[bitnami/metallb] Adding the MetalLB Helm Chart. (#2068)

* added objectstorageConfig to the sidecar container

* Bumped version and added documentation of the added values.

* Fixed indentation of environment variables

* Rename ConfigMap to Secret and added to production-values

* Fixed missing space

* added the metallb chart

* Update bitnami/metallb/Chart.yaml

Co-Authored-By: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

* Update bitnami/metallb/README.md

Co-Authored-By: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

* Update bitnami/metallb/templates/tests/test-connection.yaml

Co-Authored-By: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

* Update bitnami/metallb/values.yaml

Co-Authored-By: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

* Update bitnami/metallb/values.yaml

Co-Authored-By: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

* Update README.md

* Update bitnami/metallb/README.md

Co-Authored-By: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

* fixed `---`

* Added templating

* Fixed some bugs and added securityContext also bumped metallb appVersion

* Bumped versions

* Added metallb templates

* Added metallb 0.9.2 changes to the chart

* Added metallb 0.9.2 changes to the chart

* Added missing EOL

* Fixed the appVersion

* added secret autogeneration for the members to join

* Bumped version accordingly to cellebyte/helm

* Fixed missing EOL

* Bumped templates to the new versiona and bumped metallb version

* Fixed some template behaviour

* Bumped chart version

* Bumped image tags to use the latest version

* Run the container as Root because the speaker needs the capability to use root specific network features

* fixed typo and email

* use bitnami images

* added app.kubernetes.io/component app.kubernetes.io/app

* Use nindent

* Fixed nindent and some old labels

* added more configurable options

* Fixed nindent stuff

* Fixed trim-suffix

* added templates to handle secrets and configmaps the proper way

* fixed wrong documentation

* Fixed template executing if configInline defined

* fixed the psps

* Make psp also autogenerated

* remove one eol

* Added eol

* Added the missing doc pieces

* added ref for securityContext

* Fixed securityContext

* added some NOTES after the deployment

Co-authored-by: Carlos Rodríguez Hernández <carrodher1179@gmail.com>

bitnami/metallb/templates/prometheus/metallb.alerts.yaml

@@ -0,0 +1,27 @@
+{{- if and .Values.prometheus.prometheusRule.enabled .Values.prometheus.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: {{ include "metallb.fullname" . }}
+  labels: {{ include "metallb.labels" . | nindent 4 }}
+spec:
+  groups:
+  - name: {{ include "metallb.fullname" . }}.alerts
+    rules:
+    - alert: MetalLBStaleConfig
+      annotations:
+        message: {{`'{{ $labels.job }} - MetalLB {{ $labels.container_name }} on {{ $labels.instance
+          }} has a stale config for > 1 minute'`}}
+      expr: metallb_k8s_client_config_stale_bool{job="{{ .Values.prometheus.serviceMonitor.jobLabel }}"} == 1
+      for: 1m
+      labels:
+        severity: warning
+    - alert: MetalLBConfigNotLoaded
+      annotations:
+        message: {{`'{{ $labels.job }} - MetalLB {{ $labels.container_name }} on {{ $labels.instance
+          }} has not loaded for > 1 minute'`}}
+      expr: metallb_k8s_client_config_loaded_bool{job="{{ .Values.prometheus.serviceMonitor.jobLabel }}"} == 0
+      for: 1m
+      labels:
+        severity: warning
+{{- end }}