custom-image-creation.md

Create CentOS Custom Image

I wrote a shell script to create custom images but it was a hassle because I had to modify the script almos each time I created an image. That's why I switched to osbuild.

Install OSBuild

# dnf install -y lorax lorax-composer lorax-templates-generic \
  composer-cli osbuild cockpit-composer weldr-client

Enable services

# systemctl enable osbuild-composer.socket
# systemctl start osbuild-composer.socket

Add repos

EPEL

cat <<EOF > epel.ini
check_gpg = true
check_repogpg = true
check_ssl = true
id = "EPEL9"
name = "EPEL9"
rhsm = false
system = false
type = "yum-baseurl"
url = "https://mirrors.kernel.org/fedora-epel/9/Everything/x86_64/"
EOF

Add the repo to composer

# composer-cli sources add epel.ini

ELRepo

cat <<EOF > elrepo.ini
check_gpg = true
check_repogpg = true
check_ssl = true
id = "ELRepo"
name = "ELRepo"
rhsm = false
system = false
type = "yum-baseurl"
url = "http://elrepo.org/linux/elrepo/el9/$basearch/"
EOF

Add the repo to composer

# composer-cli sources add elrepo.ini

Sotolito

cat <<EOF > sotolito.ini
check_gpg = true
check_repogpg = true
check_ssl = true
id = "SotolitoLabs"
name = "SotolitoLabs"
rhsm = false
system = false
type = "yum-baseurl"
url = "http://repos.sotolitolabs.com/linux/sotolito/el9/$basearch/"
EOF

Add the repo to composer

# composer-cli sources add sotolito.ini

References

• https://major.io/p/build-custom-centos-stream-cloud-image/