snowplow-iglu-server: toleration and topologySpreadConstraints (closes #194)

[ianarsenault]

Add support for tolerations and topologySpreadConstraints

Below is output from helm template snowplow-iglu-server with and without tolerations and topology spread constraints being set

➜ helm template snowplow-iglu-server
<truncated>
---
# Source: snowplow-iglu-server/templates/iglu-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: release-name-app
  labels:
    helm.sh/chart: snowplow-iglu-server-0.9.0
    app.kubernetes.io/version: "0.9.0"
    app.kubernetes.io/managed-by: Helm
spec:
  selector:
    matchLabels:
      app: release-name-app
  template:
    metadata:
      labels:
        app: release-name-app
        helm.sh/chart: snowplow-iglu-server-0.9.0
        app.kubernetes.io/version: "0.9.0"
        app.kubernetes.io/managed-by: Helm
      annotations:
        checksum/config: "f786bb986a29772d4b6bd8d30637545bb4a96d1445322376cdf913913563bf8a"
    spec:
      automountServiceAccountToken: true
      terminationGracePeriodSeconds: 630

      volumes:

      containers:
      - name: release-name-app
        image: snowplow/iglu-server:0.12.0-distroless
        imagePullPolicy: IfNotPresent

        args:
        - "--config"
        -  "/dev/null" 

        ports:
        - containerPort: 8080
          protocol: TCP

        env:
        - name: "ACCEPT_LIMITED_USE_LICENSE"
          value: "no"
        - name : "CONFIG_FORCE_iglu_repoServer_port"
          value: "8080"
        - name : "CONFIG_FORCE_iglu_repoServer_maxConnections"
          value: "16384"
        - name : "CONFIG_FORCE_iglu_repoServer_idleTimeout"
          value: "65 seconds"
        - name : "CONFIG_FORCE_iglu_repoServer_hsts_enable"
          value: "true"
        - name : "CONFIG_FORCE_iglu_database_type"
          value: "dummy"
        - name : "CONFIG_FORCE_iglu_database_host"
          value: ""
        - name : "CONFIG_FORCE_iglu_database_port"
          value: "5432"
        - name : "CONFIG_FORCE_iglu_database_dbname"
          value: ""
        - name : "CONFIG_FORCE_iglu_patchesAllowed"
          value: "false"
        - name : "JDK_JAVA_OPTIONS"
          value: "-Dconfig.override_with_env_vars=true "

        envFrom:
        - secretRef:
            name: release-name-secret

        livenessProbe:
          httpGet:
            path: /api/meta/health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 30
          periodSeconds: 5
          timeoutSeconds: 5
          failureThreshold: 3

        readinessProbe:
          httpGet:
            path: /api/meta/health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 5
          periodSeconds: 5
          timeoutSeconds: 5
          failureThreshold: 3
          successThreshold: 2 

        resources:
          limits:
            cpu: 746m
            memory: 900Mi
          requests:
            cpu: 400m
            memory: 512Mi

        volumeMounts:
---

With tolerations and topologySpreadConstraint being set

➜ helm template snowplow-iglu-server \                                                        
  --set "service.tolerations[0].key=key1" \
  --set "service.tolerations[0].operator=Exists" \
  --set "service.tolerations[0].effect=NoSchedule" \
  --set "service.topologySpreadConstraints[0].maxSkew=1" \
  --set "service.topologySpreadConstraints[0].topologyKey=topology.kubernetes.io/zone" \
  --set "service.topologySpreadConstraints[0].whenUnsatisfiable=DoNotSchedule"
  
  
  
  # Source: snowplow-iglu-server/templates/iglu-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: release-name-app
  labels:
    helm.sh/chart: snowplow-iglu-server-0.9.0
    app.kubernetes.io/version: "0.9.0"
    app.kubernetes.io/managed-by: Helm
spec:
  selector:
    matchLabels:
      app: release-name-app
  template:
    metadata:
      labels:
        app: release-name-app
        helm.sh/chart: snowplow-iglu-server-0.9.0
        app.kubernetes.io/version: "0.9.0"
        app.kubernetes.io/managed-by: Helm
      annotations:
        checksum/config: "6d66497e23af0d7ae4cc674ffea3cf2bb9c5335d37f058ba60a8e3f9d53847d4"
    spec:
      automountServiceAccountToken: true
      terminationGracePeriodSeconds: 630
      tolerations:
        - effect: NoSchedule
          key: key1
          operator: Exists
      topologySpreadConstraints:
        - maxSkew: 1
          topologyKey: topology.kubernetes.io/zone
          whenUnsatisfiable: DoNotSchedule

      volumes:

      containers:
      - name: release-name-app
        image: snowplow/iglu-server:0.12.0-distroless
        imagePullPolicy: IfNotPresent

        args:
        - "--config"
        -  "/dev/null" 

        ports:
        - containerPort: 8080
          protocol: TCP

        env:
        - name: "ACCEPT_LIMITED_USE_LICENSE"
          value: "no"
        - name : "CONFIG_FORCE_iglu_repoServer_port"
          value: "8080"
        - name : "CONFIG_FORCE_iglu_repoServer_maxConnections"
          value: "16384"
        - name : "CONFIG_FORCE_iglu_repoServer_idleTimeout"
          value: "65 seconds"
        - name : "CONFIG_FORCE_iglu_repoServer_hsts_enable"
          value: "true"
        - name : "CONFIG_FORCE_iglu_database_type"
          value: "dummy"
        - name : "CONFIG_FORCE_iglu_database_host"
          value: ""
        - name : "CONFIG_FORCE_iglu_database_port"
          value: "5432"
        - name : "CONFIG_FORCE_iglu_database_dbname"
          value: ""
        - name : "CONFIG_FORCE_iglu_patchesAllowed"
          value: "false"
        - name : "JDK_JAVA_OPTIONS"
          value: "-Dconfig.override_with_env_vars=true "

        envFrom:
        - secretRef:
            name: release-name-secret

        livenessProbe:
          httpGet:
            path: /api/meta/health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 30
          periodSeconds: 5
          timeoutSeconds: 5
          failureThreshold: 3

        readinessProbe:
          httpGet:
            path: /api/meta/health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 5
          periodSeconds: 5
          timeoutSeconds: 5
          failureThreshold: 3
          successThreshold: 2 

        resources:
          limits:
            cpu: 746m
            memory: 900Mi
          requests:
            cpu: 400m
            memory: 512Mi

        volumeMounts:
  <truncated>

[Andy-Hay]

LGTM