[2] Tworzenie obrazów ze źródła

Stworzymy obraz kontenera z pustego obrazu kontenera.

[1] Rozpocznij tworzenie z pustym obrazem.

# stwórz pusty kontener ze źródła [scratch]
[root@lsr01vm ~]# newcontainer=$(buildah from scratch)
[root@lsr01vm ~]# buildah containers
CONTAINER ID BUILDER IMAGE ID IMAGE NAME CONTAINER NAME
d75ca7e5dc8b * 831691599b88 docker.io/library/centos:latest centos-working-container
38b7e6085482 * 831691599b88 docker.io/library/centos:latest centos-working-container-1
e900c96c5283 * scratch working-container

# zamontuj pusty kontener [scratch]
[root@lsr01vm ~]# scratchmnt=$(buildah mount $newcontainer)
[root@lsr01vm ~]# echo $scratchmnt
/var/lib/containers/storage/overlay/e52945c84699cb66e67e33d0fcd2bcf48bb042dbb4e3de6487e26cf941bb623d/merged

# zainstaluj paczki do pustego kontenera [scratch]
[root@lsr01vm ~]# dnf -y group install "Minimal Install" --releasever=8 --installroot=$scratchmnt

# odmontuj go
[root@lsr01vm ~]# buildah umount $newcontainer
e900c96c5283874cb5bdb4d7a204c08cb168d1ade2fee5439cd67684dd8e84d7

# uruchom kontener
[root@lsr01vm ~]# buildah run $newcontainer bash
[root@e900c96c5283 /]#
[root@e900c96c5283 /]# ls
bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
[root@e900c96c5283 /]# uname -a
Linux e900c96c5283 4.18.0-193.6.3.el8_2.x86_64 #1 SMP Wed Jun 10 11:09:32 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
[root@e900c96c5283 /]# exit
exit
[root@lsr01vm ~]#

# dodaj obraz
[root@lsr01vm ~]# buildah commit $newcontainer centos-minimum:latest
Getting image source signatures
Copying blob d65fece330bb done
Copying config 3d3d8fb693 done
Writing manifest to image destination
Storing signatures
3d3d8fb693cef350958d6532414fa859f9afb967f782149368cf9e114072b455
[root@lsr01vm ~]# buildah images
REPOSITORY TAG IMAGE ID CREATED SIZE
localhost/centos-minimum latest 3d3d8fb693ce 4 minutes ago 1.36 GB
docker.io/library/centos latest 831691599b88 7 weeks ago 223 MB