Showing all posts by Jussi Heinonen
October 25, 2012 | DevOps
A common issue with Puppet manifests is a clash of resource definitions that appears in the Puppet log file as: ‘Duplicate definition: File[resource-name] is already defined; cannot redefine at…’
This issue is likely to occur when building a service stack from reusable Puppet modules and you try to alter a resource that has already been defined in modules that the service depends on.
Building a service from reusable Puppet modules has a couple of benefits. It saves you time when you don’t have to write new modules every time you build a new service. It also improves the quality when you build your service from modules that are trusted, tried and tested.
August 16, 2012 | Neo4j
It’s been more than a year now since I rolled out Neo4j Graph Database Server image in Amazon EC2.
In May 2011 the version of Neo4j was 1.3 and just recently guys at Neo Technology published version 1.7.2 so I thought now is the time to revisit this exercise and make fresh AMIs available.
Last year I created Neo4j AMI manually in one region then copied it across to the remaining AWS regions. Due to the size of the AMI and the latency between regions this process was slow.
