configure resource requests and limits for native k8s executors

Author: loujar

charts/sourcegraph-executor/k8s/templates/executor.Deployment.yaml

@@ -68,6 +68,10 @@ spec:
           {{- toYaml . | trim | nindent 12 }}
           {{- end }}
           {{- end }}
+          {{- if not .Values.sourcegraph.localDevMode }}
+          resources:
+            {{- toYaml .Values.executor.resources | nindent 12 }}
+          {{- end }}
           livenessProbe:
             exec:
               command:

charts/sourcegraph-executor/k8s/values.yaml

@@ -15,6 +15,8 @@ sourcegraph:
   imagePullSecrets: [ ]
   # -- Add a global label to all resources
   labels: { }
+  # -- When true, remove all resource stanzas, allowing the scheduler to best-fit pods. Intended for local development with limited resources.
+  localDevMode: false
   # -- Set a custom name for the app.kubernetes.io/name annotation
   nameOverride: ""
   # -- Affinity,
@@ -59,6 +61,13 @@ executor:
   image:
     defaultTag: 6.0.0@sha256:6dc771a0c281a41ef676213f2f84a63d99045cf2e58d43022554a8022070ed65
     name: "executor-kubernetes"
+  resources:
+    limits:
+      cpu: "1"
+      memory: 1Gi
+    requests:
+      cpu: 500m
+      memory: 200Mi
   # -- The external URL of the Sourcegraph instance. Required. **Recommended:** set to the internal service endpoint (e.g. `http://sourcegraph-frontend.sourcegraph.svc.cluster.local:30080` if Sourcegraph is deployed in the `sourcegraph` namespace). 
   # This will avoid unnecessary network charges as traffic will stay within the local network.
   frontendUrl: ""