conntrack

Conntrack Plugin

Collects stats from Netfilter's conntrack-tools.

The conntrack-tools provide a mechanism for tracking various aspects of network connections as they are processed by netfilter. At runtime, conntrack exposes many of those connection statistics within /proc/sys/net. Depending on your kernel version, these files can be found in either /proc/sys/net/ipv4/netfilter or /proc/sys/net/netfilter and will be prefixed with either ip_ or nf_. This plugin reads the files specified in its configuration and publishes each one as a field, with the prefix normalized to ip_.

In order to simplify configuration in a heterogeneous environment, a superset of directory and filenames can be specified. Any locations that don't exist will be ignored.

For more information on conntrack-tools, see the Netfilter Documentation.

Configuration:

 # Collects conntrack stats from the configured directories and files.
 [[inputs.conntrack]]
   ## The following defaults would work with multiple versions of conntrack.
   ## Note the nf_ and ip_ filename prefixes are mutually exclusive across
   ## kernel versions, as are the directory locations.

   ## Superset of filenames to look for within the conntrack dirs.
   ## Missing files will be ignored.
   files = ["ip_conntrack_count","ip_conntrack_max",
            "nf_conntrack_count","nf_conntrack_max"]

   ## Directories to search within for the conntrack files above.
   ## Missing directrories will be ignored.
   dirs = ["/proc/sys/net/ipv4/netfilter","/proc/sys/net/netfilter"]

Measurements & Fields:

• conntrack
  • ip_conntrack_count (int, count): the number of entries in the conntrack table
  • ip_conntrack_max (int, size): the max capacity of the conntrack table

Tags:

This input does not use tags.

Example Output:

$ ./telegraf --config telegraf.conf --input-filter conntrack --test
conntrack,host=myhost ip_conntrack_count=2,ip_conntrack_max=262144 1461620427667995735