1 | Docker概览 |
2 | Docker版本安装与介绍(略) |
3 | 镜像 |
4 | 容器 |
5 | 镜像与容器 |
6 | 网络管理 |
7 | 数据卷 |
8 | 仓库 |
9 | Dockerfile |
10 | Docker Compose |
1.1Docker和VMare区别? 为什么有了VMware还要用Docker?
1.2Docker的革命性意义
更轻量
环境迁移
docker version
sudo service docker start
ubuntu下存在sudo
权限问题
docker search
Options:
-f, --filter filter Filter output based on conditions provided
--format string Pretty-print search using a Go template (利用go的字符串)
--limit int Max number of search results (default 25)
--no-trunc Don't truncate output
命令格式:
docker search [OPTIONS] TERM
命令参数(OPTIONS):
-f, --filter filter 根据提供的格式筛选结果
--format string 利用Go语言的format格式化输出结果
--limit int 展示最大的结果数,默认25个 (顺序:limit>filter)
--no-trunc 内容全部显示
docker search centos # 通过镜像名进行搜索, 支持名字模糊搜索, 写cen 也可以搜索到 centos
docker search -f is-official=true cent
docker search -f is-official=true --limit 3 redis
docker search --no-trunc centos
镜像查看
docker images 或 docker image ls
作用:
列出本地镜像
命令格式:
docker images [OPTIONS] [REPOSITORY[:TAG]]
或者 docker image ls [OPTIONS] [REPOSITORY[:TAG]]
命令参数(OPTIONS):
-a, --all 展示所有镜像 (默认隐藏底层的镜像)
--no-trunc 不缩略显示
-q, --quiet 只显示镜像ID
镜像下载 docker pull
推荐: docker pull -h 去查看其用法
docker pull [OPTIONS] NAME[:TAG|@DIGEST]
docker pull centos 默认 是 下载 latest
docker pull centos:7
dockr pull ubuntu:16 是没法搜索到的,需要使用 16.04 这样完整的版本号
其实上是根据 IMAGE ID 来进行判断是否下载的, 如果在本地中有目标ID 那么不会下载, 只在本地进行引用
这个在删除的时候可以体现出来
镜像删除 docker rmi 或 docker image rm
作用:
将本地的一个或多个镜像删除 (通过名字和id都可以删除)
命令格式:
docker rmi [OPTIONS] IMAGE [IMAGE...]
或者 docker image rm [OPTIONS] IMAGE [IMAGE...]
命令参数(OPTIONS):
-f, --force 强制删除 (用于在本地已经创建了容器的镜像)
#展示两次删除的区别:
# 第一次删除了引用
# 第二次彻底删除了文件
[root@izuf6csxy0jrgs3azvia67z ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu 16.04 7e87e2b3bf7a 6 weeks ago 117MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
centos latest 1e1148e4cc2c 3 months ago 202MB
[root@izuf6csxy0jrgs3azvia67z ~]# docker rmi centos:7
Untagged: centos:7
[root@izuf6csxy0jrgs3azvia67z ~]# docker rmi centos
Untagged: centos:latest
Untagged: centos@sha256:184e5f35598e333bfa7de10d8fb1cebb5ee4df5bc0f970bf2b1e7c7345136426
Deleted: sha256:1e1148e4cc2c148c6890a18e3b2d2dde41a6745ceb4e5fe94a923d811bf82ddb
Deleted: sha256:071d8bd765171080d01682844524be57ac9883e53079b6ac66707e192ea25956
#展示两个镜像是同一个ID的时候, 不能通过ID 去进行删除
[root@izuf6csxy0jrgs3azvia67z ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu 16.04 7e87e2b3bf7a 6 weeks ago 117MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
centos latest 1e1148e4cc2c 3 months ago 202MB
[root@izuf6csxy0jrgs3azvia67z ~]# docker rmi 1e11
Error response from daemon: conflict: unable to delete 1e1148e4cc2c (must be forced) -image is referenced in multiple repositories
---------------------------------
[root@izuf6csxy0jrgs3azvia67z ~]# docker rmi centos
Untagged: centos:latest
[root@izuf6csxy0jrgs3azvia67z ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu 16.04 7e87e2b3bf7a 6 weeks ago 117MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
[root@izuf6csxy0jrgs3azvia67z ~]# docker rmi 1e11
Untagged: centos:7
Untagged: centos@sha256:184e5f35598e333bfa7de10d8fb1cebb5ee4df5bc0f970bf2b1e7c7345136426
Deleted: sha256:1e1148e4cc2c148c6890a18e3b2d2dde41a6745ceb4e5fe94a923d811bf82ddb
Deleted: sha256:071d8bd765171080d01682844524be57ac9883e53079b6ac66707e192ea25956
镜像保存备份 docker save (强烈推荐要加上版本号)
作用:
将本地的一个或多个镜像打包保存成本地tar文件(输出到STDOUT) (标准输出流,所以需重定向到 xx.tar文件)
命令格式:
docker save [OPTIONS] IMAGE [IMAGE...] (一个或多个同时操作, 借助名字或id均可)
命令参数(OPTIONS):
-o, --output string 指定写入的文件名和路径
