litmus-hub/experiments/generic/pod-http-modify-body/experiment.yaml

apiVersion: litmuschaos.io/v1alpha1
description:
  message: |
    It injects the chaos inside the pod which modifies the body of the response from the provided application server to the body string provided by the user and reverts after a specified duration
kind: ChaosExperiment
metadata:
  name: pod-http-modify-body
  labels:
    name: pod-http-modify-body
    app.kubernetes.io/part-of: litmus
    app.kubernetes.io/component: chaosexperiment
    app.kubernetes.io/version: latest
spec:
  definition:
    scope: Namespaced
    permissions:
      # Create and monitor the experiment & helper pods
      - apiGroups: [""]
        resources: ["pods"]
        verbs: ["create","delete","get","list","patch","update", "deletecollection"]
      # Performs CRUD operations on the events inside chaosengine and chaosresult
      - apiGroups: [""]
        resources: ["events"]
        verbs: ["create","get","list","patch","update"]
      # Fetch configmaps details and mount it to the experiment pod (if specified)
      - apiGroups: [""]
        resources: ["configmaps"]
        verbs: ["get","list",]
      # Track and get the runner, experiment, and helper pods log 
      - apiGroups: [""]
        resources: ["pods/log"]
        verbs: ["get","list","watch"]  
      # for creating and managing to execute comands inside target container
      - apiGroups: [""]
        resources: ["pods/exec"]
        verbs: ["get","list","create"]
      # deriving the parent/owner details of the pod(if parent is anyof {deployment, statefulset, daemonsets})
      - apiGroups: ["apps"]
        resources: ["deployments","statefulsets","replicasets", "daemonsets"]
        verbs: ["list","get"]
      # deriving the parent/owner details of the pod(if parent is deploymentConfig)  
      - apiGroups: ["apps.openshift.io"]
        resources: ["deploymentconfigs"]
        verbs: ["list","get"]
      # deriving the parent/owner details of the pod(if parent is deploymentConfig)
      - apiGroups: [""]
        resources: ["replicationcontrollers"]
        verbs: ["get","list"]
      # deriving the parent/owner details of the pod(if parent is argo-rollouts)
      - apiGroups: ["argoproj.io"]
        resources: ["rollouts"]
        verbs: ["list","get"]
      # for configuring and monitor the experiment job by the chaos-runner pod
      - apiGroups: ["batch"]
        resources: ["jobs"]
        verbs: ["create","list","get","delete","deletecollection"]
      # for creation, status polling and deletion of litmus chaos resources used within a chaos workflow
      - apiGroups: ["litmuschaos.io"]
        resources: ["chaosengines","chaosexperiments","chaosresults"]
        verbs: ["create","list","get","patch","update","delete"]
    image: "litmuschaos/go-runner:latest"
    imagePullPolicy: Always
    args:
    - -c
    - ./experiments -name pod-http-modify-body
    command:
    - /bin/bash
    env:

    - name: TARGET_CONTAINER
      value: ''

    # provide lib image
    - name: LIB_IMAGE
      value: 'litmuschaos/go-runner:latest' 
    
    # provide the body string to overwrite the response body
    # if no value is provided, response will be an empty body.
    - name: RESPONSE_BODY
      value: ''

    # port of the target service
    - name: TARGET_SERVICE_PORT
      value: "80"

    # port on which the proxy will listen
    - name: PROXY_PORT
      value: "20000"
    
    # toxicity is the probability of the request to be affected
    # provide the percentage value in the range of 0-100
    # 0 means no request will be affected and 100 means all request will be affected
    - name: TOXICITY
      value: "100"

    # network interface on which the proxy will listen
    - name: NETWORK_INTERFACE
      value: "eth0"

    - name: TOTAL_CHAOS_DURATION
      value: '60' # in seconds

    # Time period to wait before and after injection of chaos in sec
    - name: RAMP_TIME
      value: ''

    # lib can be litmus or pumba
    - name: LIB
      value: 'litmus'

    # percentage of total pods to target
    - name: PODS_AFFECTED_PERC
      value: ''

    - name: TARGET_PODS
      value: ''

    # provide the name of container runtime
    # for litmus LIB, it supports docker, containerd, crio
    # for pumba LIB, it supports docker only
    - name: CONTAINER_RUNTIME
      value: 'docker'

    # provide the socket file path
    - name: SOCKET_PATH
      value: '/var/run/docker.sock'

    # To select pods on specific node(s)
    - name: NODE_LABEL
      value: ''

    ## it defines the sequence of chaos execution for multiple target pods
    ## supported values: serial, parallel
    - name: SEQUENCE
      value: 'parallel'
      
    labels:
      name: pod-http-modify-body
      app.kubernetes.io/part-of: litmus
      app.kubernetes.io/component: experiment-job
      app.kubernetes.io/version: latest