Docker基本用法

  • 什么是Docker
  • OCI和OCF
    • OCI
    • OCF
  • Docker架构
  • Docker对象
  • Docker的安装和使用
  • Docker的安装
    • Docker加速
  • Docker常用操作

什么是Docker

docker中的容器：
lxc --> libcontainer --> runC

OCI和OCF

OCI

Open Container-initiative

  • 由Linux基金会主导于2015年6月创立
  • 旨在围绕容器格式和运行时制定一个开放的工业化标准
  • contains two specifications (包含两个规格)
    the Runtime Specification（runtime-spec）（运行规范）
    the Image Specification（image-spec）（形象规范）

OCF

Open Container Format（打开容器格式）
runC is a CLI tool for spawning and running containers according to the OCI specification（runC是一个CLI工具，用于根据OCI规范生成和运行容器）

  • Containers are started as a child process of runC and can be embedded into various other systems without having to run a daemon（容器作为runC的子进程启动，可以嵌入到各种其他系统中，而不需要运行守护进程）
  • runC is built on libcontainer, the same container technology powering millions of Docker Engine installations（runC是基于libcontainer构建的，同样的容器技术为数百万的Docker引擎安装提供了动力）

Docker提供了一个专门容纳镜像的站点，可以个人上传打包好的镜像：https://hub.docker.com/

Docker架构


现实工作中Client客户端和Docker_HOST服务端是在一台主机上的，是不会使用本地docker管理其他主机上的容器的。
Registry：这个是容器仓库，里面放着各种软件的容器仓库，软件容器仓库中又放着各种版本的镜像文件。

镜像是静态的，而容器是动态的，容器有其生命周期，镜像与容器的关系类似于程序与进程的关系。镜像类似于文件系统中的程序文件，而容器则类似于将一个程序运行起来的状态，也即进程。所以容器是可以删除的，容器被删除后其镜像是不会被删除的。

Docker对象

When you use docker, you are creating and using images, containers, networks, volumes, pluginns, and other objects.（当你使用Docker容器时，你可以创建和使用图像、容器、网络、卷、插件和其他对象）

IMAGES（镜像）

  • An image is a read-only template with instructions for creating a docker container.（镜像是一个只读的，用来创建容器的模板）

  • Often, an image is based on another image, with some additional customization.（通常，一个镜像是基于另外一个镜像的做的，加上一些自定义的操作）

  • You might create your own images or you might only use those created by others and published in a registry.（您可以创建自己的映像，也可以只使用其他人创建并在注册表中发布在官网仓库中的镜像）
    CONTAINERS（容器）

  • A conntainer is a runnable instance of an image.（一个容器时一个镜像运行起来生成的）

  • You can create, run, stop, move, or delete a container using the docker API or CLI.（您可以通过docker AP(一种接口)I或CLI(命令行功能)创建、运行、停止、移动或删除容器。）

  • You can connect a container to one or more networks, attach storage to it, or even create a new image based on its current state.（你可以连接一个容器到一个或多个网络，附加存储到里面，就是将容器的数据挂载到那个存储中不放在本地。基于当前的状态创建一个镜像，这里的状态是指安装了某一个服务的情况下创建一个镜像）

