docker基本操做1

docker火的一塌糊塗，做爲一名Noder更應該去了解，學習以及應用她了。本篇先去了解下，docker基本的概念和使用，高大上的設計lxc的我也沒看懂呢。

###1 docker的核心組件

1. docker server 和 docker client
2. docker registory
3. docker image
4. docker container

###2 兩個命令 我最經常使用的兩個命令，來了解docker的狀況

suntopo@suntopo-X550VX:~$ sudo docker images
[sudo] password for suntopo: 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              latest              c73a085dc378        2 weeks ago         127.1 MB
redis               latest              1aa84b1b434e        2 weeks ago         182.9 MB
mongo               latest              48b8b08dca4d        5 weeks ago         366.4 MB
redis               <none>              0d1cbfaa41da        5 weeks ago         185 MB
hello-world         latest              c54a2cc56cbb        3 months ago        1.848 kB

查看本機已有的鏡像

suntopo@suntopo-X550VX:~$ sudo docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                  PORTS                        NAMES
97714d985a97        ubuntu              "/bin/bash"              5 days ago          Exited (0) 5 days ago                                modest_babbage
254938ab2e20        0d1cbfaa41da        "docker-entrypoint.sh"   2 weeks ago         Up 4 hours              127.0.0.1:6379->6379/tcp     zen_murdock
0a1a11d5263b        mongo               "/entrypoint.sh mongo"   3 weeks ago         Up 4 hours              127.0.0.1:27017->27017/tcp   berserk_ride

查看本機已有的容器

###3 如何建立一個容器

一般在建立命令的時候大部分會使用一條綜合的命令

suntopo@suntopo-X550VX:~$ sudo docker run -ti ubuntu 
root@435d6d16ed82:/#

可是我的更傾向於使用多條命令

下載鏡像文件

因爲我以前已經下載過，因此這裏會有些不一樣

suntopo@suntopo-X550VX:~$ sudo docker pull ubuntu
Using default tag: latest


latest: Pulling from library/ubuntu
Digest: sha256:28d4c5234db8d5a634d5e621c363d900f8f241240ee0a6a978784c978fe9c737
Status: Image is up to date for ubuntu:latest

建立容器

若是不指定容器的名稱，系統會默認分配一個，這是是furious_mccarthy

suntopo@suntopo-X550VX:~$ sudo docker create -ti ubuntu
fc37b091da0b3e7992ad8bebdfe741392c552cd85dd4446fa8387bc3f212694b
suntopo@suntopo-X550VX:~$ sudo docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                        NAMES
fc37b091da0b        ubuntu              "/bin/bash"              48 seconds ago      Created                                          furious_mccarthy
254938ab2e20        0d1cbfaa41da        "docker-entrypoint.sh"   2 weeks ago         Up 4 hours          127.0.0.1:6379->6379/tcp     zen_murdock
0a1a11d5263b        mongo               "/entrypoint.sh mongo"   3 weeks ago         Up 4 hours          127.0.0.1:27017->27017/tcp   berserk_ride

啓動容器

suntopo@suntopo-X550VX:~$ sudo docker start furious_mccarthy
furious_mccarthy
suntopo@suntopo-X550VX:~$ sudo docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                        NAMES
fc37b091da0b        ubuntu              "/bin/bash"              2 minutes ago       Up 2 seconds                                     furious_mccarthy
254938ab2e20        0d1cbfaa41da        "docker-entrypoint.sh"   2 weeks ago         Up 4 hours          127.0.0.1:6379->6379/tcp     zen_murdock
0a1a11d5263b        mongo

進入容器

suntopo@suntopo-X550VX:~$ sudo docker exec -ti furious_mccarthy /bin/bash
root@fc37b091da0b:/#

###4 刪除

刪除鏡像時，必需要刪除經過該鏡像建立的容器，且刪除該容器時必需要先中止容器

suntopo@suntopo-X550VX:~$ sudo docker stop furious_mccarthy
furious_mccarthy
suntopo@suntopo-X550VX:~$ sudo docker rm furious_mccarthy
furious_mccarthy
suntopo@suntopo-X550VX:~$ sudo docker rmi ubuntu
Untagged: ubuntu:latest
Untagged: ubuntu@sha256:28d4c5234db8d5a634d5e621c363d900f8f241240ee0a6a978784c978fe9c737
Deleted: sha256:c73a085dc3782b3fd4c032971c76d6afb45fa3728a048175c8c77d7403de5f21
Deleted: sha256:d65c79a3def77c232ad966aa21efc1abdaefe84d954de3450a29254a7bc7084b
Deleted: sha256:9baff8efba34fd596f27af307d9e9c6e23b787ddef62e5357aa1fc0ae9514fbb
Deleted: sha256:15d2cdb99f73294ce72eff9c1c90b2462d4239c8b48601e1731cec6e732f986c
Deleted: sha256:ca01bb4a9b1c9d067a07919da3a94803e2851ccfbe68b74de0bd9937a10419f6
Deleted: sha256:040ba7b9591ca6c75584e37195149facf6906d98e3597a9b2d4c1e3889aff633