(feat): Adding Openebs pool network delay chart (#135)

* (feat): Adding openebs target network delay chaos chart

Signed-off-by: Raj <raj.das@mayadata.io>

charts/openebs/openebs-pool-network-delay/engine.yaml

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+apiVersion: litmuschaos.io/v1alpha1
+kind: ChaosEngine
+metadata:
+  name: pool-chaos
+  namespace: default
+spec:
+  annotationCheck: 'false'
+  appinfo:
+    appns: 'default'
+    applabel: 'app=nginx'
+    appkind: 'deployment'
+  chaosServiceAccount: nginx-sa
+  monitoring: false
+  # It can be delete/retain
+  jobCleanUpPolicy: 'delete'
+  experiments:
+    - name: openebs-pool-network-delay
+      spec:
+        components:
+          env:
+            - name: APP_PVC
+              value: 'demo-nginx-claim' 
+
+            - name: OPENEBS_NAMESPACE
+              value: 'openebs'
+             
+            # in milliseconds
+            - name: NETWORK_DELAY
+              value: '60000'
+
+            # in milliseconds  
+            - name: TOTAL_CHAOS_DURATION
+              value: '60000'
+        

charts/openebs/openebs-pool-network-delay/experiment.yaml

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+apiVersion: litmuschaos.io/v1alpha1
+description:
+  message: |
+    Network delay to pool pod belonging to a OpenEBS PVC
+    This experiment is using pumba lib for network chaos
+kind: ChaosExperiment
+metadata:
+  labels:
+    litmuschaos.io/name: openebs
+  name: openebs-pool-network-delay
+  version: 0.1.0
+spec:
+  definition:
+    scope: Cluster
+    permissions:
+      - apiGroups:
+          - ""
+          - "apps"
+          - "litmuschaos.io"
+          - "batch"
+          - "extensions"
+          - "storage.k8s.io"
+          - "openebs.io"
+        resources:
+          - "pods"
+          - "pods/exec"
+          - "jobs"
+          - "configmaps"
+          - "services"
+          - "persistentvolumeclaims"
+          - "storageclasses"
+          - "persistentvolumes"
+          - "chaosengines"
+          - "chaosexperiments"
+          - "chaosresults"
+          - "cstorpools"
+          - "cstorvolumereplicas"
+          - "replicasets"
+        verbs:
+          - "create"
+          - "get"
+          - "list"
+          - "patch"
+          - "update"
+          - "delete"
+    image: "litmuschaos/ansible-runner:latest"
+    args:
+    - -c
+    - ansible-playbook ./experiments/openebs/openebs-pool-network-delay/openebs_pool_network_delay_ansible_logic.yml -i /etc/ansible/hosts -vv; exit 0
+    command:
+    - /bin/bash
+    env:
+    - name: ANSIBLE_STDOUT_CALLBACK
+      value: 'default'
+
+    - name: OPENEBS_NAMESPACE
+      value: 'openebs'
+
+    # only pumba supported
+    # For pumba image use : gaiaadm/pumba:0.6.5
+    - name: LIB_IMAGE  
+      value: 'gaiaadm/pumba:0.6.5' 
+
+    # in milliseconds
+    - name: NETWORK_DELAY
+      value: '60000'
+
+    # in milliseconds  
+    - name: TOTAL_CHAOS_DURATION
+      value: '60000'
+
+    - name: LIVENESS_APP_LABEL
+      value: ''
+
+    - name: LIVENESS_APP_NAMESPACE
+      value: ''
+
+    - name: DATA_PERSISTENCE
+      value: ''
+
+    labels:
+      name: openebs-pool-network-delay

charts/openebs/openebs-pool-network-delay/openebs-pool-network-delay.chartserviceversion.yaml

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+apiVersion: litmuchaos.io/v1alpha1
+kind: ChartServiceVersion
+metadata:
+  name: openebs-pool-network-delay
+  version: 0.1.0
+  annotations:
+    categories: OpenEBS
+    vendor: CNCF
+    support: https://slack.openebs.io/
+spec:
+  displayName: openebs-pool-network-delay
+  categoryDescription: >
+     Network delay to pool pod belonging to a OpenEBS PVC 
+  keywords:
+    - Kubernetes
+    - Storage Pool
+    - OpenEBS
+  platforms:
+    - GKE
+  maturity: alpha
+  maintainers:
+    - name: Raj Babu Das
+      email: raj.das@mayadata.io
+  minKubeVersion: 1.12.0
+  provider:
+    name: Mayadata
+  links:
+    - name: Source Code
+      url: https://github.com/litmuschaos/litmus/tree/master/experiments/openebs/openebs-pool-network-delay
+    - name: Documentation
+      url: https://docs.litmuschaos.io/docs/openebs-pool-network-delay/
+    - name: Video
+      url: 
+  icon:
+    - url: ""
+      mediatype: ""
+  chaosexpcrdlink: https://raw.githubusercontent.com/litmuschaos/chaos-charts/master/charts/openebs/openebs-pool-network-delay/experiment.yaml

charts/openebs/openebs-pool-network-delay/rbac.yml

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+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: nginx-sa
+  namespace: openebs
+  labels:
+    name: nginx-sa
+---
+# Source: openebs/templates/clusterrole.yaml
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: nginx-sa
+  labels:
+    name: nginx-sa
+rules:
+- apiGroups: ["","apps","litmuschaos.io","batch","extensions","storage.k8s.io","openebs.io"]
+  resources: ["pods","pods/exec","jobs","configmaps","services","persistentvolumeclaims","storageclasses","persistentvolumes","chaosengines","chaosexperiments","chaosresults","cstorpools","cstorvolumereplicas","replicasets"]
+  verbs: ["create","list","get","patch","update","delete"]
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: nginx-sa
+  labels:
+    name: nginx-sa
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: nginx-sa
+subjects:
+- kind: ServiceAccount
+  name: nginx-sa
+  namespace: openebs