netdata/netdata

pattern: logfmt

inject:
  - key: SIMPLE_INJECTION
    value: "An unset variable looks like '${this}', while the value of KEY2 is '${KEY2}'"

rewrite:
  - key: INJECTED
    value: "${KEY1} - ${KEY2}"
    inject: yes
    stop: no

  - key: INJECTED
    match: '^value01'
    value: "Key INJECTED had value '${INJECTED}' and now has this, but only on the first row of the log."

  - key: INJECTED
    not_empty: "${KEY4}"
    value: "KEY4 has the value '${KEY4}'; it is not empty, so INJECTED has been rewritten."

  - key: INJECTED
    match: '^KEY4 has the value'
    value: "This value should not appear in the logs, because the previous one matched and stopped the pipeline."

  - key: ANOTHER_INJECTION
    value: "${KEY1} - ${KEY2} - ${INJECTED} - should not work because inject is not true amd ANOTHER_INJECTION is not in the log file."

  - key: YET_ANOTHER_INJECTION
    value: "${KEY1} - ${KEY2} - ${INJECTED} - this should work because inject is yes"
    inject: yes

  - key: SIMPLE_INJECTION
    match: "KEY2 is 'value32'"
    value: "" # empty, so SIMPLE_INJECTION should not be available on row 3