Fedora 23
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Docker : Add Container Images
2015/11/12
 
Add Container Images.
[1] For exmaple, update official image with installing httpd and add it as a new image for containers. The container is generated every time for executing "docker run" command, so add the latest executed container like follows.
# show list of images

[root@dlp ~]#
docker images

REPOSITORY          TAG      IMAGE ID       CREATED      VIRTUAL SIZE
docker.io/fedora    latest   c7d2f0130dae   9 days ago   204.3 MB

# start a Container and install httpd

[root@dlp ~]#
docker run fedora /bin/bash -c "dnf -y update; dnf -y install httpd"

[root@dlp ~]#
docker ps -a | head -2

CONTAINER ID   IMAGE   COMMAND                 CREATED              STATUS                   PORTS  NAMES
726fb955d8f6   fedora  "/bin/bash -c 'dnf -y"  About a minute ago   Exited (0) 9 seconds ago        naughty_banach

# add the image with httpd

[root@dlp ~]#
docker commit 726fb955d8f6 images/fedora_httpd

539e352eb03146fa91b130c2aaae4b99b2f79569a37bcbce72c4c83b996e0a61

# show list

[root@dlp ~]#
docker images

REPOSITORY            TAG      IMAGE ID        CREATED          VIRTUAL SIZE
images/fedora_httpd   latest   539e352eb031    23 seconds ago   549.2 MB
docker.io/fedora      latest   c7d2f0130dae    9 days ago       204.3 MB

# generate a Container from the new image and make sure httpd exists

[root@dlp ~]#
docker run images/fedora_httpd /usr/sbin/httpd -V

AH00558: httpd: Could not reliably determine the server's fully qualified domain name, 
using 172.17.0.5. Set the 'ServerName' directive globally to suppress this message
Server version: Apache/2.4.17 (Fedora)
Server built:   Oct 28 2015 11:18:40
Server's Module Magic Number: 20120211:51
Server loaded:  APR 1.5.2, APR-UTIL 1.5.4
Compiled using: APR 1.5.2, APR-UTIL 1.5.4
Architecture:   64-bit
Server MPM:     prefork
  threaded:     no
    forked:     yes (variable process count)
Server compiled with....
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