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Re: [MirageOS-devel] Mirage OS 2.4 errors on install and mirage-skeleton build

On 29 April 2015 at 10:35, Thomas Gazagnaire <thomas@xxxxxxxxxxxxxx> wrote:
> Third, when I managed to get one of the network samples building, for
> example "ping", I couldn't get the unikernel running locally with a tun/tap
> device I created. Even though I use tapctl to create a tap0 device owned by
> my user account, just like the tutorial advises, when I go to execute the
> unikernel I still get this error:
> Fatal error: exception Failure("net_tap0")
> Raised at file "src/core/lwt.ml", line 788, characters 22-23
> Called from file "src/unix/lwt_main.ml", line 34, characters 8-18
> Called from file "main.ml", line 47, characters 2-28
> This is rather cryptic but might indicate that you need to run the command
> using sudo.

What does strace show here? It might be permissions but if you made
the device owned by your user account it shouldnt be. You may need to
make /dev/net/tun world read and write (which is safe to do).


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