docker learn
docker 常用命令# docker version
Client:
Version: 17.05.0-ce
API version:1.29
Go version: go1.7.5
Git commit: 89658be
Built: Thu May4 22:06:25 2017
OS/Arch: linux/amd64
Server:
Version: 17.05.0-ce
API version:1.29 (minimum version 1.12)
Go version: go1.7.5
Git commit: 89658be
Built: Thu May4 22:06:25 2017
OS/Arch: linux/amd64
Experimental: false
# docker info
Containers: 3
Running: 1
Paused: 0
Stopped: 2
Images: 29
Server Version: 17.05.0-ce
Storage Driver: overlay
Backing Filesystem: xfs
Supports d_type: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9048e5e50717ea4497b757314bad98ea3763c145
runc version: 9c2d8d184e5da67c95d601382adf14862e4f2228
init version: 949e6fa
Security Options:
seccomp
Profile: default
Kernel Version: 3.10.0-693.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 1.781GiB
Name: localhost.localdomain
ID: QHTO:DMIZ:PMAS:SRXP:KTR4:CH7T:3IKV:6IWK:TRKT:I6VP:CVES:PNSP
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
# docker logs -f 2cff//查看容器日志
WARNING: 'UsePAM no' is not supported in Red Hat Enterprise Linux and may cause several problems.
Could not load host key: /etc/ssh/ssh_host_ecdsa_key
Could not load host key: /etc/ssh/ssh_host_ed25519_key
^C
# docker ps //查看正在运行的容器
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2cff51b765c2 sshdocker "/usr/sbin/sshd -D" 22 minutes ago Up 22 minutes 0.0.0.0:32769->22/tcp mysshdocker
# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2cff51b765c2 sshdocker "/usr/sbin/sshd -D" 22 minutes ago Up 22 minutes 0.0.0.0:32769->22/tcp mysshdocker
2b3b55ec6693 sshdocker "/usr/sbin/sshd -D" 4 hours ago Exited (0) 35 minutes ago mysshdcontainer
2323f1ff98d7 bd0c225f3c21 "/bin/sh -c 'yum i..." 4 hours ago Exited (1) 4 hours ago eager_meitner
# docker ps -a -q//为查看所有的容器，包括已经停止的。
2cff51b765c2
2b3b55ec6693
2323f1ff98d7删除所有容器
docker rm $(docker ps -a -q)
删除单个容器
docker rm <容器名orID>
停止、启动、杀死一个容器
docker stop <容器名orID>
docker start <容器名orID>
docker kill <容器名orID>
查看所有镜像
docker images
删除所有镜像
docker rmi $(docker images | grep none | awk '{print $3}' | sort -r)
运行一个新容器，同时为它命名、端口映射、文件夹映射。以redmine镜像为例
docker run --name redmine -p 9003:80 -p 9023:22 -d -v /var/redmine/files:/redmine/files -v /var/redmine/mysql:/var/lib/mysql sameersbn/redmine
一个容器连接到另一个容器
docker run -i -t --name sonar -d -link mmysql:db tpires/sonar-server
sonar
容器连接到mmysql容器，并将mmysql容器重命名为db。这样，sonar容器就可以使用db的相关的环境变量了。
拉取镜像
docker pull <镜像名:tag>
如
docker pull sameersbn/redmine:latest
# 保存镜像到一个tar包; -o, --output="" Write to an file
$docker save image_name -o file_path
# 加载一个tar包格式的镜像; -i, --input="" Read from a tar archive file
$docker load -i file_path
# 机器a
$docker save image_name > /home/save.tar
# 使用scp将save.tar拷到机器b上，然后：
$docker load < /home/save.tar
eg:
# docker save centos7/ssh:version1-o /home/save.tar
# ls /home/save.tar
/home/save.tar
#
构建自己的镜像
docker build -t <镜像名> <Dockerfile路径>
如Dockerfile在当前路径：
docker build -t xx/gitlab .
eg：
docker build -t centos7:tag1 /root/dockerfile/centos7/
Docker容器进入的方式。转载自 //http://www.cnblogs.com/xhyan/p/6593075.html
docker attach ssh nsenter exec
# docker exec -it 2cff /bin/bash
# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>mtu 1500
inet 172.17.0.2netmask 255.255.0.0broadcast 0.0.0.0
ether 02:42:ac:11:00:02txqueuelen 0(Ethernet)
RX packets 5255bytes 15870393 (15.1 MiB)
RX errors 0dropped 0overruns 0frame 0
TX packets 4615bytes 271329 (264.9 KiB)
TX errors 0dropped 0 overruns 0carrier 0collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING>mtu 65536
inet 127.0.0.1netmask 255.0.0.0
looptxqueuelen 1(Local Loopback)
RX packets 0bytes 0 (0.0 B)
RX errors 0dropped 0overruns 0frame 0
TX packets 0bytes 0 (0.0 B)
TX errors 0dropped 0 overruns 0carrier 0collisions 0
# #
# ssh admin@172.17.0.2
admin@172.17.0.2's password:
$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>mtu 1500
inet 172.17.0.2netmask 255.255.0.0broadcast 0.0.0.0
ether 02:42:ac:11:00:02txqueuelen 0(Ethernet)
RX packets 5289bytes 15875283 (15.1 MiB)
RX errors 0dropped 0overruns 0frame 0
TX packets 4639bytes 275951 (269.4 KiB)
TX errors 0dropped 0 overruns 0carrier 0collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING>mtu 65536
inet 127.0.0.1netmask 255.0.0.0
looptxqueuelen 1(Local Loopback)
RX packets 0bytes 0 (0.0 B)
RX errors 0dropped 0overruns 0frame 0
TX packets 0bytes 0 (0.0 B)
TX errors 0dropped 0 overruns 0carrier 0collisions 0
$ exit
logout
Connection to 172.17.0.2 closed.