Docker的安装和使用

Docker的安装

下载docker的repo源仓库

[root@localhost yum.repos.d]# ls
CentOS-Stream-AppStream.repo         epel-modular.repo
CentOS-Stream-BaseOS.repo            epel-next.repo
CentOS-Stream-Debuginfo.repo         epel-next-testing.repo
CentOS-Stream-Extras.repo            epel-playground.repo
CentOS-Stream-HighAvailability.repo  epel.repo
CentOS-Stream-Media.repo             epel-testing-modular.repo
CentOS-Stream-PowerTools.repo        epel-testing.repo
CentOS-Stream-RealTime.repo//从网上下载docker源
[root@localhost yum.repos.d]# curl -o docker-ce.repo https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo% Total    % Received % Xferd  Average Speed   Time    Time     Time  CurrentDload  Upload   Total   Spent    Left  Speed0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:-  0     0    0     0    0     0      0      0 --:--:--  0:00:02 --:-100  1919  100  1919    0     0    692      0  0:00:02  0:00:02 --:--:--   692
[root@localhost yum.repos.d]# ls
CentOS-Stream-AppStream.repo         docker-ce.repo     //下载好的docker的repo源仓库
CentOS-Stream-BaseOS.repo            epel-modular.repo
CentOS-Stream-Debuginfo.repo         epel-next.repo
CentOS-Stream-Extras.repo            epel-next-testing.repo
CentOS-Stream-HighAvailability.repo  epel-playground.repo
CentOS-Stream-Media.repo             epel.repo
CentOS-Stream-PowerTools.repo        epel-testing-modular.repo
CentOS-Stream-RealTime.repo          epel-testing.repo//跟改repo的内容，把国外地址改成国内地址
[root@localhost yum.repos.d]# sed -i 's@https://download.docker.com@https://mirrors.tuna.tsinghua.edu.cn/docker-ce@g' docker-ce.repo//安装docker
[root@localhost ~]# yum  -y install docker-ce

Docker加速

docker-ce的配置文件是/etc/docker/daemon.json，此文件默认不存在，需要我们手动创建并进行配置，而docker的加速就是通过配置此文件来实现的。刚安装完成后默认是没有这个文件路径，但是启动docker后悔自动在/etc/下生成docker目录，但是没有文件，这个文件需要我们自己手动创建。
docker的加速有多种方式：

  • docker cn
  • 中国科技大学加速器
  • 阿里云加速器（需要通过阿里云开发者平台注册帐号，免费使用个人私有的加速器）

这里我们演示使用阿里云云加速器

启动容器

//启动并设置为开机自启，这样就会在etc下生成docker这个目录。
[root@localhost ~]# systemctl enable --now docker.service
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
[root@localhost ~]# ls /etc/docker/
key.json

第一步：
注册一个阿里云账号，如果已经有账户从第二步开始，直接登陆即可。
第二步：
登陆账户

第三步：
首先点击控制台然后再点击最左侧的菜单，在里面找到容器镜像服务点击进去

第四步：
同样在左侧点击镜像工具中的加速器，然后选择合适的系统类型，然后按照区域②中官网的指导配置即可。

cat > /etc/docker/daemon.json <<EOF
{"registry-mirrors": ["https://yeqglrmy.mirror.aliyuncs.com"]
}
EOF//重新启动docker
[root@localhost ~]# systemctl restart docker//查看docker版本号信息
[root@localhost ~]# docker version
Client: Docker Engine - CommunityVersion:           20.10.11API version:       1.41Go version:        go1.16.9Git commit:        dea9396Built:             Thu Nov 18 00:36:58 2021OS/Arch:           linux/amd64Context:           defaultExperimental:      trueServer: Docker Engine - CommunityEngine:Version:          20.10.11API version:      1.41 (minimum version 1.12)Go version:       go1.16.9Git commit:       847da18Built:            Thu Nov 18 00:35:20 2021OS/Arch:          linux/amd64Experimental:     falsecontainerd:Version:          1.4.12GitCommit:        7b11cfaabd73bb80907dd23182b9347b4245eb5drunc:Version:          1.0.2GitCommit:        v1.0.2-0-g52b36a2docker-init:Version:          0.19.0GitCommit:        de40ad0//查看docker的信息
[root@localhost ~]# docker info
Client:Context:    defaultDebug Mode: false     //调试开发模式：否Plugins:app: Docker App (Docker Inc., v0.9.1-beta3)buildx: Build with BuildKit (Docker Inc., v0.6.3-docker)scan: Docker Scan (Docker Inc., v0.9.0)Server:Containers: 0    Running: 0     //运行的容器Paused: 0       //停止的容器Stopped: 0     //暂停的容器Images: 0       //已有的镜像个数Server Version: 20.10.11Storage Driver: overlay2Backing Filesystem: xfs   //存储文件类型Supports d_type: trueNative Overlay Diff: trueuserxattr: falseLogging Driver: json-fileCgroup Driver: cgroupfsCgroup Version: 1Plugins:Volume: localNetwork: bridge host ipvlan macvlan null overlayLog: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslogSwarm: inactiveRuntimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runcDefault Runtime: runcInit Binary: docker-initcontainerd version: 7b11cfaabd73bb80907dd23182b9347b4245eb5drunc version: v1.0.2-0-g52b36a2init version: de40ad0Security Options:seccompProfile: defaultKernel Version: 4.18.0-257.el8.x86_64Operating System: CentOS Stream 8    //系统OSType: linuxArchitecture: x86_64    //系统平台CPUs: 2    //CPUTotal Memory: 3.901GiB    //内容大小Name: localhost.localdomainID: H2T3:GDHL:XY6Q:ODU4:5WP2:Q26N:G6LU:XJ4I:DHVH:PCQO:DEFE:XSKMDocker Root Dir: /var/lib/dockerDebug Mode: falseRegistry: https://index.docker.io/v1/Labels:Experimental: falseInsecure Registries:127.0.0.0/8Registry Mirrors:      //加速的地址https://yeqglrmy.mirror.aliyuncs.com/Live Restore Enabled: false

