Feature(Chart): Chaos charts for Docker Service Kill experiment (#261)

* Chaos charts for Docker Service Kill experiment

charts/generic/docker-service-kill/docker-service-kill.chartserviceversion.yaml

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+apiVersion: litmuchaos.io/v1alpha1
+kind: ChartServiceVersion
+metadata:
+  name: docker-service-kill 
+  version: 0.1.0
+  annotations:
+    categories: docker-service-kill
+    repository: https://github.com/litmuschaos/litmus-ansible/tree/master/generic/docker-service-kill
+    support: https://kubernetes.slack.com/messages/CNXNB0ZTN
+spec:
+  displayName: docker-service-kill 
+  categoryDescription: >
+    Randomly stops Docker services temporarily 
+  keywords: ['pods', 'kubernetes', 'nginx'] 
+  maturity: alpha 
+  minKubeVersion: 1.12.0 
+  provider: {'name': 'Wipro'}
+  maintainers: ['ankur.ghosh3@wipro.com'] 
+  contributors: ['ankur.ghosh3@wipro.com'] 
+  links: ['https://docs.litmuschaos.io/docs/getstarted/'] 
+  icon:
+    - url: 
+      mediatype: ""

charts/generic/docker-service-kill/engine.yaml

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+apiVersion: litmuschaos.io/v1alpha1
+kind: ChaosEngine
+metadata:
+  name: nginx-chaos
+  namespace: default
+spec:
+  appinfo:
+    appns: 'default'
+    applabel: 'app=nginx'
+    appkind: 'deployment'
+  # It can be true/false
+  annotationCheck: 'false'
+  # It can be active/stop
+  engineState: 'active'
+  #ex. values: ns1:name=percona,ns2:run=nginx
+  auxiliaryAppInfo: ''
+  chaosServiceAccount: docker-service-kill-sa
+  monitoring: false
+  # It can be delete/retain
+  jobCleanUpPolicy: 'delete'
+  experiments:
+    - name: docker-service-kill
+      spec:
+        components:
+          env:
+            # set chaos duration (in sec) as desired
+            - name: TOTAL_CHAOS_DURATION
+              value: '90'

charts/generic/docker-service-kill/experiment.yaml

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+apiVersion: litmuschaos.io/v1alpha1
+description:
+  message: |
+    Kills the docker service on the application node to check the resiliency.
+kind: ChaosExperiment
+metadata:
+  name: docker-service-kill
+  version: 0.1.0
+spec:
+  definition:
+    scope: Cluster
+    permissions:
+      - apiGroups:
+          - ""
+          - "batch"
+          - "apps"
+          - "litmuschaos.io"
+        resources:
+          - "jobs"
+          - "pods"
+          - "pods/log"
+          - "events"
+          - "chaosengines"
+          - "chaosexperiments"
+          - "chaosresults"
+        verbs:
+          - "create"
+          - "list"
+          - "get"
+          - "patch"
+          - "update"
+          - "delete"
+      - apiGroups:
+          - ""
+        resources:
+          - "nodes"
+        verbs:
+          - "get"
+          - "list"
+    image: "litmuschaos/ansible-runner:ci"
+    imagePullPolicy: Always
+    args:
+    - -c
+    - ansible-playbook ./experiments/generic/docker_service_kill/docker_service_kill_ansible_logic.yml -i /etc/ansible/hosts -vv; exit 0
+    command:
+    - /bin/bash
+    env:
+    - name: ANSIBLE_STDOUT_CALLBACK
+      value: 'default'
+
+    - name: TOTAL_CHAOS_DURATION
+      value: '90' # in seconds
+
+    # Period to wait before injection of chaos in sec
+    - name: RAMP_TIME
+      value: ''
+
+    - name: LIB
+      value: 'litmus'
+    labels:
+      name: docker-service-kill
+

charts/generic/docker-service-kill/rbac.yaml

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+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: docker-service-kill-sa
+  namespace: default
+  labels:
+    name: docker-service-kill-sa
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: docker-service-kill-sa
+  labels:
+    name: docker-service-kill-sa
+rules:
+- apiGroups: ["","litmuschaos.io","batch","apps"]
+  resources: ["pods","jobs","pods/log","events","chaosengines","chaosexperiments","chaosresults"]
+  verbs: ["create","list","get","patch","update","delete"]
+- apiGroups: [""]
+  resources: ["nodes"]
+  verbs: ["get","list"]
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: docker-service-kill-sa
+  labels:
+    name: docker-service-kill-sa
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: docker-service-kill-sa
+subjects:
+- kind: ServiceAccount
+  name: docker-service-kill-sa
+  namespace: default