Root volume size

[Pierre Freund]

Hello,

I would like to create an AMI of a database with data inside, for dev environments. I am using Terraform / Packer / Chef-solo.

The chef receipe download dumps from S3, and load it into the mongodb database.

I can't find how to tell Packer that my root volume device should be like 30Go, and not the default value 8Go.

The EBS-backed documentation shows how to add another disk with "launch_block_device_mappings", but I don't want to add a new one and make all the filesystems command.

If I try to modify xvda, Packer tells me that the volume is already in use.

I just want to set the root volume size, as it is possible natively in AWS.

How can I do ?

Thanks,

Pierre Freund

[Loren Gordon]

I do that with "launch_block_device_mappings". An example is below. The "device_name" for the root device will depend a bit on the underlying AMI, and whether it is PVM or HVM, but it should be the same as the Root Device Name associated with the AMI itself.

            "launch_block_device_mappings": [

                {

                    "device_name": "/dev/sda1",

                    "delete_on_termination": true,

                    "volume_size": 20,

                    "volume_type": "gp2"

                }

            ],

-Loren

[Pierre Freund]

Thanks very much.

I tried lot of combinations, I thought I tried this one, but obviously not :)

For debian 8 hvm, the right configuration is :

            "launch_block_device_mappings": [

                {

                    "device_name": "/dev/xvda",

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[ZillaYT]

This setting doesn't work for me, I still get the default 8G AWS AMI partition.

amazon-ebs: xvda    202:0    0    8G  0 disk

amazon-ebs: └─xvda1 202:1    0    8G  0 part /

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[Rickard von Essen]

How do your template look like? 

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[ZillaYT]

Like this (some info committed). I use AWS Ubuntu AMI ami-024a64a6685d05041 as my base AMI

{

 "variables" : {

   "aws_access_key" : "{{ env `AWS_ACCESS_KEY_ID` }}",

   "aws_secret_key" : "{{ env `AWS_SECRET_ACCESS_KEY` }}",

   "ssh_private_key" : "{{ env `SSH_PRIVATE_KEY` }}",

   "aws-ami-us-east-1" : "{{ env `AWS_BASE_AMI` }}"

 },

 "builders" : [

   {

      "type": "amazon-ebs",

      "ssh_username": "ubuntu",

   ....other info removed...

       "launch_block_device_mappings" : [

       {

          "device_name" : "/dev/xvda",

         "delete_on_termination" : true,

          "volume_size" : 50,

          "volume_type" : "gp2"

        },

        {

          "device_name" : "/dev/xvdb",

         "delete_on_termination" : true,

          "volume_size" : 500,

          "volume_type" : "gp2"

        }
     ],

     "provisioners" : [{...}[

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[ZillaYT]

Ah, this worked

       {

         "device_name" : "/dev/sda1",

        "delete_on_termination" : true,

         "volume_size" : 250,

         "volume_type" : "gp2"

       },