apiVersion: v1
kind: Namespace
metadata:
  name: sample
  labels:
    istio-injection: enabled

#!/bin/bash

set -euo pipefail

display_usage() {
    echo
    echo "USAGE: ./gen-helloworld.sh [--version] [--includeService value] [--includeDeployment value]"
    echo "    -h|--help: Prints usage information"
    echo "    --version: Specifies the version that will be returned by the helloworld service, default: 'v1'"
    echo "    --includeService: If 'true' the service will be included in the YAML, default: 'true'"
    echo "    --includeDeployment: If 'true' the deployment will be included in the YAML, default: 'true'"
}

INCLUDE_SERVICE=${INCLUDE_SERVICE:-"tru服务器托管e"}
INCLUDE_DEPLOYMENT=${INCLUDE_DEPLOYMENT:-"true"}
SERVICE_VERSION=${SERVICE_VERSION:-"v1"}
while (( "$#" )); do
  case "$1" in
    -h|--help)
      display_usage
      exit 0
      ;;

    --version)
      SERVICE_VERSION=$2
      shift 2
      ;;

    --includeService)
      INCLUDE_SERVICE=$2
      shift 2
      ;;

    --includeDeployment)
      INCLUDE_DEPLOYMENT=$2
      shift 2
      ;;

    *)
      echo "Error: Unsupported flag $1" >&2
      display_usage
      exit 1
      ;;
  esac
done

SERVICE_YAML=$(cat EOF
apiVersion: v1
kind: Service
metadata:
  name: helloworld
  labels:
    app: helloworld
    service: helloworld
spec:
  ports:
  - port: 5000
    name: http
  selector:
    app: helloworld
EOF
)

DEPLOYMENT_YAML=$(cat EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  name: helloworld-${SERVICE_VERSION}
  labels:
    app: helloworld
    version: ${SERVICE_VERSION}
spec:
  replicas: 1
  selector:
    matchLabels:
      app: helloworld
      version: ${SERVICE_VERSION}
  template:
    metadata:
      labels:
        app: helloworld
        version: ${SERVICE_VERSION}
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: topology.istio.io/subzone
                operator: In
                values:
                - ${SERVICE_VERSION}            

      containers:
      - name: helloworld
        env:
        - name: SERVICE_VERSION
          value: ${SERVICE_VERSION}
        image: docker.io/istio/examples-helloworld-v1
        resources:
          requests:
            cpu: "100m"
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 5000
EOF
)

OUT=""

# Add the service to the output.
if [[ "$INCLUDE_SERVICE" == "true" ]]; then
  OUT="${SERVICE_YAML}"
fi

# Add the deployment to the output.
if [[ "$INCLUDE_DEPLOYMENT" == "true" ]]; then
  # Add a separator
  if [[ -n "$OUT" ]]; then
    OUT+="
---
"
  fi
  OUT+="${DEPLOYMENT_YAML}"
fi

echo "$OUT"

# Sleep service
##################################################################################################
apiVersion: v1
kind: ServiceAccount
metadata:
  name: sleep
---
apiVersion: v1
kind: Service
metadata:
  name: sleep
  labels:
    app: sleep
    service: sleep
spec:
  ports:
  - port: 80
    name: http
  selector:
    app: sleep
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: sleep
spec:
  replicas: 1
  selector:
    matchLabels:
      app: sleep
  template:
    metadata:
      labels:
        app: sleep
    spec:
      terminationGracePeriodSeconds: 0
      serviceAccountName: sleep
      containers:
      - name: sleep
        image: curlimages/curl
        command: ["/bin/sleep", "infinity"]
        imagePullPolicy: IfNotPresent
        volumeMounts:
        - mountPath: /etc/sleep/tls
          name: secret-volume
      volumes:
      - name: secret-volume
        secret:
          secretName: sleep-secret
          optional: true
---

apiVersion: networking.istio.io/v1beta1
kind: DestinationRule
metadata:
  name: helloworld
  namespace: sample
spec:
  host: helloworld.sample.svc.cluster.local
  trafficPolicy:
    connectionPool:
      http:
        maxRequestsPerConnection: 1
    loadBalancer:
      simple: ROUND_ROBIN
      localityLbSetting:  #开启地域负载均衡
        enabled: true
        failover:         #配置故障转移策略，failover主要控制Region等上层位置的切换
          - from: cn-north-4
            to: cn-south-1
    outlierDetection:    #异常点检测
      consecutive5xxErrors: 1
      interval: 1s
      baseEjectionTime: 1m