學習整理來源 B站 狂神說Java https://space.bilibili.com/95256449/
一、docker概述
1、docker為什么會出現
本質：所有技術的出現都是因為出現了一些問題，我們需要去解決，才去研究和學習；
問題：
開發環境、測試環境、仿真環境、正式環境等諸多環境都需要進行頻繁的服務更新、環境維護等；
不同的環境由於成本的問題很難做到完全一致和統一，導致同樣的服務在不同環境出現服務不可用等問題；
docker給以上問題提出的解決方案：帶上運行環境一起打包、更新、上線即可。docker的核心思想就是打包裝箱，每個箱子互相隔離，互不影響。
2、docker為什么火
核心原因：docker十分的輕巧。因為在容器技術出現之前我們使用的都是虛擬技術。
虛擬機：在windows上面安裝一個vmware虛擬機軟件，通過這個軟件我們可以虛擬出多台機器；其實虛擬機屬於虛擬化技術，docker容器技術其實也屬於虛擬化技術。
虛擬機和docker對比：
傳統虛擬機技術：虛擬機相關硬件資源，運行一個完整的操作系統，然后在該操作系統上面安裝和運行相關需要的軟件；
容器技術：容器公用宿主機相關硬件資源，容器沒有自己的內核也沒有虛擬任何硬件，這樣就輕便了許多。每個容器都相互隔離，並且擁有自己的文件系統，互不影響；
3、docker優勢
-
應用更加快速的交付和部署
傳統：一堆幫助文檔和安裝程序；
docker：打包鏡像、發布測試一件運行；
-
更便捷的升級和擴容
使用docker之后，我們部署應用就跟搭積木一樣，項目打包為一個鏡像，可以很方便的擴展容器1、容器2等
-
更簡單的系統維護
docker之后，我們的開發環境、測試環境、線上環境是高度一致的；
-
更高效的計算資源利用
docker是一個內核級別的虛擬化技術，可以在一台物理機上運行多個容器實例。服務器的性能可以被壓榨到極致；
二、docker安裝
1、docker基本組成
-
鏡像（image）
docker鏡像就好比是一個目標，可以通過這個目標來創建容器服務，tomcat鏡像>run>容器（提
供服務器），通過這個鏡像可以創建多個容器（最終服務運行或者項目運行就是在容器中的）。
-
容器（container）
Docker利用容器技術，獨立運行一個或者一組應用，通過鏡像來創建的.
啟動，停止，刪除，基本命令
目前就可以把這個容器理解為就是一個簡易的 Linux系統。
-
倉庫（repository）
倉庫就是存放鏡像的地方！
倉庫分為公有倉庫和私有倉庫。(很類似git)
Docker Hub是國外的。
2、docker安裝
直接yum安裝即可：
#查看linux內核版本
[root@ecs-x-large-2-linux-20200305213344 ~]# uname -r
3.10.0-1160.6.1.el7.x86_64
#查看系統版本詳情
[root@ecs-x-large-2-linux-20200305213344 ~]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
#查看docker是否安裝成功
[root@ecs-x-large-2-linux-20200305213344 ~]# docker version
Client:
Version: 1.13.1
API version: 1.26
Package version: docker-1.13.1-203.git0be3e21.el7.centos.x86_64
Go version: go1.10.3
Git commit: 0be3e21/1.13.1
Built: Thu Nov 12 15:11:46 2020
OS/Arch: linux/amd64
Server:
Version: 1.13.1
API version: 1.26 (minimum version 1.12)
Package version: docker-1.13.1-203.git0be3e21.el7.centos.x86_64
Go version: go1.10.3
Git commit: 0be3e21/1.13.1
Built: Thu Nov 12 15:11:46 2020
OS/Arch: linux/amd64
Experimental: false
#測試docker
[root@ecs-x-large-2-linux-20200305213344 ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
Trying to pull repository docker.io/library/hello-world ...