#可以使用Name或ID来标记镜像
#会提示使用 -o 或者 > 来进行保存成文件
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu latest 47b19964fb50 4 weeks ago 88.1MB
ubuntu 16.04 7e87e2b3bf7a 6 weeks ago 117MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
centos latest 1e1148e4cc2c 3 months ago 202MB
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker save centos ubuntu:14.04 47b1 centos:7
cowardly refusing to save to a terminal. Use the -o flag or redirect
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker save centos ubuntu:14.04 47b1 centos:7 > linux.tar
[root@izuf6csxy0jrgs3azvia67z docker_demo]# ll
total 486424
-rw-r--r--1 root root 498098176 Mar 10 11:52 linux.tar
[root@izuf6csxy0jrgs3azvia67z docker_demo]# ll
-rw-r--r--1 root root 498098176 Mar 10 11:52 linux.tar
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker save centos ubuntu:14.04 47b1 centos:7 -o linux2.tar
[root@izuf6csxy0jrgs3azvia67z docker_demo]# ll
-rw-------1 root root 498098176 Mar 10 11:54 linux2.tar
-rw-r--r--1 root root 498098176 Mar 10 11:52 linux.tar
镜像备份导入 docker load
作用:
将save命令打包的镜像导入本地镜像库中
命令格式:
docker load [OPTIONS]
命令参数(OPTIONS):
-i, --input string 指定要打入的文件,如没有指定,默认是STDIN
-q, --quiet 不打印导入过程信息
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker rmi ubuntu:latest 7e87 5dbc
....省略控制台输出...
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker load -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker load [OPTIONS]
Load an image from a tar archive or STDIN
Options:
-i, --input string Read from tar archive file, instead of STDIN
-q, --quiet Suppress the load output
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker load -i linux.tar
....省略控制台输出...
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
47b19964fb50 4 weeks ago 88.1MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
centos latest 1e1148e4cc2c 3 months ago 202MB
# 发现存在问题, 经过执行 docker save centos ubuntu:14.04 47b1 centos:7 > linux.tar
# 对应的ubuntu latest 的REPOSITORY和TAG都变成了. 和我们打包备份的时候没有指定版本号有关, 这里需要注意.
镜像重命名 docker tag
作用:
对本地镜像的NAME、TAG进行重命名,并新产生一个命名后镜像
命令格式:
docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]
命令参数(OPTIONS):
无
#事实上这是一个重命名的命令, 这里会增加一个引用, 并不会修改原来的.
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
47b19964fb50 4 weeks ago 88.1MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
centos latest 1e1148e4cc2c 3 months ago 202MB
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker tag -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker tag SOURCE_IMAGE[:TAG] TARGET_IMAGE[:TAG]
Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker tag centos:7 centos:7.4
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
47b19964fb50 4 weeks ago 88.1MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
centos 7.4 1e1148e4cc2c 3 months ago 202MB
centos latest 1e1148e4cc2c 3 months ago 202MB
------------------------------------------------------------------------
#但是如果是的情况, 相当于存在一个没有标签的镜像, 然后重命名之后就变成默认的镜像
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker tag 47b1 ubuntu:latest
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu latest 47b19964fb50 4 weeks ago 88.1MB
ubuntu 14.04 5dbc3f318ea5 6 weeks ago 188MB
centos 7 1e1148e4cc2c 3 months ago 202MB
centos 7.4 1e1148e4cc2c 3 months ago 202MB
centos latest 1e1148e4cc2c 3 months ago 202MB
镜像详细信息 docker image inspect/docker inspect
作用:
查看本地一个或多个镜像的详细信息
命令格式:
docker image inspect [OPTIONS] IMAGE [IMAGE...]
或者 docker inspect [OPTIONS] IMAGE [IMAGE...]
