什么是容器？
容器是docker镜像运行的一个实例,所不同的是,他带有额外的可写文件
docker的容器十分轻量级,用户可以随意删除或者创建
docker创建容器的方式：
默认情况下docker create创建的容器是停止状态,一般我们可以使用docker start命令来启动容器,使用docker stop命令来停止容器。
docker容器创建：
一、新建容器：
[root@docker ~]# docker create -it ubuntu:latest
713e34e2b4638d824cf663ee0ec7dfc1a3664d6d0ba2fafd72202d3bfdde6a50
[root@docker ~]#
[root@docker ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
713e34e2b463 ubuntu:14.04 "/bin/bash" 18 seconds ago cocky_bell
[root@docker ~]#
二、启动容器有两种方式
1.基于镜像新建一个容器并且启动
2.把在终止的状态容器重新启动
docker run 相当于 docker create + docker start
三、如下：
[root@docker ~]# docker run ubuntu /bin/echo "hello world"
hello world
You have new mail in /var/spool/mail/root
[root@docker ~]#
四、登陆到交互式模式下面,
-t 让docker分配一个伪终端,并绑定到容器的标准输出上
-i 让容器的标准输出打开
可以是用crtl+d 或者exit退出，需要注意的是,退出意味着终止。
如下：
[root@docker ~]# docker run -ti ubuntu:14.04 /bin/bash
root@10f115a0aa25:/# ls
bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
root@10f115a0aa25:/# pwd
/
root@10f115a0aa25:/# ps
PID TTY TIME CMD
1 ? 00:00:00 bash
20 ? 00:00:00 ps
root@10f115a0aa25:/#
docker容器守护状态运行:
有时候为了业务方便可以使用”-d“参数来后台启动
如下：
1.首先在后台运行。
[root@docker ~]# docker run -d ubuntu /bin/bash -c "while true; do echo Hello world; sleep 1; done"
6aa9905ab9bc2693b991001065c4a81c2a5fdee7a04a548146cf8b73ba753e9e
[root@docker ~]#
2.查看状态
[root@docker ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6aa9905ab9bc ubuntu:14.04 "/bin/bash -c 'while 18 seconds ago Up 18 seconds jovial_elion
[root@docker ~]#
3.查看日志
[root@docker ~]# docker logs 6aa 连接的ID
Hello world
Hello world
Hello world
Hello world
Hello world
Hello world
...
[root@docker ~]#
4.终止
[root@docker ~]# docker stop 6aa
6aa
[root@docker ~]#
5.查看处于终止状态的容器ID
[root@docker ~]# docker ps -a -q
6aa9905ab9bc
10f115a0aa25
e192cf610bda
c535b42dc3f2
713e34e2b463
c72ad6c5adcd
[root@docker ~]#
6.启动以及重新启动
[root@docker ~]# docker start 6aa
6aa
[root@docker ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6aa9905ab9bc ubuntu:14.04 "/bin/bash -c 'while 4 minutes ago Up 4 seconds jovial_elion
[root@docker ~]# docker restart 6aa 会将运行的容器终止,然后再重新启动它。
6aa
[root@docker ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6aa9905ab9bc ubuntu:14.04 "/bin/bash -c 'while 4 minutes ago Up 1 seconds jovial_elion
[root@docker ~]#
docker容器怎么删除容器：
1.先查看容器
[root@docker tmp]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a457769fdd92 ubuntu:14.04 "/bin/bash" 24 minutes ago Up 24 minutes backstabbing_fermi
7d3d35cb9c40 ubuntu:14.04 "/bin/bash" 40 minutes ago Up 40 minutes elegant_brattain
6aa9905ab9bc ubuntu:14.04 "/bin/bash -c 'while 50 minutes ago Exited (-1) 39 minutes ago jovial_elion
10f115a0aa25 ubuntu:14.04 "/bin/bash" About an hour ago Exited (0) 59 minutes ago compassionate_elion
e192cf610bda ubuntu:14.04 "/bin/echo test" About an hour ago Exited (0) About an hour ago goofy_pasteur
c535b42dc3f2 ubuntu:14.04 "/bin/echo 'hello wo About an hour ago Exited (0) About an hour ago compassionate_wozniak
713e34e2b463 ubuntu:14.04 "/bin/bash" About an hour ago cocky_bell
c72ad6c5adcd ubuntu:14.04 "/bin/bash" 3 hours ago Exited (0) 3 hours ago suspicious_feynman
8703418b2dec training/webapp:latest "echo 'hello world'" 3 hours ago Exited (0) 3 hours ago pensive_curie
7f3491707dd4 ubuntu:14.04 "/bin/bash" 3 hours ago Exited (0) 3 hours ago ecstatic_poincare
b89ee17998ec ubuntu:14.04 "/bin/bash" 3 hours ago Exited (0) 3 hours ago tender_babbage
0aced9db36e2 training/webapp:latest "python app.py" 3 months ago Exited (0) 9 weeks ago 0.0.0.0:49153->5000/tcp web
436efb7b9933 28a945b4333c "/bin/bash" 3 months ago Exited (0) 9 weeks ago berserk_thompson
[root@docker tmp]#
2.删除容器
[root@docker tmp]# docker rm -f 436efb7b9933 0aced9db36e2 b89ee17998ec
436efb7b9933
0aced9db36e2
b89ee17998ec
[root@docker tmp]#
3.查看
[root@docker tmp]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a457769fdd92 ubuntu:14.04 "/bin/bash" 25 minutes ago Up 25 minutes backstabbing_fermi
7d3d35cb9c40 ubuntu:14.04 "/bin/bash" 41 minutes ago Up 41 minutes elegant_brattain
6aa9905ab9bc ubuntu:14.04 "/bin/bash -c 'while 52 minutes ago Exited (-1) 41 minutes ago jovial_elion
10f115a0aa25 ubuntu:14.04 "/bin/bash" About an hour ago Exited (0) About an hour ago compassionate_elion
e192cf610bda ubuntu:14.04 "/bin/echo test" About an hour ago Exited (0) About an hour ago goofy_pasteur
c535b42dc3f2 ubuntu:14.04 "/bin/echo 'hello wo About an hour ago Exited (0) About an hour ago compassionate_wozniak
713e34e2b463 ubuntu:14.04 "/bin/bash" About an hour ago cocky_bell
c72ad6c5adcd ubuntu:14.04 "/bin/bash" 3 hours ago Exited (0) 3 hours ago suspicious_feynman
8703418b2dec training/webapp:latest "echo 'hello world'" 3 hours ago Exited (0) 3 hours ago pensive_curie
7f3491707dd4 ubuntu:14.04 "/bin/bash" 3 hours ago Exited (0) 3 hours ago ecstatic_poincare
[root@docker tmp]#
See also