J'essaie de créer un équilibreur de charge d'application dans CloudFormation, avec un groupe cible qui transfère le trafic vers les instances EC2. Voici l'extrait pertinent, où ELBSubnets, ECSCluster, taskdefinition et VpcId sont passés en tant que paramètres:
"EcsElasticLoadBalancer" : {
"Type" : "AWS::ElasticLoadBalancingV2::LoadBalancer",
"Properties" : {
"Subnets" : { "Ref" : "ELBSubnets" },
"SecurityGroups": [
{ "Ref": "ELBAccessSecurityGroup" }
]
}
},
"LoadBalancerListener": {
"Type": "AWS::ElasticLoadBalancingV2::Listener",
"Properties": {
"DefaultActions": [{
"Type": "forward",
"TargetGroupArn": { "Ref": "TargetGroup" }
}],
"LoadBalancerArn": { "Ref": "EcsElasticLoadBalancer" },
"Port": 80,
"Protocol": "HTTP"
}
},
"TargetGroup": {
"Type": "AWS::ElasticLoadBalancingV2::TargetGroup",
"Properties": {
"Name": { "Fn::Join": [ "-", [ { "Ref": "AWS::StackName" }, "TargetGroup" ] ] },
"Port": 80,
"Protocol": "HTTP",
"VpcId": { "Ref": "VpcId" }
},
"DependsOn": [ "EcsElasticLoadBalancer" ]
},
"service": {
"Type": "AWS::ECS::Service",
"Properties" : {
"Cluster": { "Ref": "ECSCluster" },
"DesiredCount": "1",
"LoadBalancers": [
{
"ContainerName": "main-app",
"ContainerPort": 3000,
"TargetGroupArn": { "Ref": "TargetGroup" }
}
],
"Role" : {"Ref":"ECSServiceRole"},
"TaskDefinition" : {"Ref":"taskdefinition"}
}
},
"ECSServiceRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"ecs.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/",
"Policies": [
{
"PolicyName": "ecs-service",
"PolicyDocument": {
"Statement": [
{
"Effect": "Allow",
"Action": [
"elasticloadbalancing:Describe*",
"elasticloadbalancing:DeregisterInstancesFromLoadBalancer",
"elasticloadbalancing:RegisterInstancesWithLoadBalancer",
"ec2:Describe*",
"ec2:AuthorizeSecurityGroupIngress"
],
"Resource": "*"
}
]
}
}
]
}
}
J'obtiens l'erreur suivante lors de la création du service:
Le groupe cible avec targetGroupArn arn: aws: elasticloadbalancing: us-east-1: xxxxxxxx: targetgroup/AlbServiceStack-TargetGroup/6ba9c037c26cdb36 n'a pas d'équilibreur de charge associé.
Qu'est-ce que je rate? Dans la documentation, il ne semble pas y avoir de moyen de spécifier un équilibreur de charge pour le groupe cible.
Je l'ai fait fonctionner - le problème était double:
"elasticloadbalancing:DeregisterTargets"
"elasticloadbalancing:RegisterTargets"
"DependsOn": [ "LoadBalancerListener" ]
comme attribut supplémentaire.Le modèle mis à jour ressemble à ceci:
"EcsElasticLoadBalancer" : {
"Type" : "AWS::ElasticLoadBalancingV2::LoadBalancer",
"Properties" : {
"Subnets" : { "Ref" : "ELBSubnets" },
"SecurityGroups": [
{ "Ref": "ELBAccessSecurityGroup" }
]
}
},
"LoadBalancerListener": {
"Type": "AWS::ElasticLoadBalancingV2::Listener",
"Properties": {
"DefaultActions": [{
"Type": "forward",
"TargetGroupArn": { "Ref": "TargetGroup" }
}],
"LoadBalancerArn": { "Ref": "EcsElasticLoadBalancer" },
"Port": 80,
"Protocol": "HTTP"
}
},
"TargetGroup": {
"Type": "AWS::ElasticLoadBalancingV2::TargetGroup",
"Properties": {
"Name": { "Fn::Join": [ "-", [ { "Ref": "AWS::StackName" }, "TargetGroup" ] ] },
"Port": 80,
"Protocol": "HTTP",
"VpcId": { "Ref": "VpcId" }
},
"DependsOn": [ "EcsElasticLoadBalancer" ]
},
"service": {
"Type": "AWS::ECS::Service",
"DependsOn": [ "LoadBalancerListener" ],
"Properties" : {
"Cluster": { "Ref": "ECSCluster" },
"DesiredCount": "1",
"LoadBalancers": [
{
"ContainerName": "main-app",
"ContainerPort": 3000,
"TargetGroupArn": { "Ref": "TargetGroup" }
}
],
"Role" : {"Ref":"ECSServiceRole"},
"TaskDefinition" : {"Ref":"taskdefinition"}
}
},
"ECSServiceRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": [
"ecs.amazonaws.com"
]
},
"Action": [
"sts:AssumeRole"
]
}
]
},
"Path": "/",
"Policies": [
{
"PolicyName": "ecs-service",
"PolicyDocument": {
"Statement": [
{
"Effect": "Allow",
"Action": [
"elasticloadbalancing:Describe*",
"elasticloadbalancing:DeregisterInstancesFromLoadBalancer",
"elasticloadbalancing:RegisterInstancesWithLoadBalancer",
"ec2:Describe*",
"ec2:AuthorizeSecurityGroupIngress",
"elasticloadbalancing:DeregisterTargets",
"elasticloadbalancing:RegisterTargets"
],
"Resource": "*"
}
]
}
}
]
}
}