Monthly Archives: June 2014
Delete ElasticBeanstalk bucket
If you can’t delete Elastic Beanstalk created bucket, first remove all files inside the bucket then remove de bucket policy.
Go to the bucket’s policy (bucket –> properties –> permissions –> edit bucket policy)
Save the change to the Bucket Policy.
Now right click on the bucket and press delete.
AWS t1.micro 100% CPU
Sometimes EC2 CloudWatch monitoring shows 100% CPU usage but when you ssh to your instance and try to see it with ‘top’ you can’t understand what is happening. Probably, Amazon is “borrowing” some of your CPU cycles to give to someone else who needs it – this is standard practice for a virtualised environment where physical server resources like RAM usage and CPU cycles are often hugely over-committed.
To check for CPU steal, run top and take a look for the %st value. If this value is anything other than zero, it means your VM’s CPU cycles are being “borrowed”.
Recovering a Lost Amazon EC2 SSH Key
In case you lose your Amazon EC2 SSH Key, and can’t login in your instance. This isn’t a big problem if your instance is EBS based and you use an Elastic IP.
1. Upload your new SSH Key, or use one made by AWS
2. Make an AMI of your instance
3. Launch a new machine from your AMI, select the new SSH Key
4. Log in your machine with default user (ubuntu, ec2-user, depends on your original AMI image)
5. Change the Elastic IP to the new machine
6. Turn of the old machine and terminate it.