title: Ubuntu: Could not enable service cfn-hup
body: <p>I am using a custom Ubuntu AMI on CloudFormation template and I am getting an error which says <code>CREATE_FAILED   AWS::AutoScaling::AutoScalingGroup  WebServerGroup  Received 0 SUCCESS signal(s) out of 1. Unable to satisfy 100% MinSuccessfulInstancesPercent requirement</code>. I check the log files on created EC2 instance on <code>/var/log/cfn-init.log</code> and I saw <code>Could not enable service cfn-hup</code> on the log file. Below is the part of my template :</p>
  
  <pre><code>"WebServerGroup": {
    "Type": "AWS::AutoScaling::AutoScalingGroup",
    "Properties": {
      "AvailabilityZones": {
        "Ref": "AZs"
      },
      "VPCZoneIdentifier": {
        "Ref": "Subnets"
      },
      "LaunchConfigurationName": {
        "Ref": "LaunchConfig"
      },
      "MinSize": "1",
      "MaxSize": "10",
      "DesiredCapacity": {
        "Ref": "InstanceCount"
      },
      "TargetGroupARNs" : [{"Ref": "TargetGroup"}],
      "Tags": [{
        "Key": "opsworks_stack_id",
        "Value": {
          "Ref": "OpsWorksStackId"
        },
        "PropagateAtLaunch": "true"
      }]
    },
    "CreationPolicy": {
      "ResourceSignal": {
        "Timeout": "PT15M"
      }
    },
    "UpdatePolicy": {
      "AutoScalingRollingUpdate": {
        "MinInstancesInService": "1",
        "MaxBatchSize": "1",
        "WaitOnResourceSignals": "true",
        "PauseTime": "PT15M"
      }
    }
  },
  
  
  "LaunchConfig" : {
    "Type" : "AWS::AutoScaling::LaunchConfiguration",
    "Metadata" : {
      "Comment" : "Install a simple application",
      "AWS::CloudFormation::Init" : {
        "config" : {
  
          "files" : {
  
            "/etc/cfn/cfn-hup.conf" : {
              "content" : { "Fn::Join" : ["", [
                "[main]\n",
                  "stack=", { "Ref" : "AWS::StackId" }, "\n",
                  "region=", { "Ref" : "AWS::Region" }, "\n"
                ]]},
              "mode"    : "000400",
              "owner"   : "root",
              "group"   : "root"
            },
  
            "/etc/cfn/hooks.d/cfn-auto-reloader.conf" : {
              "content": { "Fn::Join" : ["", [
                "[cfn-auto-reloader-hook]\n",
                  "triggers=post.update\n",
                  "path=Resources.LaunchConfig.Metadata.AWS::CloudFormation::Init\n",
                  "action=/usr/local/bin/cfn-init -v ",
                  "         --stack ", { "Ref" : "AWS::StackName" },
                  "         --resource LaunchConfig ",
                  "         --region ", { "Ref" : "AWS::Region" }, "\n",
                  "runas=root\n"
                ]]}
            }
          },
  
          "services" : {
            "sysvinit" : {
              "cfn-hup" : { "enabled" : "true", "ensureRunning" : "true",
              "files" : ["/etc/cfn/cfn-hup.conf", "/etc/cfn/hooks.d/cfn-auto-reloader.conf"]}
              }
            }
          }
        }
      },
  
      "Properties" : {
        "AssociatePublicIpAddress" : "true",
        "ImageId" : { "Ref" : "AmiId" },
        "SecurityGroups" : [ { "Ref" : "LoadBalancerSecurityGroup" } ],
        "KeyName"        : { "Ref" : "KeyName" },
        "InstanceType" : { "Ref" : "InstanceType" },
        "IamInstanceProfile": {"Ref" :"RoleName"},
        "UserData"       : { "Fn::Base64" : { "Fn::Join" : ["", [
         "#!/bin/bash -xe\n",
         "easy_install https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz\n",
  
         "/usr/local/bin/cfn-init -v ",
         "         --stack ", { "Ref" : "AWS::StackName" },
         "         --resource LaunchConfig ",
         "         --region ", { "Ref" : "AWS::Region" }, "\n",
  
         "/usr/local/bin/cfn-signal -e $? ",
         "         --stack ", { "Ref" : "AWS::StackName" },
         "         --resource WebServerGroup ",
         "         --region ", { "Ref" : "AWS::Region" }, "\n",
  
         "sed -i'' -e 's/.*requiretty.*//' /etc/sudoers", "\n",
         "pip install --upgrade awscli", "\n",
  
         "INSTANCE_ID=$(aws opsworks register ",
         "         --use-instance-profile ",
         "         --infrastructure-class ec2 ",
         "         --region ", { "Ref" : "AWS::Region" },
         "         --stack-id ", { "Ref" : "OpsWorksStackId" },
         "         --override-hostname $(tr -cd 'a-z' &lt; /dev/urandom |head -c8) --local 2&gt;&amp;1 |grep -o 'Instance ID: .*' |cut -d' ' -f3)", "\n",
  
         "aws opsworks wait instance-registered ", 
         "         --region ", { "Ref" : "AWS::Region" },
         "         --instance-id $INSTANCE_ID", "\n",
  
         "aws opsworks assign-instance ",
         "         --region ", { "Ref" : "AWS::Region" },
         "         --instance-id $INSTANCE_ID ",
         "         --layer-ids ", { "Ref": "OpsWorksLayerId" }, "\n"
       ]]}}
      }
    }
  </code></pre>