conntrack

README

Conntrack Input 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.

Global configuration options

In addition to the plugin-specific configuration settings, plugins support additional global and plugin configuration settings. These settings are used to modify metrics, tags, and field or create aliases and configure ordering, etc. See the CONFIGURATION.md for more details.

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 directories will be ignored.
  dirs = ["/proc/sys/net/ipv4/netfilter","/proc/sys/net/netfilter"]

Metrics

• 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

Documentation

Index

• type Conntrack
  • func (c *Conntrack) Gather(acc telegraf.Accumulator) error
  • func (*Conntrack) SampleConfig() string

Types

type Conntrack

type Conntrack struct {
	Path  string
	Dirs  []string
	Files []string
}

func (*Conntrack) Gather

func (c *Conntrack) Gather(acc telegraf.Accumulator) error

func (*Conntrack) SampleConfig

func (*Conntrack) SampleConfig() string