Hi,
I am trying to visualize some system metrics on grafana. Metrics are
sent from CollectD to Logstash, then from Logstash to Elasticsearch and
from Elasticsearch to Grafana. The problem is rx tx if_octets and
if_packets metric is growing all the time. I would like to see
differential metric on the graph - how many octets or packets was send
and received in last 10 seconds.
I am using collectd 5.5 on CentOS 6.7 and I have compiled it from source
code. In /usr/share/collectd/types.db if_packets and if_octets are set
to DERIVE. As I understand from wiki page
https://collectd.org/wiki/index.php/Data_source this data should be sent
as a change from the last time:
[root@hdptest-mster2 collectd-5.5.0]# grep if_packets
/usr/share/collectd/types.db
if_packets rx:DERIVE:0:U, tx:DERIVE:0:U
[root@hdptest-mster2 collectd-5.5.0]# grep if_octets
/usr/share/collectd/types.db
if_octets rx:DERIVE:0:U, tx:DERIVE:0:U
Here is my configuration file:
[root@hdptest-mster2 collectd-5.5.0]# egrep -v ^#.* /etc/collectd.conf |
sed '/^$/d'
Hostname "ACI_184_vora2_Master_MT2"
TypesDB "/usr/share/collectd/types.db"
LoadPlugin cpu
LoadPlugin df
LoadPlugin disk
LoadPlugin exec
LoadPlugin interface
LoadPlugin load
LoadPlugin memory
LoadPlugin network
<Plugin cpu>
ReportByCpu true
ReportByState true
ValuesPercentage true
</Plugin>
<Plugin df>
Device "/dev/sda1"
Device "/dev/sdb1"
FSType "ext4"
ValuesPercentage true
</Plugin>
<Plugin disk>
Disk "/^sd[a-b]?$/"
IgnoreSelected false
</Plugin>
<Plugin interface>
Interface "eth0"
IgnoreSelected false
</Plugin>
<Plugin memory>
ValuesAbsolute true
ValuesPercentage false
</Plugin>
<Plugin network>
<Server "192.168.112.228" "25826">
</Server>
<Server "192.168.112.227" "25826">
</Server>
</Plugin>
This is a sample of raw data sent to logstash from this host:
[root@hdptest-elk logstash]# tail -f logstash-rawdata.log | grep MT2 |
grep if_octets
{"host":"ACI_184_vora2_Master_MT2","@timestamp":"2016-01-19T21:37:41.485Z","plugin":"interface","collectd_type":"if_octets","plugin_instance":"eth0","rx":4202999326,"tx":1272176172,"@version":"1","type":"collectd"}
{"host":"ACI_184_vora2_Master_MT2","@timestamp":"2016-01-19T21:37:51.485Z","plugin":"interface","plugin_instance":"eth0","collectd_type":"if_octets","rx":4203048744,"tx":1272200296,"@version":"1","type":"collectd"}
{"host":"ACI_184_vora2_Master_MT2","@timestamp":"2016-01-19T21:38:01.485Z","plugin":"interface","collectd_type":"if_octets","plugin_instance":"eth0","rx":4203131562,"tx":1272215389,"@version":"1","type":"collectd"}
{"host":"ACI_184_vora2_Master_MT2","@timestamp":"2016-01-19T21:38:11.485Z","plugin":"interface","collectd_type":"if_octets","plugin_instance":"eth0","rx":4203152162,"tx":1272241466,"@version":"1","type":"collectd"}
It looks like data are sent as a GAUGE value instead of DERIVE. What I
am doing wrong? How can I configure CollectD to send differential
statistics for the interfaces?
Best Regards,
Pawel
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