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Strings

The event-strings processor, exposes a few of Golang strings transformation functions, there functions can be applied to tags, tag names, values or value names.

Supported functions:

  • strings.Replace
  • strings.TrimPrefix
  • strings.TrimSuffix
  • strings.Title
  • strings.ToLower
  • strings.ToUpper
  • strings.Split
  • filepath.Base
processors:
  # processor name
  sample-processor:
    # processor type
    event-strings:
      value-names: []
      tag-names: []
      values: []
      tags: []
      transforms:
        # strings function name
        - replace:
            apply-on:  # apply the transformation on name or value
            keep: # keep the old value or not if the name changed
            old: # string to be replaced
            new: #replacement string of old
        - trim-prefix:
            apply-on: # apply the transformation on name or value
            prefix: # prefix to be trimmed
        - trim_suffix:
            apply-on: # apply the transformation on name or value
            suffix: # suffix to be trimmed
        - title:
            apply-on: # apply the transformation on name or value
        - to-upper:
            apply-on: # apply the transformation on name or value
        - to-lower:
            apply-on: # apply the transformation on name or value
        - split:
            apply-on: # apply the transformation on name or value
            split-on: # character to split on
            join-with: # character to join with
            ignore-first: # number of first items to ignore when joining
            ignore-last: # number of last items to ignore when joining
        - path-base:
            apply-on: # apply the transformation on name or value 

Examples#

replace#

processors:
  # processor name
  sample-processor:
    # processor type
    event-strings:
      value-names:
        - ".*"
      transforms:
        # strings function name
        - replace:
            apply-on: "name"
            old: "-"
            new: "_"
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "carrier-transitions": "1",
        "in-error-packets": "0",
        "in-fcs-error-packets": "0",
        "in-octets": "65382630",
        "in-unicast-packets": "107154",
        "out-error-packets": "0",
        "out-octets": "64721394",
        "out-unicast-packets": "105876"
    }
}
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "carrier_transitions": "1",
        "in_error_packets": "0",
        "in_fcs_error_packets": "0",
        "in_octets": "65382630",
        "in_unicast_packets": "107154",
        "out_error_packets": "0",
        "out_octets": "64721394",
        "out_unicast_packets": "105876"
    }
}

trim-prefix#

processors:
  # processor name
  sample-processor:
    # processor type
    event-strings:
      value-names:
        - ".*"
      transforms:
        # strings function name
        - trim-prefix:
            apply-on: "name"
            prefix: "/srl_nokia-interfaces:interface/statistics/"
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "/srl_nokia-interfaces:interface/statistics/carrier-transitions": "1",
        "/srl_nokia-interfaces:interface/statistics/in-broadcast-packets": "3797",
        "/srl_nokia-interfaces:interface/statistics/in-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-fcs-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-multicast-packets": "288033",
        "/srl_nokia-interfaces:interface/statistics/in-octets": "65382630",
        "/srl_nokia-interfaces:interface/statistics/in-unicast-packets": "107154",
        "/srl_nokia-interfaces:interface/statistics/out-broadcast-packets": "614",
        "/srl_nokia-interfaces:interface/statistics/out-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/out-multicast-packets": "11",
        "/srl_nokia-interfaces:interface/statistics/out-octets": "64721394",
        "/srl_nokia-interfaces:interface/statistics/out-unicast-packets": "105876"
    }
}
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "carrier-transitions": "1",
        "in-broadcast-packets": "3797",
        "in-error-packets": "0",
        "in-fcs-error-packets": "0",
        "in-multicast-packets": "288033",
        "in-octets": "65382630",
        "in-unicast-packets": "107154",
        "out-broadcast-packets": "614",
        "out-error-packets": "0",
        "out-multicast-packets": "11",
        "out-octets": "64721394",
        "out-unicast-packets": "105876"
    }
}

to-upper#

processors:
  # processor name
  sample-processor:
    # processor type
    event-strings:
      tag-names:
        - "interface_name"
        - "subscription-name"
      transforms:
        # strings function name
        - to-upper:
            apply-on: "value"
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "/srl_nokia-interfaces:interface/statistics/carrier-transitions": "1",
        "/srl_nokia-interfaces:interface/statistics/in-broadcast-packets": "3797",
        "/srl_nokia-interfaces:interface/statistics/in-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-fcs-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-multicast-packets": "288033",
        "/srl_nokia-interfaces:interface/statistics/in-octets": "65382630",
        "/srl_nokia-interfaces:interface/statistics/in-unicast-packets": "107154",
        "/srl_nokia-interfaces:interface/statistics/out-broadcast-packets": "614",
        "/srl_nokia-interfaces:interface/statistics/out-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/out-multicast-packets": "11",
        "/srl_nokia-interfaces:interface/statistics/out-octets": "64721394",
        "/srl_nokia-interfaces:interface/statistics/out-unicast-packets": "105876"
    }
}
   {
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "MGMT0",
        "source": "172.23.23.2:57400",
        "subscription-name": "DEFAULT"
    },
    "values": {
        "/srl_nokia-interfaces:interface/statistics/carrier-transitions": "1",
        "/srl_nokia-interfaces:interface/statistics/in-broadcast-packets": "3797",
        "/srl_nokia-interfaces:interface/statistics/in-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-fcs-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-multicast-packets": "288033",
        "/srl_nokia-interfaces:interface/statistics/in-octets": "65382630",
        "/srl_nokia-interfaces:interface/statistics/in-unicast-packets": "107154",
        "/srl_nokia-interfaces:interface/statistics/out-broadcast-packets": "614",
        "/srl_nokia-interfaces:interface/statistics/out-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/out-multicast-packets": "11",
        "/srl_nokia-interfaces:interface/statistics/out-octets": "64721394",
        "/srl_nokia-interfaces:interface/statistics/out-unicast-packets": "105876"
    }
}

