Edge Delta Conditional Group Processor

The Edge Delta conditional group processor sequences processors under a condition, allowing for branching processing logic.

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Overview

The conditional group processor groups existing processors and executes them in sequence only if a condition is met. This is different to enabling individual conditions on each processor and is a method for branching the processing logic. You might use this approach if a required condition for a second processor would be removed by a preceding processor.

Configuration

To configure this processor, drag existing processors into it and configure the parent condition. You can order the processors in the execution order. In this example, the extract metric and aggregate metric processors execute on data items where the level attribute is Emergency.

This configuration generates the following YAML:

- name: kubernetes_input_jt1iw_multiprocessor
  type: sequence
  processors:
  - type: sequence
    metadata: '{"id":"KhP8KO88Kvhitx9aN_3pQ","type":"sequence","name":"Conditional
      Group"}'
    condition: attributes["level"] == "Emergency"
    processors:
    - type: extract_metric
      metadata: '{"id":"_rK4ucX4G8oDcrXWwXh2r","type":"extract_metric","name":"Extract
        Metric"}'
      extract_metric_rules:
      - name: status_code
        description: A count of each unique status code
        unit: "1"
        gauge:
          value: attributes["status"]
    - type: aggregate_metric
      metadata: '{"id":"NoQMsANzEU7ltYMb5r1G0","type":"aggregate_metric","name":"Aggregate
        Metric"}'
      data_types:
      - metric
      aggregate_metric_rules:
      - name: Count per status code
        conditions:
        - attributes["response_time_ms"] > 2500
        interval: 1m0s
        aggregation_type: count

Options

condition

The condition parameter contains a conditional phrase of an OTTL statement. It restricts operation of the processor to only data items where the condition is met. Those data items that do not match the condition are passed without processing. You configure it in the interface and an OTTL condition is generated. It is optional.

Important: All conditions must be written on a single line in YAML. Multi-line conditions are not supported.

Comparison Operators

Operator Name Description Example
== Equal to Returns true if both values are exactly the same attributes["status"] == "OK"
!= Not equal to Returns true if the values are not the same attributes["level"] != "debug"
> Greater than Returns true if the left value is greater than the right attributes["duration_ms"] > 1000
>= Greater than or equal Returns true if the left value is greater than or equal to the right attributes["score"] >= 90
< Less than Returns true if the left value is less than the right attributes["load"] < 0.75
<= Less than or equal Returns true if the left value is less than or equal to the right attributes["retries"] <= 3
matches Regex match Returns true if the string matches a regular expression (generates IsMatch function) IsMatch(attributes["name"], ".*\\.log$")

Logical Operators

Important: Use lowercase and, or, not - uppercase operators will cause errors!

Operator Description Example
and Both conditions must be true attributes["level"] == "ERROR" and attributes["status"] >= 500
or At least one condition must be true attributes["log_type"] == "TRAFFIC" or attributes["log_type"] == "THREAT"
not Negates the condition not regex_match(attributes["path"], "^/health")

Functions

Function Description Example
regex_match Returns true if string matches the pattern regex_match(attributes["message"], "ERROR\|FATAL")
IsMatch Alternative regex function (UI generates this from “matches” operator) IsMatch(attributes["name"], ".*\\.log$")

Field Existence Checks

Check Description Example
!= nil Field exists (not null) attributes["user_id"] != nil
== nil Field doesn’t exist attributes["optional_field"] == nil
!= "" Field is not empty string attributes["message"] != ""

Common Examples

- name: _multiprocessor
  type: sequence
  processors:
  - type: <processor type>
    # Simple equality check
    condition: attributes["request"]["path"] == "/json/view"
    
  - type: <processor type>
    # Multiple values with OR
    condition: attributes["log_type"] == "TRAFFIC" or attributes["log_type"] == "THREAT"
    
  - type: <processor type>
    # Excluding multiple values (NOT equal to multiple values)
    condition: attributes["log_type"] != "TRAFFIC" and attributes["log_type"] != "THREAT"
    
  - type: <processor type>
    # Complex condition with AND/OR/NOT
    condition: (attributes["level"] == "ERROR" or attributes["level"] == "FATAL") and attributes["env"] != "test"
    
  - type: <processor type>
    # Field existence and value check
    condition: attributes["user_id"] != nil and attributes["user_id"] != ""
    
  - type: <processor type>
    # Regex matching using regex_match
    condition: regex_match(attributes["path"], "^/api/") and not regex_match(attributes["path"], "^/api/health")
    
  - type: <processor type>
    # Regex matching using IsMatch
    condition: IsMatch(attributes["message"], "ERROR|WARNING") and attributes["env"] == "production"

Common Mistakes to Avoid

# WRONG - Cannot use OR/AND with values directly
condition: attributes["log_type"] != "TRAFFIC" OR "THREAT"

# CORRECT - Must repeat the full comparison
condition: attributes["log_type"] != "TRAFFIC" and attributes["log_type"] != "THREAT"

# WRONG - Uppercase operators
condition: attributes["status"] == "error" AND attributes["level"] == "critical"

# CORRECT - Lowercase operators
condition: attributes["status"] == "error" and attributes["level"] == "critical"

# WRONG - Multi-line conditions
condition: |
  attributes["level"] == "ERROR" and 
  attributes["status"] >= 500  

# CORRECT - Single line (even if long)
condition: attributes["level"] == "ERROR" and attributes["status"] >= 500

processors

The processors parameter specifies the processors that are child objects of the multiprocessor or a conditional group processor. They define a processor and all its required parameters. You define it by dragging existing processors onto the Conditional Group. A processors parameter is required for a conditional group processor.

It is defined in YAML as follows:

- name: multiprocessor
  type: sequence
  processors:
  - type: sequence
    metadata: '{"id":"KhP8KO88Kvhitx9aN_3pQ","type":"sequence","name":"Conditional
      Group"}'
    condition: <condition>
    processors:
    - type: <processor type>
      metadata: '<processor metadata>'
      <processor configuration>:
    - type: <processor type>
      metadata: '<processor metadata>'
      <processor configuration>:

See Also