# [OmniOS-discuss] Tun/Tap device installed but not showing up on OmniOS

Andries Annema an3s.annema at gmail.com
Mon Oct 24 19:04:07 UTC 2016

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    Hello there, guys,

    THE PROBLEM IN SHORT or TL;DR:
    I have installed the tun/tap device within the global zone of a r151014
    machine, but the /dev/tun and /dev/tap devices don't show up. What am I
    missing here?

    THE PROBLEM IN MORE DETAIL:
    I'm trying to get OpenVPN up and running as a server from within a
    non-global zone. For this the TUN/TAP device driver is needed within the
    global zone and passed on to the non-global zone. Seems straight
    forward, and I actually did succeed on one system, but my main
    production server is playing tricks on me.

    As I'm not running just one OmniOS server anymore, it seemed obvious
    that I needed my own package repository and not build software from
    source on each production server.
    So, this is what I did - at first, all of it on a virtual OmniOS r151014
    machine:
    1. Set up a local IPS package repository within another NGZ,
    2. set up a build environment within even another NGZ,
    3. within the build environment, I downloaded the TUN/TAP source code
    from https://github.com/kaizawa/tuntap
    4. configure --prefix=/proto/install/path/, make, make install
    5. Created a manifest, specify package contents, etc etc, "pkglint" to
    verify before publishing,
    6. and published the package to my local repo.
    7. Then from the global zone on this VM, with "pkg set-publisher" I
    added this repo,
    8. and installed my brand new tuntap-package with "pkg install
    network/tuntap".
    9. to verify "ls -l /dev/tun /dev/tap" and indeed the devices showed up.
    And not just these links, but also the actual devices listed under
    "/devices/pseudo/clone at 0:[tun|tap]". Awesome! My very first built and
    published package!

    Now, to get more serious, I repeated all this on my actual production
    server. But there it goes funny at step 9: the devices don't show up.
    The files that are included within the IPS package however, are indeed
    installed. No error/warning during install whatsoever. Reinstalled the
    tuntap a few times. No effect. Rebooted the system and reinstalled.
    Still no effect.
    The system hadn't been updated in over a year (431 days uptime...), so I
    figured maybe I'm missing a package or something. I uninstalled the
    tuntap-device, updated the system, tried again: still no luck.
    Fiddling around with "modinfo" and "modload" didn't help either:
    "modinfo" doesn't show up a tun or tap device and "modload" is unable to
    load it.

    Then I tried step 7-9 on a second and quite similarly build OmniOS
    r151014 system, a system that is much younger and had all its packages
    up to date to begin with (not that I'm sure that the cause of the
    problem lies in there, but it usually is a good/better starting point)
    and guess what? Two beautiful new devices are listed at /dev/tun and
    /dev/tap.
    Here, also "modinfo" shows nicely a tun and a tap device.

    So my questions are:
    A. Where do I have to look for feedback/logs on the installation
    procedure to get more insight, if any, on where it failed? (The whole
    logging on Unix/Linux and alikes is one of many subjects that I have to
    master sometime).
    B. How come it does install nicely on one system, but does not on
    another (seemingly identical or at least very similar) system?
    C. The most important question: how can I get these devices actually
    showing up?

    Any help would be greatly appreciated! Thanks.
    We only learn by making mistakes and screwing things up, right! ;)

    Regards,
    Andries

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