Running task with "ubuntu" user

Nomad
1

I’m trying to run a task using exec and as user ubuntu but I’m seeing that the ubuntu user home directory doesn’t seem to exist.

Something like this:

config {
        command = "/bin/bash"
        args = ["-c", <<EOT
          whoami
          ls -l /home/ubuntu
        EOT
        ]
      }

Will output “ubuntu”, but “cannot access ‘/home/ubuntu’: No such file or directory”.

I’ve just started using Nomad, so I’m sure I’m missing quite a bit, but any help would be greatly appreciated.

2

Hi. Exec mounts or copies(!) only directories listed in the chroot_env config. Kindly read Drivers: Exec | Nomad | HashiCorp Developer .

There is also exec2 driver and raw_exec driver that you might be interested.

3

There is also exec2 driver

Just to follow up, the exec2 driver might be a good fit since it is oriented around making use of the host file system. You’d specify the unveil paths to include the home directory, e.g.

config {
    command = "..."
    unveil = ["rw:/home/ubuntu"]
}

Depending on your system configuration it may be substantially more efficient than creating a copy in a chroot like with the original exec driver.

4

Thanks Seth, this is also very helpful