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EBS loss by ID

EBS (Elastic Block Store) loss by ID disrupts the state of EBS volume by detaching it from the node (or EC2) instance using volume ID for a certain duration. In case of EBS persistent volumes, the volumes can self-attach, and the re-attachment step can be skipped.

EBS Loss By ID

Use cases

EBS loss by ID tests the deployment sanity (replica availability and uninterrupted service) and recovery workflows of the application pod.


  • Kubernetes >= 1.17
  • Appropriate AWS access to attach or detach an EBS volume for the instance.
  • The EBS volume should be attached to the instance.
  • The Kubernetes secret should have AWS access configuration (key) in the CHAOS_NAMESPACE. Below is a sample secret file:
    apiVersion: v1
    kind: Secret
    name: cloud-secret
    type: Opaque
    cloud_config.yml: |-
    # Add the cloud AWS credentials respectively
    aws_access_key_id = XXXXXXXXXXXXXXXXXXX
    aws_secret_access_key = XXXXXXXXXXXXXXX

HCE recommends that you use the same secret name, that is, cloud-secret. Otherwise, you will need to update the AWS_SHARED_CREDENTIALS_FILE environment variable in the fault template with the new secret name and you won't be able to use the default health check probes.

Below is an example AWS policy to execute the fault.

"Version": "2012-10-17",
"Statement": [
"Effect": "Allow",
"Action": [
"Resource": "*"
"Effect": "Allow",
"Action": "ec2:DescribeVolumes",
"Resource": "*"
"Effect": "Allow",
"Action": [
"Resource": "*"

Mandatory tunables

Tunable Description Notes
EBS_VOLUME_ID Comma-separated list of volume IDs subject to EBS detach. For example, ebs-vol-1,ebs-vol-2. For more information, go to detach volumes by ID.
REGION Region name for the target volumes. For example, us-east-1.

Optional tunables

Tunable Description Notes
TOTAL_CHAOS_DURATION Duration that you specify, through which chaos is injected into the target resource (in seconds). Default: 30 s. For more information, go to duration of the chaos.
AWS_SHARED_CREDENTIALS_FILE Path to the AWS secret credentials. Default: /tmp/cloud_config.yml.
CHAOS_INTERVAL Time interval between the attachment and detachment of the volumes (in seconds). Default: 30 s. For more information, go to chaos interval.
SEQUENCE Sequence of chaos execution for multiple volumes. Default: parallel. Supports serial sequence as well. For more information, go to sequence of chaos execution.
RAMP_TIME Period to wait before and after injecting chaos (in seconds). For example, 30 s. For more information, go to ramp time.

Detach volumes by ID

Comma-separated list of volume IDs subject to EBS detach. Tune it by using the EBS_VOLUME_ID environment variable.

The following YAML snippet illustrates the use of this environment variable:

# contains EBS volume ID 
kind: ChaosEngine
name: engine-nginx
engineState: "active"
chaosServiceAccount: litmus-admin
- name: ebs-loss-by-id
# ID of the EBS volume
value: 'ebs-vol-1'
# region for the EBS volume
- name: REGION
value: 'us-east-1'
VALUE: '60'