charts(ansible): Add ansible chaos charts for running ansible experiments (#272)

Signed-off-by: Udit Gaurav <uditgaurav@gmail.com>

Co-authored-by: Karthik Satchitanand <karthik.s@mayadata.io>

charts/generic/disk-fill/ansible/engine.yaml

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+apiVersion: litmuschaos.io/v1alpha1
+kind: ChaosEngine
+metadata:
+  name: nginx-chaos
+  namespace: default
+spec:
+  # It can be true/false
+  annotationCheck: 'false'
+  # It can be active/stop
+  engineState: 'active'
+  #ex. values: ns1:name=percona,ns2:run=nginx  
+  auxiliaryAppInfo: ''
+  appinfo:
+    appns: 'default'
+    applabel: 'app=nginx'
+    appkind: 'deployment'
+  chaosServiceAccount: disk-fill-sa
+  monitoring: false
+  # It can be delete/retain
+  jobCleanUpPolicy: 'delete'
+  experiments:
+    - name: disk-fill
+      spec:
+        components:
+          env:
+            # specify the fill percentage according to the disk pressure required
+            - name: FILL_PERCENTAGE
+              value: '80'
+              
+            - name: TARGET_CONTAINER
+              value: 'nginx'
+              

charts/generic/disk-fill/ansible/experiment.yaml

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+apiVersion: litmuschaos.io/v1alpha1
+description:
+  message: |
+    Fillup Ephemeral Storage of a Resource
+kind: ChaosExperiment
+metadata:
+  name: disk-fill
+  version: 0.1.13
+spec:
+  definition:
+    scope: Cluster
+    permissions: 
+      - apiGroups:
+          - ""
+          - "apps"
+          - "batch"
+          - "litmuschaos.io"
+        resources:
+          - "jobs"
+          - "pods"
+          - "pods/exec"
+          - "pods/log"
+          - "events"
+          - "chaosengines"
+          - "chaosexperiments"
+          - "chaosresults"
+        verbs:
+          - "create"
+          - "list"
+          - "get"
+          - "patch"
+          - "update"
+          - "delete"
+    image: "litmuschaos/ansible-runner:1.6.0"
+    imagePullPolicy: Always
+    args:
+    - -c
+    - ansible-playbook ./experiments/generic/disk_fill/disk_fill_ansible_logic.yml -i /etc/ansible/hosts -vv; exit 0
+    command:
+    - /bin/bash
+    env:
+
+    - name: ANSIBLE_STDOUT_CALLBACK
+      value: 'default'
+
+    - name: TARGET_CONTAINER
+      value: ''
+    
+    - name: FILL_PERCENTAGE
+      value: '80'
+
+    - name: TOTAL_CHAOS_DURATION
+      value: '60'
+
+    # Period to wait before injection of chaos in sec
+    - name: RAMP_TIME
+      value: ''
+
+    # Provide the LIB here
+    # Only litmus supported
+    - name: LIB
+      value: 'litmus'
+
+    # Provide the container runtime path
+    # Default set to docker
+    - name: CONTAINER_PATH
+      value: '/var/lib/docker/containers'
+
+    labels:
+      name: disk-fill

charts/generic/disk-fill/ansible/rbac.yaml

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