CentOS Stream 8
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Buildah : Create images from Scratch2021/03/22
 
Create container images from an empty container image.
[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
5b03b5f7f695     *     2f3766df23b6 registry.centos.org/centos:la... centos-working-container
48fe445847df     *     2f3766df23b6 registry.centos.org/centos:la... centos-working-container-1
7dfacaa35c75     *                  scratch                          working-container
# mount [scratch] container

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

[root@dlp ~]#
echo $scratchmnt 

/var/lib/containers/storage/overlay/95a18674e9ef46ddce96cfc881518019f7e28d4bcc3f5c9d7fa5878a898895ba/merged
# install packages to [scratch] container

[root@dlp ~]#
dnf -y group install "Minimal Install" --releasever=8-stream --installroot=$scratchmnt
# unmount

[root@dlp ~]#
buildah umount $newcontainer 

7dfacaa35c7523d2b82d6f957aad28a8c917ee4d95ebb1d6a1992843f4377788
# run container

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

[root@7dfacaa35c75 /]#
[root@7dfacaa35c75 /]#
cat /etc/os-release 

NAME="CentOS Stream"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Stream 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"
[root@7dfacaa35c75 /]#
exit
# add images

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

Getting image source signatures
...
...
Writing manifest to image destination
Storing signatures
a47729971b9565ced690c141d654f6347a54b8ce3675bff8773bee971aa98abb
[root@dlp ~]#
buildah images 

REPOSITORY                        TAG      IMAGE ID       CREATED              SIZE
localhost/centos-minimum          latest   a47729971b95   About a minute ago   1.42 GB
node01.srv.world:5000/my-centos   latest   e7ea5d037c9d   36 minutes ago       257 MB
registry.centos.org/centos        stream8  2f3766df23b6   3 months ago         217 MB
Matched Content