# docke ps
-bash: docke: command not found
# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2cff51b765c2 sshdocker "/usr/sbin/sshd -D" 12 minutes ago Up 12 minutes 0.0.0.0:32769->22/tcp mysshdocker重新查看container的stdout
# 启动top命令，后台运行$ ID=$(sudo docker run -d ubuntu /usr/bin/top -b)# 获取正在running的container的输出$ sudo docker attach $ID
top - 02:05:52 up3:05,0 users,load average: 0.01, 0.02, 0.05Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
Cpu(s):0.1%us,0.2%sy,0.0%ni, 99.7%id,0.0%wa,0.0%hi,0.0%si,0.0%st
Mem: 373572k total, 355560k used, 18012k free, 27872k buffers
Swap: 786428k total, 0k used, 786428k free, 221740k cached
^C$
$ sudo docker stop $ID
eg
# docker run -d centos7/ssh /usr/bin/top -b
Unable to find image 'centos7/ssh:latest' locally
^C
# docker run -d centos7/ssh:version1 /usr/bin/top -b
a17fac4b304526346ff0b07b209e1859259914c0b73bd538be11f946b456b101
# docker attach
"docker attach" requires exactly 1 argument(s).
See 'docker attach --help'.
Usage:docker attach CONTAINER
Attach local standard input, output, and error streams to a running container
# docker attach a17fac4b304526346ff0b07b209e1859259914c0b73bd538be11f946b456b101
top - 16:08:55 up 2 days,1:23,0 users,load average: 0.00, 0.07, 0.09
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s):0.1 us,1.8 sy,0.0 ni, 98.1 id,0.0 wa,0.0 hi,0.0 si,0.0 st
KiB Mem :1867048 total, 473488 free, 225960 used,1167600 buff/cache
KiB Swap:2097148 total,2095864 free, 1284 used.1329652 avail Mem
PID USER PRNI VIRT RES SHR S%CPU %MEM TIME+ COMMAND
1 root 20 0 40188 1676 1296 R 0.00.1 0:00.05 top
top - 16:08:58 up 2 days,1:23,0 users,load average: 0.00, 0.07, 0.09
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s):0.0 us,0.0 sy,0.0 ni,100.0 id,0.0 wa,0.0 hi,0.0 si,0.0 st
KiB Mem :1867048 total, 473360 free, 226088 used,1167600 buff/cache
KiB Swap:2097148 total,2095864 free, 1284 used.1329528 avail Mem
PID USER PRNI VIRT RES SHR S%CPU %MEM TIME+ COMMAND
1 root 20 0 40188 1676 1296 R 0.00.1 0:00.05 top
top - 16:09:01 up 2 days,1:23,0 users,load average: 0.00, 0.07, 0.09
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s):0.0 us,0.1 sy,0.0 ni, 99.9 id,0.0 wa,0.0 hi,0.0 si,0.0 st
KiB Mem :1867048 total, 473360 free, 226088 used,1167600 buff/cache
KiB Swap:2097148 total,2095864 free, 1284 used.1329528 avail Mem
PID USER PRNI VIRT RES SHR S%CPU %MEM TIME+ COMMAND
1 root 20 0 40188 1676 1296 R 0.00.1 0:00.05 top
top - 16:09:04 up 2 days,1:23,0 users,load average: 0.00, 0.07, 0.09
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s):0.0 us,0.1 sy,0.0 ni, 99.9 id,0.0 wa,0.0 hi,0.0 si,0.0 st
KiB Mem :1867048 total, 473268 free, 226176 used,1167604 buff/cache
KiB Swap:2097148 total,2095864 free, 1284 used.1329440 avail Mem
PID USER PRNI VIRT RES SHR S%CPU %MEM TIME+ COMMAND
1 root 20 0 40188 1676 1296 R 0.00.1 0:00.05 top^C
#
#
# docker stop a17fac4b304526346ff0b07b209e1859259914c0b73bd538be11f946b456b101
a17fac4b304526346ff0b07b209e1859259914c0b73bd538be11f946b456b101 docker commit
docker commit命令-提交一个新的image
# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2cff51b765c2 sshdocker "/usr/sbin/sshd -D" 6 minutes ago Up 6 minutes 0.0.0.0:32769->22/tcp mysshdocker
# docker commit 2cff centos7/ssh:version1
sha256:7369170d76efb411ea023bc795aa2b2e403077c9d324f9334429cad35df7a005
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
centos7/ssh version1 7369170d76ef 9 seconds ago 422MB
sshdocker latest 3f5fd510439f 4 hours ago 323MB
<none> <none> bd0c225f3c21 4 hours ago 281MB
centos7 tag1 b7350ef2bb8d 5 hours ago 621MB
centos centos7.1.1503 c288e5945774 5 weeks ago 212MB
#
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