如何识别terraform创建的aws ebs block卷名称和实际设备名称（rhel）之间的映射？

Question

I have attached the below ebs volumes in my aws ec2 instance

resource "aws_volume_attachment" "dbdata-vol-atch" {
    device_name = "/dev/sdc"
     id          = "xxxx"
    instance_id = "yyyy"
    volume_id   = "zzzz"
}

# module.mongo-vm-instances.aws_volume_attachment.dblog-vol-atch["MongoA"]:
resource "aws_volume_attachment" "dblog-vol-atch" {
    device_name = "/dev/sdd"
     id          = "xxxx"
    instance_id = "yyyy"
    volume_id   = "zzzz"
}

# module.mongo-vm-instances.aws_volume_attachment.dbwsp-vol-atch["MongoA"]:
resource "aws_volume_attachment" "dbwsp-vol-atch" {
    device_name = "/dev/sde"
    id          = "xxxx"
    instance_id = "yyyy"
    volume_id   = "zzzz"
}

But if i check in instance i'm seeing as below and not able to see the device name which i have mentioned in terraform(/dev/sd*)

[ec2-user@MongoA ~]$ lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
nvme1n1     259:0    0   30G  0 disk
nvme0n1     259:1    0   10G  0 disk
├─nvme0n1p1 259:2    0    1M  0 part
└─nvme0n1p2 259:3    0   10G  0 part /
nvme2n1     259:4    0   50G  0 disk
nvme3n1     259:5    0   30G  0 disk
nvme4n1     259:6    0  500G  0 disk
nvme5n1     259:7    0   30G  0 disk

Tried below but no luck to see the device name

[ec2-user@MongoM-1 ~]$ sudo nvme list
Node             SN                   Model                                    Namespace Usage                      Format           FW Rev
---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
/dev/nvme0n1     volxxxxxxxxxxxxx Amazon Elastic Block Store               1           0.00   B /  10.74  GB    512   B +  0 B   1.0 
/dev/nvme1n1     volxxxxxxxxxxxxx Amazon Elastic Block Store               1           0.00   B /  32.21  GB    512   B +  0 B   1.0 
/dev/nvme2n1     volxxxxxxxxxxxxx Amazon Elastic Block Store               1           0.00   B /  53.69  GB    512   B +  0 B   1.0 
/dev/nvme3n1     volxxxxxxxxxxxxx Amazon Elastic Block Store               1           0.00   B /  32.21  GB    512   B +  0 B   1.0 
/dev/nvme4n1     volxxxxxxxxxxxxx Amazon Elastic Block Store               1           0.00   B / 536.87  GB    512   B +  0 B   1.0 
/dev/nvme5n1     volxxxxxxxxxxxxx Amazon Elastic Block Store               1           0.00   B /  32.21  GB    512   B +  0 B   1.0 

Could you please advice.Since using that dev name,i have to create a shell script to run mount command for respective device name to respective directory(mount /dev/sdb /data/...etc)

Answer 1

You can use ebsnvme-id as shown in the docs :

[ec2-user ~]$ sudo /sbin/ebsnvme-id /dev/nvme1n1
Volume ID: vol-01324f611e2463981
/dev/sdf

Answer 2

Looks similar to the SO question: AWS Terraform automation of multiple nvme<x>

Also, you can create a symbolic link for NVMe devices to /dev/* devices using cloud-init, example: https://github.com/leboncoin/terraform-aws-nvme-example/blob/master/scripts/ebs_alias.sh.tpl

Answer 3

lsblk,nvme helped me to get the mapping device names.Got the results by writing a small for loop as below

for i in $(lsblk|awk '{print $1}'|grep -v p|grep -i  -v name) ; do
ALIAS=$(nvme id-ctrl -v /dev/$i| grep -Po '/dev/(sd[b-z]|xvd[b-z])');
mkfs -t xfs /dev/$i
vol_id=$(blkid -s UUID -o value /dev/$i)
echo $i $ALIAS $vol_id>>/tmp/mnt.log
done

Note: Need to install nvme-cli by using yum -y install nvme-cli to use nvme command

Answer 4

Check if you have the NVMe drivers installed:

To confirm that your instance has the NVMe driver

You can confirm that your instance has the NVMe driver and check the driver version using the following command. If the instance has the NVMe driver, the command returns information about the driver.

$ modinfo nvme

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/nvme-ebs-volumes.html#install-nvme-driver .