命令参数(OPTIONS):
-f, --format string 利用特定Go语言的format格式输出结果
#查出来的是json字符串
#固定语法
[root@izuf6csxy0jrgs3azvia67z ~]# docker image inspect centos
[
{
"Id": "sha256:1e1148e4cc2c148c6890a18e3b2d2dde41a6745ceb4e5fe94a923d811bf82ddb",
"RepoTags": [
"centos:7",
"centos:7.4",
"centos:latest"
],
"RepoDigests": [],
"Parent": "",
"Comment": "",
"Created": "2018-12-06T00:21:07.135655444Z",
"Container": "1fdbb0fcc184eb795364f7aa5fdc00299d0a2b90d8e26b4696217c22da7f983f",
"ContainerConfig": {
"Hostname": "1fdbb0fcc184",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/sh",
"-c",
"#(nop) ",
"CMD [\"/bin/bash\"]"
],
"ArgsEscaped": true,
"Image": "sha256:b3a68d99a4a4195c6c97c2345b83cb2d6cfd1661247816ac403cf0b584437ad7",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20181205",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS"
}
},
"DockerVersion": "17.06.2-ce",
"Author": "",
"Config": {
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash"
],
"ArgsEscaped": true,
"Image": "sha256:b3a68d99a4a4195c6c97c2345b83cb2d6cfd1661247816ac403cf0b584437ad7",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20181205",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS"
}
},
"Architecture": "amd64",
"Os": "linux",
"Size": 201779604,
"VirtualSize": 201779604,
"GraphDriver": {
"Data": {
"MergedDir": "/var/lib/docker/overlay2/6099b0dfde447cd9b332ac2c0e1cb7d660572a9d8a31a988e1db8d253e717d00/merged",
"UpperDir": "/var/lib/docker/overlay2/6099b0dfde447cd9b332ac2c0e1cb7d660572a9d8a31a988e1db8d253e717d00/diff",
"WorkDir": "/var/lib/docker/overlay2/6099b0dfde447cd9b332ac2c0e1cb7d660572a9d8a31a988e1db8d253e717d00/work"
},
"Name": "overlay2"
},
"RootFS": {
"Type": "layers",
"Layers": [
"sha256:071d8bd765171080d01682844524be57ac9883e53079b6ac66707e192ea25956"
]
},
"Metadata": {
"LastTagTime": "2019-03-10T12:15:26.0800718+08:00"
}
}
]
#上面的信息量太大, 我们可以针对性的查看部分
[root@izuf6csxy0jrgs3azvia67z ~]# docker inspect centos | grep Created
"Created": "2018-12-06T00:21:07.135655444Z",
# 存在问题: 显示的只有当前行
[root@izuf6csxy0jrgs3azvia67z ~]# docker inspect centos | grep Data
"Data": {
#解决办法: 使用固定的go语法
[root@izuf6csxy0jrgs3azvia67z ~]# docker inspect -f "{{json .Id}}" centos
"sha256:1e1148e4cc2c148c6890a18e3b2d2dde41a6745ceb4e5fe94a923d811bf82ddb"
# 其中的 点 表示第一层
[root@izuf6csxy0jrgs3azvia67z ~]# docker inspect -f "{{json .GraphDriver.Data}}" centos
{"MergedDir":"/var/lib/docker/overlay2/6099b0dfde447cd9b332ac2c0e1cb7d660572a9d8a31a988e1db8d253e717d00/merged","UpperDir":"/var/lib/docker/overlay2/6099b0dfde447cd9b332ac2c0e1cb7d660572a9d8a31a988e1db8d253e717d00/diff","WorkDir":"/var/lib/docker/overlay2/6099b0dfde447cd9b332ac2c0e1cb7d660572a9d8a31a988e1db8d253e717d00/work"}
#补充:
docker image inspect -h 和 docker inspect -h 不同, 一个只针对image, 一个是针对docker 对象, 也就是说还包括 容器,网络,数据卷等
镜像历史信息 docker history
作用:
查看本地一个镜像的历史(历史分层)信息
命令格式:
docker history [OPTIONS] IMAGE
命令参数(OPTIONS):
-H, --human 将创建时间、大小进行优化打印(默认为true)
-q, --quiet 只显示镜像ID
--no-trunc 不缩略显示
[root@izuf6csxy0jrgs3azvia67z ~]# docker history centos
IMAGE CREATED CREATED BY SIZE COMMENT
1e1148e4cc2c 3 months ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0B
3 months ago /bin/sh -c #(nop) LABEL org.label-schema.sc… 0B
3 months ago /bin/sh -c #(nop) ADD file:6f877549795f4798a… 202MB
关闭
service docker stop
reboot now
# 这两种方式都会将 所有的运行的容器关闭掉
容器创建 docker create
作用:
利用镜像创建出一个Created 状态的待启动容器
命令格式:
docker create [OPTIONS] IMAGE [COMMAND] [ARG...]
