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#!/bin/bash
set -x
###############################################################################
# Script to create a RHCOS custom image containing a NetworkManager rpm from
# a copr repository.
#
# In order to have a custom RHCOS image, we cannot modify the image itself but
# we can add a custom layered image that includes all RHCOS functionality and
# adds additional functionality to it.
#
# Requirements:
# - A quay.io registry where you have push access.
# - You must have your pull-secret in the same directory where the script is
# being run. You can download your pull-secret from:
# https://console.redhat.com/openshift/install/pull-secret
#
# In order to install this on nodes from a cluster that already exists it must
# be done using MachineConfig operator. In essence the following YAML file
# must be created.
#
# ```
# apiVersion: machineconfiguration.openshift.io/v1
# kind: MachineConfig
# metadata:
# labels:
# machineconfiguration.openshift.io/role: <role>
# name: os-layer-custom-nm
# spec:
# osImageURL: <registry>
# ```
#
# Please, notice that the role and registry need to be set to your needs.
#
# Then, it can be applied by:
#
# $ oc create -f <yaml file>
#
# Finally, the machines will be ready once the field UPDATED has the True value
# in the output of this command.
#
# $ oc get mcp
#
###############################################################################
# Prints usage help
script_usage() {
cat << EOF
Usage:
-h|--help Display this help
--nm-copr Specify the NM stable release to take from Copr
to the RHCOS image. Default value is main
branch.
--base Specify the base image of RHCOS to be used.
--registry Specify registry to be used to push the image.
--tag Specify the tag to be used when pushing the image to the registry.
Default value is: latest
EOF
}
# Parse the parameters
parse_params() {
local param
while [[ $# -gt 0 ]]; do
case $1 in
-h | --help)
script_usage
exit 0
;;
--nm-copr)
nm_copr="$2"
shift
shift
;;
--base)
base="$2"
shift
shift
;;
--registry)
registry="$2"
shift
shift
;;
--tag)
tag="$2"
shift
shift
;;
*)
echo "Invalid parameter provided \"$1\""
exit 1
esac
done
}
# Generates the Containerfile needed for building the custom image
generate_containerfile() {
cat << EOF > Containerfile
FROM $base
RUN curl -s https://copr.fedorainfracloud.org/coprs/networkmanager/NetworkManager-$nm_copr/repo/epel-9/networkmanager-NetworkManager-$nm_copr-epel-9.repo | tee /etc/yum.repos.d/networkmanager-$nm_copr.repo
RUN rpm-ostree override replace --experimental --freeze --from repo='copr:copr.fedorainfracloud.org:networkmanager:NetworkManager-$nm_copr' \\
NetworkManager \\
NetworkManager-cloud-setup \\
NetworkManager-ovs \\
NetworkManager-team \\
NetworkManager-tui \\
NetworkManager-libnm && \\
rpm-ostree cleanup -m && \\
ostree container commit
EOF
}
# Builds the custom image and push it to the registry
build_and_push() {
podman build -t $registry:$tag . --authfile pull-secret
podman login quay.io
podman push $registry:$tag
}
main() {
# Define the defaults
tag="latest"
parse_params "$@"
generate_containerfile
build_and_push
}
main "$@"
# vim: syntax=sh cc=80 tw=79 ts=4 sw=4 sts=4 et sr
|
