kubernetes-manifests/loadgenerator.yaml

# Copyright 2018 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
apiVersion: apps/v1
kind: Deployment
metadata:
  name: loadgenerator
  labels:
    app: loadgenerator
spec:
  selector:
    matchLabels:
      app: loadgenerator
  replicas: 1
  template:
    metadata:
      labels:
        app: loadgenerator
      annotations:
        sidecar.istio.io/rewriteAppHTTPProbers: "true"
    spec:
      serviceAccountName: loadgenerator
      terminationGracePeriodSeconds: 5
      restartPolicy: Always
      securityContext:
        fsGroup: 1000
        runAsGroup: 1000
        runAsNonRoot: true
        runAsUser: 1000
      initContainers:
      - command:
        - /bin/sh
        - -exc
        - |
          MAX_RETRIES=12
          RETRY_INTERVAL=10
          for i in $(seq 1 $MAX_RETRIES); do
            echo "Attempt $i: Pinging frontend: ${FRONTEND_ADDR}..."
            STATUSCODE=$(wget --server-response http://${FRONTEND_ADDR} 2>&1 | awk '/^  HTTP/{print $2}')
            if [ $STATUSCODE -eq 200 ]; then
                echo "Frontend is reachable."
                exit 0
            fi
            echo "Error: Could not reach frontend - Status code: ${STATUSCODE}"
            sleep $RETRY_INTERVAL
          done
          echo "Failed to reach frontend after $MAX_RETRIES attempts."
          exit 1
        name: frontend-check
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
              - ALL
          privileged: false
          readOnlyRootFilesystem: true
        image: busybox:latest
        env:
        - name: FRONTEND_ADDR
          value: "frontend:80"
      containers:
      - name: main
        securityContext:
          allowPrivilegeEscalation: false
          capabilities:
            drop:
              - ALL
          privileged: false
          readOnlyRootFilesystem: true
        image: loadgenerator
        env:
        - name: FRONTEND_ADDR
          value: "frontend:80"
        - name: USERS
          value: "10"
        - name: RATE
          value: "1"
        resources:
          requests:
            cpu: 300m
            memory: 256Mi
          limits:
            cpu: 500m
            memory: 512Mi
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: loadgenerator