Benjamin Mahler created MESOS-9338:
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Summary: Add asynchronous DNS facilities to libprocess.
Key: MESOS-9338
URL: https://issues.apache.org/jira/browse/MESOS-9338
Project: Mesos
Issue Type: Improvement
Components: libprocess
Reporter: Benjamin Mahler
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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