experiment_run_SSM_cpuburn.json

{
    "version": "1.0.0",
    "title": "Running a CPU burn on EC2 instances using SSM Run Command",
    "description": "Running a CPU burn on EC2 instances using SSM Run Command",
    "tags": ["cpu"],
    "configuration": {
        "endpoint_url": {
            "type": "env",
            "key": "ENDPOINT_URL"
        },
        "instance_id": {
            "type": "env",
            "key": "INSTANCE_ID"
        },
        "duration": "30",
        "cpu": "0"
    },
    "contributions": {  
        "reliability": "medium",
        "security": "none",
        "scalability": "medium"
    },
    "steady-state-hypothesis": {
        "title": "Application responds within 6 seconds",
        "probes": [
            {
                "name": "http-response-time",
                "type": "probe",
                "provider": {
                    "type": "python",
                    "module": "chaoscloud.probes.http",
                    "func": "time_http_call",
                    "arguments": {
                        "url": "${endpoint_url}"
                    }
                },
                "tolerance": {
                    "name": "http-response-time-under",
                    "type": "probe",
                    "provider": {
                        "type": "python",
                        "module": "chaoscloud.tolerances.http",
                        "func": "response_time_under",
                        "arguments": {
                            "duration": 6000
                        }
                    }
                }
            }
        ]
    },
    "method": [
        {
            "type": "action",
            "name": "inject-cpu",
            "provider": {
                "type": "process",
                "path": "aws",
                "arguments": "ssm send-command --document-name \"cpu-stress\" --document-version \"1\" --targets '[{\"Key\":\"InstanceIds\",\"Values\":[\"${instance_id}\"]}]' --parameters '{\"duration\":[\"${duration}\"],\"cpu\":[\"${cpu}\"]}' --timeout-seconds 60 --max-concurrency \"50\" --max-errors \"0\"  --output-s3-bucket-name \"adhorn-chaos-ssm-output\" --cloud-watch-output-config '{\"CloudWatchOutputEnabled\":true}' --region eu-west-1 --query 'Command.CommandId' --output text > CommandId.info"
            }
        }
    ],
    "rollbacks": [
        {
            "type": "action",
            "name": "Stop SSM run command",
            "provider": {
                "type": "process",
                "path": "aws",
                "arguments": "ssm cancel-command --command-id $(cat CommandId.info) "
            },
            "pauses": {
                "after": 30
            }
        }
    ]
}