fluent-plugin-nostat

fluentd plugin for system resource monitoring whithout dstat

Installation

install with gem command as:

$ gem install fluent-plugin-nostat

configuration

<source>
  type nostat
  run_interval 1
  mode dstat # raw or dstat
  output_type graphite # hash or graphite
</source>

• tag : If there is no tag value, the tag will be "tag_prefix.hostname.nostat".
• run_interval : seconds
• mode : raw or dstat. raw : just get the values from /proc/STATS. dstat : modify the values as dstat.
• output_type : hash or graphite. hash : old version style. graphite : slice all output for grapite.
• tag_prefix : If there is no tag value, the tag will be "tag_prefix.hostname.nostat".

output

raw mode

the raw stats from /proc directory.

• cpu : time - http://www.linuxhowtos.org/System/procstat.htm
• memory : KB - https://www.centos.org/docs/5/html/5.1/Deployment_Guide/s2-proc-meminfo.html
• disk I/O : sector - https://www.kernel.org/doc/Documentation/ABI/testing/procfs-diskstats
• network I/O : bytes - http://www.onlamp.com/pub/a/linux/2000/11/16/LinuxAdmin.html

cpu={"usr"=>52773, "sys"=>28330, "idl"=>2217987, "wai"=>1995, "siq"=>4112, "hiq"=>0} disk={"sda"=>{"read"=>"9786551", "write"=>"29250018"}} net={"enp0s3"=>{"recv"=>8940623796, "send"=>383889456}, "enp0s8"=>{"recv"=>8940623796, "send"=>383889456}} mem={"total"=>1884188, "free"=>67968, "buff"=>0, "cach"=>1546820, "used"=>269400}

dstat mode

• cpu : percentage
• memory : bytes
• disk I/O : bytes/sec
• network I/O : bytes/sec cpu={"usr"=>0, "sys"=>0, "idl"=>100, "wai"=>0, "siq"=>0, "hiq"=>0} mem={"free"=>1693290496, "buff"=>0, "cach"=>60887040, "used"=>175230976} disk={"sda"=>{"read"=>0, "write"=>0}} net={"enp0s3"=>{"recv"=>344, "send"=>1668}, "enp0s8"=>{"recv"=>344, "send"=>1668}}

graphite output style

graphite output type is for fluent-plugin-graphite. To use this output type, graphite plugin should be installed by following command. There is no dependancy for that plugin yet.

gem install fluent-plugin-graphite

• full configuration example ``` type nostat tag_prefix graphite. run_interval 60 mode dstat output_type graphite

type graphite host 192.168.56.91 port 2003 tag_for prefix remove_tag_prefix graphite name_key_pattern ^*$

* output

tag : record hostname.nostat.cpu : usr => 10 hostname.nostat.cpu : sys => 0 hostname.nostat.cpu : idl => 90 hostname.nostat.cpu : wai => 0

...

hostname.nostat.mem : free => 1693290496 hostname.nostat.mem : buff => 0 hostname.nostat.mem : cach => 60887040 hostname.nostat.mem : used => 175230976

...

## it was tested on
. CentOS 7.x (kernel 3.10.x) with graphite