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  1. Mesos
  2. MESOS-9338

Add asynchronous DNS facilities to libprocess.

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Details

    • Improvement
    • Status: Accepted
    • Major
    • Resolution: Unresolved
    • None
    • None
    • libprocess

    Description

      This would enable non-blocking DNS queries. One use case is during TLS peer certificate verification, we need to perform a reverse DNS lookup to get the peer's hostname. This blocks the event loop thread!

      Some options:

      (1) Linux provides getaddrinfo_a, however I don't see an equivalent one for getnameinfo:
      http://man7.org/linux/man-pages/man3/getaddrinfo_a.3.html

      (2) A popular library is c-ares (MIT license):
      https://c-ares.haxx.se/

      (3) ADNS (GPLv3):
      https://www.gnu.org/software/adns/

      (4) c-ares has a list of other libraries:
      https://c-ares.haxx.se/otherlibs.html

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        Bug - A problem which impairs or prevents the functions of the product. MESOS-9339 SSL (TLS) peer reverse DNS lookup can block the event loop thread.

        • Major - Major loss of function.
        • Accepted
        relates to

        Bug - A problem which impairs or prevents the functions of the product. MESOS-9505 `make check` failed with linking errors when c-ares is installed.

        • Major - Major loss of function.
        • Resolved

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            Unassigned Unassigned
            bmahler Benjamin Mahler
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