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Ed Schouten de44cbc21d Add a Prometheus exporter for sysctl values.
Now that we have our sysctl tree annotated with aggregation labels,
let's go ahead and provide a very simple utility for exporting the
sysctl tree in Prometheus' format. It can either be used in conjunction
with the Prometheus node exporter or run through inetd(8).

The reason why I'm opting for having it in the base system is because it
has a pretty strong integration with some of sysctl's innards, such as
access to iterators, name lookups, metadata and type information. As I
am investigating whether we can add histograms as native types to sysctl
as well, this integration will only get stronger as we go along. That's
why it would be safer to oversee the development of this exporter
ourselves, as opposed to having it as an external project.

This exporter is remarkably compact, especially when compared to the
official Linux binary of the Prometheus node exporter (16 KB vs 12 MB).
I guess this could be an interesting aspect for monitoring embedded
FreeBSD-based systems.

Differential Revision:	https://reviews.freebsd.org/D8792
2016-12-21 08:29:44 +00:00
bin Fix ls_tests:o_flag with ZFS TMPDIR 2016-12-15 16:13:52 +00:00
cddl Avoid modifying the object string table when patching USDT probes. 2016-12-20 18:25:41 +00:00
contrib Merge bmake-20161212 2016-12-19 23:38:07 +00:00
crypto MFV r308196: 2016-11-02 06:49:25 +00:00
etc Merge ^/head r309817 through r310168. 2016-12-16 18:38:31 +00:00
gnu Add WITH_LLD_AS_LD build knob 2016-11-25 13:15:28 +00:00
include hyperv: Allow userland to ro-mmap reference TSC page 2016-12-15 03:32:24 +00:00
kerberos5 DIRDEPS_BUILD: Update dependencies 2016-06-14 16:55:05 +00:00
lib Fix memory leak. 2016-12-20 20:11:16 +00:00
libexec Fix typo. 2016-12-16 14:23:08 +00:00
release Revert r309339, thus re-instating r309314 2016-12-16 23:05:47 +00:00
rescue DIRDEPS_BUILD: Update dependencies. 2016-11-13 00:11:30 +00:00
sbin Add a free_iovec() function to reset iovec's. 2016-12-14 21:26:43 +00:00
secure Prefer ACFLAGS over CFLAGS for compiling aarch64 assembly files. 2016-10-26 20:12:30 +00:00
share Add amdmi3 to ports-secteam 2016-12-21 01:48:54 +00:00
sys hyperv: Unbreak EARLY_AP_STARUP Hyper-V bootstrap by using intrhook 2016-12-21 03:23:35 +00:00
targets Merge ^/head r308491 through r308841. 2016-11-19 16:05:55 +00:00
tests reaper: Make REAPER_KILL_SUBTREE actually work. 2016-12-14 22:49:20 +00:00
tools Comment the RCSID. 2016-12-19 15:09:30 +00:00
usr.bin Merge bmake-20161212 2016-12-19 23:38:07 +00:00
usr.sbin Add a Prometheus exporter for sysctl values. 2016-12-21 08:29:44 +00:00
.arcconfig callsign isn't required anymore 2016-09-29 06:19:45 +00:00
.arclint phabricator related changes: 2015-04-20 20:33:22 +00:00
COPYRIGHT Bump copyright year. 2015-12-31 11:21:45 +00:00
LOCKS Explicitly require Security Officer's approval for kernel PRNG bits. 2013-09-17 14:19:05 +00:00
MAINTAINERS Remove myself from kern_timeout.c yeah! 2016-07-27 20:37:32 +00:00
Makefile Import bmake-20161212 2016-12-19 21:50:59 +00:00
Makefile.inc1 Revert r309339, thus re-instating r309314 2016-12-16 23:05:47 +00:00
Makefile.libcompat Fix in-tree GCC builds after r304681. 2016-08-23 19:29:37 +00:00
ObsoleteFiles.inc Add ld.debug to ObsoleteFiles.inc 2016-12-19 15:23:24 +00:00
README Import OpenSSL 1.0.2j. 2016-09-26 14:13:11 +00:00
UPDATING Put a tentative import date in ObsoleteFiles.inc and UPDATING. 2016-12-17 18:35:17 +00:00

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