docker run -d和docker run -it的区别详解
作者：RedCong
记得第一次接触docker的时候,教程中写着docker run -it之类的命令,当时对这个-it选项是一知半解,下面这篇文章主要给大家介绍了关于docker run -d和docker run -it的区别的相关资料,需要的朋友可以参考下
docker run -it
- i : interactive 代表交互
- -t : tty 分配伪 TTY
测试不带前台进程的，例如centos/ubuntu
> docker run -it ubuntu root@a30a87e0e065:/# exit exit > docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
我们发现容器已经退出了
> docker run -it ubuntu root@a30a87e0e065:/# 输入Ctrl + P + Q > docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES e51e423ac575 ubuntu "bash" 10 seconds ago Up 10 seconds romantic_franklin
发现容器不会退出
测试带前台进程的，例如redis
> docker run -it redis
1:C 26 Nov 2022 15:15:37.357 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:C 26 Nov 2022 15:15:37.357 # Redis version=6.2.6, bits=64, commit=00000000, modified=0, pid=1, just started
a config file use redis-server /path/to/redis.conf
1:M 26 Nov 2022 15:15:37.358 * monotonic clock: POSIX clock_gettime
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 6.2.6 (00000000/0) 64 bit
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 1
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | https://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
1:M 26 Nov 2022 15:15:37.358 # Server initialized
1:M 26 Nov 2022 15:15:37.358 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
1:M 26 Nov 2022 15:15:37.358 * Ready to accept connections
# 输入Ctrl + P + Q
> docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
14cef5be594b redis "docker-entrypoint.s…" 15 seconds ago Up 14 seconds 6379/tcp silly_wright
> docker run -it redis
1:C 26 Nov 2022 15:22:49.890 # Redis version=6.2.6, bits=64, commit=00000000, modified=0, pid=1, just started
1:C 26 Nov 2022 15:22:49.890 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
1:M 26 Nov 2022 15:22:49.891 * monotonic clock: POSIX clock_gettime
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 6.2.6 (00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 1
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | https://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
1:M 26 Nov 2022 15:22:49.891 # Server initialized
1:M 26 Nov 2022 15:22:49.891 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
1:M 26 Nov 2022 15:22:49.891 * Ready to accept connections
exit #这里没有反应，我们继续Ctrl + C
^C1:signal-handler (1669476186) Received SIGINT scheduling shutdown...
1:M 26 Nov 2022 15:23:06.123 # User requested shutdown...
1:M 26 Nov 2022 15:23:06.123 * Saving the final RDB snapshot before exiting.
1:M 26 Nov 2022 15:23:06.130 * DB saved on disk
1:M 26 Nov 2022 15:23:06.130 # Redis is now ready to exit, bye bye...
> docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8668b2bf13b1 redis "docker-entrypoint.s…" 24 seconds ago Exited (0) 7 seconds ago ecstatic_lehmann总结：
-it 使用交互方式运行，进入容器查看内容
1.当运行的镜像没有前台进程。
exit #run进去容器，exit退出，容器停止
Ctrl+P+Q # run进去容器，ctrl+p+q退出，容器不停止
1.当运行的镜像有前台进程。
exit #用exit无效，使用Ctrl + C ,容器会停止
Ctrl+P+Q # run进去容器，ctrl+p+q退出，容器不停止
docker run -d
-d : detach 表示后台运行
测试不带前台进程的，例如centos/ubuntu
> docker run -d ubuntu > docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0210648ee10f ubuntu "bash" 34 seconds ago Exited (0) 32 seconds ago jolly_wright
我们发现容器启动后会立马退出
测试带前台进程的，例如redis
> docker run -d redis > docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3adf2698b224 redis "docker-entrypoint.s…" 5 seconds ago Up 4 seconds 6379/tcp vigilant_agnesi
我们发现容器不会退出
总结：
Docker容器后台运行,就必须有一个前台进程.
容器运行的命令如果不是那些一直挂起的命令（比如运行top，tail），就是会自动退出的。
docker run -d ubuntu tail -f /dev/null # 这种情况就不会退出了
总结
到此这篇关于docker run -d和docker run -it的区别详解的文章就介绍到这了,更多相关docker run -d和docker run -it区别内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！