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Ma question concerne la réalisation d'attendre cfn-signal avant d'ajouter un EC2 de démarrage à l'ELB (si possible, en utilisant cloudformation). Pour l'instant, l'ELB commence à utiliser l'instance sans attendre qu'il soit prêt, pire, si je démarre le service apache seulement à la fin du "boot", il n'attend pas la période de grâce et supprime l'instance avant a fini d'être initialisé.comment attendre le signal cfn avant d'ajouter un EC2 de démarrage à l'ELB
ici est mon AutoScalingGroup conf:
"webServerASG": {
"Type": "AWS::AutoScaling::AutoScalingGroup",
"CreationPolicy": {
"ResourceSignal": {
"Timeout": "PT10M",
"Count": { "Ref": "WebServerDesiredCapacity" }
}
},
"UpdatePolicy" : {
"AutoScalingReplacingUpdate" : {
"WillReplace" : true
},
"AutoScalingRollingUpdate" : {
"MaxBatchSize" : 1,
"MinInstancesInService" : 1,
"MinSuccessfulInstancesPercent" : 75,
"SuspendProcesses" : [ "AlarmNotification", "ScheduledActions", "AZRebalance", "ReplaceUnhealthy", "HealthCheck", "Launch" ],
"WaitOnResourceSignals": true,
"PauseTime" : "PT10M"
}
},
"Properties": {
"AvailabilityZones": [...],
"Cooldown": "60",
"HealthCheckGracePeriod": "560",
"HealthCheckType": "ELB",
"MaxSize": { "Ref": "WebServerMaxCapacity" },
"MinSize": "1",
"DesiredCapacity": { "Ref": "WebServerDesiredCapacity" },
"VPCZoneIdentifier": [...],
"NotificationConfigurations": [...],
"LaunchConfigurationName": { "Ref": "webServer01LC" },
"LoadBalancerNames": [ { "Ref": "webServerLoadBalancerELB" } ],
"MetricsCollection": [...],
"TerminationPolicies": [
"Default"
]
}
},
avec cette conf pour le LoadBalancer:
"webServerLoadBalancerELB": {
"Type": "AWS::ElasticLoadBalancing::LoadBalancer",
"Properties": {
"Subnets": [...],
"HealthCheck": {
"HealthyThreshold": "10",
"Interval": "30",
"Target": "HTTP:80/aws/healthcheck.php",
"Timeout": "5",
"UnhealthyThreshold": "2"
},
"ConnectionDrainingPolicy": {
"Enabled": "true",
"Timeout": "300"
},
"ConnectionSettings": {
"IdleTimeout": "60"
},
"CrossZone": "true",
"SecurityGroups": [...],
"Listeners": [
{
"LoadBalancerPort": "80",
"Protocol": "HTTP",
"InstancePort": "80",
"InstanceProtocol": "HTTP"
}
]
}
}
et pour la LaunchConfiguration:
"webServer01LC": {
"Type": "AWS::AutoScaling::LaunchConfiguration",
"Properties": {
"AssociatePublicIpAddress": false,
"ImageId": {...},
"InstanceType": "t2.small",
"KeyName": {...},
"IamInstanceProfile": "EC2WebServerRole",
"SecurityGroups": [...],
"BlockDeviceMappings": [...],
"UserData" : { "Fn::Base64" : { "Fn::Join" : ["", [
"#!/bin/bash\n",
"echo '\n### pip install cloud-init : ' | tee --append /var/log//userData.log \n",
"pip install https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz 2>> /var/log//userData.log\n",
"ln -s /usr/local/init/ubuntu/cfn-hup /etc/init.d/cfn-hup >> /var/log//userData.log>&1\n",
"echo '\n### execute the AWS::CloudFormation::Init defined in the Metadata' | tee --append /var/log//userData.log \n",
"cfn-init -v",
" --region ", { "Ref" : "AWS::Region" },
" --stack ", { "Ref" : "AWS::StackName" },
" --resource lciTophubWebServer01LC ",
" \n",
"cfn-signal --exit-code $? --region ", { "Ref" : "AWS::Region" }, " --stack ", { "Ref" : "AWS::StackName" }, " --resource asgiTophubWebServerASG \n",
"echo '\n### end of the script!' | tee --append /var/log//userData.log \n"
]]}}
},
"Metadata": {...}
}