Docker常用操作

命令 功能
docker search Search the Docker Hub for images（在docker hub官网上搜索镜像）
docker pull Pull an image or a repository from a registry(从registry也就是官网拉取一个镜像到本地来)
docker images List images (列出本地镜像)
docker create Create a new conntainer (创建一个容器，镜像可以是本地的也可以是网络上的)
docker start Start one or more stopped containers(启动容器)
docker run Run a command in a new container(创建一个容器，并且创建后就自动启动)
docker attach Attach to a runninng container (附加到容器，并让容器在前台运行，但是不能做任何操作)
docker ps List containers(查看此时正在运行的容器)
docker logs Fetch the logs of a container (查看容器的日志)
docker restart Restart a container(重启容器)
docker stop Stop one or more running containers (停止容器 -15)
docker kill Kill one or more running containers(强制杀死容器) -9
docker rm Remove onne or more containers (删除容器)
docker exec Run a command in a running container (进入到容器，)
docker info Display system-wide information(查看docker的信息)
docker inspect Return low-level information on Docker objects(显示容器的详细信息)
  • docker search
[root@localhost ~]# docker search nginx
NAME                              DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
nginx                             Official build of Nginx.                        15899     [OK]
jwilder/nginx-proxy               Automated Nginx reverse proxy for docker con…   2098                 [OK]
richarvey/nginx-php-fpm           Container running Nginx + PHP-FPM capable of…   819                  [OK]
jc21/nginx-proxy-manager          Docker container for managing Nginx proxy ho…   285
linuxserver/nginx                 An Nginx container, brought to you by LinuxS…   160
......
......
## STARS受欢迎程度   OFFICIAL官方提供
  • docker pull
    从官网拉取一个镜像，如果不指定版本号，那么就拉取最新版本的
[root@localhost ~]# docker pull  nginx
Using default tag: latest
latest: Pulling from library/nginx
eff15d958d66: Pull complete
1e5351450a59: Pull complete
2df63e6ce2be: Pull complete
9171c7ae368c: Pull complete
020f975acd28: Pull complete
266f639b35ad: Pull complete
Digest: sha256:097c3a0913d7e3a5b01b6c685a60c03632fc7a2b50bc8e35bcaa3691d788226e
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
  • docker images
    列出本地的镜像
[root@localhost ~]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
nginx        latest    ea335eea17ab   2 weeks ago   141MB
  • docker create
    创建一个容器，如果本地没有就从网路上拉取一个
[root@localhost ~]# docker create nginx
7ff021ca1387c957d576e1c37eee73fd6e7d2e5c5670062499714f190c48df0a//网络上拉取
[root@localhost ~]# docker create busybox
Unable to find image 'busybox:latest' locally
latest: Pulling from library/busybox
3aab638df1a9: Pull complete
Digest: sha256:52817dece4cfe26f581c834d27a8e1bcc82194f914afe6d50afad5a101234ef1
Status: Downloaded newer image for busybox:latest
99e09feb5beddea3ef6a1efcc98ae60eb3ccea48d3c2a7de6825d1d9d50e83dc
[root@localhost ~]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED        SIZE
busybox      latest    d23834f29b38   31 hours ago   1.24MB
nginx        latest    ea335eea17ab   2 weeks ago    141MB[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND                  CREATED              STATUS         PORTS     NAMES
99e09feb5bed   busybox   "sh"                     About a minute ago   Created                  hopeful_bouman
  • docker start
    启动容器
[root@localhost ~]# docker ps -a   //列出本地所有的容器，包括停止和运行中的
CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS    PORTS     NAMES
7ff021ca1387   nginx     "/docker-entrypoint.…"   16 seconds ago   Created             determined_moore[root@localhost ~]# docker start 7ff021ca1387   //启动ID为7ff021ca1387  nginx的容器
7ff021ca1387[root@localhost ~]# docker ps   //列出本地在运行的容器
CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS     NAMES
7ff021ca1387   nginx     "/docker-entrypoint.…"   5 minutes ago   Up 2 minutes   80/tcp    determined_moore
  • docker restart
    重新启动容器
[root@localhost ~]# docker restart 7ff021ca1387
7ff021ca1387
[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS        PORTS     NAMES
7ff021ca1387   nginx     "/docker-entrypoint.…"   6 minutes ago   Up 1 second   80/tcp    determined_moore
## 1秒前启动
  • docker attach
    让容器在前台运行，此时是不能做任何操作的，如果这个时候退出则服务也会退出停止
[root@localhost ~]# docker attach 7ff021ca1387# Ctrl+c退出[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
  • docker run

