prometheus: keep all grafana functions under grafana flag

lib/prometheus.sh

@@ -44,8 +44,6 @@ deploy_prometheus_operator() {
 		mv kube-prometheus/manifests/prometheus-prometheus.yaml.tmp \
 			kube-prometheus/manifests/prometheus-prometheus.yaml
 
-		_setup_dashboard
-		_run_yq
 		_load_prometheus_operator_images_to_local_registry
 		kubectl create -f kube-prometheus/manifests/setup
 		kubectl wait \
@@ -60,9 +58,12 @@ deploy_prometheus_operator() {
 			-exec kubectl create -f {} \;
 
 		is_set "$GRAFANA_ENABLE" && {
-			find kube-prometheus/manifests -name 'grafana-*.yaml' -type f \
-				-exec kubectl create -f {} \;
-			ok "Grafana deployed"
+			# Double check yq is available
+			command -v yq >/dev/null 2>&1 && {
+				_setup_dashboard_configmap
+				_add_dashboard_to_grafana
+			}
+			_deploy_grafana
 		}
 
 		ok "Prometheus deployed"
@@ -114,11 +115,11 @@ _load_prometheus_operator_images_to_local_registry() {
 	done
 }
 
-_setup_dashboard(){
+_setup_dashboard_configmap(){
 	if [ -f "$DASHBOARD_DIR/grafana-dashboards/kepler-exporter-configmap.yaml" ]; then
 		return 0
 	else
-	header "Setup Dashboard"
+	header "Create Dashboard Configmap"
 	mkdir -p "$DASHBOARD_DIR/grafana-dashboards/"
 	cat - > "$DASHBOARD_DIR/grafana-dashboards/kepler-exporter-configmap.yaml" << EOF
 apiVersion: v1
@@ -136,12 +137,21 @@ metadata:
     namespace: monitoring
 EOF
     fi
+    ok "Create Dashboard Configmap"
 }
 
-_run_yq(){
+_add_dashboard_to_grafana() {
+    header "Edit Kepler Grafana Dashboard "
 	f="$DASHBOARD_DIR/grafana-dashboards/kepler-exporter-configmap.yaml" \
 	yq -i e '.items += [load(env(f))]' "$KUBE_PROM_DIR"/manifests/grafana-dashboardDefinitions.yaml;
 	yq -i e '.spec.template.spec.containers.0.volumeMounts += [ {"mountPath": "/grafana-dashboard-definitions/0/kepler-exporter", "name": "grafana-dashboard-kepler-exporter", "readOnly": false} ]' "$KUBE_PROM_DIR"/manifests/grafana-deployment.yaml
 	yq -i e '.spec.template.spec.volumes += [ {"configMap": {"name": "grafana-dashboard-kepler-exporter"}, "name": "grafana-dashboard-kepler-exporter"} ]' "$KUBE_PROM_DIR"/manifests/grafana-deployment.yaml;
 	ok "Dashboard setup complete"
 }
+
+_deploy_grafana() {
+	header "Deploy Grafana"
+	find kube-prometheus/manifests -name 'grafana-*.yaml' -type f \
+				-exec kubectl create -f {} \;
+	ok "Grafana deployed"
+}

main.sh

@@ -172,7 +172,6 @@ ebpf() {
 		cd /tmp/elfutils-source/elfutils-0.189
 		./configure --disable-debuginfod
 		make install
-
 		mkdir -p /tmp/libbpf-source
 		cd /tmp/libbpf-source
 		yumdownloader --source libbpf
@@ -188,6 +187,37 @@ ebpf() {
 	fi
 }
 
+yq_install() {
+	# Will only install yq if GRAFANA_ENABLE option is set to true
+	if is_set "$GRAFANA_ENABLE"; then
+		command -v yq >/dev/null 2>&1 && {
+			ok "yq is already installed"
+			return 0
+		}
+
+		YQ="/usr/bin/yq"
+		YQ_VERSION=${YQ_VERSION:-v4.34.2}
+		ARCH="$(uname -m)"
+		YQ_ARCH="amd64" # set a reasonable default
+		if [[ -n "${ARCH}" ]]; then
+			case "${ARCH}" in
+				x86_64) YQ_ARCH=amd64;;
+				aarch64) YQ_ARCH=arm64;;
+			esac
+		fi
+		YQ_INSTALL="https://github.com/mikefarah/yq/releases/download/${YQ_VERSION}/yq_linux_${YQ_ARCH}"
+
+		info "installing yq version: $YQ_VERSION and arch: $YQ_ARCH"
+		wget "${YQ_INSTALL}" -O "${YQ}" || {
+			fail "failed to install yq"
+			rm -rf "${YQ}" # cleanup in case of fail
+			return 1
+		}
+		chmod +x "${YQ}"
+		ok "yq was installed successfully"
+	fi
+}
+
 containerruntime() {
 	set -x
 	echo start install container runtime as docker
@@ -243,6 +273,7 @@ main() {
 	prerequisites)
 		linuxHeader
 		ebpf
+		yq_install
 		return $?
 		;;
 	containerruntime)