tls-app.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: certificate-init
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: certificate-init
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
subjects:
- kind: ServiceAccount
  name: certificate-init
---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: tls-app
  labels:
    app: tls-app
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: tls-app
    spec:
      serviceAccountName: certificate-init
      initContainers:
        - name: certificate-init-container
          image: gcr.io/hightowerlabs/certificate-init-container:0.0.1
          imagePullPolicy: Always
          env:
            - name: NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
          args:
            - "-additional-dnsnames=example.com"
            - "-cert-dir=/etc/tls"
            - "-namespace=$(NAMESPACE)"
            - "-pod-ip=$(POD_IP)"
            - "-pod-name=$(POD_NAME)"
            - "-service-names=tls-app"            
          volumeMounts:
            - name: tls
              mountPath: /etc/tls
      containers:
        - name: tls-app
          image: gcr.io/hightowerlabs/tls-app:1.0.0
          imagePullPolicy: Always
          args:
            - "-tls-cert=/etc/tls/tls.crt"
            - "-tls-key=/etc/tls/tls.key"
          ports:
            - containerPort: 443 
          resources:
            limits:
              memory: "50Mi"
              cpu: "100m"
          volumeMounts:
            - name: tls
              mountPath: /etc/tls
      volumes:
        - name: tls
          emptyDir: {}