docker-简单操作

docker 架构

docker使用C/S架构，Client通过接口与Server进程通信实现容器的构建、运行与发布。

获取镜像

[root@node1 ~]# docker image pull nginx:1.14-alpine

查看镜像列表

[root@node1 ~]# docker image ls
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               1.14-alpine         c5b6f731fbc0        4 weeks ago         17.7MB

启动容器

1、docker run(一步完成创建+启动)

[root@node1 ~]# docker run --name web01 -d nginx:1.14-alpine
4795ee55e7e67e2224253917253b4e0b0fbb32da53d5a7869917bf034b83f0d3
[root@node1 ~]# docker container ls
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
4795ee55e7e6        nginx:1.14-alpine   "nginx -g 'daemon of…"   35 seconds ago      Up 33 seconds       80/tcp              web01

2、docker create + docker start

[root@node1 ~]# docker create --name web01 nginx:1.14-alpine
fac034deb8a7fd6d49bb094ffcea4744f5b87e864c63dc508ea119a32d3fa475
[root@node1 ~]# docker start web01
web01
[root@node1 ~]# docker container ls
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
fac034deb8a7        nginx:1.14-alpine   "nginx -g 'daemon of…"   45 seconds ago      Up 2 seconds        80/tcp              web01

查看容器相关信息，获取分配的IPAddress并访问，可以看到一个简易的nginx搭建完毕。

[root@node1 ~]# docker inspect web01

删除镜像

[root@node1 ~]# docker rmi busybox
Untagged: busybox:latest
Untagged: busybox@sha256:7964ad52e396a6e045c39b5a44438424ac52e12e4d5a25d94895f2058cb863a0
Deleted: sha256:3a093384ac306cbac30b67f1585e12b30ab1a899374dabc3170b9bca246f1444
Deleted: sha256:683f499823be212bf04cb9540407d8353803c25d0d9eb5f2fdb62786d8b95ead

删除容器

[root@node1 ~]# docker container ls
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
125c76bcd270        redis:4-alpine      "docker-entrypoint.s…"   9 minutes ago       Up 9 minutes        6379/tcp            kvstor1
fac034deb8a7        nginx:1.14-alpine   "nginx -g 'daemon of…"   20 minutes ago      Up 20 minutes       80/tcp              web01
[root@node1 ~]# docker container ls -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                      PORTS               NAMES
09e758d3d8a7        busybox:latest      "sh"                     28 seconds ago      Exited (0) 24 seconds ago                       b1
125c76bcd270        redis:4-alpine      "docker-entrypoint.s…"   9 minutes ago       Up 9 minutes                6379/tcp            kvstor1
fac034deb8a7        nginx:1.14-alpine   "nginx -g 'daemon of…"   20 minutes ago      Up 20 minutes               80/tcp              web01
[root@node1 ~]# docker container rm b1
b1
[root@node1 ~]# docker container ls -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
125c76bcd270        redis:4-alpine      "docker-entrypoint.s…"   9 minutes ago       Up 9 minutes        6379/tcp            kvstor1
fac034deb8a7        nginx:1.14-alpine   "nginx -g 'daemon of…"   21 minutes ago      Up 20 minutes       80/tcp              web01

进入容器

[root@node1 ~]# docker container exec -it kvstor1 /bin/sh
/data # 
/data # netstat -tln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       
tcp        0      0 0.0.0.0:6379            0.0.0.0:*               LISTEN      
tcp        0      0 :::6379                 :::*                    LISTEN

docker 命令状态图