docker 常用操作
docker 操作
docker
[root@localhost ~]# docker --version
Docker version 20.10.2, build 2291f61
[root@localhost ~]# docker info
Client:
Context: default
Debug Mode: false
Plugins:
app: Docker App (Docker Inc., v0.9.1-beta3)
buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
Server:
Containers: 5
Running: 1
Paused: 0
Stopped: 4
Images: 3
Server Version: 20.10.2
Storage Driver: overlay2
Backing Filesystem: xfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 1
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 269548fa27e0089a8b8278fc4fc781d7f65a939b
runc version: ff819c7e9184c13b7c2607fe6c30ae19403a7aff
init version: de40ad0
Security Options:
seccomp
Profile: default
Kernel Version: 3.10.0-957.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 1.953GiB
Name: localhost.localdomain
ID: LJBA:GLRT:HWNT:67PT:RKZX:OMMI:BUHA:S34N:DB3I:UFMC:L7DR:GVPU
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Registry Mirrors: # 镜像加速
http://hub-mirror.c.163.com/
Live Restore Enabled: false
image
container基础
验证container 的start、stop、run、ls 、ls -a
# 当前有三个镜像
[root@localhost ~]# docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
star7th/showdoc latest 621a7b64fc9d 20 hours ago 669MB
busybox latest a77dce18d0ec 9 days ago 1.24MB
nginx latest ae2feff98a0c 3 weeks ago 133MB
# 一个容器都没有启动
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
# 启动一个容器，这个说法并不对，启动容器之前应该先创建一个容器，但创建就是创建，并不会启动
[root@localhost ~]# docker container create nginx
1cdb6125ed01fb2f5a798452809ad2c1bea0a378bb887cf79919e44d1f58916c
#查看容器，一个容器当前状态是 created
[root@localhost ~]# docker container ls -a
ed01 nginx "/docker-entrypoint.…" 状态 Created competent_buck
# 启动容器，启动容器时的名字要用names
[root@localhost ~]# docker container start nginx
Error response from daemon: No such container: nginx
Error: failed to start containers: nginx
[root@localhost ~]# docker container start competent_buck
competent_buck
# ls只会识别到已经启动的，ls -a 会识别到所有的，包括没有启动的；
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS
5ed01 nginx "/docker-entrypoint.…" 4 Up 80/tcp competent_buck
# 通过docker container run 等于create+start
[root@localhost ~]# docker container stop competent_buck
competent_buck
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@localhost ~]# docker container run nginx
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3446faa119 nginx "/docker-entrypoint.…" 31 seconds ago Up 31 seconds 80/tcp dazzling_joliot
# 验证容器stop、pause、物理机重启、kill、之后，内部的资料是否还存在
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3446faa119 nginx "/docker-entrypoint.…" 57 minutes ago Up 57 minutes 80/tcp dazzling_joliot
[root@localhost ~]# docker exec -it dazzling_joliot /bin/bash
root@1d3446faa119:/# touch 8888888888
root@1d3446faa119:/# echo 888888 > 8888888888
root@1d3446faa119:/# exit
exit
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3446faa119 nginx "/docker-entrypoint.…" About an hour ago Up About an hour
80/tcp dazzling_joliot
[root@localhost ~]# docker container stop dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container start dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container start dazzling_joliot
dazzling_joliot
#经过验证stop然后start之后依然存在
[root@localhost ~]# docker container exec -it dazzling_joliot /bin/bash
root@1d3446faa119:/# ls
8888888888
# 经过验证pause和unpause之后依然存在
[root@localhost ~]# docker container pause dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3446faa119 nginx "/docker-entrypoint.…" About an hour ago Up 5 minutes (Paused) 80/tcp dazzling_joliot
[root@localhost ~]# docker container unpause dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container exec -it dazzling_joliot /bin/bash
root@1d3446faa119:/# ls
8888888888
# 经过验证，kill之后，通过start启动之后，依然存在
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3446faa119 nginx "/docker-entrypoint.…" About an hour ago Up 7 minutes 80/tcp dazzling_joliot
[root@localhost ~]# docker container kill dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@localhost ~]# docker container ls -a | grep dazzling_joliot
1d3446faa119 nginx "/docker-entrypoint.…" About an hour ago Exited (137) 22 seconds ago dazzling_joliot
[root@localhost ~]# docker container start dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container exec -it dazzling_joliot /bin/bash
root@1d3446faa119:/# ls
8888888888
# 验证docker容器的删除
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3446faa119 nginx "/docker-entrypoint.…" About an hour ago Up 2 minutes 80/tcp dazzling_joliot
# 容器在启动状态下无法删除
[root@localhost ~]# docker container rm dazzling_joliot
Error response from daemon: You cannot remove a running container 1d3446faa11959c0dd73b0e1d5ee91e46e4678668b5261baf7e3a9a47a1710af. Stop the container before attempting removal or force remove
[root@localhost ~]# docker container stop dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container rm dazzling_joliot
dazzling_joliot
[root@localhost ~]# docker container ls -a | grep dazzling_joliot # 没有了
# 那删除容器之后，再通过镜像启动一个容器，那之前修改的东西还吗？不在了，因为镜像是只读的，下面就来验证一下；
# 删除之后再启动同样的镜像，数据就会没有了，如下所示：
[root@localhost ~]# docker container run -d nginx
16b3893fa42895ac7e977e601d88a1b1d8f7cf0cf12b4e8d18fcc63758e60e80
[root@localhost ~]# docker container run -d nginx
16b3893fa42895ac7e977e601d88a1b1d8f7cf0cf12b4e8d18fcc63758e60e80
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
16b3893fa428 nginx "/docker-entrypoint.…" 31 seconds ago Up 30 seconds 80/tcp laughing_dhawan
[root@localhost ~]# docker container exec -it laughing_dhawan /bin/bash
root@16b3893fa428:/# ls
# 删除操作，删除所有的容器
[root@localhost ~]# docker container ls -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
dbec26507405 star7th/showdoc "docker-php-entrypoi…" Less than a second ago Exited (137) Less than a second ago heuristic_buck
16b3893fa428 nginx "/docker-entrypoint.…" 6 minutes ago Exited (0) 39 seconds ago laughing_dhawan
1cdb6125ed01 nginx "/docker-entrypoint.…" 2 hours ago Exited (0) About an hour ago competent_buck
22bda9eb539c nginx "/docker-entrypoint.…" 2 hours ago Exited (0) 2 hours ago sleepy_greider
6ebc79a349b4 busybox:latest "sh" 15 hours ago Exited (0) 15 hours ago b1
[root@localhost ~]# docker container ls -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
dbec26507405 star7th/showdoc "docker-php-entrypoi…" Less than a second ago Exited (137) Less than a second ago heuristic_buck
16b3893fa428 nginx "/docker-entrypoint.…" 6 minutes ago Exited (0) 39 seconds ago laughing_dhawan
1cdb6125ed01 nginx "/docker-entrypoint.…" 2 hours ago Exited (0) About an hour ago competent_buck
22bda9eb539c nginx "/docker-entrypoint.…" 2 hours ago Exited (0) 2 hours ago sleepy_greider
6ebc79a349b4 busybox:latest "sh" 15 hours ago Exited (0) 15 hours ago b1
[root@localhost ~]# docker container rm heuristic_buck
heuristic_buck
[root@localhost ~]# docker container rm laughing_dhawan
laughing_dhawan
[root@localhost ~]# docker container rm competent_buck
competent_buck
[root@localhost ~]# docker container rm sleepy_greider
sleepy_greider
[root@localhost ~]# docker container rm b1
b1
[root@localhost ~]# docker container ls -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