latest: Pulling from docker.io/library/hello-world
b8dfde127a29: Pull complete
Digest: sha256:89b647c604b2a436fc3aa56ab1ec515c26b085ac0c15b0d105bc475be15738fb
Status: Downloaded newer image for docker.io/hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
#查看下載后的鏡像
[root@ecs-x-large-2-linux-20200305213344 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/hello-world latest d1165f221234 7 hours ago 13.3 kB
docker.io/nginx latest 35c43ace9216 2 weeks ago 133 MB
3、docker運行原理
docker是一個client-server結構的系統，docker的守護進程運行在主機上，通過socker從客戶端訪問。server接收到client指令，就只執行這個命令。
三、docker常用命令
1、幫助命令
docker version #顯示dokcer版本信息
docker info #顯示docker的系統信息，包括鏡像和容器數量
docker 命令 --help #幫助命令
2、鏡像命令
docker images #查看所有本地主機上的鏡像
docker search #搜索某個鏡像
docker pull #下載鏡像
docker rmi #刪除鏡像
docker images #查看所有本地主機上的鏡像
[root@ecs-x-large-2-linux-20200305213344 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/hello-world latest d1165f221234 7 hours ago 13.3 kB
docker.io/nginx latest 35c43ace9216 2 weeks ago 133 MB
#解釋
#REPOSITORY 鏡像的倉庫源
#TAG 鏡像標簽
#IMAGE ID 鏡像id
#CREATED 鏡像創建時間
#SIZE 鏡像大小
#可選項
Options:
-a, --all Show all images (default hides intermediate images)#查看所有鏡像
-q, --quiet Only show numeric IDs #只顯示鏡像id
[root@ecs-x-large-2-linux-20200305213344 ~]# docker images -aq #顯示所有鏡像id
d1165f221234
35c43ace9216
docker pull #下載鏡像
#下載鏡像 docker pull 鏡像名[:tag] 如果不寫tag默認下載最新
[root@ecs-x-large-2-linux-20200305213344 ~]# docker pull redis
Using default tag: latest
Trying to pull repository docker.io/library/redis ...
latest: Pulling from docker.io/library/redis
45b42c59be33: Already exists #分層下載
5ce2e937bf62: Pull complete
2a031498ff58: Pull complete
2f3d47096658: Pull complete
04f5cb8ac4c0: Pull complete
9ed141398658: Pull complete
Digest: sha256:9a1a2bb9fd2bd8b2c15aaca44d8e6ba8bc448df9b7b8d7d24ba4b472e0da1b8a
Status: Downloaded newer image for docker.io/redis:latest #鏡像的真實地址
docker rmi #刪除鏡像
docker rmi -f 鏡像id #刪除指定的鏡像
docker rmi -f 鏡像id 鏡像id #刪除指定的鏡像
docker rmi -f $(docker images -aq) #刪除全部的鏡像
3、容器命令
備注：我們有了鏡像才能創建容器
docker run 鏡像id #新建容器並啟動
docker ps #列出所有運行的容器
docker rm 容器id #刪除指定容器
docker start 容器id #啟動容器
docker restart容器id #重啟容器
docker stop 容器id #停止當前正在運行的容器
docker kill 容器id #強制停止當前容器
#查看容器所有命令
[root@ecs-x-large-2-linux-20200305213344 ~]# docker container
Usage: docker container COMMAND
Manage containers
Options:
--help Print usage
Commands:
attach Attach to a running container
commit Create a new image from a container's changes
cp Copy files/folders between a container and the local filesystem
create Create a new container
diff Inspect changes on a container's filesystem
exec Run a command in a running container
export Export a container's filesystem as a tar archive
inspect Display detailed information on one or more containers
kill Kill one or more running containers
logs Fetch the logs of a container
ls List containers
pause Pause all processes within one or more containers
port List port mappings or a specific mapping for the container
prune Remove all stopped containers
rename Rename a container
restart Restart one or more containers
rm Remove one or more containers
run Run a command in a new container
start Start one or more stopped containers
stats Display a live stream of container(s) resource usage statistics
