Jaeger v1's web UI has no theme selector — it ships light-only.
v2 (the OTel-Collector-based rewrite, image
`jaegertracing/jaeger`, distinct from v1's `jaegertracing/
all-in-one`) ships a Light / Dark / Auto switcher in the UI nav.
v2 is also the actively-developed line; v1 will be phased out
within ~6-12 months.
Migration is mechanical:
- Image: `jaegertracing/all-in-one:1.76.0` →
`jaegertracing/jaeger:2.17.0`.
- Drop `COLLECTOR_OTLP_ENABLED: 'true'` env — v2 enables OTLP
receivers by default.
- UI port (16686) and OTLP ports (4317 / 4318) are unchanged, so
the collector → jaeger:4317 forwarding pipeline keeps working
without touching `otel-collector.yaml`.
The compose comment is updated to reflect v2's distinct image
name and UI capabilities.
Julien Gautier