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Docs: Troubleshooting help for Docker Swarm labels #4751

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May 3, 2019
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Docs: Troubleshooting help for Docker Swarm labels #4751

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Troubleshooting help for Docker Swarm labels
gregberns Apr 9, 2019
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review.
ldez Apr 30, 2019
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Merge branch 'v1.7' into v1.7
gregberns May 1, 2019
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14 changes: 14 additions & 0 deletions docs/configuration/backends/docker.md
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Expand Up @@ -257,6 +257,20 @@ services:
traefik.docker.network: traefik
```

Required labels:

- `traefik.frontend.rule`
- `traefik.port` - Without this the debug logs will show this service is deliberately filtered out.
- `traefik.docker.network` - Without this a 504 may occur.

#### Troubleshooting

If service doesn't show up in the dashboard, check the debug logs to see if the port is missing:
`Filtering container without port, <SERVICE_NAME>: port label is missing, ...')`

If `504 Gateway Timeout` occurs and there are networks used, ensure that `traefik.docker.network` is defined.
The complete name is required, meaning if the network is internal the name needs to be `<project_name>_<network_name>`.

### Using Docker Compose

If you are intending to use only Docker Compose commands (e.g. `docker-compose up --scale whoami=2 -d`), labels should be under your service, otherwise they will be ignored.
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