命令参数(OPTIONS):
-t, --tty 分配一个伪TTY,也就是分配虚拟终端
-i, --interactive 即使没有连接,也要保持STDIN打开
--name 为容器起名,如果没有指定将会随机产生一个名称
命令参数(COMMAND\ARG):
COMMAND 表示容器启动后,需要在容器中执行的命令,如ps、ls 等命令
ARG 表示执行 COMMAND 时需要提供的一些参数,如ps 命令的 aux、ls命令的-a等等
-------------------
补充:
docker create --help 查看帮助信息, 不能使用 -h , 因为这里的-h已经作为它用. 类似的还有其他的.
[COMMAND] 用于创建容器带有的命令, 如yum , apt-get ls 等
[ARG] 用于对 [COMMAND] 传递参数 比如 ls -alh
当然, COMMAND其有默认值: /bin/bash 或其它
[root@izuf6csxy0jrgs3azvia67z docker]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z docker]# docker create centos ls -a
8a6a45f9a0d0b8a2590264af688684b4269066ffaafc8fdf8e6a116166d3e66f
[root@izuf6csxy0jrgs3azvia67z docker]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z docker]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8a6a45f9a0d0 centos "ls -a" 18 seconds ago Created stupefied_lichterman
# docker ps 默认不显示 created状态的 容器. 如果要显示需要加 参数 -a
# 如果使用[COMMAND]选项, 那么会覆盖默认的 /bin/bash 命令
[root@izuf6csxy0jrgs3azvia67z docker]# docker create centos
901eec029d7ea5b1f2687334c49c40c59959a8a1a200c0f8aefbd8b7efce81cb
[root@izuf6csxy0jrgs3azvia67z docker]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z docker]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
901eec029d7e centos "/bin/bash" 7 seconds ago Created flamboyant_bartik
8a6a45f9a0d0 centos "ls -a" 2 minutes ago Created stupefied_lichterman
# PORTS 选项标记的是端口映射
# NAMES 会给创建的容器生成一个默认的名字, 当然也可以通过 --name 选项来指定名字
[root@izuf6csxy0jrgs3azvia67z docker]# docker create --name centos-test centos
ba1085bfe9f0ff8a00b2e06a4eb4f62f4b171d695ee865d4a92600ef2b921617
[root@izuf6csxy0jrgs3azvia67z docker]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ba1085bfe9f0 centos "/bin/bash" 3 seconds ago Created centos-test
901eec029d7e centos "/bin/bash" About a minute ago Created flamboyant_bartik
8a6a45f9a0d0 centos "ls -a" 3 minutes ago Created stupefied_lichterman
# 分配
容器启动 docker start
#COMMAND默认值, 会在每次启动该容器的时候都会执行一次.
#但是要显示需要通过 -a 参数来实现
[root@izuf6csxy0jrgs3azvia67z ~]# docker start 6137
6137
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
61374d7c1f72 centos "ls -a" 53 seconds ago Exited (0) 8 seconds ago centos-test
[root@izuf6csxy0jrgs3azvia67z ~]# docker start -a 6137
.
..
.dockerenv
anaconda-post.log
bin
dev
etc
home
lib
lib64
media
mnt
...
#类似Python这种命令执行需要 虚拟一个终端, 同时还要有标准输入和输出才能展示出来.
#在控制台直接输入Python的时候是有输出的.
#所以, 创建的时候需要 -t 才能分配 虚拟终端, -i 才能提供标准输入, 这两者都具备才能运行 python
# 所以, start python的时候, 也需要 有标准输出和输入. 所以需要 -a 和 -i 参数
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
61374d7c1f72 centos "ls -a" 7 minutes ago Exited (0) 4 minutes ago centos-test
[root@izuf6csxy0jrgs3azvia67z ~]# docker create --name python centos python
1d270adb44c8be96bacb5d17d44922e51bc8d984a5fac3afd7a118a3fcfcae27
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d270adb44c8 centos "python" 4 seconds ago Created python
61374d7c1f72 centos "ls -a" 8 minutes ago Exited (0) 5 minutes ago centos-test
[root@izuf6csxy0jrgs3azvia67z ~]# docker start 1d27
1d27
[root@izuf6csxy0jrgs3azvia67z ~]# python
Python 2.7.5 (default, Oct 30 2018, 23:45:53)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()
[root@izuf6csxy0jrgs3azvia67z ~]# docker start -a python
[root@izuf6csxy0jrgs3azvia67z ~]# docker create -ti --name python-new centos python
e4c60ba568f333b1015f05413c9ae7d0e4ac94931497b12d97210a5db9a2ff6c
[root@izuf6csxy0jrgs3azvia67z ~]# docker start -a python-new
Python 2.7.5 (default, Oct 30 2018, 23:45:53)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> quit
quit
^C
[root@izuf6csxy0jrgs3azvia67z ~]# docker start --help
Usage: docker start [OPTIONS] CONTAINER [CONTAINER...]