选项：

-a, --attach=[] 登录容器（以docker run -d启动的容器）
-c, --cpu-shares=0 设置容器CPU权重，在CPU共享场景使用
–cap-add=[] 添加权限
–cap-drop=[] 删除权限
–cidfile="" 运行容器后，在指定文件中写入容器PID值，一种典型的监控系统用法
–cpuset="" 设置容器可以使用哪些CPU，此参数可以用来容器独占CPU
-d, --detach=false 指定容器运行于前台还是后台
–device=[] 添加主机设备给容器，相当于设备直通
–dns=[] 指定容器的dns服务器
–dns-search=[] 指定容器的dns搜索域名，写入到容器的/etc/resolv.conf文件
-e, --env=[] 指定环境变量，容器中可以使用该环境变量
–entrypoint="" 覆盖image的入口点
–env-file=[] 指定环境变量文件，文件格式为每行一个环境变量
–expose=[] 指定容器暴露的端口，即修改镜像的暴露端口
-h, --hostname="" 指定容器的主机名
-i, --interactive=false 打开STDIN，用于控制台交互
–link=[] 指定容器间的关联，使用其他容器的IP、env等信息
–lxc-conf=[] 指定容器的配置文件，只有在指定–exec-driver=lxc时使用
-m, --memory="" 指定容器的内存上限
–name="" 指定容器名字，后续可以通过名字进行容器管理，links特性需要使用名字
–net=“bridge” 容器网络设置，待详述
-P, --publish-all=false 指定容器暴露的端口，待详述
-p, --publish=[] 指定容器暴露的端口，待详述
–privileged=false 指定容器是否为特权容器，特权容器拥有所有的capabilities
–restart="" 指定容器停止后的重启策略，待详述
–rm=false 指定容器停止后自动删除容器(不支持以docker run -d启动的容器)
–sig-proxy=true 设置由代理接受并处理信号，但是SIGCHLD、SIGSTOP和SIGKILL不能被代理
-t, --tty=false 分配tty设备，该可以支持终端登录
-u, --user="" 指定容器的用户
-v, --volume=[] 给容器挂载存储卷，挂载到容器的某个目录
–volumes-from=[] 给容器挂载其他容器上的卷，挂载到容器的某个目录
-w, --workdir="" 指定容器的工作目录

