To collectd metrics from servers I use databases/opentsdb and net-mgmt/collectd5.
UPDATE
This patch has been merged with this
Collectd5 can natively use an OpenTSDB database as output but when you use the FreeBSD port, this output plugin isn't included (don't ask me why): here is how to patch net-mgmt/collectd5 to include it.
Basically we need to apply to Makefile this patch:
--- Makefile.orig 2016-04-04 07:04:56.231162000 -0400
+++ Makefile 2016-04-04 06:58:51.146676000 -0400
@@ -24,7 +24,8 @@
OPTIONS_DEFINE= CGI DEBUG GCRYPT LOGSTASH VIRT
OPTIONS_GROUP= INPUT OUTPUT
-OPTIONS_GROUP_OUTPUT= KAFKA MONGODB NOTIFYDESKTOP NOTIFYEMAIL RIEMANN RRDTOOL
+OPTIONS_GROUP_OUTPUT= KAFKA MONGODB NOTIFYDESKTOP NOTIFYEMAIL RIEMANN RRDTOOL \
+ TSDB
OPTIONS_GROUP_INPUT= CURL CURL_JSON CURL_XML DBI IPMI JSON MEMCACHEC \
MODBUS MYSQL NUTUPS OLSRD ONEWIRE OPENLDAP \
PERL PGSQL PINBA PING PYTHON RABBITMQ REDIS ROUTEROS \
@@ -67,6 +68,7 @@
STATGRAB_DESC= Enable statgrab-based plugins (interface, etc)
STATSD_DESC= Enable statsd plugin
TOKYOTYRANT_DESC= Enable tokyotyrant plugin
+TSDB_DESC= Enable write_tsdb plugin
VARNISH_DESC= Enable varnish 4.x cache statistics
VIRT_DESC= Enable libvirt plugin (requires XML)
XML_DESC= Enable XML plugins
@@ -247,6 +249,8 @@
TOKYOTYRANT_CONFIGURE_ENABLE= tokyotyrant
TOKYOTYRANT_CONFIGURE_WITH= libtokyotyrant=${LOCALBASE}
+TSDB_CONFIGURE_ENABLE= write_tsdb
+
VARNISH_LIB_DEPENDS= libvarnishapi.so:${PORTSDIR}/www/varnish4
VARNISH_CONFIGURE_ENABLE= varnish
VARNISH_CONFIGURE_WITH= libvarnish=${LOCALBASE}
and this to pkg-plist:
--- pkg-plist.orig 2016-04-04 07:04:41.492617000 -0400
+++ pkg-plist 2016-04-04 07:04:26.272999000 -0400
@@ -72,6 +72,7 @@
%%SIGROK%%lib/collectd/sigrok.so
%%SNMP%%lib/collectd/snmp.so
%%STATSD%%lib/collectd/statsd.so
+%%TSDB%%lib/collectd/write_tsdb.so
lib/collectd/swap.so
lib/collectd/syslog.so
lib/collectd/table.so
That's all, folks!