Docker : Add Container images2021/05/13

	Add Container images you created.
[1]	For exmaple, update official image with installing Nginx and add it as a new image for container. The container is generated every time for executing docker run command, so add the latest executed container like follows.

# show images

root@dlp:~#

docker images

REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
ubuntu       latest    7e0aa2d69a15   2 weeks ago   72.7MB

# start a Container and install nginx

root@dlp:~#

docker run ubuntu /bin/bash -c "apt-get update; apt-get -y install nginx"

root@dlp:~#

docker ps -a | head -2

CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS                        PORTS     NAMES
555bbffdd1aa   ubuntu    "/bin/bash -c 'apt-g…"   36 seconds ago   Exited (0) 14 seconds ago               wonderful_nightingale

# add the image

root@dlp:~#

docker commit 555bbffdd1aa srv.world/ubuntu-nginx

sha256:8f1fbe417eb2f1260495629f350c75324368d9bce9c61262158813987f085273

root@dlp:~#

docker images

REPOSITORY               TAG       IMAGE ID       CREATED          SIZE
srv.world/ubuntu-nginx   latest    8f1fbe417eb2   16 seconds ago   160MB
ubuntu                   latest    7e0aa2d69a15   2 weeks ago      72.7MB

# generate a container from the new image and execute [which] to make sure nginx exists

root@dlp:~#

docker run srv.world/ubuntu-nginx /usr/bin/which nginx

/usr/sbin/nginx

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