[root@localhost ~]# docker run -it busybox /bin/sh
/ # ls
bin   dev   etc   home  proc  root  sys   tmp   usr   var
/ # ls ~
/ #
/ # exit[root@localhost ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS                          PORTS     NAMES
034c370b6397   busybox   "/bin/sh"                2 minutes ago    Exited (0) About a minute ago             vibrant_mclaren
  • docker info
root@localhost ~]# docker info
Client:Context:    defaultDebug Mode: false     //调试开发模式：否Plugins:app: Docker App (Docker Inc., v0.9.1-beta3)buildx: Build with BuildKit (Docker Inc., v0.6.3-docker)scan: Docker Scan (Docker Inc., v0.9.0)Server:Containers: 0    Running: 0     //运行的容器Paused: 0       //停止的容器Stopped: 0     //暂停的容器Images: 0       //已有的镜像个数Server Version: 20.10.11Storage Driver: overlay2Backing Filesystem: xfs   //存储文件类型Supports d_type: trueNative Overlay Diff: trueuserxattr: falseLogging Driver: json-fileCgroup Driver: cgroupfsCgroup Version: 1Plugins:Volume: localNetwork: bridge host ipvlan macvlan null overlayLog: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslogSwarm: inactiveRuntimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runcDefault Runtime: runcInit Binary: docker-initcontainerd version: 7b11cfaabd73bb80907dd23182b9347b4245eb5drunc version: v1.0.2-0-g52b36a2init version: de40ad0Security Options:seccompProfile: defaultKernel Version: 4.18.0-257.el8.x86_64Operating System: CentOS Stream 8    //系统OSType: linuxArchitecture: x86_64    //系统平台CPUs: 2    //CPUTotal Memory: 3.901GiB    //内容大小Name: localhost.localdomainID: H2T3:GDHL:XY6Q:ODU4:5WP2:Q26N:G6LU:XJ4I:DHVH:PCQO:DEFE:XSKMDocker Root Dir: /var/lib/dockerDebug Mode: falseRegistry: https://index.docker.io/v1/Labels:Experimental: falseInsecure Registries:127.0.0.0/8Registry Mirrors:      //加速的地址https://yeqglrmy.mirror.aliyuncs.com/Live Restore Enabled: false
  • docker rm
    删除容器，rm后面可以跟容器ID 或者一下方式删除所有没有在运行的容器。需要注意的是删除容器只能删除不在运行的，如果容器在运行需要先停止再删除，或者docker rm -f 强制删除-f
[root@localhost ~]# docker rm $(docker ps -aq)
f3f7a8568962
034c370b6397
cf00ddaac86e
72a3728d218d
99e09feb5bed
7ff021ca1387[root@localhost ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
  • docker inspect
    查看容器的详细详细
[root@localhost ~]# docker inspect 38a57540c5b2
[{"Id": "38a57540c5b2277be606c5a3a2b98b0f2f71bb474c4f6eeaf8d6f1c31347457b","Created": "2021-12-01T12:07:13.225060036Z","Path": "httpd-foreground","Args": [],"State": {"Status": "running","Running": true,"Paused": false,"Restarting": false,"OOMKilled": false,"Dead": false,
......"Gateway": "172.17.0.1","IPAddress": "172.17.0.2",   //容器的IP地址"IPPrefixLen": 16,"IPv6Gateway": "","GlobalIPv6Address": "","GlobalIPv6PrefixLen": 0,"MacAddress": "02:42:ac:11:00:02","DriverOpts": null}}}}
]//访问容器，因为这是httpd服务容器 所以会有内容
[root@localhost ~]# curl 172.17.0.2