Start one or more stopped containers
Options:
-a, --attach Attach STDOUT/STDERR and forward signals
--detach-keys string Override the key sequence for detaching a container
-i, --interactive Attach container's STDIN
[root@izuf6csxy0jrgs3azvia67z ~]# docker start -ai python-new
import os
>>> import os
>>> os.dir(".")
Traceback (most recent call last):
File "", line 1, in
AttributeError: 'module' object has no attribute 'dir'
>>> quit()
容器创建并启动 docker run
作用:
利用镜像创建并启动一个容器
命令格式:
docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
命令参数(OPTIONS):查看更多
-t, --tty 分配一个伪TTY,也就是分配虚拟终端
-i, --interactive 即使没有连接,也要保持STDIN打开
--name 为容器起名,如果没有指定将会随机产生一个名称
-d, --detach 在后台运行容器并打印出容器ID
--rm 当容器退出运行后,自动删除容器
命令参数(COMMAND\ARG):
COMMAND 表示容器启动后,需要在容器中执行的命令,如ps、ls 等命令
ARG 表示执行 COMMAND 时需要提供的一些参数,如ps 命令的 aux、ls命令的-a等等
docker run <=> docker create + docker start -a 前台模式
docker run -d <=> docker create + docker start 后台模式
容器关闭 docker stop
补充
docker run -dti --rm centos bash
# 那么当 stop 或 kill 掉容器的时候, 那么容器会被自动删除
[root@izuf6csxy0jrgs3azvia67z ~]# docker stop -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker stop [OPTIONS] CONTAINER [CONTAINER...]
Stop one or more running containers
Options:
-t, --time int Seconds to wait for stop before killing it (default 10)
# 如果不使用 -d 在后台运行, 那么虽然 Python可以起到阻塞作用, 但是一旦 Ctrl+D 退出或 quit()退出之后.
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z ~]# docker run -ti centos python
Python 2.7.5 (default, Oct 30 2018, 23:45:53)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f71a5c68f152 centos "python" 11 seconds ago Exited (0) 6 seconds ago kind_goldwasser
[root@izuf6csxy0jrgs3azvia67z ~]# docker run -dti centos python
f8b7611d03b80c7709306035e4df0b87c63b8fbf9e1c0cb59fa9b62dbb133600
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f8b7611d03b8 centos "python" 3 minutes ago Up 3 minutes nervous_wiles
f71a5c68f152 centos "python" 4 minutes ago Exited (0) 4 minutes ago kind_goldwasser
容器终止 docker kill
作用:
强制并立即关闭一个或多个处于暂停状态或者运行状态的容器
命令格式:
docker kill [OPTIONS] CONTAINER [CONTAINER...]
命令参数(OPTIONS):
-s, --signal string 指定发送给容器的关闭信号 (默认“KILL”信号)
补充
# 使用kill的时候默认发送的是 15)SIGTERM ; (通知即将关掉 , 给时间回收一下内存等) # 使用kill -9 是发送 9)SIGKILL [root@izuf6csxy0jrgs3azvia67z docker_demo]# kill -l 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL 5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE 9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP 21) SIGTTIN 22) SIGTTOU 23) SIGURG 24) SIGXCPU 25) SIGXFSZ 26) SIGVTALRM 27) SIGPROF 28) SIGWINCH 29) SIGIO 30) SIGPWR 31) SIGSYS 34) SIGRTMIN 35) SIGRTMIN+1 36) SIGRTMIN+2 37) SIGRTMIN+3 38) SIGRTMIN+4 39) SIGRTMIN+5 40) SIGRTMIN+6 41) SIGRTMIN+7 42) SIGRTMIN+8 43) SIGRTMIN+9 44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12 47) SIGRTMIN+13 48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14 51) SIGRTMAX-13 52) SIGRTMAX-12 53) SIGRTMAX-11 54) SIGRTMAX-10 55) SIGRTMAX-9 56) SIGRTMAX-8 57) SIGRTMAX-7 58) SIGRTMAX-6 59) SIGRTMAX-5 60) SIGRTMAX-4 61) SIGRTMAX-3 62) SIGRTMAX-2 63) SIGRTMAX-1 64) SIGRTMAX
前提知识点:
Linux其中两种终止进程的信号是:SIGTERM和SIGKILL
SIGKILL信号:无条件终止进程信号。进程接收到该信号会立即终止,不进行清理和暂存工作。该信号不能被忽略、处理和阻塞,它向系统管理员提供了可以杀死任何进程的方法。
SIGTERM信号:程序终结信号,可以由kill命令产生。与SIGKILL不同的是,SIGTERM信号可以被阻塞和终止,以便程序在退出前可以保存工作或清理临时文件等。
docker stop 会先发出SIGTERM信号给进程,告诉进程即将会被关闭。在-t指定的等待时间过了之后,将会立即发出SIGKILL信号,直接关闭容器。
docker kill 直接发出SIGKILL信号关闭容器。但也可以通过-s参数修改发出的信号。
因此会发现在docker stop的等过过程中,如果终止docker stop的执行,容器最终没有被关闭。而docker kill几乎是立刻发生,无法撤销。
此外还有些异常原因也会导致容器被关闭,比如docker daemon重启、容器内部进程运行发生错误等等“异常原因”。
容器暂停 docker pause
作用:
暂停一个或多个处于运行状态的容器
命令格式:
docker pause CONTAINER [CONTAINER...]
