cfn-template.json

{
	"AWSTemplateFormatVersion" : "2010-09-09",
	"Description" : "Description of what this template contains. i.e. which service it runs",
	"Parameters" : {
		"MYCONTAINERVAR1" : {
			"Description" : "Application Environment Variable 1",
			"Type" : "String",
			"Default" : ""
		},
		"MYCONTAINERVAR2" : {
			"Description" : "Application Environment Variable 2",
			"Type": "String",
			"Default": ""
		}, 
		"MYCONTAINERVAR3" : {
			"Description" : "Application Environment Variable 3",
			"Type" : "String",
			"Default" : ""
		}, 
		"HOSTPORT" : {
			"Description" : "Host port",
			"Type" : "String",
			"Default" : ""
		}, 
		"CLUSTERNAME" : {
			"Description" : "The name of the cluster to use",
			"Type" : "String",
			"Default" : ""
		}, 
		"IMAGENAME" : {
			"Description" : "The name of the dockerhub image. i.e. example/service:tag",
			"Type" : "String",
			"Default" : ""
		}, 
		"CONTAINERNAME" : {
			"Description" : "The name of the docker container",
			"Type" : "String",
			"Default" : ""
		},
		"DNSPREFIX" : {
			"Description" : "(Optional) [DNS Record] Prefix for the ELB DNS Record",
			"Type" : "String",
			"Default" : ""
		},
		"DNSZONE" : {
			"Description" : "(Optional) [DNS Record] Route53-hosted zone to use for the ELB's DNS record (<prefix>.<zone>)",
			"Type" : "String",
			"Default" : ""
		},
		"TASKDESIREDCOUNT" : {
			"Description" : "[Task] Desired number of running tasks",
			"Type" : "String",
			"Default" : ""
		},
		"LOADBALANCERSUBNETS" : {
			"Description" : "(Required) [Load Balancer] List of subnets",
			"Type" : "List<AWS::EC2::Subnet::Id>"
		},
		"SERVICEROLE" : {
			"Description" : "[Service] Name of the role",
			"Type" : "String"
		},
		"LOADBALANCERSECURITYGROUP" : {
			"Description" : "(Required) [Load Balancer] The security group of the load balancer",
			"Type" : "AWS::EC2::SecurityGroup::Id"
		},
		"CONTAINERPORT" : {
			"Description" : "[Service] The port on the container",
			"Type" : "String",
			"Default" : ""
		},
		"LBSSLCERT" : {
			"Description" : "[Load Balancer] SSL Certificate ARN",
			"Type" : "String"
		},
		"REQUIREDCPU" : {
			"Description" : "[TaskDef] The required CPU usage based on a 1-1024 scale",
			"Type" : "String",
			"Default" : "10"
		},
		"REQUIREDMEMORY" : {
			"Description" : "[TaskDef] The requried memory needed in MB",
			"Type" : "String",
			"Default" : "100"
		}
	},

	"Conditions" : {
		"CreateDnsEntry" : { "Fn::And" : [
			{ "Fn::Not" : [{ "Fn::Equals" : [{ "Ref" : "DNSPREFIX" }, ""]}]},
			{ "Fn::Not" : [{ "Fn::Equals" : [{ "Ref" : "DNSZONE" }, ""]}]}
		]}
	},

	"Resources" : {
		"TaskName" : {
			"Type" : "AWS::ECS::TaskDefinition",
			"Properties" : {
				"ContainerDefinitions" : [
					{
						"Cpu" : { "Ref" : "REQUIREDCPU" },
						"Environment" : [{
								"Name": "VAR1",
								"Value" : { "Ref" : "MYCONTAINERVAR1" }
							},{
								"Name" : "VAR2",
								"Value" : { "Ref" : "MYCONTAINERVAR2" }
							},{
								"Name" : "VAR3",
								"Value" : { "Ref" : "MYCONTAINERVAR3" }
							}
						],
						"Essential" : true,
						"Image" : { "Ref" : "IMAGENAME" },
						"Memory" : { "Ref" : "REQUIREDMEMORY" },
						"Name" : { "Ref" : "CONTAINERNAME" },
						"PortMappings" : [
							{
								"ContainerPort" : { "Ref" : "CONTAINERPORT" },
								"HostPort" : {"Ref" : "HOSTPORT"}
							}
						]
					}
				],
				"Volumes" : []
			}
		},
		
		"ServiceName" : {
			"Type" : "AWS::ECS::Service",
			"Properties" : {
				"Cluster" : { "Ref" : "CLUSTERNAME" },
				"DesiredCount" : { "Ref" : "TASKDESIREDCOUNT" },
				"TaskDefinition" : { "Ref" : "TaskName" },
				"LoadBalancers" : [{
					"LoadBalancerName" : { "Ref" : "ServiceLoadBalancer" },
					"ContainerPort" : { "Ref" : "CONTAINERPORT" },
					"ContainerName" : { "Ref" : "CONTAINERNAME" }
				}],
				"Role" : { "Ref" : "SERVICEROLE" }
			}
		},
		"ServiceLoadBalancer" : {
			"Type" : "AWS::ElasticLoadBalancing::LoadBalancer",
			"Properties" : {
				"Subnets" : { "Ref" : "LOADBALANCERSUBNETS" },
				"HealthCheck" : {
					"Target" : { "Fn::Join" : [ "", [ "HTTP:", { "Ref" : "HOSTPORT" }, "/healthcheck" ]]},
					"HealthyThreshold" : "3",
					"UnhealthyThreshold" : "5",
					"Interval" : "30",
					"Timeout" : "10"
				},
				"SecurityGroups" : [
					{ "Ref" : "LOADBALANCERSECURITYGROUP" }
				],
				"Listeners" : [
				{
					"InstancePort" : { "Ref" : "HOSTPORT" },
					"LoadBalancerPort" : "443",
					"Protocol" : "HTTPS",
					"SSLCertificateId" : { "Ref" : "LBSSLCERT" }
				}]
			}
		},
		"DNSRecord" : {
			"Condition" : "CreateDnsEntry",
			"Type" : "AWS::Route53::RecordSet",
			"Properties" : {
				"AliasTarget" : {
					"HostedZoneId" : { "Fn::GetAtt" : [ "ServiceLoadBalancer", "CanonicalHostedZoneNameID" ] },
					"DNSName" : { "Fn::GetAtt" : [ "ServiceLoadBalancer", "CanonicalHostedZoneName" ] }
				},
				"HostedZoneName" : { "Fn::Join" : [ "", [ { "Ref" : "DNSZONE" }, "."]] },
				"Name" : { "Fn::Join" : [ "", [ {"Ref" : "DNSPREFIX" }, ".", { "Ref" : "DNSZONE" }, "." ]]},
				"Type" : "A"
			}
		}
	},
	"Outputs" : {
		"ServiceARN" : {
			"Description" : "The name of the created Service",
			"Value" : { "Ref" : "ServiceName"}
		}
	}
}