samples/cartridge-groups/tomcat-group.json

{
    "name": "tomcat-group",
    "groups": [
        {
            "name": "tomcat-group",
            "cartridges": [
                "tomcat1",
                "tomcat2"
            ]
        }
    ],
    "dependencies": {
        "terminationBehaviour": "terminate-all"
    }
}