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Traefik

Re-deploying

If you ever need to re-deploy the stack, you can use the pc-deploy script.

Make sure you run it as the deploy user so that the proper Docker container registry credentials are passed.

```bash
sudo -Hu deploy pc-deploy core-stacks traefik
```

Troubleshooting

  • Your first line of defense when debugging issues with Traefik is navigating to the Traefik dashboard at https://your-site/dashboard/ where you can see all the routers and services that have been defined. This is helpful when the issue is a configuration issue either in the Traefik command or labels.

  • When you have basic authentication enabled, ensure that the password hash has an appropriate cost setting; 9 or less might make brute forcing easier, while 12 or higher will add significant amounts of CPU load to Traefik, causing page loads to be extremely slow. A setting of 10 is recommended. 

    htpasswd -n -B -C 10 mylogin

  • To debug performance issues in Traefik, you can enable debug mode by adding to the traefik service: --api.debug=true. This enables all the debug endpoints.

curl -u user:passwd https://your-site/debug/pprof/heap -o heap.pprof
curl -u user:passwd https://your-site/debug/pprof/profile -o profile.pprof
curl -u user:passwd https://your-site/debug/pprof/block -o block.pprof
curl -u user:passwd https://your-site/debug/pprof/mutex -o mutex.pprof
curl -u user:passwd https://your-site/debug/pprof/goroutine -o goroutine.pprof

# Install Go
apt install golang
# Install pprof
go install github.com/google/pprof@latest

go tool pprof -top heap.pprof
go tool pprof -top profile.pprof
go tool pprof -top block.pprof
go tool pprof -top mutex.pprof
go tool pprof -top goroutine.pprof