CODEWITHSUNDEEP
amazon-web-servicesamazon-ec2amazon-elastic-beanstalk
Paul Taylor
Paul Taylor

Reputation: 13160

AWS:Device Name Error when converting from Elastic Beanstalk instance from m3.xlarge to m4.xlarge

I have an Elastic Beanstalk application using an m3.xlarge EC2 instance.

I wanted to try out using m4.xlarge instead so I cloned my EB instance. Then once it was running I clicked on Change Configuration and changed the Instance Type to m4.xlarge but then this gives the following error

Invalid root device name: '/dev/sda1', expecting: '/dev/xvda'.

Why is this error occurring ?

I have found this article

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/device_naming.html

which gives some background information but I still dont know what to about this error.

Upvotes: 3

Views: 271

Answers (1)

Paul Taylor
Paul Taylor

Reputation: 13160

Turns out the problem was an ebextension script, did not realize they were checked at that stage, but I had configured a larger root disk, and in there it referred to /dev/sda1

Resources:
    AWSEBAutoScalingLaunchConfiguration:
        Type: AWS::AutoScaling::LaunchConfiguration
        Properties:
            BlockDeviceMappings:
               - DeviceName: /dev/sda1
                 Ebs:
                     VolumeSize:
                        35

changing it accordingly fixed the issue:

Resources:
    AWSEBAutoScalingLaunchConfiguration:
        Type: AWS::AutoScaling::LaunchConfiguration
        Properties:
            BlockDeviceMappings:
               - DeviceName: /dev/xvda
                 Ebs:
                     VolumeSize:
                        35

Upvotes: 3

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