stop Stop one or more running containers
top Display the running processes of a container
unpause Unpause all processes within one or more containers
update Update configuration of one or more containers
wait Block until one or more containers stop, then print their exit codes
新建容器並啟動
docker runb [可選參數] image
#參數說明
--name =”name“ #容器名字，用於區分不同的的容器
-d #后台運行
-it #使用交互模式運行，進入容器查看相關內容
-p #指定容器端口
-p 主機端口：容器端口
#測試-it
[root@ecs-x-large-2-linux-20200305213344 ~]# docker run -it 300e315adb2f /bin/bash
[root@9f5b41ce646c /]# ls
bin dev etc home lib lib64 lost+found media mnt opt proc root run sbin srv sys tmp usr var
[root@9f5b41ce646c /]# exit #退出容器
exit
#測試 --name -p -d
[root@ecs-x-large-2-linux-20200305213344 ~]# docker run --name nginx01 -d -p 3334:80 35c43ace9216
cacf7a960d29dc24755f6b9896aaa85f2e9f902ff7f620470c907acf5e17bd7a
[root@ecs-x-large-2-linux-20200305213344 ~]# curl localhost:3334
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title> #成功訪問3334端口
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
#測試是否后台運行
[root@ecs-x-large-2-linux-20200305213344 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cacf7a960d29 35c43ace9216 "/docker-entrypoin..." About a minute ago Up About a minute 0.0.0.0:3334->80/tcp nginx01
列出所有運行的容器
#docker ps #列出當前正在運行的容器
Options:
-a, --all Show all containers (default shows just running)#列出目前所有容器
-q, --quiet Only display numeric IDs #只顯示容器id
[root@ecs-x-large-2-linux-20200305213344 ~]# docker ps -aq #顯示所有容器id
9f5b41ce646c
7aab85f14183
退出容器
exit #退出容器
刪除容器
docker rm 容器id #刪除指定的容器，不能刪除正在運行的容器，如果要強制刪除 rm -rf docker
rm -f $(docker ps -aq) #刪除指定的容器
docker ps -a -q|xargs docker rm #刪除所有的容器
啟動和停止容器
docker start 容器id #啟動容器
docker restart 容器id #重啟容器
docker stop 容器id #停止當前正在運行的容器
docker kill 容器id #強制停止當前容器
查看日志
[root@ecs-x-large-2-linux-20200305213344 ~]# docker logs --help
Options:
--details Show extra details provided to logs
-f, --follow Follow log output
--help Print usage
--since string Show logs since timestamp
--tail string Number of lines to show from the end of the logs (default "all")
-t, --timestamps Show timestamps
#顯示日志
-tf #顯示日志信息（一直更新）
--tail number #需要顯示日志條數
docker logs -t --tail n 容器id #查看n行日志 docker logs -ft 容器id #跟着日志
查看容器中的進程信息
#docker top 容器id
[root@ecs-x-large-2-linux-20200305213344 ~]# docker top cacf7a960d29
UID PID PPID C STIME TTY TIME CMD
root 27859 27841 0 16:26 ? 00:00:00 nginx: master process nginx -g daemon off;
101 27908 27859 0 16:26 ? 00:00:00 nginx: worker process
查看容器元數據
#docker inspect 容器id
[root@ecs-x-large-2-linux-20200305213344 ~]# docker inspect cacf7a960d29
[
{
"Id": "cacf7a960d29dc24755f6b9896aaa85f2e9f902ff7f620470c907acf5e17bd7a",
"Created": "2021-03-06T08:26:19.015315592Z",
"Path": "/docker-entrypoint.sh",
"Args": [
"nginx",
"-g",
"daemon off;"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 27859,
"ExitCode": 0,
"Error": "",
"StartedAt": "2021-03-06T08:26:19.32665951Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:35c43ace9216212c0f0e546a65eec93fa9fc8e96b25880ee222b7ed2ca1d2151",
"ResolvConfPath": "/var/lib/docker/containers/cacf7a960d29dc24755f6b9896aaa85f2e9f902ff7f620470c907acf5e17bd7a/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/cacf7a960d29dc24755f6b9896aaa85f2e9f902ff7f620470c907acf5e17bd7a/hostname",
