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Hello there i am trying to upgrade ec2 micro instance to small instance. I am going to upgrade it with this.

But i assigned elastic ip, lot of alarms, load balancer and mounted s3 on it. I knew that elastic ip will lost but i want to know what about others. Alarms, load balancer, mounts. Are they will be ok?

  • After upgrade my server responding 503 on browser. There is rails project running on apache2 with passenger. – Batbayar Sep 24 '14 at 7:28
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Be careful with your code.

I had once changed to a 32-bit instance and had problems. In my code I was typecasting the facebook ids to int. So in a 64-bit it was fine. But when I downgraded, this resulted in wrong FB ids.

In your case its an upgrade. So you shouldn't be facing this issue.

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No side effects as such. If you are in production, you can point your elastic ip to machine to display "maintenance messages" and re-associate the elastic the resized machine later.

Also be careful about your data on the machine, if you were using instance store, you may want to take a image of the your instance etc. Its much easier with EBS store backed instances. The steps mentioned are quite clear so just follow them carefully.

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