debian安裝docker

docker的安裝

官方參考：https://docs.docker.com/engine/installation/linux/debian/#debian-jessie-80-64-bit

檢視核心版本

uname -r

debian系統核心版本要大于3.10，否則有些功能會不适用

删除以前的包,Purge any older repositories.

	apt-get purge lxc-docker*
	apt-get purge docker.io*
           

apt-get update
	apt-get install apt-transport-https ca-certificates
	apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
           

vi /etc/apt/sources.list.d/docker.list
           

deb https://apt.dockerproject.org/repo debian-jessie main
	###看你的系統版本是哪一個
	deb https://apt.dockerproject.org/repo debian-wheezy main
           

apt-get update
apt-cache policy docker-engine

apt-get update
apt-get install docker-engine

service docker start
           

拉取鏡像

docker pull ubuntu  
docker pull debian
docker pull centos

###什麼都不加 表示拉取最新的鏡像;上面的相當于

docker pull registry.hub.docker.com/ubuntu:latest
docker pull registry.hub.docker.com/debian:latest
docker pull registry.hub.docker.com/centos:latest
           

還可以從其他地方拉取鏡像

docker pull dl.dockerpool.com:5000/ubuntu
           

也可以制定版本号 docker pull ubuntu:16.04

列出下載下傳的鏡像
[email protected]:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              16.04               c5f1cf30c96b        2 days ago          120.8 MB
ubuntu              latest              c5f1cf30c96b        2 days ago          120.8 MB
ubuntu              12.04               2bffcdf4b693        2 days ago          138.5 MB
debian              latest              bb5d89f9b6cb        2 days ago          125.1 MB
//上面latest和16.04 的ID号是一樣的，說明是同一個鏡像，這兩個标簽名隻不過是兩個快捷方式而已


REPOSITORY  ：來自哪個倉庫
TAG         ：鏡像的标簽資訊
IMAGE ID    ：鏡像的ID号（唯一）
CREATED     ：建立時間
SIZE        ：鏡像大小
           

使用docker inspect id 可以檢視 鏡像的資訊，這裡的id 好可以簡寫 隻寫前面幾位數字

docker search ubuntu

docker search 
           

删除鏡像

docker rmi  ubuntu:16.04
删除了一個快捷方式，
[email protected]:~# docker rmi  ubuntu:16.04
Untagged: ubuntu:16.04
[email protected]:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              latest              c5f1cf30c96b        2 days ago          120.8 MB
debian              latest              bb5d89f9b6cb        2 days ago          125.1 MB


docker rmi  ubuntu:12.04
鏡像被真正删除了
[email protected]:~# docker rmi ubuntu:12.04
Untagged: ubuntu:12.04
Deleted: sha256:2bffcdf4b69366f80dffaaa3f43ccca565b83d796a8127175648b39ce52adc58
Deleted: sha256:703758ffa331980b7c11fbca1db4813374a3b7f2778e591ba992b795b9315c35
Deleted: sha256:3523b968ef93824bf446a00ce6a9936f8d6d1c987b47c7598f5719c856df76bb
Deleted: sha256:9ff16d8b3bd1d2a3c31eeb96b1087608ee68eace4cf31d8c5422e1244b63e6b4
Deleted: sha256:4f8bc2396d6ded3b51005b09880b814d52b9528a78e5eea881e2455cb9c3e2fc
Deleted: sha256:f72a98239aeac82d2e0ccb7772641260daffec80f09fd66d372d440a7e3a02c9
[email protected]:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              16.04               c5f1cf30c96b        2 days ago          120.8 MB
ubuntu              latest              c5f1cf30c96b        2 days ago          120.8 MB
debian              latest              bb5d89f9b6cb        2 days ago          125.1 MB
           

注意:當tag和ID号 唯一對應時，删除tag ，就會删除鏡像

如果使用id号删除鏡像 就會删除所有的标簽，然後删除鏡像

docker rmi id

docker run ubuntu echo "test!"
docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                     PORTS               NAMES
a80c570db9bb        ubuntu              "echo test!"             5 seconds ago       Exited (0) 4 seconds ago                       high_albattani

[email protected]:~# docker rmi c5
Error response from daemon: conflict: unable to delete c5f1cf30c96b (must be forced) - image is being used by stopped container a80c570db9bb

[email protected]:~# docker rmi ubuntu
Error response from daemon: conflict: unable to remove repository reference "ubuntu" (must force) - container a80c570db9bb is using its referenced image c5f1cf30c96b

如果有容器在依賴鏡像在運作，是無法删除的
docker rmi -f ubuntu
           

#這樣做并不好，再次使用docker images 檢視可以看到一些遺留的問題，

需要再次删除

建立一個鏡像

[email protected]:~# docker run -ti ubuntu /bin/bash
[email protected]:/# echo "this is a new">>/root/123.txt
[email protected]:/# 
[email protected]:/# cat /root/123.txt 
this is a new

[email protected]:/# exit
exit
[email protected]:~# docker commit -m "add a new file" -a "123" 89a17c6a7fb5 test
sha256:31b2d73e250187d3639b5b0f893701d7da83dbecaa5dd0f36e43c102fe0e1f7d
[email protected]:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
test                latest              31b2d73e2501        11 seconds ago      120.8 MB
ubuntu              latest              c5f1cf30c96b        2 days ago          120.8 MB
debian              latest              bb5d89f9b6cb        2 days ago          125.1 MB
           

可以看到建立了另外的一個鏡像

儲存鏡像

docker save -o test.tar  test