[stable/nats] support for deploying nats with "Deployment"

stable/nats/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: nats
-version: 2.4.2
+version: 2.5.0
 appVersion: 1.4.1
 description: An open-source, cloud-native messaging system
 keywords:

stable/nats/README.md

@@ -68,6 +68,7 @@ The following table lists the configurable parameters of the NATS chart and thei
 | `maxConnections`                     | Max. number of client connections                                                            | `nil`                                                         |
 | `maxControlLine`                     | Max. protocol control line                                                                   | `nil`                                                         |
 | `maxPayload`                         | Max. payload                                                                                 | `nil`                                                         |
+| `mode`                               | NATS cluster running mode                                                                    | `statefulset`                                                 |
 | `writeDeadline`                      | Duration the server can block on a socket write to a client                                  | `nil`                                                         |
 | `replicaCount`                       | Number of NATS nodes                                                                         | `1`                                                           |
 | `securityContext.enabled`            | Enable security context                                                                      | `true`                                                        |

stable/nats/templates/deployment.yaml

@@ -0,0 +1,162 @@
+{{- if eq .Values.mode "deployment" }}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ template "nats.fullname" . }}
+  labels:
+    app: "{{ template "nats.name" . }}"
+    chart: "{{ template "nats.chart" . }}"
+    release: {{ .Release.Name | quote }}
+    heritage: {{ .Release.Service | quote }}
+spec:
+  serviceName: {{ template "nats.fullname" . }}-headless
+  replicas: {{ .Values.replicaCount }}
+  strategy:
+    rollingUpdate:
+      maxSurge: {{ .Values.deployment.maxSurge }}
+      maxUnavailable: {{ .Values.deployment.maxUnavailable }}
+    type: {{ .Values.deployment.updateType }}
+  selector:
+    matchLabels:
+      app: "{{ template "nats.name" . }}"
+      release: {{ .Release.Name | quote }}
+  template:
+    metadata:
+      labels:
+        app: "{{ template "nats.name" . }}"
+        chart: "{{ template "nats.chart" . }}"
+        release: {{ .Release.Name | quote }}
+        {{- if .Values.podLabels }}
+{{ toYaml .Values.podLabels | indent 8 }}
+        {{- end }}
+{{- if or .Values.podAnnotations .Values.metrics.enabled }}
+      annotations:
+{{- if .Values.podAnnotations }}
+{{ toYaml .Values.podAnnotations | indent 8 }}
+{{- end }}
+{{- if .Values.metrics.podAnnotations }}
+{{ toYaml .Values.metrics.podAnnotations | indent 8 }}
+{{- end }}
+{{- end }}
+    spec:
+{{- include "nats.imagePullSecrets" . | indent 6 }}
+      {{- if .Values.securityContext.enabled }}
+      securityContext:
+        fsGroup: {{ .Values.securityContext.fsGroup }}
+        runAsUser: {{ .Values.securityContext.runAsUser }}
+      {{- end }}
+      {{- if .Values.priorityClassName }}
+      priorityClassName: {{ .Values.priorityClassName | quote }}
+      {{- end }}
+      {{- if .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml .Values.nodeSelector | indent 8 }}
+      {{- end }}
+      {{- if .Values.tolerations }}
+      tolerations:
+{{ toYaml .Values.tolerations | indent 8 }}
+      {{- end }}
+      {{- if .Values.schedulerName }}
+      schedulerName: {{ .Values.schedulerName | quote }}
+      {{- end }}
+      {{- if eq .Values.antiAffinity "hard" }}
+      affinity:
+        podAntiAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - topologyKey: "kubernetes.io/hostname"
+              labelSelector:
+                matchLabels:
+                  app: "{{ template "nats.name" . }}"
+                  release: {{ .Release.Name | quote }}
+      {{- else if eq .Values.antiAffinity "soft" }}
+      affinity:
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+          - weight: 1
+            podAffinityTerm:
+              topologyKey: kubernetes.io/hostname
+              labelSelector:
+                matchLabels:
+                  app: "{{ template "nats.name" . }}"
+                  release: {{ .Release.Name | quote }}
+      {{- end }}
+      containers:
+      - name: {{ template "nats.name" . }}
+        image: {{ template "nats.image" . }}
+        imagePullPolicy: {{ .Values.image.pullPolicy }}
+        command:
+        - gnatsd
+        args:
+        - -c
+        - /opt/nats/gnatsd.conf
+        {{- if .Values.extraArgs }}
+{{ toYaml .Values.extraArgs | indent 8 }}
+        {{- end }}
+        ports:
+        - name: client
+          containerPort: {{ .Values.client.service.port }}
+        - name: cluster
+          containerPort: {{ .Values.cluster.service.port }}
+        - name: monitoring
+          containerPort: {{ .Values.monitoring.service.port }}
+        {{- if .Values.livenessProbe.enabled }}
+        livenessProbe:
+          httpGet:
+            path: /
+            port: monitoring
+          initialDelaySeconds: {{ .Values.livenessProbe.initialDelaySeconds }}
+          periodSeconds: {{ .Values.livenessProbe.periodSeconds }}
+          timeoutSeconds: {{ .Values.livenessProbe.timeoutSeconds }}
+          successThreshold: {{ .Values.livenessProbe.successThreshold }}
+          failureThreshold: {{ .Values.livenessProbe.failureThreshold }}
+        {{- end }}
+        {{- if .Values.readinessProbe.enabled }}
+        readinessProbe:
+          httpGet:
+            path: /
+            port: monitoring
+          initialDelaySeconds: {{ .Values.readinessProbe.initialDelaySeconds }}
+          periodSeconds: {{ .Values.readinessProbe.periodSeconds }}
+          timeoutSeconds: {{ .Values.readinessProbe.timeoutSeconds }}
+          successThreshold: {{ .Values.readinessProbe.successThreshold }}
+          failureThreshold: {{ .Values.readinessProbe.failureThreshold }}
+        {{- end }}
+        resources:
+{{ toYaml .Values.resources | indent 10 }}
+        volumeMounts:
+          - name: config
+            mountPath: /opt/nats/gnatsd.conf
+            subPath: gnatsd.conf
+        {{- if .Values.sidecars }}
+{{ toYaml .Values.sidecars | indent 6 }}
+        {{- end }}
+{{- if .Values.metrics.enabled }}
+      - name: metrics
+        image: {{ template "nats.metrics.image" . }}
+        imagePullPolicy: {{ .Values.metrics.image.pullPolicy | quote }}
+        args:
+{{ toYaml .Values.metrics.args | indent 10 -}}
+          - "http://localhost:{{ .Values.monitoring.service.port }}"
+        ports:
+        - name: metrics
+          containerPort: {{ .Values.metrics.port }}
+        livenessProbe:
+          httpGet:
+            path: /metrics
+            port: metrics
+          initialDelaySeconds: 15
+          timeoutSeconds: 5
+        readinessProbe:
+          httpGet:
+            path: /metrics
+            port: metrics
+          initialDelaySeconds: 5
+          timeoutSeconds: 1
+        resources:
+{{ toYaml .Values.metrics.resources | indent 10 }}
+{{- end }}
+      volumes:
+      - name: config
+        configMap:
+          name: {{ template "nats.fullname" . }}
+{{- end }}

