AWS experiments tunables

It contains the AWS specific experiment tunables.

Managed Nodegroup

It specifies whether aws instances are part of managed nodeGroups. If instances belong to the managed nodeGroups then provide MANAGED_NODEGROUP as enable else provide it as disable. The default value is disabled.

Use the following example to tune this:

# it provided as enable if instances are part of self managed groups
# it is applicable for [ec2-terminate-by-id, ec2-terminate-by-tag]
apiVersion: litmuschaos.io/v1alpha1
kind: ChaosEngine
metadata:
  name: engine-nginx
spec:
  engineState: "active"
  annotationCheck: "false"
  chaosServiceAccount: ec2-terminate-by-tag-sa
  experiments:
  - name: ec2-terminate-by-tag
    spec:
      components:
        env:
        # if instance is part of a managed node-group
        # supports enable and disable values, default value: disable
        - name: MANAGED_NODEGROUP
          value: 'enable'
        # region for the ec2 instance
        - name: REGION
          value: '<region for instances>'
        # tag of the ec2 instance
        - name: EC2_INSTANCE_TAG
          value: 'key:value'
        - name: TOTAL_CHAOS_DURATION
          value: '60'

Mutiple Iterations Of Chaos

The multiple iterations of chaos can be tuned via setting CHAOS_INTERVAL ENV. Which defines the delay between each iteration of chaos.

Use the following example to tune this:

# defines delay between each successive iteration of the chaos
apiVersion: litmuschaos.io/v1alpha1
kind: ChaosEngine
metadata:
  name: engine-nginx
spec:
  engineState: "active"
  annotationCheck: "false"
  chaosServiceAccount: ec2-terminate-by-tag-sa
  experiments:
  - name: ec2-terminate-by-tag
    spec:
      components:
        env:
         # delay between each iteration of chaos
        - name: CHAOS_INTERVAL
          value: '15'
        # time duration for the chaos execution
        - name: TOTAL_CHAOS_DURATION
          value: '60'
        - name: REGION
          value: '<region for instances>'
        - name: EC2_INSTANCE_TAG
          value: 'key:value'