"HostsPath": "/var/lib/docker/containers/cacf7a960d29dc24755f6b9896aaa85f2e9f902ff7f620470c907acf5e17bd7a/hosts",
"LogPath": "",
"Name": "/nginx01",
"RestartCount": 0,
"Driver": "overlay2",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
進入當前正在運行的容器
#我們通常容器都是在后台運行方式，如果需要修改一些配置或其他操作，那么我們需要進入運行的容器
#方式一：docker exec - it容器id /bin/bash
[root@ecs-x-large-2-linux-20200305213344 ~]# docker exec -it cacf7a960d29 /bin/bash
root@cacf7a960d29:/# ls
bin dev docker-entrypoint.sh home lib64 mnt proc run srv tmp var
boot docker-entrypoint.d etc lib media opt root sbin sys usr
#方式二：docker attach 容器id
[root@ecs-x-large-2-linux-20200305213344 ~]# docker attach cacf7a960d29
正在執行的代碼******
[root@ecs-x-large-2-linux-20200305213344 ~]# #ctrl+c 退出
#區別
#docker exec #進入當前容器后開啟一個新的終端，可以在里面操作。（常用）
#docker attach # 進入容器正在執行的終端
從容器內拷貝到主機
#docker cp 容器id：容器內路徑 主機目的路徑
#測試
#進入容器內部
[root@ecs-x-large-2-linux-20200305213344 ~]# docker exec -it cacf7a960d29 /bin/bash
root@cacf7a960d29:/# ls
bin dev docker-entrypoint.sh home lib64 mnt proc run srv tmp var
boot docker-entrypoint.d etc lib media opt root sbin sys usr
#新建一個文件
root@cacf7a960d29:/# echo "hello" >test.java
root@cacf7a960d29:/# ls
bin dev docker-entrypoint.sh home lib64 mnt proc run srv test.java usr
boot docker-entrypoint.d etc lib media opt root sbin sys tmp var
#退出容器
exit
#拷貝
docker cp cacf7a960d29:test.java /home/
#驗證是否copy到主機
[root@ecs-x-large-2-linux-20200305213344 ~]# ls /home/
test.java
commit鏡像
命令：docker commit -m=“描述信息” -a=“作者” 容器id 目標鏡像名：[tag]
實戰測試：
#1、啟動tomcat默認鏡像文件
[root@ecs-x-large-2-linux-20200305213344 ~]# docker run -d -p 3344:8080 bf4709e77b18
7984fe235242c4164dcede5053663a44db96ae89e0035a13e351faab03634d17
#2、查看容器的webapp文件
[root@ecs-x-large-2-linux-20200305213344 ~]# docker exec -it 7984fe235242c4164dcede5053663a44db96ae89e0035a13e351faab03634d17 /bin/bash
root@7984fe235242:/usr/local/tomcat# ls
BUILDING.txt LICENSE README.md RUNNING.txt conf logs temp webapps.dist
CONTRIBUTING.md NOTICE RELEASE-NOTES bin lib native-jni-lib webapps work
root@7984fe235242:/usr/local/tomcat# cd webapps
root@7984fe235242:/usr/local/tomcat/webapps# ls
#3、拷貝webapps.dist下文件到webapps下
root@7984fe235242:/usr/local/tomcat# cp -r webapps.dist/* webapps/
root@7984fe235242:/usr/local/tomcat# ls webapps
ROOT docs examples host-manager manager
root@7984fe235242:/usr/local/tomcat#
#4、將該容器提交為一個新的鏡像文件
[root@ecs-x-large-2-linux-20200305213344 ~]# docker commit -m="梵響測試容器提交為一個新的鏡像" -a="fanxiang" 7984fe235242c4164dcede5053 tomcat01:1.0
sha256:3622a772f2315dc2d22140698a45cc8c30a9c8b5e7fb961937429307669ced92
[root@ecs-x-large-2-linux-20200305213344 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat01 1.0 3622a772f231 12 seconds ago 672 MB
docker.io/hello-world latest d1165f221234 2 days ago 13.3 kB
docker.io/redis 5.0 d00afcde654e 5 days ago 98.4 MB
docker.io/redis latest f877e80bb9ef 5 days ago 105 MB
docker.io/nginx latest 35c43ace9216 2 weeks ago 133 MB
docker.io/tomcat latest bf4709e77b18 3 weeks ago 667 MB
docker.io/centos latest 300e315adb2f 3 months ago 209 MB
save鏡像
[root@ecs-x-large-2-linux-20200305213344 ~]#docker save --help
Usage: docker save [OPTIONS] IMAGE [IMAGE...]
