
installation command can choose parameters –allowerasing, –skip-broken or –nobest, if there are no these parameters, an exception will be prompted:
Try adding '--allowerasing' to the command line to replace conflicting packages or '--skip-broken' to skip packages that cannot be installed or '--nobest' to not only use the best candidate for a package to install
successfully Then enter the command to start docker, as shown below
sudo systemctl start docker
install docker on centos 8
1. The previous version of Yuzai
yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate dokcer-logrotate docker-engin
Yuzai docker-ce (ce stands for community version)
yum remove docker-ce docker-ce-cli containerd.io
delete docker resource
rm -rf /var/lib/docker
2. Install dependent packages
yum install -y yum-utils
3. Set the mirror warehouse (the default is a foreign warehouse, the download is very slow)
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
4. Update yum
yum makecache
5. Install docker
yum install docker-ce docker-ce-cli containerd.io
If you don't want to install the latest version of docker, but want to install a specified version, you can do this:
First check out what versions of docker there are
yum list docker-ce --showduplicates | sort -r
Install the specified version
sudo yum install docker-ce-<version_string> docker-ce-cli-<version_string> containerd.io
For example, to install version 18.09.1:
sudo yum install docker-ce-18.09.1 docker-ce-cli-18.09.1 containerd.io
6. Start docker
sudo systemctl start docker
Check whether the startup is successful
docker version
7. Start docker automatically when booting
systemctl enable docker
8. Run Hello-world image
sudo docker run hellow-world
docker version information:
Run hello-world information:
9. Configure the docker image accelerator
Apply for a container mirror service in the Alibaba Cloud console, and then a mirror accelerator address [https://qiby9901.mirror.aliyuncs.com] will be assigned.
If you have not applied for the Alibaba Cloud Mirror Accelerator, do not configure the daemon.json file. The accelerator can only be accessed on the Alibaba Cloud server intranet.
Create a daemon.json file in the /etc/docker directory.
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": [
"https://qiyb9901.mirror.aliyuncs.com"
]
}
EOF
Save, reload configuration file and restart docker
sudo systemctl daemon-reload sudo systemctl restart docker
10. Install docker visual interface management tool portainer
docker run -d -p 8090:9000 --restart=always -v /var/run/docker.sock:/var/run/docker.sock --privileged=true portainer/portainer
Note that the docker container port must be 9000 to start portainer
Enter in the browser address bar: http://local ip:8090 to access portainer.
Install docker-compose on centos 8
[Step 1] Install docker compose
(1) Download and install docker-compose from a foreign server
Foreign server download address and installation instructions: Install Docker Compose | Docker Documentation
sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose chmod +x /usr/local/bin/docker-compose
The official service is abroad, and the download is very slow. It is recommended to download from the domestic server.
(2) Download and install docker-compose from the domestic server
Domestic server download address and installation instructions: https://get.daocloud.io
curl -L https://get.daocloud.io/docker/compose/releases/download/v2.2.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose chmod +x /usr/local/bin/docker-compose
You can customize the version you need by modifying the version in the URL.
Downloading to the /usr/local/bin directory is the installation. Grant execute permission after the download is complete.
Check whether the download is successful.
ll /usr/local/bin
[Step 2] Verify whether the installation is successful
Verify that docker-compose is installed successfully:
docker-compose --version
[Step 3] Uninstall Docker-Compose
rm /usr/local/bin/docker-compose
docker-compose common commands
Get help for a command
docker-compose command --help
builds and starts all containers, and rebuilds if the image exists
docker-compose up -d --build
starts all services
docker-compose up -d
build starts the nignx container
docker-compose up -d nginx
-f specifies the Compose configuration file to start. The default is docker-compose.yml, which can be specified multiple times.
docker-compose -f docker-compose.yml up -d
run a service and execute a command on the service
docker-compose run container id or container name ip addr
log in to the nginx container
docker-compose exec nginx bash
this command will Stop the container started by the up command and remove the network
docker-compose down
lists all running containers in the project
docker-compose ps
lists all running and non-running containers in the project
docker-compose ps -a
lists all running service containers
docker-compose ls
lists all service containers (including non-running ones)
docker-compose ls -a
restart nginx container
docker-compose restart nginx
build image
docker-compose build nginx
build without cache
docker-compose build --no-cache nginx
view the processes running in each service container
docker-compose top
view nginx’s real-time log
docker-compose logs -f nginx
lists the images contained in the Compose file
docker-compose images
to verify the file configuration. When the configuration is correct, nothing is output. When the file configuration is incorrect, an error message is output.
docker-compose config
outputs the docker log of nginx in the form of json
docker-compose events --json nginx
pause nignx container
docker-compose pause nginx
Restore the ningx container
docker-compose unpause nginx
to delete the container (the container must be closed before deleting, execute stop)
docker-compose rm nginx
forcefully delete the container (the container does not need to be closed first)
docker-compose rm -f nginx
stop the nignx container
docker-compose stop nginx
start nignx container
docker-compose start nginx
restart nignx container in the project
docker-compose restart nginx
download dependent image
docker-compose pull push
service depends on the image
docker-compose push
setting specifies the number of containers that the service runs. Set the number through the parameter of service=num
docker-compose scale web=3 db=2
view version information
docker-compose version
