I didn’t plan to use Docker to configure services at first: although Docker can indeed save the trouble of configuring the environment, I always feel uncomfortable somewhere (mistake). Actually, it’s because the server doesn’t run for a long time and will be shut down/restarted from time to time, and I have to restart it in Docker. And it is said that there are security risks (in fact, other software will have security risks if configured improperly 233) But now I’m really bored + there are still many software based on Docker (or only provide Docker installation tutorials, which is annoying), so I plan to deploy the core services directly on the server, and put some unimportant things in Docker. Now, let’s begin!
Install Docker#
Based on https://mirrors.tuna.tsinghua.edu.cn/help/docker-ce/
If it is a fresh installation (and using Minimal installation), Docker is not pre-installed. If you have it, please uninstall it first. Check if Docker is present:
rpm -qa | grep Docker
Uninstall Docker:
yum remove docker docker-common docker-selinux docker-engine
Install dependencies:
yum install -y yum-utils device-mapper-persistent-data lvm2
Download repo file:
wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo
Replace the software repository address (here is TUNA) (When will our school also have an open source software mirror library?)
sed -i 's+download.docker.com+mirrors.tuna.tsinghua.edu.cn/docker-ce+' /etc/yum.repos.d/docker-ce.repo
Install Docker:
yum makecache fast
yum install -y docker-ce
Start Docker:
systemctl start docker
Using Docker#
List all containers:
docker ps -a
Start a container (using container ID):
docker start *containerID*
Similarly, stop stop, restart restart, clear rm, view mapped ports port, view logs logs.
Create a container and run it in the background and enter the background container:
docker run -itd --name *yourname* *container*
docker exec -it *containerID*