fix(prometheus): add init containers to download plugins

The following patch extends the helm chart of additional init containers for
each plugin.

templates/_deployment.tpl

@@ -36,6 +36,13 @@
 
 {{/* image */}}
 
+{{- define "reposilite.deployment.images.plugin.fqin" -}}
+{{- $registry := .Values.deployment.pluginContainer.image.registry -}}
+{{- $repository := .Values.deployment.pluginContainer.image.repository -}}
+{{- $tag := default .Chart.AppVersion .Values.deployment.pluginContainer.image.tag -}}
+{{- printf "%s/%s:%s" $registry $repository $tag -}}
+{{- end -}}
+
 {{- define "reposilite.deployment.images.reposilite.fqin" -}}
 {{- $registry := .Values.deployment.reposilite.image.registry -}}
 {{- $repository := .Values.deployment.reposilite.image.repository -}}
@@ -52,6 +59,34 @@
 {{- end }}
 {{- end }}
 
+{{/* initContainers */}}
+
+{{- define "reposilite.deployment.initContainers" -}}
+{{- $initContainers := .Values.deployment.initContainers | default list -}}
+{{- $pluginContainerImage := (include "reposilite.deployment.images.plugin.fqin" . ) }}
+{{- $pluginContainerArgs := .Values.deployment.pluginContainer.args | default list }}
+{{- $pluginContainerArgs := concat $pluginContainerArgs (list "--output-dir" "/app/data/plugins" ) }}
+{{- $pluginContainerVolumeMounts := list (dict "name" "plugins" "mountPath" "/app/data/plugins") }}
+
+{{- if eq (include "reposilite.plugins.prometheus.enabled" $) "true" }}
+{{- $fileName := splitList "/" (tpl .Values.config.plugins.prometheus.url $) | last }}
+{{- $individualArgs := concat $pluginContainerArgs (list "--output" $fileName (tpl .Values.config.plugins.prometheus.url $)) }}
+{{- $initContainers = concat $initContainers (list (dict "args" $individualArgs "name" "download-prometheus-plugin" "image" $pluginContainerImage "volumeMounts" $pluginContainerVolumeMounts)) }}
+{{- end }}
+
+{{ toYaml (dict "initContainers" $initContainers) }}
+
+{{- end }}
+
+{{/* plugins */}}
+{{- define "reposilite.plugins.prometheus.enabled" -}}
+{{- if or .Values.config.plugins.prometheus.enabled .Values.prometheus.metrics.enabled -}}
+true
+{{- else -}}
+false
+{{- end -}}
+{{- end }}
+
 {{/* serviceAccount */}}
 
 {{- define "reposilite.deployment.serviceAccount" -}}
@@ -69,6 +104,11 @@
 {{- if .Values.persistentVolumeClaim.enabled }}
 {{- $volumeMounts = concat $volumeMounts (list (dict "name" "data" "mountPath" .Values.persistentVolumeClaim.path )) }}
 {{- end }}
+
+{{- if eq (include "reposilite.plugins.prometheus.enabled" $) "true" }}
+{{- $volumeMounts = concat $volumeMounts (list (dict "name" "plugins" "mountPath" "/app/data/plugins")) }}
+{{- end }}
+
 {{ toYaml (dict "volumeMounts" $volumeMounts) }}
 {{- end -}}
 
@@ -85,6 +125,10 @@
 {{- $volumes = concat $volumes (list (dict "name" "data" "persistentVolumeClaim" (dict "claimName" $persistentVolumeClaimName))) }}
 {{- end }}
 
+{{- if eq (include "reposilite.plugins.prometheus.enabled" $) "true" }}
+{{- $volumes = concat $volumes (list (dict "name" "plugins" "emptyDir" dict)) }}
+{{- end }}
+
 {{ toYaml (dict "volumes" $volumes) }}
 
