[collectd] Collectd client data not written to Collectd Server

xflou xn9733 at gmail.com
Sun May 26 02:04:50 CEST 2019


Hello,

I have two Ubuntu hosts. One acts as the collected Server and the other as
a collectd client.

The configuration seems to be fine on both. The collectd client traffic
seems to be received at the collectd Server, but the data is not written to
the "/var/lib/collected/rdd" directory. The Tcpdump below confirms this.

On the collectd client side,  the tcp dump also indicates that the data is
being sent to the collectd server on the correct IP and port.

What I was expecting, is that the collected client data  received on the
collected server would be written to the
"/var/lib/collectd/rdd/clientMachineName" directory as a separate entry
from the "/var/lib/collectd/rdd/serverMachinename" directory.

Any ideas as to why this is not working as expected, would be appreciated.


Below are the /etc/collectd/collectd.conf file entries for the collectd
server and collectd client:


==============> Server config:

LoadPlugin logfile
LoadPlugin syslog
#LoadPlugin log_logstash

<Plugin logfile>
        LogLevel "info"
        File STDOUT
        Timestamp true
        PrintSeverity false
</Plugin>

<Plugin syslog>
        LogLevel info
</Plugin>


LoadPlugin cpu
LoadPlugin df
LoadPlugin disk
LoadPlugin entropy
LoadPlugin interface
LoadPlugin irq
LoadPlugin load
LoadPlugin memory
LoadPlugin network
LoadPlugin processes
LoadPlugin rrdtool
LoadPlugin swap
LoadPlugin users

<Plugin network>
#       # client setup:
        <Listen "0.0.0.0" "25826">
        </Listen>
</Plugin>

==> server netstat:
udp    17408      0 0.0.0.0:25826           0.0.0.0:*
    7223/collectd

===> server tcpcump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens3, link-type EN10MB (Ethernet), capture size 1500 bytes
19:41:56.652796 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1321
19:41:56.655302 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1316
19:41:56.656320 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1328
19:41:56.659259 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1289
19:42:06.642940 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1343


========> Client config is the same except for the network section below:

Plugin network>
#       # client setup:
        <Server "192.168.122.253" "25826">
        </Server>
</Plugin>


==> client netstat:
udp        0      0 0.0.0.0:51442           0.0.0.0:*
    7361/collectd

===> client tcpdump output below:
tcpdump -i ens3 -p -n -s 1500 udp port 25826
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens3, link-type EN10MB (Ethernet), capture size 1500 bytes
19:40:46.658595 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1343
19:40:46.660715 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1331
19:40:46.662103 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1289
19:40:46.672435 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1341
19:40:56.656713 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1285
19:40:56.659586 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1344
19:40:56.660752 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1338
19:40:56.663490 IP 192.168.122.20.51442 > 192.168.122.253.25826: UDP,
length 1323



Thanks!!
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