helm: add affinity, nodeSelectors, tolerations (#4763)

helm/templates/coder.yaml

@@ -30,9 +30,21 @@ spec:
       restartPolicy: Always
       {{- with .Values.coder.image.pullSecrets }}
       imagePullSecrets:
-        {{- toYaml . | nindent 8 }}
+      {{- toYaml . | nindent 8 }}
       {{- end }}
       terminationGracePeriodSeconds: 60
+      {{- with .Values.coder.affinity }}
+      affinity:
+      {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.coder.tolerations }}
+      tolerations:
+      {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.coder.nodeSelector }}
+      nodeSelector:
+      {{ toYaml . | nindent 8 }}
+      {{- end }}
       containers:
         - name: coder
           image: {{ include "coder.image" . | quote }}

helm/values.yaml

@@ -65,8 +65,7 @@ coder:
 
   # coder.resources -- The resources to request for Coder. These are optional
   # and are not set by default.
-  resources:
-    {}
+  resources: {}
     # limits:
     #   cpu: 100m
     #   memory: 128Mi
@@ -74,6 +73,35 @@ coder:
     #   cpu: 100m
     #   memory: 128Mi
 
+  # coder.affinity -- Allows specifying an affinity rule for the `coder` deployment.
+  # The default rule prefers to schedule coder pods on different
+  # nodes, which is only applicable if coder.replicaCount is greater than 1.
+  affinity:
+    podAntiAffinity:
+      preferredDuringSchedulingIgnoredDuringExecution:
+        - podAffinityTerm:
+            labelSelector:
+              matchExpressions:
+                - key: app.coder.com
+                  operator: In
+                  values:
+                    - "true"
+            topologyKey: kubernetes.io/hostname
+          weight: 1
+
+  # coder.tolerations -- Tolerations for tainted nodes.
+  # See: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
+  tolerations: {}
+    # - key: "key"
+    #   operator: "Equal"
+    #   value: "value"
+    #   effect: "NoSchedule"
+
+  # coder.nodeSelector -- Node labels for constraining coder pods to nodes.
+  # See: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#nodeselector
+  nodeSelector: {}
+  #  kubernetes.io/os: linux
+
   # coder.service -- The Service object to expose for Coder.
   service:
     # coder.service.enable -- Whether to create the Service object.