capuchin

Capuchin

Small and simple Chaos Monkey for AWS inspired by Netflix Simian Army

• Can terminate tagged EC2 instances in autoscaling groups
• Can stop tagged EC2 instances
• Can restore stopped EC2 instances
• Sends logs to Cloudwatch Logs Streams (capuchin-log-group -> capuchin-log-stream), creates it if needed

install

You have to install one dependency:

go get -u github.com/aws/aws-sdk-go

Configuration

Example configuration file with specified tags:

{
    "Restore": {
        "Instances": {
            "Environment": "INT",
            "StoppedByCapuchin": "true"
        },
        "Tag": "StoppedByCapuchin"
    },
    "Terminate": {
        "Instances": {
            "Environment": "UAT",
            "Capuchin": "eligible-to-destroy"
        },
        "Autoscaling": {
            "Environment": "UAT",
            "Capuchin": "eligible-to-destroy"
        },
        "Tag": "TerminatedByCapuchin"
    },
    "Stop": {
        "Instances": {
            "Environment": "INT",
            "Capuchin": "eligible-to-stop"
        },
        "Tag": "StoppedByCapuchin"
    }
}

Using those settings Capuchin will:

• Find all the instances with tags: Environment = INT AND StoppedByCapuchin = true and start them removing tag StoppedByCapuchin
• Pick one of autoscaling groups with tags: Environment = UAT AND Capuchin = eligible-to-destroy, pick one of its instances there with tags: Environment = UAT AND Capuchin = eligible-to-destroy and TERMINATE it tagging it with TerminatedByCapuchin = true
• Pick one of instances with tags: Environment = INT AND Capuchin = eligible-to-stop and STOP IT tagging it with StoppedByCapuchin = true

License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.