命令参数(OPTIONS):
无
注: 涨停也是一个特殊的运行状态
容器取消暂停 docker unpause
作用:
取消一个或多个处于暂停状态的容器,恢复运行
命令格式:
docker unpause CONTAINER [CONTAINER...]
命令参数(OPTIONS):
无
注: 暂停和取消暂停 都是只能运行一次, 重复运行会报错
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f8b7611d03b8 centos "python" 2 days ago Up 10 hours (Paused) nervous_wiles
f71a5c68f152 centos "python" 2 days ago Exited (0) 2 days ago kind_goldwasser
[root@izuf6csxy0jrgs3azvia67z ~]# docker pause f8b7
Error response from daemon: Container f8b7611d03b80c7709306035e4df0b87c63b8fbf9e1c0cb59fa9b62dbb133600 is already paused
容器重启
作用:
重启一个或多个处于运行状态、暂停状态、关闭状态或者新建状态的容器
该命令相当于stop和start命令的结合
命令格式:
docker restart [OPTIONS] CONTAINER [CONTAINER...]
命令参数(OPTIONS):
-t, --time int 重启前,等待的时间,单位秒(默认 10s)
实则是关闭前等待的时间
docker restart <=> docker stop + docker start
容器的详细信息
作用:
查看本地一个或多个容器的详细信息
命令格式:
docker container inspect [OPTIONS] CONTAINER [CONTAINER...]
或者 docker inspect [OPTIONS] CONTAINER [CONTAINER...]
命令参数(OPTIONS):
-f, --format string 利用特定Go语言的format格式输出结果
-s, --size 显示总大小
[root@izuf6csxy0jrgs3azvia67z ~]# docker inspect f8
[
{
"Id": "f8b7611d03b80c7709306035e4df0b87c63b8fbf9e1c0cb59fa9b62dbb133600",
"Created": "2019-03-10T13:27:48.925737681Z",
"Path": "python",
"Args": [],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 13875,
"ExitCode": 0,
"Error": "",
"StartedAt": "2019-03-12T03:57:58.638030916Z",
"FinishedAt": "2019-03-12T03:55:10.114967417Z"
},
"Image": "sha256:1e1148e4cc2c148c6890a18e3b2d2dde41a6745ceb4e5fe94a923d811bf82ddb",
...
...
...
State还可查看容器的状态
[root@izuf6csxy0jrgs3azvia67z ~]# docker inspect -f "{{json .State.Running}}" f8
true
容器日志 docker logs
#显示的是 容器 COMMAND 产生的一些结果
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3f38d39a95 centos "python" 3 minutes ago Up 3 minutes dreamy_lovelace
f8b7611d03b8 centos "python" 2 days ago Up 10 hours nervous_wiles
f71a5c68f152 centos "python" 2 days ago Exited (0) 2 days ago kind_goldwasser
[root@izuf6csxy0jrgs3azvia67z ~]# docker logs 1d
Python 2.7.5 (default, Oct 30 2018, 23:45:53)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
容器重命名 docker rename
作用:
修改容器的名称
命令格式:
docker rename CONTAINER NEW_NAME
命令参数(OPTIONS):
无
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3f38d39a95 centos "python" About an hour ago Up About an hour dreamy_lovelace
f8b7611d03b8 centos "python" 2 days ago Up 12 hours nervous_wiles
f71a5c68f152 centos "python" 2 days ago Exited (0) 2 days ago kind_goldwasser
[root@izuf6csxy0jrgs3azvia67z ~]# docker rename 1d This
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1d3f38d39a95 centos "python" About an hour ago Up About an hour This
f8b7611d03b8 centos "python" 2 days ago Up 12 hours nervous_wiles
f71a5c68f152 centos "python" 2 days ago Exited (0) 2 days ago kind_goldwasser
容器连接 docker attach
作用:
将当前终端的STDIN、STDOUT、STDERR绑定到正在运行的容器的主进程上实现连接
命令格式:
docker attach [OPTIONS] CONTAINER
命令参数(OPTIONS):
--no-stdin 不绑定STDIN
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z ~]# docker run -dti centos bash
6113fc2dd14a609a8dff44a3a363037a1ea45ecd5173fc8c88d26a66d3c55cf3
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6113fc2dd14a centos "bash" 4 seconds ago Up 4 seconds adoring_blackwell
[root@izuf6csxy0jrgs3azvia67z ~]# docker attach 611
#两次ps的的PID不同, 之前的ps -A执行结束, 所以第二次的ps就有新的PID
[root@6113fc2dd14a /]# ps -A
PID TTY TIME CMD
1 pts/0 00:00:00 bash
15 pts/0 00:00:00 ps
[root@6113fc2dd14a /]# ps -A
PID TTY TIME CMD
1 pts/0 00:00:00 bash
16 pts/0 00:00:00 ps
#这里如果退出, 那么相应的也会退出该容器, 容器则变成关闭状态.