Save one or more images to a tar archive (streamed to STDOUT by default)
Options:
--help Print usage
-o, --output string Write to a file, instead of STDOUT
實戰：
[root@ecs-x-large-2-linux-20200305213344 ~]# docker save -o /home/redis01.tar docker.io/redis:5.0
[root@ecs-x-large-2-linux-20200305213344 ~]# ls /home
redis01.tar test.java tomcat02.tar
load鏡像
[root@ecs-x-large-2-linux-20200305213344 ~]# docker load --help
Usage: docker load [OPTIONS]
Load an image from a tar archive or STDIN
Options:
--help Print usage
-i, --input string Read from tar archive file, instead of STDIN
-q, --quiet Suppress the load output
實戰：
[root@ecs-x-large-2-linux-20200305213344 ~]# docker load -i /home/redis01.tar
01b7eeecc774: Loading layer [==================================================>] 24.7 MB/24.7 MB
f2df42e57d5e: Loading layer [==================================================>] 1.536 kB/1.536 kB
b537eb7339bc: Loading layer [==================================================>] 3.584 kB/3.584 kB
Loaded image: docker.io/redis:5.0
[root@ecs-x-large-2-linux-20200305213344 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/hello-world latest d1165f221234 2 days ago 13.3 kB
docker.io/redis 5.0 d00afcde654e 5 days ago 98.4 MB
docker.io/redis latest f877e80bb9ef 5 days ago 105 MB
docker.io/nginx latest 35c43ace9216 2 weeks ago 133 MB
docker.io/tomcat latest bf4709e77b18 3 weeks ago 667 MB
docker.io/centos latest 300e315adb2f 3 months ago 209 MB
4、命令總結
四、docker鏡像
1、鏡像是什么
鏡像是一種輕量級、可執行的獨立軟件包，用來打包軟件運行環境和基於運行環境開發的軟件，它包含了運行某個軟件所需的所有內容，包括代碼、運行時庫、環境變量和配置問價等。
將所有的應用和環境直接打包成鏡像，就可以直接運行。
2、鏡像分層原理
docker的鏡像實際上由一層一層的文件系統組成，這種層級的文件系統UnionFS。平時我們安裝進虛擬機的CentOS都是好幾個G，為什么Docker這里才200M？
對於個精簡的OS,rootfs可以很小，只需要包合最基本的命令，工具和程序庫就可以了，因為底層直接用 Host的kernel，自己只需要提供rootfs就可以了。由此可見對於不同的Linux發行版， boots基本是一致 的， rootfs會有差別，因此不同的發行版可以公用bootfs. 虛擬機是分鍾級別，容器是秒級！
3、分層理解
[root@ecs-x-large-2-linux-20200305213344 ~]# docker pull redis:5.0
Trying to pull repository docker.io/library/redis ...
5.0: Pulling from docker.io/library/redis
45b42c59be33: Already exists
5ce2e937bf62: Already exists
2a031498ff58: Already exists
ec50b60c87ea: Pull complete
2bf0c804a5c0: Pull complete
6a3615492950: Pull complete
Digest: sha256:6ba62effb31d8d74e6e2dec4b7ef9c8985e7fcc85c4f179e13f622f5785a4135
Status: Downloaded newer image for docker.io/redis:5.0
docker鏡像為什么要采用這種分層的結構呢？
最大的好處，我覺得莫過於資源共享了！比如有多個鏡像都從相同的Base鏡像構建而來，那么宿主機
只需在磁盤上保留一份base鏡像，同時內存中也只需要加載一份base鏡像，這樣就可以為所有的容器
服務了，而且鏡像的每一層都可以被共享。
總結：
所有的 Docker鏡像都起始於一個基礎鏡像層，當進行修改或培加新的內容時，就會在當前鏡像層之
上，創建新的鏡像層。Docker 鏡像都是只讀的，當容器啟動時，一個新的可寫層加載到鏡像的頂部！這一層就是我們通常說的容器層，容器之下的都叫鏡像層！
查看docker鏡像分層信息
命令：docker inspect 鏡像id或鏡像名稱
[root@ecs-x-large-2-linux-20200305213344 ~]# docker inspect d00afcde654e
[
{
"Id": "sha256:d00afcde654e3125384d52fb872c88986d2046fa598a12abcee52ff0d98e7562",
"RepoTags": [
"docker.io/redis:5.0"
],
"RepoDigests": [
"docker.io/redis@sha256:6ba62effb31d8d74e6e2dec4b7ef9c8985e7fcc85c4f179e13f622f5785a4135"
