bootkube.sh: Render kernel boot arguments for SNO

In an effort to speed up installation and avoid node reboots this
command will run `tuneD` on a properly isolated environment and render a
MachineConfig to apply the kernel boot args readed from
`/etc/tuned/bootcmdline`

Signed-off-by: Jose Luis Ojosnegros Manchón <[email protected]>

Author: jlojosnegros

data/data/bootstrap/files/usr/local/bin/bootkube.sh.template

@@ -340,6 +340,45 @@ then
     record_service_stage_success
 fi
 
+if [ "$BOOTSTRAP_INPLACE" = true ] && [ ! -f cmdbootline-nto-bootstrap.done ]; then
+	record_service_stage_start "cmdbootline-nto-bootstrap"
+
+	rm --recursive --force cmdbootline-nto-bootstrap
+
+	# Create folders for overlay and podman command to use them
+	tmpfolder=$(mktemp -d)
+	echo ${tmpfolder}
+	podmancmd="bootkube_podman_run --attach=stderr --rm "
+	for folder in var/lib/tuned/profile-data etc/modprobe.d etc/sysconfig etc/kubernetes etc/sysctl.d etc/systemd run sys lib/modules var/lib/kubelet usr/lib/tuned etc/tuned; do
+		lowerfolder="/${folder}"
+		if [ ! -d "$lowerfolder" ]; then
+			echo "Skipping mounting $lowerfolder"
+			continue
+		fi
+		upperfolder="${tmpfolder}/${folder}/upper"
+		workfolder="${tmpfolder}/${folder}/work"
+		mkdir -p ${upperfolder}
+		mkdir -p ${workfolder}
+		podmancmd="${podmancmd} -v ${lowerfolder}:/${folder}:O,upperdir=${upperfolder},workdir=${workfolder}"
+	done
+
+	podmancmd="${podmancmd} --volume $PWD:/assets:z --env=CLUSTER_NODE_TUNED_BOOTSTRAP_SAFE_ENV=true --name tuned ${NODE_TUNING_OPERATOR_IMAGE}"
+	podmancmd="${podmancmd} render-bootcmd-mc --asset-input-dir=/assets/manifests --asset-output-dir=/assets/cmdbootline-nto-bootstrap --mcp-name=master"
+
+	# execute podmancmd
+	$podmancmd
+
+	#read machineconfig from --asset-ouput-dir
+	# Copy over manifests if they were generated by NTO
+	if [ -n "$(ls -A cmdbootline-nto-bootstrap)" ]; then
+		cp cmdbootline-nto-bootstrap/* manifests/
+	fi
+
+	rm -rf ${tmpfolder}
+	touch cmdbootline-nto-bootstrap.done
+	record_service_stage_success
+fi
+
 if [ ! -f mco-bootstrap.done ]
 then
     record_service_stage_start "mco-bootstrap"