collectd.conf

Interval 10
CheckThresholds true

LoadPlugin syslog
LoadPlugin cpu
LoadPlugin df
LoadPlugin interface
LoadPlugin load
LoadPlugin memory
LoadPlugin processes
LoadPlugin swap
LoadPlugin threshold
LoadPlugin aggregation
LoadPlugin match_regex
LoadPlugin write_riemann

Include "/etc/collectd.d/*.conf"

gistfile1.txt

<Plugin "processes">
    Process "collectd"
</Plugin>
<Plugin "aggregation">
  <Aggregation>
    Plugin "cpu"
    Type "cpu"

    GroupBy "Host"
    GroupBy "TypeInstance"

    CalculateAverage true
  </Aggregation>
</Plugin>

<Chain "PostCache">
  <Rule>
    <Match regex>
      Plugin "^cpu$"
      PluginInstance "^[0-9]+$"
    </Match>
    <Target write>
      Plugin "aggregation"
    </Target>
    Target stop
  </Rule>
  Target "write"
</Chain>

LoadPlugin nginx

<Plugin nginx>
       URL "http://127.0.0.1/nginx_status"
</Plugin>

<Plugin "processes">
    Process "nginx"
</Plugin>
<Plugin "processes">
    Process "collectd"
</Plugin>
<Plugin "processes">
    Process "rsyslogd"
</Plugin>
<Plugin "write_riemann">
    <Node "riemanna">
        Host "riemanna.lovedthanlost.net"
        Port "5555"
        Protocol TCP
        StoreRates true
        CheckThresholds true
    </Node>
    Tag "collectd"
</Plugin>

syslog.log

Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (PostCache): Signaling `continue' at end of chain.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin_dispatch_values: time = 1433428822.424; interval = 10.000; host = app1-web1; plugin = processes; plugin_instance = rsyslogd; type = ps_disk_octets; type_instance = ;
Jun  4 14:40:22 app1-web1 collectd[14553]: uc_update: app1-web1/processes-rsyslogd/ps_disk_octets: ds[0] = 0.000000
Jun  4 14:40:22 app1-web1 collectd[14553]: uc_update: app1-web1/processes-rsyslogd/ps_disk_octets: ds[1] = 14912.625390
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (chain = PostCache);
Jun  4 14:40:22 app1-web1 collectd[14553]: regex match: Regular expression `^cpu$' does not match `processes'.
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (PostCache): Executing the default targets.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin: plugin_write: Writing values via aggregation.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin: plugin_write: Writing values via write_riemann/riemanna.
Jun  4 14:40:22 app1-web1 collectd[14553]: write_riemann plugin: Successfully created protobuf for metric: host = "app1-web1", service = "processes-rsyslogd/ps_disk_octets/read"
Jun  4 14:40:22 app1-web1 collectd[14553]: write_riemann plugin: Successfully created protobuf for metric: host = "app1-web1", service = "processes-rsyslogd/ps_disk_octets/write"
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (PostCache): Signaling `continue' at end of chain.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin_dispatch_values: time = 1433428822.424; interval = 10.000; host = app1-web1; plugin = processes; plugin_instance = rsyslogd; type = ps_disk_ops; type_instance = ;
Jun  4 14:40:22 app1-web1 collectd[14553]: uc_update: app1-web1/processes-rsyslogd/ps_disk_ops: ds[0] = 0.000000
Jun  4 14:40:22 app1-web1 collectd[14553]: uc_update: app1-web1/processes-rsyslogd/ps_disk_ops: ds[1] = 41.105801
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (chain = PostCache);
Jun  4 14:40:22 app1-web1 collectd[14553]: regex match: Regular expression `^cpu$' does not match `processes'.
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (PostCache): Executing the default targets.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin: plugin_write: Writing values via aggregation.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin: plugin_write: Writing values via write_riemann/riemanna.
Jun  4 14:40:22 app1-web1 collectd[14553]: write_riemann plugin: Successfully created protobuf for metric: host = "app1-web1", service = "processes-rsyslogd/ps_disk_ops/read"
Jun  4 14:40:22 app1-web1 collectd[14553]: write_riemann plugin: Successfully created protobuf for metric: host = "app1-web1", service = "processes-rsyslogd/ps_disk_ops/write"
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (PostCache): Signaling `continue' at end of chain.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin_dispatch_values: time = 1433428822.424; interval = 10.000; host = app1-web1; plugin = processes; plugin_instance = ; type = fork_rate; type_instance = ;
Jun  4 14:40:22 app1-web1 collectd[14553]: uc_update: app1-web1/processes/fork_rate: ds[0] = 6.585022
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (chain = PostCache);
Jun  4 14:40:22 app1-web1 collectd[14553]: regex match: Regular expression `^cpu$' does not match `processes'.
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (PostCache): Executing the default targets.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin: plugin_write: Writing values via aggregation.
Jun  4 14:40:22 app1-web1 collectd[14553]: plugin: plugin_write: Writing values via write_riemann/riemanna.
Jun  4 14:40:22 app1-web1 collectd[14553]: write_riemann plugin: Successfully created protobuf for metric: host = "app1-web1", service = "processes/fork_rate"
Jun  4 14:40:22 app1-web1 collectd[14553]: fc_process_chain (PostCache): Signaling `continue' at end of chain.