<html><body><h1>It works!</h1></body></html>
  • docker logs
    查看容器的日志文件
[root@localhost ~]# docker logs 38a57540c5b2
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
[Wed Dec 01 12:07:35.666179 2021] [mpm_event:notice] [pid 1:tid 139798211771712] AH00489: Apache/2.4.51 (Unix) configured -- resuming normal operations
[Wed Dec 01 12:07:35.695263 2021] [core:notice] [pid 1:tid 139798211771712] AH00094: Command line: 'httpd -D FOREGROUND'
172.17.0.1 - - [01/Dec/2021:12:12:29 +0000] "GET / HTTP/1.1" 200 45
172.17.0.1 - - [01/Dec/2021:12:14:12 +0000] "GET / HTTP/1.1" 200 45
172.17.0.1 - - [01/Dec/2021:12:14:13 +0000] "GET / HTTP/1.1" 200 45
172.17.0.1 - - [01/Dec/2021:12:14:13 +0000] "GET / HTTP/1.1" 200 45
172.17.0.1 - - [01/Dec/2021:12:14:14 +0000] "GET / HTTP/1.1" 200 45
172.17.0.1 - - [01/Dec/2021:12:14:15 +0000] "GET / HTTP/1.1" 200 45
172.17.0.1 - - [01/Dec/2021:12:14:15 +0000] "GET / HTTP/1.1" 200 45    //前面访问这个http服务的记录
  • exec
    进入到容器中（最常用），并且exec也不会停止运行，也就是后台运行
[root@localhost ~]# docker exec -it 38a57540c5b2 /bin/bash
## -it交互模式进去
root@38a57540c5b2:/usr/local/apache2# ls
bin    cgi-bin  error   icons    logs
build  conf     htdocs  include  modules
root@38a57540c5b2:/usr/local/apache2# cd bin/
root@38a57540c5b2:/usr/local/apache2/bin# ls
ab         dbmmanage    htcacheclean  httpd       suexec
apachectl  envvars      htdbm         httxt2dbm
apxs       envvars-std  htdigest      logresolve
checkgid   fcgistarter  htpasswd      rotatelogs
  • docker info → 显示系统范围的信息
[root@localhost ~]# docker info
Client:Context:    defaultDebug Mode: falsePlugins:app: Docker App (Docker Inc., v0.9.1-beta3)buildx: Build with BuildKit (Docker Inc., v0.6.3-docker)scan: Docker Scan (Docker Inc., v0.9.0)Server:Containers: 0Running: 0Paused: 0Stopped: 0Images: 0Server Version: 20.10.11Storage Driver: overlay2Backing Filesystem: xfsSupports d_type: trueNative Overlay Diff: trueuserxattr: falseLogging Driver: json-fileCgroup Driver: cgroupfsCgroup Version: 1Plugins:Volume: localNetwork: bridge host ipvlan macvlan null overlayLog: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslogSwarm: inactiveRuntimes: runc io.containerd.runc.v2 io.containerd.runtime.v1.linuxDefault Runtime: runcInit Binary: docker-initcontainerd version: 7b11cfaabd73bb80907dd23182b9347b4245eb5drunc version: v1.0.2-0-g52b36a2init version: de40ad0Security Options:seccompProfile: defaultKernel Version: 3.10.0-862.el7.x86_64Operating System: CentOS Linux 7 (Core)OSType: linuxArchitecture: x86_64CPUs: 2Total Memory: 1.779GiBName: localhost.localdomainID: BYNG:CDGP:V62W:5NS4:CQPZ:ZCHU:N2YY:DMF6:CDVT:WMOJ:ZQW4:D7IPDocker Root Dir: /var/lib/dockerDebug Mode: falseRegistry: https://index.docker.io/v1/Labels:Experimental: falseInsecure Registries:127.0.0.0/8Live Restore Enabled: false
