Cometbft: enable prometheus exporter (#149)

Co-authored-by: WafflesVonMaple <scott@astria.org>

charts/sequencer/Chart.yaml

@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.8.4
+version: 0.8.5
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/sequencer/files/cometbft/config/config.toml

@@ -456,7 +456,7 @@ psql-conn = ""
 # When true, Prometheus metrics are served under /metrics on
 # PrometheusListenAddr.
 # Check out the documentation for the list of available metrics.
-prometheus = false
+prometheus = true
 
 # Address to listen for Prometheus collector(s) connections
 prometheus_listen_addr = ":26660"

charts/sequencer/templates/_helpers.tpl

@@ -30,3 +30,26 @@ Return the appropriate apiVersion for ingress.
 {{- print "extensions/v1beta1" }}
 {{- end }}
 {{- end }}
+
+
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "sequencer.name" -}}
+{{- default .Values.config.moniker | trunc 63 | trimSuffix "-" }}-sequencer
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "sequencer.labels" -}}
+{{ include "sequencer.selectorLabels" . }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "sequencer.selectorLabels" -}}
+app: {{ include "sequencer.name" . }}
+name: {{ .Values.config.moniker }}-sequencer-metrics
+{{- end }}

charts/sequencer/templates/service.yaml

@@ -34,3 +34,17 @@ spec:
   type: NodePort
   {{- end }}
 ---
+{{- if .Values.serviceMonitor.enabled }} 
+kind: Service
+apiVersion: v1
+metadata:
+  name: {{ .Values.config.moniker }}-sequencer-metrics
+  namespace: {{ .Values.global.namespace }}
+spec:
+  selector:
+    app: {{ .Values.config.moniker }}-sequencer
+  ports:
+    - name: cometbft-metrics
+      port: {{ .Values.ports.cometBFTMETRICS }}
+      targetPort: cometbft-metrics
+{{- end }}

charts/sequencer/templates/servicemonitor.yaml

@@ -0,0 +1,28 @@
+{{- if .Values.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: cometbft-metrics
+  labels:
+    {{- include "sequencer.labels" . | nindent 4 }}
+    {{- with .Values.serviceMonitor.additionalLabels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  jobLabel: cometbft-metrics
+  namespaceSelector:
+    matchNames:
+      - {{ .Values.global.namespace }}
+  selector:
+    matchLabels:
+      {{- include "sequencer.selectorLabels" . | nindent 6 }}
+  endpoints:
+    - port: {{ .Values.serviceMonitor.port }}
+      path: /metrics
+      {{- with .Values.serviceMonitor.interval }}
+      interval: {{ . }}
+      {{- end }}
+      {{- with .Values.serviceMonitor.scrapeTimeout  }}
+      scrapeTimeout: {{ . }}
+      {{- end }}
+{{- end }}

charts/sequencer/templates/statefulsets.yaml

@@ -66,6 +66,10 @@ spec:
               name: cometbft-p2p
             - containerPort: {{ .Values.ports.cometBFTRPC }}
               name: cometbft-rpc
+            {{- if .Values.serviceMonitor.enabled }} 
+            - containerPort: {{ .Values.ports.cometBFTMETRICS }}
+              name: cometbft-metrics
+            {{- end }}
       volumes:
         - name: cometbft-config-volume
           configMap:

charts/sequencer/values.yaml

@@ -80,9 +80,17 @@ images:
 ports:
   cometBFTP2P: 26656
   cometBFTRPC: 26657
+  cometBFTMETRICS: 26660
   sequencerABCI: 26658
   relayerRPC: 2450
 
+# ServiceMonitor configuration
+serviceMonitor:
+  enabled: false
+  port: 26660
+  additionalLabels:
+    release: kube-prometheus-stack
+
 storage:
   enabled: false
   local: true