],
"Parent": "",
"Comment": "",
"Created": "2021-03-02T23:29:46.396151327Z",
"Container": "6a7820655f2592fdc2b254036170652520beb98f79a41e6aedc17987ccec3829",
"ContainerConfig": {
"Hostname": "6a7820655f25",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"6379/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"GOSU_VERSION=1.12",
"REDIS_VERSION=5.0.12",
"REDIS_DOWNLOAD_URL=http://download.redis.io/releases/redis-5.0.12.tar.gz",
"REDIS_DOWNLOAD_SHA=7040eba5910f7c3d38f05ea5a1d88b480488215bdbd2e10ec70d18380108e31e"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"redis-server\"]"
],
"Image": "sha256:f43399b52be67a391b4bf53e210c55002a2bce5e4fa5f1021d4dc9725ec7f537",
"Volumes": {
"/data": {}
},
"WorkingDir": "/data",
"Entrypoint": [
"docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": {}
},
"DockerVersion": "19.03.12",
"Author": "",
"Config": {
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"6379/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"GOSU_VERSION=1.12",
"REDIS_VERSION=5.0.12",
"REDIS_DOWNLOAD_URL=http://download.redis.io/releases/redis-5.0.12.tar.gz",
"REDIS_DOWNLOAD_SHA=7040eba5910f7c3d38f05ea5a1d88b480488215bdbd2e10ec70d18380108e31e"
],
"Cmd": [
"redis-server"
],
"Image": "sha256:f43399b52be67a391b4bf53e210c55002a2bce5e4fa5f1021d4dc9725ec7f537",
"Volumes": {
"/data": {}
},
"WorkingDir": "/data",
"Entrypoint": [
"docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": null
},
"Architecture": "amd64",
"Os": "linux",
"Size": 98358570,
"VirtualSize": 98358570,
"GraphDriver": {
"Name": "overlay2",
"Data": {
"LowerDir": "/var/lib/docker/overlay2/343be33bc297acdf8bc2b57b335c025ea76b8d1263548ba269c0aefb81aaf28d/diff:/var/lib/docker/overlay2/3302ce8415cd3a8a1e1e9753eebbb38df5b15cc02fef109e30be41f4310ee810/diff:/var/lib/docker/overlay2/44c8b45db6fd63960703e604f43a4acc5633f09a3a91a8d7263ad2f9bfd0d038/diff:/var/lib/docker/overlay2/5eb368e142c6079aa1f507149216281ca79b5df08ba19bad51390d74dfbf3c1f/diff:/var/lib/docker/overlay2/219cf0492ba08d03dc4f2a5649ec1124fff82ebe22c6f9a0a26ccf303be0e0d1/diff",
"MergedDir": "/var/lib/docker/overlay2/d38f31592715a55459f4556623786c5878014bf8ffdcc1e88506069e32ba75dc/merged",
"UpperDir": "/var/lib/docker/overlay2/d38f31592715a55459f4556623786c5878014bf8ffdcc1e88506069e32ba75dc/diff",
"WorkDir": "/var/lib/docker/overlay2/d38f31592715a55459f4556623786c5878014bf8ffdcc1e88506069e32ba75dc/work"
}
},
"RootFS": {
"Type": "layers",
"Layers": [ #鏡像分層信息
"sha256:9eb82f04c782ef3f5ca25911e60d75e441ce0fe82e49f0dbf02c81a3161d1300",
"sha256:f973e3e0e07c6e9f9418a6dd0c453cd70c7fb87a0826172275883ab4bdb61bf4",
"sha256:c16b4f3a3f99ebbcd59795b54faf4cdf2e00ee09b85124fda5d0746d64237ca6",
"sha256:01b7eeecc774b7669892f89fc8b84eea781263448978a411f0f429b867410fc5",
"sha256:f2df42e57d5eef289656ef8aad072d2828a61e93833e2928a789a88bc2bc1cbc",
"sha256:b537eb7339bcbff729ebdc63a0f910b39ae3d5540663a74f55081b62e92f66e3"
]
}
}
]