root@ubuntu:~# docker network create --driver=bridge --subnet=10.10.10.0/24 --gateway=10.10.10.1 my-net

root@ubuntu:~# docker network create --driver=bridge --subnet=10.10.10.0/24 --gateway=10.10.10.1 my-net
1e6f6c3b9995342d1331dd36250a5f6bbedf56e69029a1f5ad5a2b42787407c1

• --subnet

  되도록이면 host의 network와 겹치지 않게 하는 것이 좋다.

root@ubuntu:~# docker network ls

root@ubuntu:~# docker network ls
NETWORK ID     NAME      DRIVER    SCOPE
e17e10bea72e   bridge    bridge    local
e7d368ac9ba7   host      host      local
1e6f6c3b9995   my-net    bridge    local
2e7e0f9b2738   none      null      local

root@ubuntu:~# docker network inspect my-net

• 출력

root@ubuntu:~# docker run -d --name net-test --net my-net httpd

root@ubuntu:~# docker run -d --name net-test --net my-net httpd
07715fb1addf0c5fa8d2c242d8cccecd86d269d804b525652e2ae4faae7ad61b

root@ubuntu:~# docker inspect net-test | grep IPAddr

root@ubuntu:~# docker inspect net-test | grep IPAddr
				"SecondaryIPAddresses": null,
				"IPAddress": "",
						"IPAddress": "10.10.10.2",

root@ubuntu:~# docker run -d --name net-test2 --net my-net centos:7

root@ubuntu:~# docker run -d --name net-test2 --net my-net centos:7
[root@f1f841f7a840 /]#

[root@f1f841f7a840 /]# ping 10.10.10.2

[root@f1f841f7a840 /]# ping 10.10.10.2
PING 10.10.10.2 (10.10.10.2) 56(84) bytes of data.
64 bytes from 10.10.10.2: icmp_seq=1 ttl=64 time=0.210 ms
64 bytes from 10.10.10.2: icmp_seq=2 ttl=64 time=0.100 ms
^C
--- 10.10.10.2 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1013ms
rtt min/avg/max/mdev = 0.100/0.155/0.210/0.055 ms

container끼리도 통신이 된다.

(Ctrl+p+q)

root@ubuntu:~# docker exec net-test2 ls

root@ubuntu:~# docker exec net-test2 ls
anaconda-post.log
bin
dev
etc
home
lib
lib64
media
mnt
opt
proc
root
run
sbin
srv
sys
tmp
usr
var

container 밖에서 container 내부에 명령을 한다. 즉 위의 출력 결과는 net-test2에서 ls를 입력한 결과다.

root@ubuntu:~# docker exec -it net-test2 /bin/bash [root@f1f841f7a840 /]#

container로 진입한다.

root@ubuntu:~# docker ps -q

root@ubuntu:~# docker ps -q
f1f841f7a840
07715fb1addf
81d04c495f7c

root@ubuntu:~# docker ps -aq

root@ubuntu:~# docker ps -aq
f1f841f7a840
07715fb1addf
81d04c495f7c

root@ubuntu:~# docker rm -f $(docker ps -aq)

root@ubuntu:~# docker rm -f $(docker ps -aq)
df1f841f7a840
07715fb1addf
81d04c495f7c

root@ubuntu:~# docker ps -a

root@ubuntu:~# docker ps -a
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

root@ubuntu:~# docker run -it -w=/working -e WORK=/working centos:7 /bin/bash

root@ubuntu:~# docker run -it -w=/working -e WORK=/working centos:7 /bin/bash
[root@98e74a15f23f working]#

• -w

  working directory 지정

• -e

  environment variable

  여기서는 WORK=/working으로 설정한다.

[root@98e74a15f23f working]# pwd

[root@98e74a15f23f working]# pwd
/working

[root@98e74a15f23f working]# echo $WORK

[root@98e74a15f23f working]# echo $WORK
/working

root@ubuntu:~# docker ps

root@ubuntu:~# docker ps
CONTAINER ID   IMAGE      COMMAND       CREATED         STATUS         PORTS     NAMES
98e74a15f23f   centos:7   "/bin/bash"   3 minutes ago   Up 3 minutes             **infallible_poincare**

root@ubuntu:~# touch cptest.txt root@ubuntu:~# docker cp ./cptest.txt infallible_poincare:/working/cptest.txt root@ubuntu:~# docker exec infallible_poincare ls /working cptest.txt

root@ubuntu:~# docker cp ./cptest.txt infallible_poincare:/working/cptest.txt
root@ubuntu:~# docker exec infallible_poincare ls /working
cptest.txt

내 host에 있는 파일(cptest.txt)을 container 안으로 복사한 후 확인한 것.

어쨌든 명령어 형식은 cp <SRC> <DEST>로 동일하다.

• host와 container의 구분

  은 :를 기준으로 한다. (infallible_poincare:는 ****infallible_poincare라는 container를 의미하므로)

root@ubuntu:~# docker cp infallible_poincare:/working/cptest.txt ../cptest.txt root@ubuntu:~# ls ..

root@ubuntu:~# docker cp infallible_poincare:/working/cptest.txt ../cptest.txt
root@ubuntu:~# ls ..
bin         dev   lib    libx32      mnt   root  snap      sys  var
boot        etc   lib32  lost+found  opt   run   srv       tmp
**cptest.txt**  home  lib64  media       proc  sbin  swap.img  usr

복사가 된 것을 확인할 수 있다.