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Ipset Input Plugin

This plugin gathers packets and bytes counters from Linux IP sets using the ipset command line tool.

Note

IP sets created without the "counters" option are ignored.

⭐ Telegraf v1.6.0 🏷️ network, system 💻 linux

Global configuration options

Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See CONFIGURATION.md for more details.

Configuration

# Gather packets and bytes counters from Linux ipsets
  [[inputs.ipset]]
    ## By default, we only show sets which have already matched at least 1 packet.
    ## set include_unmatched_sets = true to gather them all.
    # include_unmatched_sets = false

    ## Adjust your sudo settings appropriately if using this option ("sudo ipset save")
    ## You can avoid using sudo or root, by setting appropriate privileges for
    ## the telegraf.service systemd service.
    # use_sudo = false

    ## Add number of entries and number of individual IPs (resolve CIDR syntax) for each ipset
    # count_per_ip_entries = false

    ## The default timeout of 1s for ipset execution can be overridden here:
    # timeout = "1s"

Permissions

There are 3 ways to grant telegraf the right to run ipset:

  • Run as root (strongly discouraged)
  • Use sudo
  • Configure systemd to run telegraf with CAP_NET_ADMIN and CAP_NET_RAW capabilities

Using sudo

To use sudo set the use_sudo option to true and update your sudoers file:

$ visudo
# Add the following line:
Cmnd_Alias IPSETSAVE = /sbin/ipset save
telegraf  ALL=(root) NOPASSWD: IPSETSAVE
Defaults!IPSETSAVE !logfile, !syslog, !pam_session

Using systemd capabilities

You may run systemctl edit telegraf.service and add the following:

[Service]
CapabilityBoundingSet=CAP_NET_RAW CAP_NET_ADMIN
AmbientCapabilities=CAP_NET_RAW CAP_NET_ADMIN

Metrics

  • ipset

    • tags:
      • rule
      • set
    • fields:
      • timeout
      • packets
      • bytes

  • ipset (for count_per_ip_entries = true)

    • tags:
      • set
    • fields:
      • entries
      • ips

Example Output

$ sudo ipset save
create myset hash:net family inet hashsize 1024 maxelem 65536 counters comment
add myset 10.69.152.1 packets 8 bytes 672 comment "machine A"
ipset,rule=10.69.152.1,host=trashme,set=myset bytes_total=8i,packets_total=672i 1507615028000000000