Traefik logs: Unable to fetch config data for pangolin api #1658

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MrUnknownDE · 2026-04-05T19:38:38+02:00

MrUnknownDE commented

2026-04-05 19:38:38 +02:00

Originally created by @notc137 on 3/31/2025

Just installed pangolin today and have run into this issue twice sadly. First time it occured I was working on setting up geoip blocking plugin in traefik, after rebooting the docker stack, I had gotten the following error

{"level":"error","providerName":"http","error":"cannot fetch configuration data: do fetch request: Get \"http://pangolin:3001/api/v1/traefik-config\": dial tcp: lookup pangolin on 127.0.0.11:53: read udp 127.0.0.1:40988->127.0.0.11:53: read: connection refused","time":"2025-03-31T02:18:12Z","message":"Provider error, retrying in 6.533049333s"}

Reverted all my changes and still was unable to recover from this error. Chalked it up to I messed something up but since it was pretty much brand new instance I just rebuilt from scratch.

Second time this same error has occurred was just now. Got alerted one of my sites went down, went to investigate and could not reach the site. Looking through logs everything was fine, was able to get the pangolin admin page. After some digging, crowdsec seemed to have banned my public IP for whatever reason (still getting around to fully mess with and configure it). I whitelisted my IP in crowdsec and rebooted my entire docker stack and now I am getting hte same exact error in traefik.

I checked all the logs in crowdsec and pangolin and everything is up and running as expected. Its just traefik.

Update:

when I run the following:
docker compose down && docker system prune -af && docker compose up -d

everything starts to work again with no issues.

I noticed another part of the log file had an issue earlier up that only occurs on reboot. It is the following
{"level":"error","error":{"Op":"Get","URL":"[https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0","Err":%7B%7D%7D,"method":"GET","url":"https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0","time":"2025-03-30T11:53:41Z","message":"Request](https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0%22,%22Err%22:%7B%7D%7D,%22method%22:%22GET%22,%22url%22:%22https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0%22,%22time%22:%222025-03-30T11:53:41Z%22,%22message%22:%22Request) failed"} traefik | {"level":"error","plugins":["badger","crowdsec"],"error":"unable to set up plugins environment: unable to download plugin github.com/fosrl/badger: failed to call service: Get "https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0/": GET https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0 giving up after 4 attempt(s): Get "https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)","time":"2025-03-30T11:53:41Z","message":"Plugins are disabled because an error hasoccurred."}`

*Originally created by @notc137 on 3/31/2025* Just installed pangolin today and have run into this issue twice sadly. First time it occured I was working on setting up geoip blocking plugin in traefik, after rebooting the docker stack, I had gotten the following error `{"level":"error","providerName":"http","error":"cannot fetch configuration data: do fetch request: Get \"http://pangolin:3001/api/v1/traefik-config\": dial tcp: lookup pangolin on 127.0.0.11:53: read udp 127.0.0.1:40988->127.0.0.11:53: read: connection refused","time":"2025-03-31T02:18:12Z","message":"Provider error, retrying in 6.533049333s"}` Reverted all my changes and still was unable to recover from this error. Chalked it up to I messed something up but since it was pretty much brand new instance I just rebuilt from scratch. Second time this same error has occurred was just now. Got alerted one of my sites went down, went to investigate and could not reach the site. Looking through logs everything was fine, was able to get the pangolin admin page. After some digging, crowdsec seemed to have banned my public IP for whatever reason (still getting around to fully mess with and configure it). I whitelisted my IP in crowdsec and rebooted my entire docker stack and now I am getting hte same exact error in traefik. I checked all the logs in crowdsec and pangolin and everything is up and running as expected. Its just traefik. Update: when I run the following: `docker compose down && docker system prune -af && docker compose up -d` everything starts to work again with no issues. I noticed another part of the log file had an issue earlier up that only occurs on reboot. It is the following `{"level":"error","error":{"Op":"Get","URL":"[https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0","Err":%7B%7D%7D,"method":"GET","url":"https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0","time":"2025-03-30T11:53:41Z","message":"Request](https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0%22,%22Err%22:%7B%7D%7D,%22method%22:%22GET%22,%22url%22:%22https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0%22,%22time%22:%222025-03-30T11:53:41Z%22,%22message%22:%22Request) failed"} traefik | {"level":"error","plugins":["badger","crowdsec"],"error":"unable to set up plugins environment: unable to download plugin github.com/fosrl/badger: failed to call service: Get "https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0/": GET https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0 giving up after 4 attempt(s): Get "https://plugins.traefik.io/public/download/github.com/fosrl/badger/v1.0.0/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)","time":"2025-03-30T11:53:41Z","message":"Plugins are disabled because an error has`occurred."}`

MrUnknownDE closed this issue

2026-04-05 19:38:38 +02:00

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Reference: github/pangolin#1658