aws create a machine with mounted volume

Question

I am using aws ec2 with ubuntu machine I would like to create a volume, and every time I create a machine I need it to be attached and mounted to the machine.

Note, this is a single existing volume, and will be mounted to one machine at a time only. I need to start a spot instance and attach and mount that volume every time is an automated way

The way I found so far, I creating the machine using aws-cli, then attaching the volume using the cli, I can't find a way to mount the volume to the machine (I don't want to use ssh to the machine) I thought about using aws run command, to try and do so, but can't find mount command there. Is there any programatic way to do so, via the cli of some other tool?

Udara Jayawardana · Answer 1 · 2019-03-06T03:53:54.983

You can write a CloudFormation script for this. It's an Infrastructure-as-a-code tool which will enable you to create most of the AWS resource in a simple yml file.

For mounting the disks, you can attach it and then mount it to your desired directory via the user data section.

I'll add a sample code below for you.

Resources:
  server1:
    Type: 'AWS::EC2::Instance'
    Properties:
      DisableApiTermination: 'true'
      AvailabilityZone: us-east-1c
      ImageId:
        Ref: AMI
      InstanceType:
        Ref: InstanceType
      KeyName:
        Ref: KeyName
      SecurityGroupIds:
        - Ref: WebSG
      IamInstanceProfile:
        Ref: InstanceProfile
      SubnetId:
        Ref: SubnetId
      BlockDeviceMappings:
        - DeviceName: /dev/sda1
          Ebs:
            VolumeSize:
              Ref: RootVolumeSize
            VolumeType: gp2
        - DeviceName: /dev/sde
          Ebs:
            VolumeSize:
              Ref: AppVolumeSize
            VolumeType: gp2
      UserData:
        'Fn::Base64': !Sub |-
          #!/bin/bash -v
          yum update -y aws-cfn-bootstrap
          exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1
          date > /home/ec2-user/starttime

          #Partition new disks
          echo -e "o\nn\np\n1\n\n\nw" |fdisk /dev/xvde

          #Make Folders to mount new disks
          mkdir /APP

          #Format disks
          mkfs.ext3 /dev/xvde1

          #Mount New Disks
          mount /dev/xvde1 /APP

          #Add mounts to FSTab so it will stick in reboot
          echo "/dev/xvde1 /APP ext3 defaults 0 2" >> /etc/fstab

          date > /home/ec2-user/stoptime
          echo END

To mount an existing volume, define the volume ID in the parameters, for example as 'AppVolume', and mount it to the instance with below code block

MountPoint:
  Type: AWS::EC2::VolumeAttachment
  Properties:
    InstanceId: !Ref 'Ec2Instance'
    VolumeId: !Ref 'AppVolume'
    Device: /dev/sdh

You can read more on this in AWS documentation

It's set of simple bash commands. First 3 lines is to log data. `#Partition new disks` is to configure the EBS volume mounted. `#Make Folders to mount new disks` to create the mount point directory, `#Format disks` to format the partition created in fdisk and finally the last two to mount and add the entry to the fstab — Udara Jayawardana, Mar 04 '19 at 06:17
could you please post a working example? the issue i see here is that i can not use the user data to mount the volumes because they are not yet attached when I create the machine. — thebeancounter, Mar 04 '19 at 09:36
the whey I see it, this answer is creating a new volume, i need to mount an existing one — thebeancounter, Mar 04 '19 at 09:43
just a regular ebs volume, I would like to use it to create data persistence with spot instances — thebeancounter, Mar 05 '19 at 07:19
That makes things even easier. I'll update the answer with the code — Udara Jayawardana, Mar 06 '19 at 03:49
The answer still does not ezplain how to use the ebs as the root volume... — thebeancounter, Mar 09 '19 at 16:34

aws create a machine with mounted volume

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