 {{- end -}}

templates/_serviceMonitors.tpl

@@ -31,5 +31,5 @@ false
 {{- define "reposilite.serviceMonitor.selectorLabels" -}}
 {{ include "reposilite.selectorLabels" . }}
 {{/* Add label to select the correct service via `selector.matchLabels` of the serviceMonitor resource. */}}
-app.kubernetes.io/service-name: http
+app.kubernetes.io/service-name: {{ required "The scheme of the serviceMonitor is not defined!" .Values.service.scheme }}
 {{- end }}

templates/_services.tpl

@@ -7,8 +7,6 @@
 {{- if .Values.service.annotations }}
 {{ toYaml .Values.service.annotations }}
 {{- end }}
-{{/* Add label to select the correct service via `selector.matchLabels` of the serviceMonitor resource. */}}
-app.kubernetes.io/service-name: http
 {{- end }}
 
 {{/* labels */}}
@@ -18,6 +16,8 @@ app.kubernetes.io/service-name: http
 {{- if .Values.service.labels }}
 {{ toYaml .Values.service.labels }}
 {{- end }}
+{{/* Add label to select the correct service via `selector.matchLabels` of the serviceMonitor resource. */}}
+app.kubernetes.io/service-name: {{ required "The scheme of the serviceMonitor is not defined!" .Values.service.scheme }}
 {{- end }}
 
 {{/* names */}}

templates/deployment.yaml

@@ -109,6 +109,11 @@ spec:
       imagePullSecrets:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- $initContainers := (include "reposilite.deployment.initContainers" . | fromYaml) }}
+      {{- if and (hasKey $initContainers "initContainers") (gt (len $initContainers.initContainers) 0) }}
+      initContainers:
+      {{- toYaml $initContainers.initContainers | nindent 6 }}
+      {{- end }}
       {{- with .Values.deployment.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

templates/podMonitor.yaml

@@ -27,13 +27,17 @@ spec:
     honorLabels: {{ required "The honorLabels option of the podMonitor is not defined!" .Values.prometheus.metrics.podMonitor.honorLabels }}
     interval: {{ required "The scrape interval of the podMonitor is not defined!" .Values.prometheus.metrics.podMonitor.interval }}
     path: {{ required "The metric path of the podMonitor is not defined!" .Values.prometheus.metrics.podMonitor.path }}
-    port: "8080"
+    port: {{ required "The metric port of the podMonitor is not defined!" .Values.prometheus.metrics.podMonitor.port | quote }}
     {{- with .Values.prometheus.metrics.podMonitor.relabelings }}
     relabelings:
       {{- toYaml . | nindent 6 }}
     {{- end }}
     scrapeTimeout: {{ required "The scrape timeout of the podMonitor is not defined!" .Values.prometheus.metrics.podMonitor.scrapeTimeout }}
-    scheme: http
+    scheme: {{ required "The scheme of the podMonitor is not defined!" .Values.prometheus.metrics.podMonitor.scheme }}
+    {{- with .Values.prometheus.metrics.podMonitor.tlsConfig }}
+    tlsConfig:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
   namespaceSelector:
     matchNames:
     - {{ .Release.Namespace }}

templates/serviceMonitor.yaml

@@ -27,13 +27,17 @@ spec:
     honorLabels: {{ required "The honorLabels option of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.honorLabels }}
     interval: {{ required "The scrape interval of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.interval }}
     path: {{ required "The metric path of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.path }}
+    port: {{ required "The port of the serviceMonitor is not defined!" .Values.service.scheme }}
     {{- with .Values.prometheus.metrics.serviceMonitor.relabelings }}
     relabelings:
       {{- toYaml . | nindent 6 }}
     {{- end }}
     scrapeTimeout: {{ required "The scrape timeout of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.scrapeTimeout }}
-    scheme: http
-    targetPort: 8080
+    scheme: {{ required "The scheme of the serviceMonitor is not defined!" .Values.prometheus.metrics.serviceMonitor.scheme }}
+    {{- with .Values.prometheus.metrics.serviceMonitor.tlsConfig }}
+    tlsConfig:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
   namespaceSelector:
     matchNames:
     - {{ .Release.Namespace }}