Update Postgres Helm Chart to include instrumentation (CrunchyData#299)

* Update postgres.yaml

* Update values.yaml

* Update postgres.yaml

* Apply suggestions from code review

Co-authored-by: Drew Sessler <[email protected]>

---------

Co-authored-by: Drew Sessler <[email protected]>

Author: benjaminjb

helm/postgres/templates/postgres.yaml

@@ -185,6 +185,26 @@ spec:
 {{ toYaml .Values.monitoringConfig | indent 8 }}
         {{- end }}
   {{- end }}
+  {{- if .Values.instrumentation }}
+  instrumentation:
+    config:
+    {{- if .Values.instrumentationConfig }}
+{{ toYaml .Values.instrumentationConfig | indent 6 }}
+    {{- end }}
+    image: {{ default "" .Values.instrumentationImage | quote }}
+    logs:
+    {{- if .Values.instrumentationLogs }}
+{{ toYaml .Values.instrumentationLogs | indent 6 }}
+    {{- end }}
+    metrics:
+    {{- if .Values.instrumentationMetrics }}
+{{ toYaml .Values.instrumentationMetrics | indent 6 }}
+    {{- end }}
+    resources:
+    {{- if .Values.instrumentationResources }}
+{{ toYaml .Values.instrumentationResources | indent 6 }}
+    {{- end }}
+  {{- end }}
   {{- if .Values.shutdown }}
   shutdown: true
   {{- end }}

helm/postgres/values.yaml

@@ -39,6 +39,13 @@ postgresVersion: 17
 # below.
 # monitoring: false
 
+# instrumentation enables the ability to monitor the Postgres cluster through an
+# OpenTelemetry collector. This defaults to the value below.
+# This feature is currently behind the feature gates OpenTelemetryLogs and
+# OpenTelemetryMetrics; at least one of these feature gates must be turned
+# on for `instrumentation` to be turned on.
+# instrumentation: false
+
 ###################
 # Image Overrides #
 ###################
@@ -278,6 +285,16 @@ postgresVersion: 17
 # "monitoring" setting.
 # monitoringConfig: {}
 
+# The following "instrumentation_" fields will set the specified parts of the instrumentation
+# spec. To enable instrumentation, you need to set the "instrumentation" setting to "true".
+# This feature is currently behind the feature gates OpenTelemetryMetrics and OpenTelemetryLogs.
+
+# instrumentationConfig: {}
+# instrumentationImage: ""
+# instrumentationLogs: {}
+# instrumentationMetrics: {}
+# instrumentationResources: {}
+
 #######################
 # Kubernetes Settings #
 #######################