  • docker inspect → 返回有关Docker对象的详细信息
[root@localhost ~]# docker inspect 2dd4b4019147
[{"Id": "2dd4b4019147f7409a5bb78869a508149c15e6449412323076564df76f1d12d0","Created": "2021-12-01T14:58:17.480606425Z","Path": "httpd-foreground","Args": [],"State": {"Status": "running","Running": true,"Paused": false,"Restarting": false,"OOMKilled": false,"Dead": false,"Pid": 40723,"ExitCode": 0,"Error": "","StartedAt": "2021-12-01T14:58:17.767659939Z","FinishedAt": "0001-01-01T00:00:00Z"},"Image": "sha256:ad17c88403e2cedd27963b98be7f04bd3f903dfa7490586de397d0404424936d","ResolvConfPath": "/var/lib/docker/containers/2dd4b4019147f7409a5bb78869a508149c15e6449412323076564df76f1d12d0/resolv.conf","HostnamePath": "/var/lib/docker/containers/2dd4b4019147f7409a5bb78869a508149c15e6449412323076564df76f1d12d0/hostname","HostsPath": "/var/lib/docker/containers/2dd4b4019147f7409a5bb78869a508149c15e6449412323076564df76f1d12d0/hosts","LogPath": "/var/lib/docker/containers/2dd4b4019147f7409a5bb78869a508149c15e6449412323076564df76f1d12d0/2dd4b4019147f7409a5bb78869a508149c15e6449412323076564df76f1d12d0-json.log","Name": "/infallible_thompson","RestartCount": 0,"Driver": "overlay2","Platform": "linux","MountLabel": "","ProcessLabel": "","AppArmorProfile": "","ExecIDs": null,"HostConfig": {"Binds": null,"ContainerIDFile": "","LogConfig": {"Type": "json-file","Config": {}},"NetworkMode": "default","PortBindings": {},"RestartPolicy": {"Name": "no","MaximumRetryCount": 0},"AutoRemove": false,"VolumeDriver": "","VolumesFrom": null,"CapAdd": null,"CapDrop": null,"CgroupnsMode": "host","Dns": [],"DnsOptions": [],"DnsSearch": [],"ExtraHosts": null,"GroupAdd": null,"IpcMode": "private","Cgroup": "","Links": null,"OomScoreAdj": 0,"PidMode": "","Privileged": false,"PublishAllPorts": false,"ReadonlyRootfs": false,"SecurityOpt": null,"UTSMode": "","UsernsMode": "","ShmSize": 67108864,"Runtime": "runc","ConsoleSize": [0,0],"Isolation": "","CpuShares": 0,"Memory": 0,"NanoCpus": 0,"CgroupParent": "","BlkioWeight": 0,"BlkioWeightDevice": [],"BlkioDeviceReadBps": null,"BlkioDeviceWriteBps": null,"BlkioDeviceReadIOps": null,"BlkioDeviceWriteIOps": null,"CpuPeriod": 0,"CpuQuota": 0,"CpuRealtimePeriod": 0,"CpuRealtimeRuntime": 0,"CpusetCpus": "","CpusetMems": "","Devices": [],"DeviceCgroupRules": null,"DeviceRequests": null,"KernelMemory": 0,"KernelMemoryTCP": 0,"MemoryReservation": 0,"MemorySwap": 0,"MemorySwappiness": null,"OomKillDisable": false,"PidsLimit": null,"Ulimits": null,"CpuCount": 0,"CpuPercent": 0,"IOMaximumIOps": 0,"IOMaximumBandwidth": 