[stable/datadog] Add nodeSelector and affinity values for daemonset (#4928)

* [stable/datadog] Add nodeSelector and affinity values

* [stable/datadog] Delete duplicated nodeSelector block

* [stable/datadog] Add links for node affinity/selection

stable/datadog/Chart.yaml

@@ -1,5 +1,5 @@
 name: datadog
-version: 0.14.0
+version: 0.15.0
 appVersion: 6.2.1
 description: DataDog Agent
 keywords:

stable/datadog/README.md

@@ -59,9 +59,10 @@ The following table lists the configurable parameters of the Datadog chart and t
 | `kubeStateMetrics.enabled`  | If true, create kube-state-metrics | `true`                                    |
 | `daemonset.podAnnotations`  | Annotations to add to the DaemonSet's Pods | `nil`                             |
 | `daemonset.tolerations`     | List of node taints to tolerate (requires Kubernetes >= 1.6) | `nil`           |
+| `daemonset.nodeSelector`    | Node selectors                     | `nil`                                     |
+| `daemonset.affinity`        | Node affinities                    | `nil`                                     |
 | `daemonset.useHostNetwork`  | If true, use the host's network    | `nil`                                     |
 | `daemonset.useHostPort`     | If true, use the same ports for both host and container  | `nil`               |
-| `daemonset.nodeSelector`    | Node labels for pod assignment     | `{}`                                      |
 | `datadog.leaderElection`    | Adds the leader Election feature   | `false`                                   |
 | `datadog.leaderLeaseDuration`| The duration for which a leader stays elected.| `nil`                         |
 | `deployment.affinity`       | Node / Pod affinities              | `{}`                                      |

stable/datadog/templates/daemonset.yaml

@@ -168,6 +168,10 @@ spec:
       {{- if .Values.daemonset.tolerations }}
       tolerations:
 {{ toYaml .Values.daemonset.tolerations | indent 8 }}
+      {{- end }}
+      {{- if .Values.daemonset.affinity }}
+      affinity:
+{{ toYaml .Values.daemonset.affinity | indent 8 }}
       {{- end }}
       serviceAccountName: {{ if .Values.rbac.create }}{{ template "datadog.fullname" . }}{{ else }}"{{ .Values.rbac.serviceAccountName }}"{{ end }}
       {{- if .Values.daemonset.nodeSelector }}

stable/datadog/values.yaml

@@ -36,9 +36,13 @@ daemonset:
   ## Allow the DaemonSet to schedule on tainted nodes (requires Kubernetes >= 1.6)
   # tolerations: []
 
-  # Node labels for pod assignment
+  ## Allow the DaemonSet to schedule on selected nodes
   # Ref: https://kubernetes.io/docs/user-guide/node-selection/
-  nodeSelector: {}
+  # nodeSelector: {}
+
+  ## Allow the DaemonSet to schedule ussing affinity rules
+  # Ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
+  # affinity: {}
 
   ## Allow the DaemonSet to perform a rolling update on helm update
   ## ref: https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set/