Fedora 31
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Buildah : Create an Image from Scratch2019/11/19
 
Create a container image from empty Container Image.
This tutorial is based on the environment [SELinux = disabled].
[1] Start to create with [scratch] image.
# create an empty container with [scratch]

[root@dlp ~]#
newcontainer=$(buildah from scratch)

[root@dlp ~]#
buildah containers 

CONTAINER ID  BUILDER  IMAGE ID     IMAGE NAME                       CONTAINER NAME
2d2ca2cfecd7     *     f0858ad3febd docker.io/library/fedora:latest  2d2ca2cfecd73a117a17c3b9c6327b3daa885a8c709378d031ece50e5db9f06e
34f4b72375f6     *     f0858ad3febd docker.io/library/fedora:latest  fedora-working-container
dcd186abe47b     *     f0858ad3febd docker.io/library/fedora:latest  fedora-working-container-1
ad0816dab8d1     *                  scratch                          working-container
# mount [scratch] container

[root@dlp ~]#
scratchmnt=$(buildah mount $newcontainer)

[root@dlp ~]#
echo $scratchmnt 

/var/lib/containers/storage/overlay/b73a004287787fde226b3c1c73ac4fc08825a44ad851d98119d45a19aec774ed/merged
# install packages to [scratch] container

[root@dlp ~]#
dnf -y group install "Minimal Install" --releasever=31 --installroot=$scratchmnt
# unmount

[root@dlp ~]#
buildah umount $newcontainer 

4243cdc53f1570fb4628fa9eca823cfb6926f5b98d884b008820f003ab8f153c
# run container

[root@dlp ~]#
buildah run $newcontainer bash

[root@4243cdc53f15 /]#
[root@4243cdc53f15 /]#
ls 

bin   dev  home  lib64  mnt  proc  run   srv  tmp  var
boot  etc  lib   media  opt  root  sbin  sys  usr
[root@4243cdc53f15 /]#
exit
# add image

[root@dlp ~]#
buildah commit $newcontainer fedora-minimum:latest 

Getting image source signatures
Copying blob 4e7842f0afef done
Copying config 3659931d67 done
Writing manifest to image destination
Storing signatures
3659931d679ecc9b3e612057d736b37b10665b0531114b7557b9177e0bcae979
[root@dlp ~]#
buildah images 

REPOSITORY                        TAG      IMAGE ID       CREATED          SIZE
localhost/fedora-minimum          latest   3659931d679e   47 seconds ago   1.03 GB
localhost/my-fedora               latest   c0eb1c228705   21 minutes ago   592 MB
docker.io/library/fedora          latest   f0858ad3febd   2 weeks ago      201 MB
Matched Content