multi.json

{{/*
    
    Infrakit Groups Config
    
    This is a template JSON for managing two groups of instances - managers and workers - on AWS.
    To keep things simple, we use the metadata api on AWS to determine subnets and vpc ids.
    
    This is to support the use case where infrakit is running *inside* the cloud environment where
    the instances it manages reside.
    
     */}}
    
    {{ source "common.ikt" }} {{/* a common template included here to define global variables */}}
    
    {{/* Local variables */}}
    {{ $swarmLeaderIP := var `/cluster/swarm/join/ip` }}
    {{ $managerIPs := var `/cluster/swarm/manager/ips` }}
    
    {{ $workerSize := sub (var `/cluster/size`) (len $managerIPs) }}
    {{ $dockerEngine := `unix:///var/run/docker.sock` }} {{/* for this flavor to connect to */}}
    
    {{ $managerInit := cat (var `/infrakit/config/root`) `/manager-init.sh` | nospace }}
    {{ $workerInit := cat (var `/infrakit/config/root`) `/worker-init.sh` | nospace }}
    
    {{ $myGroups := include (cat (var `/cluster/provider`) `/groups.json` | nospace) | jsonDecode }}
    
    [
        {
            "Plugin": "group",
            "Properties": {
                "ID": "managers",
                "Properties": {
                    "Allocation": {
                        "LogicalIDs": {{ $managerIPs | jsonEncode }}
                    },
                    "Flavor": {
                        "Plugin": "swarm/manager",
                        "Properties": {
                            "Attachments" : {
                                "{{index $managerIPs 0}}" : [
                                    { "ID":"{{index $managerIPs 0}}", "Type":"ebs" }
                                ],
                                "{{index $managerIPs 1}}" : [
                                    { "ID":"{{index $managerIPs 1}}", "Type":"ebs" }
                                ],
                                "{{index $managerIPs 2}}" : [
                                    { "ID":"{{index $managerIPs 2}}", "Type":"ebs" }
                                ]
                            },
                            "InitScriptTemplateURL": "{{ $managerInit }}",
                            "SwarmJoinIP": "{{ $swarmLeaderIP }}",
                            "Docker" : {
                                "Host" : "{{ $dockerEngine }}"
                            }
                        }
                    },
                    "Instance": {{ $myGroups.Managers | jsonEncode }}
                }
            }
        }
        ,
        {
            "Plugin": "group",
            "Properties": {
                "ID": "workers",
                "Properties": {
                    "Allocation": {
                        "Size": {{ $workerSize }}
                    },
                    "Flavor": {
                        "Plugin": "swarm/worker",
                        "Properties": {
                            "InitScriptTemplateURL": "{{ $workerInit }}",
                            "SwarmJoinIP": "{{ $swarmLeaderIP }}",
                            "Docker" : {
                                "Host" : "{{ $dockerEngine }}"
                            }
                        }
                    },
                    "Instance": {
                        "Plugin": "selector/tiered",
                        "Properties": {
                            "aws/ec2-instance": {
                                "region": "eu-central-1a",
                                "type": "t2.micro"
                            },
                            "gcp/compute": {
                                "MachineType": "n1-standard-1",
                                "Disks":[{
                                    "Boot": true,
                                    "SizeGb": 60,
                                    "Image": "https://www.googleapis.com/compute/v1/projects/ubuntu-os-cloud/global/images/ubuntu-1404-trusty-v20161205",
                                    "Type": "pd-standard",
                                    "AutoDelete": false,
                                    "ReuseExisting": true
                                }],
                                "Scopes": [
                                  "https://www.googleapis.com/auth/cloudruntimeconfig",
                                  "https://www.googleapis.com/auth/logging.write"
                                ]
                            }
                        }
                    }
                }
            }
        }
    ]