stable/nats/templates/statefulset.yaml

@@ -1,3 +1,4 @@
+{{- if eq .Values.mode "statefulset" }}
 apiVersion: apps/v1beta2
 kind: StatefulSet
 metadata:
@@ -163,3 +164,4 @@ spec:
       - name: config
         configMap:
           name: {{ template "nats.fullname" . }}
+{{- end }}

stable/nats/values-production.yaml

@@ -65,14 +65,26 @@ podLabels: {}
 ##
 # priorityClassName: ""
 
-## Update strategy, can be set to RollingUpdate or OnDelete by default.
+## nats-cluster running mode. Allowed values: statefulset (default) or deployment
+## ref:
+## - https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/
+## - https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
+mode: "statefulset"
+
+## Update strategy for statefulset, can be set to RollingUpdate or OnDelete by default.
 ## https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/#updating-statefulsets
 statefulset:
   updateStrategy: OnDelete
   ## Partition update strategy
   ## https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#partitions
   # rollingUpdatePartition:
 
+## Update strategy for deployment, can be set to RollingUpdate or OnDelete by default.
+## https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy
+deployment:
+  updateType: RollingUpdate
+  # maxSurge: 25%
+  # maxUnavailable: 25%
 
 ## Configure resource requests and limits
 ## ref: http://kubernetes.io/docs/user-guide/compute-resources/

stable/nats/values.yaml

@@ -69,14 +69,26 @@ podLabels: {}
 ##
 # priorityClassName: ""
 
-## Update strategy, can be set to RollingUpdate or OnDelete by default.
+## nats-cluster running mode. Allowed values: statefulset (default) or deployment
+## ref:
+## - https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/
+## - https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
+mode: "statefulset"
+
+## Update strategy for statefulset, can be set to RollingUpdate or OnDelete by default.
 ## https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/#updating-statefulsets
 statefulset:
   updateStrategy: OnDelete
   ## Partition update strategy
   ## https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#partitions
   # rollingUpdatePartition:
 
+## Update strategy for deployment, can be set to RollingUpdate or OnDelete by default.
+## https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#strategy
+deployment:
+  updateType: RollingUpdate
+  # maxSurge: 25%
+  # maxUnavailable: 25%
 
 ## Configure resource requests and limits
 ## ref: http://kubernetes.io/docs/user-guide/compute-resources/