[root@6113fc2dd14a /]# exit
exit
#想要再次连接则会报错:
[root@izuf6csxy0jrgs3azvia67z ~]# docker attach 611
You cannot attach to a stopped container, start it first
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6113fc2dd14a centos "bash" 6 minutes ago Exited (0) 2 minutes ago adoring_blackwel
#而attach必须是 运行中的容器, 所以 需要先启动
#进入Python终端
[root@izuf6csxy0jrgs3azvia67z ~]# docker run -dti centos python
e964d014521a36cb229e5e21dda0686a4cfed7e394509f45fe8989aac23c7cdc
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e964d014521a centos "python" About a minute ago Up About a minute friendly_mirzakhani
6113fc2dd14a centos "bash" 14 minutes ago Up About a minute adoring_blackwell
[root@izuf6csxy0jrgs3azvia67z ~]# docker attach e96
>>> print("hello world")
hello world
>>> quit()
#attach 把当前终端的 标准输入, 标准输入, 标准错误流 和 当前容器终端的主进程联系起来. 即PID=1 的进程.
#所以当attach之后会执行 COMMAND 命令, 该命令执行完, 则终端退出.
容器中执行新命令 docker exec
作用:
在容器中运行一个命令
命令格式:
docker exec [OPTIONS] CONTAINER COMMAND [ARG...]
命令参数(OPTIONS):
-d, --detach 后台运行命令
-i, --interactive 即使没连接容器,也将当前的STDIN绑定上
-t, --tty 分配一个虚拟终端
-w, --workdir string 指定在容器中的工作目录
-e, --env list 设置容器中运行时的环境变量
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z ~]# docker run -dti centos python
f73f3758588ba82728a3b7645b1eed3e648ce5b110eeec19b548db909fa04ad6
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f73f3758588b centos "python" 9 seconds ago Up 8 seconds modest_goldberg
[root@izuf6csxy0jrgs3azvia67z ~]# docker exec f7 ps -A
PID TTY TIME CMD
1 pts/0 00:00:00 python
6 ? 00:00:00 ps
[root@izuf6csxy0jrgs3azvia67z ~]# docker exec f7 ps -A
PID TTY TIME CMD
1 pts/0 00:00:00 python
11 ? 00:00:00 ps
[root@izuf6csxy0jrgs3azvia67z ~]# docker exec f7 python
[root@izuf6csxy0jrgs3azvia67z ~]# docker exec -ti f7 python
Python 2.7.5 (default, Oct 30 2018, 23:45:53)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f73f3758588b centos "python" 2 minutes ago Up 2 minutes modest_goldberg
#重点:
#exec 和 attach区别在于不和主进程进行关联, 是以容器子进程的形式存在, 所以其运行不影响容器主进程. 执行结束也不会导致容器直接退出.
而 docker logs 日志打印的只是主进程的日志, exec的日志是没法打印的.
#引入, centos7的docker镜像默认是没有ifconfig模块,需要安装net-tools工具
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@izuf6csxy0jrgs3azvia67z ~]# docker run -dti centos bash
a43634abeb56cd28ad5487807d2ec4aa02ef24a711b8e9c45252614f718c6622
[root@izuf6csxy0jrgs3azvia67z ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a43634abeb56 centos "bash" 3 seconds ago Up 3 seconds frosty_mclaren
[root@izuf6csxy0jrgs3azvia67z ~]# docker exec a4 ifconfig
OCI runtime exec failed: exec failed: container_linux.go:344: starting container process caused "exec: \"ifconfig\": executable file not found in $PATH": unknown
[root@izuf6csxy0jrgs3azvia67z ~]# docker exec a4 yum install -y net-tools
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package net-tools.x86_64 0:2.0-0.24.20131004git.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
net-tools x86_64 2.0-0.24.20131004git.el7 base 306 k
Transaction Summary
================================================================================
Install 1 Package
Total download size: 306 k
Installed size: 918 k
Downloading packages:
warning: /var/cache/yum/x86_64/7/base/packages/net-tools-2.0-0.24.20131004git.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for net-tools-2.0-0.24.20131004git.el7.x86_64.rpm is not installed
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) "
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-6.1810.2.el7.centos.x86_64 (@CentOS)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : net-tools-2.0-0.24.20131004git.el7.x86_64 1/1
Verifying : net-tools-2.0-0.24.20131004git.el7.x86_64 1/1
Installed:
net-tools.x86_64 0:2.0-0.24.20131004git.el7
Complete!
