[kapacitor] add affinity and tolerations (#445)

charts/kapacitor/Chart.yaml

 apiVersion: v1
 name: kapacitor
-version: 1.4.4
+version: 1.4.5
 appVersion: 1.6.3
 description: InfluxDB's native data processing engine. It can process both stream
   and batch data from InfluxDB.

charts/kapacitor/README.md

@@ -61,7 +61,7 @@ The following table lists configurable parameters, their descriptions, and their
 | `resources.limits.memory` | Kapacitor memory limit | `2Gi` |
 | `resources.limits.cpu` | Kapacitor cpu limit | `2` |
 | `envVars` | Environment variables to set initial Kapacitor configuration (https://hub.docker.com/_/kapacitor/) | `{}` |
-| `influxURL` | InfluxDB url used to interact with Kapacitor (also can be set with ```envVars.KAPACITOR_INFLUXDB_0_URLS_0```) | `http://influxdb-influxdb.tick:8086` |
+| `influxURL` | InfluxDB url used to interact with Kapacitor | `http://influxdb-influxdb.tick:8086` |
 | `existingSecret` | Name of an existing Secrect used to set the environment variables for the InfluxDB user and password. The expected keys in the secret are `influxdb-user` and `influxdb-password`. |
 | `rbac.create` | Create and use RBAC resources | `true` |
 | `rbac.namespaced` | Creates Role and Rolebinding instead of the default ClusterRole and ClusteRoleBindings for the Kapacitor instance  | `false` |

charts/kapacitor/templates/deployment.yaml

@@ -92,6 +92,14 @@ spec:
           - name: sc-sideload-volume
             mountPath: "/var/lib/kapacitor/sideload"
 {{- end }}
+      {{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
+      {{- end }}
+      {{- if .Values.tolerations }}
+      tolerations:
+{{ toYaml .Values.tolerations | indent 8 }}
+      {{- end }}
       volumes:
         - name: data
         {{- if .Values.persistence.enabled }}

charts/kapacitor/values.yaml

@@ -71,6 +71,20 @@ resources:
 ##
 # existingSecret: influxdb-auth
 
+## Affinity for pod assignment
+## Ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
+##
+affinity: {}
+
+## Tolerations for pod assignment
+## Ref: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/
+##
+tolerations: []
+# - key: "key"
+#   operator: "Equal|Exists"
+#   value: "value"
+#   effect: "NoSchedule|PreferNoSchedule|NoExecute(1.6 only)"
+
 ## Role based access control
 rbac:
   create: true