How to identify requests as part of an end-to-end tracing strategy

blog20240820-01.cfg

unique-id-format "%[uuid]"
unique-id-header X-Correlation-ID

blog20240820-02.cfg

http-after-response set-header X-Correlation-ID %[unique-id]

blog20240820-03.cfg

 log-format "$HAPROXY_HTTP_LOG_FMT %[unique-id]"

blog20240820-04.cfg

sudo apt-get install hapee-2.9r1-lb-fingerprint-ssl

blog20240820-05.cfg

global
  module-path /opt/hapee-2.9/modules
  module-load hapee-lb-fingerprint-ssl.so

blog20240820-06.cfg

frontend mysite 
  http-request set-var(txn.client_fingerprint) req.fingerprint_ssl.ja3_hash(EL_EXCLUDE:41,EL_SORT)
  log-format "$HAPROXY_HTTP_LOG_FMT %[var(txn.client_fingerprint)]"

blog20240820-07.cfg

  log-format-sd "%{+Q,+E}o[request@58750 host=%[var(txn.host)] referer=%[var(txn.referer)] user_agent=%[var(txn.user_agent)]][custom@58750 client_fingerprint=%[var(txn.client_fingerprint)]]"

blog20240820-08.cfg

  log-format "$HAPROXY_HTTP_LOG_FMT %[unique-id] %[var(txn.client_fingerprint)]"

blog20240820-09.cfg

  log-format-sd "%{+Q,+E}o[request@58750 host=%[var(txn.host)] referer=%[var(txn.referer)] user_agent=%[var(txn.user_agent)]][custom@58750 correlation_id=%[unique-id] client_fingerprint=%[var(txn.client_fingerprint)]]"

blog20240820-10.cfg

unique-id-format "%[uuid]"
unique-id-header X-Correlation-ID
http-after-response set-header X-Correlation-ID %[unique-id]
log-format-sd "%{+Q,+E}o[request@58750 host=%[var(txn.host)] referer=%[var(txn.referer)] user_agent=%[var(txn.user_agent)]][custom@58750 correlation_id=%[unique-id] client_fingerprint=%[var(txn.client_fingerprint)]]"