telegraf/plugins/inputs/gnmi

gNMI (gRPC Network Management Interface) Input Plugin

This plugin consumes telemetry data based on the gNMI Subscribe method. TLS is supported for authentication and encryption. This input plugin is vendor-agnostic and is supported on any platform that supports the gNMI spec.

For Cisco devices:

It has been optimized to support gNMI telemetry as produced by Cisco IOS XR (64-bit) version 6.5.1, Cisco NX-OS 9.3 and Cisco IOS XE 16.12 and later.

Configuration

# gNMI telemetry input plugin
[[inputs.gnmi]]
  ## Address and port of the gNMI GRPC server
  addresses = ["10.49.234.114:57777"]

  ## define credentials
  username = "cisco"
  password = "cisco"

  ## gNMI encoding requested (one of: "proto", "json", "json_ietf", "bytes")
  # encoding = "proto"

  ## redial in case of failures after
  redial = "10s"

  ## enable client-side TLS and define CA to authenticate the device
  # enable_tls = true
  # tls_ca = "/etc/telegraf/ca.pem"
  # insecure_skip_verify = true

  ## define client-side TLS certificate & key to authenticate to the device
  # tls_cert = "/etc/telegraf/cert.pem"
  # tls_key = "/etc/telegraf/key.pem"

  ## gNMI subscription prefix (optional, can usually be left empty)
  ## See: https://github.com/openconfig/reference/blob/master/rpc/gnmi/gnmi-specification.md#222-paths
  # origin = ""
  # prefix = ""
  # target = ""

  ## Define additional aliases to map telemetry encoding paths to simple measurement names
  # [inputs.gnmi.aliases]
  #   ifcounters = "openconfig:/interfaces/interface/state/counters"

  [[inputs.gnmi.subscription]]
    ## Name of the measurement that will be emitted
    name = "ifcounters"

    ## Origin and path of the subscription
    ## See: https://github.com/openconfig/reference/blob/master/rpc/gnmi/gnmi-specification.md#222-paths
    ##
    ## origin usually refers to a (YANG) data model implemented by the device
    ## and path to a specific substructure inside it that should be subscribed to (similar to an XPath)
    ## YANG models can be found e.g. here: https://github.com/YangModels/yang/tree/master/vendor/cisco/xr
    origin = "openconfig"
    path = "/interfaces/interface/state/counters"

    # Subscription mode (one of: "target_defined", "sample", "on_change") and interval
    subscription_mode = "sample"
    sample_interval = "10s"

    ## Suppress redundant transmissions when measured values are unchanged
    # suppress_redundant = false

    ## If suppression is enabled, send updates at least every X seconds anyway
    # heartbeat_interval = "60s"

  ## Tag subscriptions are subscriptions to paths intended to be applied as tags to other subscriptions
  [[inputs.gnmi.tag_subscription]]
    # When applying this value as a tag to other metrics, use this tag name
    name = "descr"
    # All other subscription fields are as normal
    origin = "openconfig"
    path = "/interfaces/interface/state/description"
    subscription_mode = "on_change"
    # At least one path element name must be supplied that contains at least one key to match on
    # Multiple element names can be specified in any order - all element names must be present and contain
    # to be stored as an in-memory tag
    elements = ["interface"]

Metrics

Each configured subscription will emit a different measurement. Each leaf in a GNMI SubscribeResponse Update message will produce a field reading in the measurement. GNMI PathElement keys for leaves will attach tags to the field(s).

Example Output

ifcounters,path=openconfig-interfaces:/interfaces/interface/state/counters,host=linux,name=MgmtEth0/RP0/CPU0/0,source=10.49.234.115,descr/description=Foo in-multicast-pkts=0i,out-multicast-pkts=0i,out-errors=0i,out-discards=0i,in-broadcast-pkts=0i,out-broadcast-pkts=0i,in-discards=0i,in-unknown-protos=0i,in-errors=0i,out-unicast-pkts=0i,in-octets=0i,out-octets=0i,last-clear="2019-05-22T16:53:21Z",in-unicast-pkts=0i 1559145777425000000
ifcounters,path=openconfig-interfaces:/interfaces/interface/state/counters,host=linux,name=GigabitEthernet0/0/0/0,source=10.49.234.115,descr/description=Bar out-multicast-pkts=0i,out-broadcast-pkts=0i,in-errors=0i,out-errors=0i,in-discards=0i,out-octets=0i,in-unknown-protos=0i,in-unicast-pkts=0i,in-octets=0i,in-multicast-pkts=0i,in-broadcast-pkts=0i,last-clear="2019-05-22T16:54:50Z",out-unicast-pkts=0i,out-discards=0i 1559145777425000000