0,"MaskedPaths": ["/proc/asound","/proc/acpi","/proc/kcore","/proc/keys","/proc/latency_stats","/proc/timer_list","/proc/timer_stats","/proc/sched_debug","/proc/scsi","/sys/firmware"],"ReadonlyPaths": ["/proc/bus","/proc/fs","/proc/irq","/proc/sys","/proc/sysrq-trigger"]},"GraphDriver": {"Data": {"LowerDir": "/var/lib/docker/overlay2/59806da4fa41ad1fabf77b620307211cd490f177e1ce9e593084ca01a06a12c2-init/diff:/var/lib/docker/overlay2/36ed93e176c0efdde307d3bc1d79afde06b98ce5d55e8a5559f9d52898fa700f/diff:/var/lib/docker/overlay2/da05fe4a138adfa74195fbe6b7d48a1e33b7bdef9991dc56f0d41c9dce0dee6c/diff:/var/lib/docker/overlay2/9c7068052b46318736e32d7e970398f0fe7df8a749201bcf60c692f410cba13d/diff:/var/lib/docker/overlay2/1953bf937cd0997d8b717ca69f3c0384de3497ff7292af506c90eb4d371ad2d0/diff:/var/lib/docker/overlay2/c69f8634857d44cd89525b782bd5c39014984e753f7ebc5b6c3e661577c87b3b/diff","MergedDir": "/var/lib/docker/overlay2/59806da4fa41ad1fabf77b620307211cd490f177e1ce9e593084ca01a06a12c2/merged","UpperDir": "/var/lib/docker/overlay2/59806da4fa41ad1fabf77b620307211cd490f177e1ce9e593084ca01a06a12c2/diff","WorkDir": "/var/lib/docker/overlay2/59806da4fa41ad1fabf77b620307211cd490f177e1ce9e593084ca01a06a12c2/work"},"Name": "overlay2"},"Mounts": [],"Config": {"Hostname": "2dd4b4019147","Domainname": "","User": "","AttachStdin": false,"AttachStdout": false,"AttachStderr": false,"ExposedPorts": {"80/tcp": {}},"Tty": false,"OpenStdin": false,"StdinOnce": false,"Env": ["PATH=/usr/local/apache2/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin","HTTPD_PREFIX=/usr/local/apache2","HTTPD_VERSION=2.4.51","HTTPD_SHA256=20e01d81fecf077690a4439e3969a9b22a09a8d43c525356e863407741b838f4","HTTPD_PATCHES="],"Cmd": ["httpd-foreground"],"Image": "httpd","Volumes": null,"WorkingDir": "/usr/local/apache2","Entrypoint": null,"OnBuild": null,"Labels": {},"StopSignal": "SIGWINCH"},"NetworkSettings": {"Bridge": "","SandboxID": "08e39e54dcab30e7d01e8dd0c9d69668a39e2afab86cd846fad09e217fbb8b50","HairpinMode": false,"LinkLocalIPv6Address": "","LinkLocalIPv6PrefixLen": 0,"Ports": {"80/tcp": null},"SandboxKey": "/var/run/docker/netns/08e39e54dcab","SecondaryIPAddresses": null,"SecondaryIPv6Addresses": null,"EndpointID": "15b1dcd50fb8583744379ec7a65a6bbccf8e4fe76c81ef57ebdf36e817395f6f","Gateway": "172.17.0.1","GlobalIPv6Address": "","GlobalIPv6PrefixLen": 0,"IPAddress": "172.17.0.4","IPPrefixLen": 16,"IPv6Gateway": "","MacAddress": "02:42:ac:11:00:04","Networks": {"bridge": {"IPAMConfig": null,"Links": null,"Aliases": null,"NetworkID": "1e342ac6b2af20d51aa467e89ce0d41f754e4daca47beb34de0a6c0de81750d2","EndpointID": "15b1dcd50fb8583744379ec7a65a6bbccf8e4fe76c81ef57ebdf36e817395f6f","Gateway": "172.17.0.1","IPAddress": "172.17.0.4","IPPrefixLen": 16,"IPv6Gateway": "","GlobalIPv6Address": "","GlobalIPv6PrefixLen": 0,"MacAddress": "02:42:ac:11:00:04","DriverOpts": null}}}}
]
[root@localhost ~]# curl 172.17.0.4
<html><body><h1>It works!</h1></body></html>

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