Buildah : Create images from Scratch2023/06/21 |
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Create container images from an empty container image.
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| [1] | Start to create with [scratch] image. |
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# create an empty container with [scratch] root@dlp:~# newcontainer=$(buildah from scratch) root@dlp:~# buildah containers CONTAINER ID BUILDER IMAGE ID IMAGE NAME CONTAINER NAME 4dfd63c8deb2 * 49081a1edb0b docker.io/library/debian:latest debian-working-container 7279b5cfbac1 * 49081a1edb0b docker.io/library/debian:latest debian-working-container-1 ca81bc5ed420 * scratch working-container # mount [scratch] container root@dlp:~# scratchmnt=$(buildah mount $newcontainer) root@dlp:~# echo $scratchmnt /var/lib/containers/storage/overlay/a45ad1071206883b9559aae6dd59cf6ad44fa1a9ba6b74fad6cec01670182223/merged # install packages to [scratch] container root@dlp:~# apt -y install debootstrap root@dlp:~# debootstrap bookworm $scratchmnt # unmount root@dlp:~# buildah umount $newcontainer ca81bc5ed4203414c464614b50168b696c48485b734a35d4a04a4776b4165e40 # run container root@dlp:~# buildah run $newcontainer cat /etc/os-release PRETTY_NAME="Debian GNU/Linux 12 (bookworm)" NAME="Debian GNU/Linux" VERSION_ID="12" VERSION="12 (bookworm)" VERSION_CODENAME=bookworm ID=debian HOME_URL="https://www.debian.org/" SUPPORT_URL="https://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" # add images root@dlp:~# buildah commit $newcontainer debian-basic:latest Getting image source signatures Copying blob 226ddb469ebd done Copying config d48f2ebebf done Writing manifest to image destination Storing signatures d48f2ebebf104e2b4fd1d424057e73b80cdb41017136277503d743f6c9c1e175root@dlp:~# buildah images REPOSITORY TAG IMAGE ID CREATED SIZE localhost/debian-basic latest d48f2ebebf10 19 seconds ago 297 MB localhost/my-debian latest aeae4020349c 16 minutes ago 191 MB docker.io/library/debian latest 49081a1edb0b 8 days ago 121 MB # test to run a container root@dlp:~# podman run localhost/debian-basic /bin/echo "Hello my debian" Hello my debian |