path-base#

processors:
  # processor name
  sample-processor:
    # processor type
    event-strings:
      value-names:
        - ".*"
      transforms:
        # strings function name
        - path-base:
            apply-on: "name"
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "/srl_nokia-interfaces:interface/statistics/carrier-transitions": "1",
        "/srl_nokia-interfaces:interface/statistics/in-broadcast-packets": "3797",
        "/srl_nokia-interfaces:interface/statistics/in-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-fcs-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-multicast-packets": "288033",
        "/srl_nokia-interfaces:interface/statistics/in-octets": "65382630",
        "/srl_nokia-interfaces:interface/statistics/in-unicast-packets": "107154",
        "/srl_nokia-interfaces:interface/statistics/out-broadcast-packets": "614",
        "/srl_nokia-interfaces:interface/statistics/out-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/out-multicast-packets": "11",
        "/srl_nokia-interfaces:interface/statistics/out-octets": "64721394",
        "/srl_nokia-interfaces:interface/statistics/out-unicast-packets": "105876"
    }
}
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "carrier-transitions": "1",
        "in-broadcast-packets": "3797",
        "in-error-packets": "0",
        "in-fcs-error-packets": "0",
        "in-multicast-packets": "288033",
        "in-octets": "65382630",
        "in-unicast-packets": "107154",
        "out-broadcast-packets": "614",
        "out-error-packets": "0",
        "out-multicast-packets": "11",
        "out-octets": "64721394",
        "out-unicast-packets": "105876"
    }
}

split#

processors:
  # processor name
  sample-processor:
    # processor type
    event-strings:
      value-names:
        - ".*"
      transforms:
        # strings function name
        - split:
            on: "name"
            split-on: "/"
            join-with: "_"
            ignore-first: 1
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "/srl_nokia-interfaces:interface/statistics/carrier-transitions": "1",
        "/srl_nokia-interfaces:interface/statistics/in-broadcast-packets": "3797",
        "/srl_nokia-interfaces:interface/statistics/in-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-fcs-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-multicast-packets": "288033",
        "/srl_nokia-interfaces:interface/statistics/in-octets": "65382630",
        "/srl_nokia-interfaces:interface/statistics/in-unicast-packets": "107154",
        "/srl_nokia-interfaces:interface/statistics/out-broadcast-packets": "614",
        "/srl_nokia-interfaces:interface/statistics/out-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/out-multicast-packets": "11",
        "/srl_nokia-interfaces:interface/statistics/out-octets": "64721394",
        "/srl_nokia-interfaces:interface/statistics/out-unicast-packets": "105876"
    }
}
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "statistics_carrier-transitions": "1",
        "statistics_in-broadcast-packets": "3797",
        "statistics_in-error-packets": "0",
        "statistics_in-fcs-error-packets": "0",
        "statistics_in-multicast-packets": "288033",
        "statistics_in-octets": "65382630",
        "statistics_in-unicast-packets": "107154",
        "statistics_out-broadcast-packets": "614",
        "statistics_out-error-packets": "0",
        "statistics_out-multicast-packets": "11",
        "statistics_out-octets": "64721394",
        "statistics_out-unicast-packets": "105876"
    }
}

multiple transforms#

processors:
  # processor name
  sample-processor:
    # processor type
    event-strings:
      value-names:
        - ".*"
      transforms:
        # strings function name
        - path-base:
            apply-on: "name"
        - title:
            apply-on: "name"
        - replace:
            apply-on: "name"
            old: "-"
            new: "_"
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "/srl_nokia-interfaces:interface/statistics/carrier-transitions": "1",
        "/srl_nokia-interfaces:interface/statistics/in-broadcast-packets": "3797",
        "/srl_nokia-interfaces:interface/statistics/in-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-fcs-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/in-multicast-packets": "288033",
        "/srl_nokia-interfaces:interface/statistics/in-octets": "65382630",
        "/srl_nokia-interfaces:interface/statistics/in-unicast-packets": "107154",
        "/srl_nokia-interfaces:interface/statistics/out-broadcast-packets": "614",
        "/srl_nokia-interfaces:interface/statistics/out-error-packets": "0",
        "/srl_nokia-interfaces:interface/statistics/out-multicast-packets": "11",
        "/srl_nokia-interfaces:interface/statistics/out-octets": "64721394",
        "/srl_nokia-interfaces:interface/statistics/out-unicast-packets": "105876"
    }
}
{
    "name": "default",
    "timestamp": 1607291271894072397,
    "tags": {
        "interface_name": "mgmt0",
        "source": "172.23.23.2:57400",
        "subscription-name": "default"
    },
    "values": {
        "Carrier_transitions": "1",
        "In_broadcast_packets": "3797",
        "In_error_packets": "0",
        "In_fcs_error_packets": "0",
        "In_multicast_packets": "288033",
        "In_octets": "65382630",
        "In_unicast_packets": "107154",
        "Out_broadcast_packets": "614",
        "Out_error_packets": "0",
        "Out_multicast_packets": "11",
        "Out_octets": "64721394",
        "Out_unicast_packets": "105876"
    }
}
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