[root@izuf6csxy0jrgs3azvia67z ~]# docker exec a4 ifconfig
eth0: flags=4163 mtu 1500
inet 172.17.0.2 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:ac:11:00:02 txqueuelen 0 (Ethernet)
RX packets 1264 bytes 9634846 (9.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1037 bytes 67850 (66.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 1 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
容器提交 docker commit
作用:
根据容器生成一个新的镜像(会保留原来容器和对原有容器进行的更改)
命令格式:
docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]
命令参数(OPTIONS):
-a, --author string 作者
-c, --change list 为创建的镜像加入Dockerfile命令
-m, --message string 提交信息,类似git commit -m
-p, --pause 提交时暂停容器 (default true)
[root@izuf6csxy0jrgs3azvia67z ~]# docker commit -m "(export) install net-tools" a436 net-tools:v1.0
sha256:311dc06b53aade01b986b9fdebbabde3de00facfb8633736274911046c108304
[root@izuf6csxy0jrgs3azvia67z ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos-net v1.0 cf3acaf1acc4 10 hours ago 280MB
centos latest 1e1148e4cc2c 3 months ago 202MB
容器导出 docker export
作用:
将容器当前的文件系统导出成一个tar文件
命令格式:
docker export [OPTIONS] CONTAINER
命令参数(OPTIONS):
-o, --output string 指定写入的文件,默认是STDOUT
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker export -o centos-net.tar f825
[root@izuf6csxy0jrgs3azvia67z docker_demo]# ll
total 744844
-rw-------1 root root 264616960 Mar 13 22:22 centos-net.tar
-rw-r--r--1 root root 498098176 Mar 10 11:52 linux.tar
容器打包的导入 docker import
作用:
从一个tar文件中导入内容创建一个镜像
命令格式:
docker import [OPTIONS] file|URL|-[REPOSITORY[:TAG]]
命令参数(OPTIONS):
-c, --change list 为创建的镜像加入Dockerfile命令
-m, --message string 导入时,添加提交信息
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker import -h
Flag shorthand -h has been deprecated, please use --help
Usage: docker import [OPTIONS] file|URL|-[REPOSITORY[:TAG]]
Import the contents from a tarball to create a filesystem image
Options:
-c, --change list Apply Dockerfile instruction to the created image
-m, --message string Set commit message for imported image
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker import -m "(export) install net-tools" centos-net.tar centos-net2:v1.0
sha256:c0ff4aa5865696bdd95809180676267f4683029d0dee258a3d2ca45c12a980b8
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos-net2 v1.0 c0ff4aa58656 22 seconds ago 257MB
centos-net v1.0 cf3acaf1acc4 12 hours ago 280MB
ubuntu latest 47b19964fb50 5 weeks ago 88.1MB
centos latest 1e1148e4cc2c 3 months ago 202MB
#docker commit 和 import 的区别:
#commit保留了镜像的详细信息, 用的更多
#import只保留了最后修改的综合的样子
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker history centos
IMAGE CREATED CREATED BY SIZE COMMENT
1e1148e4cc2c 3 months ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0B
3 months ago /bin/sh -c #(nop) LABEL org.label-schema.sc… 0B
3 months ago /bin/sh -c #(nop) ADD file:6f877549795f4798a… 202MB
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker history centos-net:v1.0
IMAGE CREATED CREATED BY SIZE COMMENT
cf3acaf1acc4 12 hours ago bash 78.5MB install net-tools
1e1148e4cc2c 3 months ago /bin/sh -c #(nop) CMD ["/bin/bash"] 0B
3 months ago /bin/sh -c #(nop) LABEL org.label-schema.sc… 0B
3 months ago /bin/sh -c #(nop) ADD file:6f877549795f4798a… 202MB
[root@izuf6csxy0jrgs3azvia67z docker_demo]# docker history centos-net2:v1.0
IMAGE CREATED CREATED BY SIZE COMMENT
c0ff4aa58656 5 minutes ago 257MB (export) install net-tools