[ReBlog Ippon] Machine Learning : faire du Machine Learning avec Spark et Cassandra

AWS ELB: Zero downtime or Blue Green or Canary deployments!

In this post (https://zoumana.wordpress.com/2014/06/16/zero-downtime-deploiement-sur-tomcat7/), i talked about the Zero Downtime deployment feature inside tomcat 7 and later.

To summary this was about deploying a newer version of the same app within the same tomcat container keeping the previous WAR serving the HTTP requests until the new version is successfully deployed to take over the next users’ requests.

Today the target is the same:  avoiding to take an application off-line during an upgrade for the happiness of end users 🙂 but through one of Amazon Web Services feature: Elastic Load Balancer!

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I was victim from AWS public AMI hidden backdoor :-)

Today i received an email from AWS telling me that one of the EC2 instance i’m running is doing DDoS against an other server (against port 80 through UDP)

Here are my suggestions to start investigating on this kind of issue: