Add prometheus metrics for Central controllers (#1969)

* add header-only prometheus lib to ext

* rename folder

* Undo rename directory

* prometheus simpleapi included on mac & linux

* wip

* wire up some controller stats

* Get windows building with prometheus

* bsd build flags for prometheus

* Fix multiple network join from environment entrypoint.sh.release (#1961)

* _bond_m guards _bond, not _paths_m (#1965)

* Fix: warning: mutex '_aqm_m' is not held on every path through here [-Wthread-safety-analysis] (#1964)

* Serve prom metrics from /metrics endpoint

* Add prom metrics for Central controller specific things

* reorganize metric initialization

* testing out a labled gauge on Networks

* increment error counter on throw

* Consolidate metrics definitions

Put all metric definitions into node/Metrics.hpp.  Accessed as needed
from there.

* Revert "testing out a labled gauge on Networks"

This reverts commit 499ed6d95e11452019cdf48e32ed4cd878c2705b.

* still blows up but adding to the record for completeness right now

* Fix runtime issues with metrics

* Add metrics files to visual studio project

* Missed an "extern"

* add copyright headers to new files

* Add metrics for sent/received bytes (total)

* put /metrics endpoint behind auth

* sendto returns int on Win32

---------

Co-authored-by: Leonardo Amaral <[email protected]>
Co-authored-by: Brenton Bostick <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/objects.mk b/objects.mk
index 61df844b..d07578fb 100644
--- a/objects.mk
+++ b/objects.mk
@@ -10,6 +10,7 @@ CORE_OBJS=\
 	node/IncomingPacket.o \
 	node/InetAddress.o \
 	node/Membership.o \
+	node/Metrics.o \
 	node/Multicaster.o \
 	node/Network.o \
 	node/NetworkConfig.o \