Migrating from Nginx to Kong 3.0 Improves API Observability by 40%
Migrate Nginx configs to Kong 3.0 and enable observability plugins.
Enable opentelemetry, prometheus, and http‑log plugins on all Kong APIs and validate routing with DNS weighting.
Summary
A team with 120+ APIs routed through Nginx faced disjointed logging, lack of native metrics, manual instrumentation, and trace gaps, leading to a 47‑minute MTTR.
They chose Kong 3.0 because it offers native observability plugins (opentelemetry, prometheus, http‑log), OpenResty compatibility for minimal config changes, and <2 ms added latency.
The migration involved auditing 120+ routes, converting 18 custom Lua scripts to plugins, staging validation with traffic shadowing, and rolling out APIs in batches of ten using DNS weighting.
Post‑migration, the observability score rose from 62/100 to 87/100, MTTR dropped to 28 minutes, trace completeness improved to 99%, and log parsing time fell to near zero.
Rate limiting and authentication plugins replaced 12 custom Lua scripts, cutting the config footprint by 35%.
A plugin conflict between opentelemetry and prometheus was resolved by upgrading to Kong 3.0.1.
The team also reduced shadowing overhead by sampling 10% of traffic instead of 100%.
Overall, migrating to Kong 3.0 delivered a 40% boost in API observability and a net win for the organization.
Key changes
- Kong 3.0 provides native opentelemetry, prometheus, and http‑log plugins
- OpenResty compatibility allows minimal config changes
- Observability score improved from 62/100 to 87/100
- MTTR dropped from 47 to 28 minutes
- Trace completeness rose from 68% to 99%
- Log parsing time reduced from 12 minutes to near zero
- Rate limiting and auth plugins replaced 12 custom Lua scripts, reducing footprint by 35%
- Plugin conflict resolved by upgrading to Kong 3.0.1