docker - Jay's some notes

目录 [隐藏]

I. docker
II. docs
- image
- container
III. dirs

I. docker

install
初次安装；
http proxy
http 代理
Get Started
详细介绍 images、container、service、stack概念和层次关系，梳理docker基本操作。
Docker overview
Dockerfile reference
dockerfile 语法参考。
Compose file version 3 reference
service 描述文件 compose file语法参考。
docker ps 命令
https://docs.docker.com/engine/reference/commandline/ps/
docker container 操作命令
https://docs.docker.com/engine/reference/commandline/container/

II. docs

image

Command	Description
docker image build	Build an image from a Dockerfile
docker image history	Show the history of an image
docker image import	Import the contents from a tarball to create a filesystem image
docker image inspect	Display detailed information on one or more images
docker image load	Load an image from a tar archive or STDIN
docker image ls	List images
docker image prune	Remove unused images
docker image pull	Pull an image or a repository from a registry
docker image push	Push an image or a repository to a registry
docker image rm	Remove one or more images
docker image save	Save one or more images to a tar archive (streamed to STDOUT by default)
docker image tag	Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE

container

Command	Description
docker container attach	Attach local standard input, output, and error streams to a running container
docker container commit	Create a new image from a container’s changes
docker container cp	Copy files/folders between a container and the local filesystem
docker container create	Create a new container
docker container diff	Inspect changes to files or directories on a container’s filesystem
docker container exec	Run a command in a running container
docker container export	Export a container’s filesystem as a tar archive
docker container inspect	Display detailed information on one or more containers
docker container kill	Kill one or more running containers
docker container logs	Fetch the logs of a container
docker container ls	List containers
docker container pause	Pause all processes within one or more containers
docker container port	List port mappings or a specific mapping for the container
docker container prune	Remove all stopped containers
docker container rename	Rename a container
docker container restart	Restart one or more containers
docker container rm	Remove one or more containers
docker container run	Run a command in a new container
docker container start	Start one or more stopped containers
docker container stats	Display a live stream of container(s) resource usage statistics
docker container stop	Stop one or more running containers
docker container top	Display the running processes of a container
docker container unpause	Unpause all processes within one or more containers
docker container update	Update configuration of one or more containers
docker container wait	Block until one or more containers stop, then print their exit codes

III. dirs

有些疑问，先前错误的理解了image和container的关系，以为container是运行时（running time）的image，其实原文描述的意思是可运行的（runable）。然后可运行的container的再区分正在运行和为未运行的。

那么还有一个问题，docker image和container各自在磁盘的哪里？是否可以备份和删除。

graph LR
a[Dockerfile]--docker build-->b[image]--docker create-->c[containner]-- "docker (container) start"-->d[running]
b--docker run-->d

# tree -L 2 /var/lib/docker
/var/lib/docker
├── builder
│   └── fscache.db
├── buildkit
│   ├── cache.db
│   ├── content
│   ├── executor
│   ├── metadata.db
│   └── snapshots.db
├── containers          #容器相关配置文件
│   ├── 8e0a0480df05d9ed5f048d8bfe00c7b5735cb22376409126127c3f59407cd629
│   ├── 9892bfd530a1851985b1791c78b0001d420713647cb93cf71a050f1f97c85353
│   └── c64403de18d9435c935b4a9a3fdf2fd3a4ade8da03624e32702c3083186e7efc
├── image
│   └── overlay2       #镜像，不包含镜像文件，看起是配置文件；
├── network
│   └── files
├── overlay2           #容器、镜像、容器运行差异文件；
│   ├── 1f3492ed2c3ed859daa533057e8b05d667f8401f64c7dfb59033b45489a62bf2
│   ├── 2604ee693ddb1e99bfcb3da7b0cc9653dcb0e49c91d6ba0d2efb74cc90a3331a
│   ├── 2604ee693ddb1e99bfcb3da7b0cc9653dcb0e49c91d6ba0d2efb74cc90a3331a-init
│   ├── 60b8db6fd346f67d3ef86008a6d9cda264ae23307b7645724083a4b454ac5428
│   ├── 71c73bf0c06709216a4b2cb897fc2168d97ab0388a2687764f6f8ae5a4ccdab4
│   ├── 8ea40cec5c4646a32e2068847c8ef36a5d938cbd52e68408854b79f2736f9cb7
│   ├── 8ea40cec5c4646a32e2068847c8ef36a5d938cbd52e68408854b79f2736f9cb7-init
│   ├── bf0565d56baeb559a41271e4b6de85111486ff71542d8198b406e04a977e80c4
│   ├── bf0565d56baeb559a41271e4b6de85111486ff71542d8198b406e04a977e80c4-init
│   ├── fc9daf65ce0b47bb9f46d528bda503cfaab55ef0eeda58bc09f52453f3c73215
│   └── l
├── plugins
│   ├── storage
│   └── tmp
├── runtimes
├── swarm
├── tmp
├── trust
└── volumes
    └── metadata.db