scalemongodbShards.yaml

apiVersion: v1
kind: Service
metadata:
  name: mongodbshardservice2
  labels:
    name: mongoshard
spec:
  ports:
  - port: 27017
    targetPort: 27017
  clusterIP: None
  selector:
    role: mongoshard
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: mongodbshardstateful2
spec:
  selector:
    matchLabels:
      role: mongoshard
  serviceName: mongodbshardservice2
  replicas: 1
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        role: mongoshard
        replicaset: mongoshards2
    spec:
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 50 #set to 100
            podAffinityTerm:
              labelSelector:
                matchExpressions:
                - key: replicaset
                  operator: In
                  values:
                  - mongoshards2
              topologyKey: kubernetes.io/hostname
      terminationGracePeriodSeconds: 10      
      containers:
        - name: mongodshardcontainer
          image: mongo:3.6.2
          command:
            - "numactl"
            - "--interleave=all"
            - "mongod"
            - "--shardsvr"            
            - "--replSet"
            - "mongoreplicaset2shard"
            - "--bind_ip_all"
            - "--port"
            - "27017"
           # - "--wiredTigerCacheSizeGB"
           # - "0.5"
           # - "--auth"
           # - "--clusterAuthMode"
           # - "keyFile" or can be "x509"
           # - "--keyFile"
           # - "keyfile path"
           # - "--setParameter"
           # - "authenticationMechanisms=SCRAM-SHA-1"
          ports:
            - containerPort: 27017
          lifecycle:
            #postStart:
              #exec:
                #command: ["/bin/sh", "-c", "rm -rfd /data/db/*"]
            preStop:
              exec:
                command: ["/bin/sh", "-c", "rm -rfd /data/db/*"]
          volumeMounts:           
            - name: mongodbshardpvc2
              mountPath: /data/db
          readinessProbe:
            exec:
              command:
              - mongo
              - --eval
              - "db.getMongo()"
            initialDelaySeconds: 30
            periodSeconds: 20
            timeoutSeconds: 120
            failureThreshold: 6
          livenessProbe:
            exec:
              command:
              - mongo
              - --eval
              - "db.getMongo()"
            initialDelaySeconds: 30
            periodSeconds: 20
            timeoutSeconds: 120
            failureThreshold: 6
  volumeClaimTemplates:
  - metadata:
      name: mongodbshardpvc2
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: sharedfs
      resources:
        requests:
          storage: 5Gi