snmp

SNMP Plugin

The SNMP input plugin gathers metrics from SNMP agents.

Configuration:

See additional SNMP plugin configuration examples here.

Example:

SNMP data:

.1.0.0.0.1.1.0 octet_str "foo"
.1.0.0.0.1.1.1 octet_str "bar"
.1.0.0.0.1.102 octet_str "bad"
.1.0.0.0.1.2.0 integer 1
.1.0.0.0.1.2.1 integer 2
.1.0.0.0.1.3.0 octet_str "0.123"
.1.0.0.0.1.3.1 octet_str "0.456"
.1.0.0.0.1.3.2 octet_str "9.999"
.1.0.0.1.1 octet_str "baz"
.1.0.0.1.2 uinteger 54321
.1.0.0.1.3 uinteger 234

Telegraf config:

[[inputs.snmp]]
  agents = [ "127.0.0.1:161" ]
  version = 2
  community = "public"

  name = "system"
  [[inputs.snmp.field]]
    name = "hostname"
    oid = ".1.0.0.1.1"
    is_tag = true
  [[inputs.snmp.field]]
    name = "uptime"
    oid = ".1.0.0.1.2"
  [[inputs.snmp.field]]
    name = "loadavg"
    oid = ".1.0.0.1.3"
    conversion = "float(2)"

  [[inputs.snmp.table]]
    name = "remote_servers"
    inherit_tags = [ "hostname" ]
    [[inputs.snmp.table.field]]
      name = "server"
      oid = ".1.0.0.0.1.1"
      is_tag = true
    [[inputs.snmp.table.field]]
      name = "connections"
      oid = ".1.0.0.0.1.2"
    [[inputs.snmp.table.field]]
      name = "latency"
      oid = ".1.0.0.0.1.3"
      conversion = "float"

Resulting output:

* Plugin: snmp, Collection 1
> system,agent_host=127.0.0.1,host=mylocalhost,hostname=baz loadavg=2.34,uptime=54321i 1468953135000000000
> remote_servers,agent_host=127.0.0.1,host=mylocalhost,hostname=baz,server=foo connections=1i,latency=0.123 1468953135000000000
> remote_servers,agent_host=127.0.0.1,host=mylocalhost,hostname=baz,server=bar connections=2i,latency=0.456 1468953135000000000

Configuration via MIB:

This example uses the SNMP data above, but is configured via the MIB. The example MIB file can be found in the testdata directory. See the MIB lookups section for more information.

Telegraf config:

[[inputs.snmp]]
  agents = [ "127.0.0.1:161" ]
  version = 2
  community = "public"

  [[inputs.snmp.field]]
    oid = "TEST::hostname"
    is_tag = true

  [[inputs.snmp.table]]
    oid = "TEST::testTable"
    inherit_tags = [ "hostname" ]

Resulting output:

* Plugin: snmp, Collection 1
> testTable,agent_host=127.0.0.1,host=mylocalhost,hostname=baz,server=foo connections=1i,latency="0.123" 1468953135000000000
> testTable,agent_host=127.0.0.1,host=mylocalhost,hostname=baz,server=bar connections=2i,latency="0.456" 1468953135000000000

Config parameters

• agents: Default: [] List of SNMP agents to connect to in the form of [tcp://]IP[:PORT]. If :PORT is unspecified, it defaults to 161. When using the optional prefix tcp://, SNMP over TCP will be used. Otherwise UDP is used as the transport protocol.

• version: Default: 2 SNMP protocol version to use.

• community: Default: "public" SNMP community to use.

• max_repetitions: Default: 50 Maximum number of iterations for repeating variables.

• sec_name: Security name for authenticated SNMPv3 requests.

• auth_protocol: Values: "MD5","SHA","". Default: "" Authentication protocol for authenticated SNMPv3 requests.

• auth_password: Authentication password for authenticated SNMPv3 requests.

• sec_level: Values: "noAuthNoPriv","authNoPriv","authPriv". Default: "noAuthNoPriv" Security level used for SNMPv3 messages.

• context_name: Context name used for SNMPv3 requests.

• priv_protocol: Values: "DES","AES","". Default: "" Privacy protocol used for encrypted SNMPv3 messages.

• priv_password: Privacy password used for encrypted SNMPv3 messages.

• name: Output measurement name.

Field parameters:

• oid: OID to get. May be a numeric or textual OID.

• oid_index_suffix: The OID sub-identifier to strip off so that the index can be matched against other fields in the table.

• oid_index_length: Specifies the length of the index after the supplied table OID (in OID path segments). Truncates the index after this point to remove non-fixed value or length index suffixes.

• name: Output field/tag name. If not specified, it defaults to the value of oid. If oid is numeric, an attempt to translate the numeric OID into a texual OID will be made.

• is_tag: Output this field as a tag.

• conversion: Values: "float(X)","float","int","". Default: "" Converts the value according to the given specification.

  • float(X): Converts the input value into a float and divides by the Xth power of 10. Efficively just moves the decimal left X places. For example a value of 123 with float(2) will result in 1.23.
  • float: Converts the value into a float with no adjustment. Same as float(0).
  • int: Convertes the value into an integer.
  • hwaddr: Converts the value to a MAC address.
  • ipaddr: Converts the value to an IP address.

Table parameters:

• oid: Automatically populates the table's fields using data from the MIB.

• name: Output measurement name. If not specified, it defaults to the value of oid. If oid is numeric, an attempt to translate the numeric OID into a texual OID will be made.

• inherit_tags: Which tags to inherit from the top-level config and to use in the output of this table's measurement.

• index_as_tag: Adds each row's index within the table as a tag.

MIB lookups

If the plugin is configured such that it needs to perform lookups from the MIB, it will use the net-snmp utilities snmptranslate and snmptable.

When performing the lookups, the plugin will load all available MIBs. If your MIB files are in a custom path, you may add the path using the MIBDIRS environment variable. See man 1 snmpcmd for more information on the variable.