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Take note of TLS limitation for TCP connections #12373

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4 changes: 4 additions & 0 deletions config/containers/logging/gelf.md
Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,10 @@ The `gelf` logging driver supports the following options:
| `env` | optional | Applies when starting the Docker daemon. A comma-separated list of logging-related environment variables this daemon accepts. Adds additional key on the `extra` fields, prefixed by an underscore (`_`). Used for advanced [log tag options](log_tags.md). | `--log-opt env=os,customer` |
| `env-regex` | optional | Similar to and compatible with `env`. A regular expression to match logging-related environment variables. Used for advanced [log tag options](log_tags.md). | `--log-opt env-regex=^(os|customer)` |

> **Note**
>
> The `gelf` driver does not support TLS for TCP connections. Messages sent to TLS-protected inputs can silently fail.

### Examples

This example configures the container to use the GELF server running at
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