[rancid] Entries disappear and re appear.

heasley heas at shrubbery.net
Wed Apr 17 22:00:14 UTC 2019

Fri, Apr 12, 2019 at 08:35:07AM -0700, Troy Beisigl:
> Thanks. We are seeing it happen randomly across 17 RB3011UiAS-RM. It only happens every day or 2 and only happens to 1 or 2 units each time. The version of Rancid we are running was a fresh install on a new machine about 30 days ago, so wondering if it is something not setup correctly or if it is a bug with the plugins. 
> Best,
> -Troy

Discussing this with another user (who can reveal themselves if they wish)
that had experienced this, it was discovered their devices suffer from memory
shortages.  When malloc failures occur, parts of the configuration may
disappear and reappear.  Furthermore, it seems that there is no error or
indication that the missing configuration was due to such a failure vs. a
real configuration change, and therefore no way for rancid to recognize it.

Can you check if you are having malloc failures?

> > On Apr 12, 2019, at 1:39 AM, Alex DEKKER <rancid at ale.cx> wrote:
> > 
> > On 11/04/2019 19:54, heasley wrote:
> >> Thu, Apr 11, 2019 at 09:51:20AM -0700, Emille Blanc:
> >>> 
> >>> Overall, our experience with Mikrotiks have been pretty poor.
> >>> They frequently drop their entire config from the output, or selectively random blocks of config (Interfaces, GPS, firmware and version stats), but we just summed that up as another of Mikrotik's long line of humble quirks.
> >>> 
> > I've never had any problems of this nature with Mikrotik devices, although I only have about 5 of them on RANCID.
> > 
> >> while i've heard similar comments and have none of these boxes myself, its
> >> possible that there is a problem with the rancid mikrotik support.  if
> >> someone wants to give me remote access to one, i can verify/improve the
> >> rancid support for it.
> > 
> > You can spin up a virtual one for free. It will be limited to 1Mbps but that is adequate for testing the RANCID module, I'm sure.
> > 
> > https://wiki.mikrotik.com/wiki/Manual:CHR
> > 
> > alexd
> > 
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