Add libvirt exporter as a sidecar in the libvirt chart

Users can enable the libvirt exporter sidecar by set
values.sidecars.libvirt_exporter as true.

Change-Id: I7451aa278982bced3178ac3e001eaad3b63d005d

libvirt/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm libvirt
 name: libvirt
-version: 0.1.11
+version: 0.1.12
 home: https://libvirt.org
 sources:
   - https://libvirt.org/git/?p=libvirt.git;a=summary

libvirt/templates/daemonset-libvirt.yaml

@@ -229,6 +229,30 @@ spec:
             {{- end }}
             {{- end }}
 {{ if $mounts_libvirt.volumeMounts }}{{ toYaml $mounts_libvirt.volumeMounts | indent 12 }}{{ end }}
+        {{- if .Values.pod.sidecars.libvirt_exporter }}
+        - name: libvirt-exporter
+{{ tuple $envAll "libvirt_exporter" | include "helm-toolkit.snippets.image" | indent 10 }}
+{{ tuple $envAll $envAll.Values.pod.resources.libvirt_exporter | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
+{{ dict "envAll" $envAll "application" "libvirt" "container" "libvirt_exporter" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
+          ports:
+            - name: metrics
+              protocol: TCP
+              containerPort: {{ tuple "libvirt_exporter" "direct" "metrics" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
+          livenessProbe:
+            httpGet:
+              path: /
+              port: metrics
+          readinessProbe:
+            httpGet:
+              path: /
+              port: metrics
+          volumeMounts:
+            - name: run
+              mountPath: /run
+              {{- if or ( gt .Capabilities.KubeVersion.Major "1" ) ( ge .Capabilities.KubeVersion.Minor "10" ) }}
+              mountPropagation: Bidirectional
+              {{- end }}
+        {{- end }}
       volumes:
         {{ dict "enabled" $ssl_enabled "secretName" $envAll.Values.secrets.tls.client "name" "ssl-client" "path" "/etc/pki/libvirt" "certs" (tuple "clientcert.pem" "clientkey.pem" ) | include "helm-toolkit.snippets.tls_volume" | indent 8 }}
         {{ dict "enabled" $ssl_enabled "secretName" $envAll.Values.secrets.tls.server "name" "ssl-server-cert" "path" "/etc/pki/libvirt" "certs" (tuple "servercert.pem" ) | include "helm-toolkit.snippets.tls_volume" | indent 8 }}

libvirt/values.yaml

@@ -27,6 +27,7 @@ labels:
 images:
   tags:
     libvirt: docker.io/openstackhelm/libvirt:latest-ubuntu_focal
+    libvirt_exporter: vexxhost/libvirtd-exporter:latest
     ceph_config_helper: 'docker.io/openstackhelm/ceph-config-helper:ubuntu_bionic-20200217'
     dep_check: quay.io/airshipit/kubernetes-entrypoint:v1.0.0
     image_repo_sync: docker.io/library/docker:17.07.0
@@ -57,6 +58,10 @@ endpoints:
     port:
       registry:
         node: 5000
+  libvirt_exporter:
+    port:
+      metrics:
+        default: 9474
 
 network_policy:
   libvirt:
@@ -129,6 +134,11 @@ pod:
         libvirt:
           privileged: true
           readOnlyRootFilesystem: false
+        libvirt_exporter:
+          privileged: true
+  sidecars:
+    libvirt_exporter: false
+
   affinity:
     anti:
       type:
@@ -174,6 +184,13 @@ pod:
         limits:
           memory: "1024Mi"
           cpu: "2000m"
+    libvirt_exporter:
+      requests:
+        memory: "128Mi"
+        cpu: "100m"
+      limits:
+        memory: "256Mi"
+        cpu: "500m"
 
 dependencies:
   dynamic:

releasenotes/notes/libvirt.yaml

@@ -12,4 +12,5 @@ libvirt:
   - 0.1.9 Exec libvirt instead of forking from bash
   - 0.1.10 Enable taint toleration for Openstack services jobs
   - 0.1.11 Remove unused overrides and update default image
+  - 0.1.12 Add libvirt exporter as a sidecar
 ...