什么是docker
Simply put, a container is a sandboxed process on your machine that is isolated from all other processes on the host machine. That isolation leverages kernel namespaces and cgroups, features that have been in Linux for a long time. Docker has worked to make these capabilities approachable and easy to use. To summarize, a container:
- Is a runnable instance of an image. You can create, start, stop, move, or delete a container using the DockerAPI or CLI.
- Can be run on local machines, virtual machines or deployed to the cloud.
- Is portable (can be run on any OS).
- Is isolated from other containers and runs its own software, binaries, and configurations.
什么是Image
When running a container, it uses an isolated filesystem. This custom filesystem is provided by a container image. Since the image contains the container’s filesystem, it must contain everything needed to run an application - all dependencies, configurations, scripts, binaries, etc. The image also contains other configuration for the container, such as environment variables, a default command to run, and other metadata.
下载安装docker
Get Docker | Docker Documentation
创建部署docker
Create an empty file named
Dockerfile.type nul > Dockerfile
Ubuntu部署docker
卸载docker
sudo apt remove docker-desktop
更新包
Update the apt package index and install packages to allow apt to use a repository over HTTPS:
容器的运行环境是隔离的