Docker 容器相关操作 #
#docker container run -d nginx
#docker container run -ti ubuntu <<< 安全退出 Ctrl+P && Ctrl+Q
#docker container attach <CONTAINER ID>
#docker container exec -it <CONTAINER ID>
#docker ps -l //查看最新创建的容器
#docker ps -q //查看容器ID
#docker ps -a //查看所有容器， 包括已经停止的
#docker logs <CONTAINER ID> //查看log
#docker container stop //发送TERN信号等待10s后， 如果容器没停止发送KILL信号
#docker container kill //发送KILL信号，容器立刻停止
#docker container rm //删除已停止的容器， --force 强制删除
#docker container rm $(docker ps -aq) --force
#docker container inspect <CONTAINER ID> //会打印出容器的详细信息
#docker container diff <CONTAINER ID> //查看容器
#docker run -it busybox
//容器之间共享namespace
#docker container run –d --name infra --ipc=shareable google/pause
#docker container run –tid --name busybox01 \
--pid=container:infra \
--ipc=container:infra \
--net=container:infra busybox
#docker container run –tid --name busybox02 \
--pid=container:infra \
--ipc=container:infra \
--net=container:infra busybox
查看 namespace
//查看namespace
[root@localhost ~]# docker container top 6a
UID PID PPID C STIME TTY TIME CMD
root 85420 85403 0 12:07 pts/0 00:00:00 sh
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# lsns -p 85420
NS TYPE NPROCS PID USER COMMAND
4026531837 user 160 1 root /usr/lib/systemd/systemd --switched-root --system --deserialize 22
4026532680 ipc 3 85208 root /pause
4026532681 pid 3 85208 root /pause
4026532683 net 3 85208 root /pause
4026532753 mnt 1 85420 root sh
4026532754 uts 1 85420 root sh
[root@localhost ~]#
Docker 文件系统
//docker 文件系统：
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 4.8G 46G 10% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 20M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/sda1 1014M 152M 863M 15% /boot
/dev/mapper/centos-home 142G 33M 142G 1% /home
overlay 50G 4.8G 46G 10% /var/lib/docker/overlay2/7fd4fe6c93f7996c9751098d0f7288bd911f4d5cdd474f09a3f45e94f48ec67a/merged
overlay 50G 4.8G 46G 10% /var/lib/docker/overlay2/6ef794bb4b4961c4006f0a239e68feab742609291777b08631c4665d851195c4/merged
overlay 50G 4.8G 46G 10% /var/lib/docker/overlay2/4fadac2b7b13aff99ffed42990e293270a7aec57f80fe42d4b14736fec84bd4b/merged
overlay 50G 4.8G 46G 10% /var/lib/docker/overlay2/27e3827db6450f1a6e98f9b735ab8addfa3007147385ab4e8a12f787d35c9253/merged
tmpfs 1.6G 0 1.6G 0% /run/user/0
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# cd /var/lib/docker/overlay2/27e3827db6450f1a6e98f9b735ab8addfa3007147385ab4e8a12f787d35c9253/merged
[root@localhost merged]# ls
bin dev entrypoint.sh etc home lib media mnt opt proc root run sbin srv sys tmp usr var
[root@localhost merged]# pwd
/var/lib/docker/overlay2/27e3827db6450f1a6e98f9b735ab8addfa3007147385ab4e8a12f787d35c9253/merged
[root@localhost merged]# exot
-bash: exot: command not found
[root@localhost merged]#
Docker 镜像相关操作 #
#docker search <NAME>
#docker image pull
#docker image run
#docker image ls
#docker image history
# docker image history 1e4467b07108 --no-trunc
#docker image save
#docker image save nginx –o /mnt/nginx.tar.gz
#docker image save nginx > /mnt/nginx.tar.gz
#docker image load
#docker image load –i nginx.tar.gz
#docker image load < nginx.tar.gz
#docker image rm
#docker image tag
Docker container commit 手动构建 Image
- Docker container run 运行容器
- 修改容器
- Docker commit 将容器保存为新的镜像
[root@localhost merged]# docker container commit e13a9d6dfded myubuntu
sha256:9de078569932b64a4b07879692fd13fed2b4bd0eaace4f15befa1ee67180909c
[root@localhost merged]#
[root@localhost merged]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
myubuntu latest 9de078569932 10 seconds ago 97.8MB
镜像的 tag
- docker image tag 命令用于给镜像打标签
- 标签一般标记 image 版本，开发者等相关的信息
- 一个镜像可以有多个标签，它们最终指向同一个 image id
- 标签的特殊用途 – “物流信息”
- docker image tag aa20 quay.io/alice/clock:v1
- docker image push quay.io/alice/clock:v1
- quay.io 是 registry 的地址，在使用 docker hub 以外的 registry 时，必须加上
- 这里面的 alice，称为 namespace，一般是和用户名关联
- clock 是 alice namespace 下的其中一个仓库，一个仓库中一般含有一个应用的多个版本
- v1 标记仓库中的某一个版本的应用的镜像
- Namespace 可以为空，我们称这样的仓库为顶层仓库，一般预留给像 centos, ubuntu 等官方镜像使用
推送镜像到 Docker hub
[root@localhost merged]# docker container commit 23950da8e736 testbusybox
sha256:aaf33ea2c57b7cceeb52524e877834f3ec0bdbd8eb19fb4566782af4adb1257d
[root@localhost merged]#
[root@localhost merged]# docker image tag testbusybox xuxing123/docker_test:v1
[root@localhost merged]#
[root@localhost merged]# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: xuxing123
Password:
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
[root@localhost merged]# docker image push xuxing123/docker_test:v1
The push refers to repository [docker.io/xuxing123/docker_test]
4f42a2914972: Pushed
514c3a3e64d4: Mounted from library/busybox
v1: digest: sha256:80abd9df785cc13a34a10148ba1a45389b215431110ceb2b75e43049d5d9bc8d size: 734
[root@localhost merged]# docker image tag --help
Usage: docker image tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]
Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
[root@localhost merged]#