NLnet Labs Name Server Daemon Input Plugin

This plugin gathers statistics from a NLnet Labs Name Server Daemon, an authoritative DNS name server.

Introduced in: Telegraf v1.0.0 Tags: server OS support: all

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

# A plugin to collect stats from the NSD DNS resolver
[[inputs.nsd]]
  ## Address of server to connect to, optionally ':port'. Defaults to the
  ## address in the nsd config file.
  server = "127.0.0.1:8953"

  ## If running as a restricted user you can prepend sudo for additional access:
  # use_sudo = false

  ## The default location of the nsd-control binary can be overridden with:
  # binary = "/usr/sbin/nsd-control"

  ## The default location of the nsd config file can be overridden with:
  # config_file = "/etc/nsd/nsd.conf"

  ## The default timeout of 1s can be overridden with:
  # timeout = "1s"

Permissions

It’s important to note that this plugin references nsd-control, which may require additional permissions to execute successfully. Depending on the user/group permissions of the telegraf user executing this plugin, you may need to alter the group membership, set facls, or use sudo.

Group membership (Recommended):

$ groups telegraf
telegraf : telegraf

$ usermod -a -G nsd telegraf

$ groups telegraf
telegraf : telegraf nsd

Sudo privileges: If you use this method, you will need the following in your telegraf config:

[[inputs.nsd]]
  use_sudo = true

You will also need to update your sudoers file:

$ visudo
# Add the following line:
Cmnd_Alias NSDCONTROLCTL = /usr/sbin/nsd-control
telegraf  ALL=(ALL) NOPASSWD: NSDCONTROLCTL
Defaults!NSDCONTROLCTL !logfile, !syslog, !pam_session

Please use the solution you see as most appropriate.

Metrics

This is the full list of stats provided by nsd-control. In the output, the dots in the nsd-control stat name are replaced by underscores (see https://www.nlnetlabs.nl/documentation/nsd/nsd-control/ for details).

• nsd

  • fields:
    • num_queries
    • time_boot
    • time_elapsed
    • size_db_disk
    • size_db_mem
    • size_xfrd_mem
    • size_config_disk
    • size_config_mem
    • num_type_TYPE0
    • num_type_A
    • num_type_NS
    • num_type_MD
    • num_type_MF
    • num_type_CNAME
    • num_type_SOA
    • num_type_MB
    • num_type_MG
    • num_type_MR
    • num_type_NULL
    • num_type_WKS
    • num_type_PTR
    • num_type_HINFO
    • num_type_MINFO
    • num_type_MX
    • num_type_TXT
    • num_type_RP
    • num_type_AFSDB
    • num_type_X25
    • num_type_ISDN
    • num_type_RT
    • num_type_NSAP
    • num_type_SIG
    • num_type_KEY
    • num_type_PX
    • num_type_AAAA
    • num_type_LOC
    • num_type_NXT
    • num_type_SRV
    • num_type_NAPTR
    • num_type_KX
    • num_type_CERT
    • num_type_DNAME
    • num_type_OPT
    • num_type_APL
    • num_type_DS
    • num_type_SSHFP
    • num_type_IPSECKEY
    • num_type_RRSIG
    • num_type_NSEC
    • num_type_DNSKEY
    • num_type_DHCID
    • num_type_NSEC3
    • num_type_NSEC3PARAM
    • num_type_TLSA
    • num_type_SMIMEA
    • num_type_CDS
    • num_type_CDNSKEY
    • num_type_OPENPGPKEY
    • num_type_CSYNC
    • num_type_SPF
    • num_type_NID
    • num_type_L32
    • num_type_L64
    • num_type_LP
    • num_type_EUI48
    • num_type_EUI64
    • num_type_TYPE252
    • num_type_TYPE253
    • num_type_TYPE255
    • num_opcode_QUERY
    • num_opcode_NOTIFY
    • num_class_CLASS0
    • num_class_IN
    • num_class_CH
    • num_rcode_NOERROR
    • num_rcode_FORMERR
    • num_rcode_SERVFAIL
    • num_rcode_NXDOMAIN
    • num_rcode_NOTIMP
    • num_rcode_REFUSED
    • num_rcode_YXDOMAIN
    • num_rcode_NOTAUTH
    • num_edns
    • num_ednserr
    • num_udp
    • num_udp6
    • num_tcp
    • num_tcp6
    • num_tls
    • num_tls6
    • num_answer_wo_aa
    • num_rxerr
    • num_txerr
    • num_raxfr
    • num_truncated
    • num_dropped
    • zone_master
    • zone_slave

• nsd_servers

  • tags:
    • server
  • fields:
    • queries

Example Output