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    <p>You workaround is a reasonable one (and shows that you seem to be in control of your AWS operations already).</p> <p>You could improve on your custom solution eventually by means of the dedicated <a href="http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cfn-customresource.html" rel="nofollow">CustomResource</a> type, which are <em>special AWS CloudFormation resources that provide a way for a template developer to include resources in an AWS CloudFormation stack that are provided by a source other than Amazon Web Services.</em> - the <a href="http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/crpg-walkthrough.html" rel="nofollow">AWS CloudFormation Custom Resource Walkthrough</a> provides a good overview of what this is all about, how it works and what's required to implement your own.</p> <p>The benefit of using this facade for a custom resource (i.e. the <a href="http://aws.amazon.com/elasticache/" rel="nofollow">Amazon ElastiCache</a> cluster in your case) is that its entire lifecycle (create/update/delete) can be handled in a similar and controlled fashion just like any officially supported CloudFormation resource types, e.g. resource creation failures would be handled transparently from the perspective of the entire stack.</p> <p>However, for the use case at hand you might actually just want to wait for official support becoming available:</p> <p><ul> <li>AWS has announced VPC support for ElastiCache in the context of the recent major <a href="http://aws.typepad.com/aws/2013/03/amazon-ec2-update-virtual-private-clouds-for-everyone.html" rel="nofollow">Amazon EC2 Update - Virtual Private Clouds for Everyone!</a>, which boils down to <em>Default VPCs for (Almost) Everyone</em>.<br></p> <blockquote> <p>We want every EC2 user to be able to benefit from the advanced networking and other features of Amazon VPC that I outlined above. To enable this, starting soon, instances for new AWS customers (and existing customers launching in new Regions) will be launched into the "EC2-VPC" platform. [...]</p> <p>You don’t need to create a VPC beforehand - simply launch EC2 instances or provision Elastic Load Balancers, RDS databases, <strong>or ElastiCache clusters</strong> like you would in EC2-Classic and we’ll create a VPC for you at no extra charge. We’ll launch your resources into that VPC [...] <em>[emphasis mine]</em></li> <li>This update sort of implies that any new services will likely be also available in VPC right away going forward (else the new <em>EC2-VPC</em> platform wouldn't work automatically for new customers as envisioned).</li> </ul> Accordingly I'd expect the CloudFormation team to follow suit and complete/amend their support for deployment to VPC going forward as well.</p> </blockquote>
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    1. USSteffen Opel
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    1. COAs you mention I still need to solve how to delete cache clusters when stack is deleted. This may be a reason for using CustomResource. Will take a look.
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      1. USLuciano Afranllie
    2. COCustom Resource is working nicely for me for this. Much better than the CloudFormation notifications.
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      1. USrstaveley
 

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