Environment variables in traefik.yaml and dynamic.yaml not working

Traefik Traefik v3 (latest)
1

Hi everyone,

I’m having trouble using environment variables in Traefik v3.3 when defining them inside traefik.yaml and dynamic.yaml. I have ensured that the environment variables are correctly set, but they don’t seem to work when referenced in my configuration.

I’ve tried multiple syntax variations for setting a rule like this:
rule: "Host(``)"

Here are some of the syntaxes I’ve attempted:

• {{ env "SERVER_HOST" }}

• %%SERVER_HOST%%

• ${SERVER_HOST}

• {{ env "SERVER_HOST" }}

• (and a few other variations I can’t recall)

Unfortunately, none of these have worked.

Could someone provide guidance on how to correctly use environment variables in Traefik 3.3 configuration files? Any help would be greatly appreciated!

Thanks in advance.

2

Check the doc:

Go Templating only works with dedicated dynamic configuration files. Templating does not work in the Traefik main static configuration file.

{{ env "MY_ENV_VAR" }}

Alternatively you can place your static and dynamic config in docker compose (instead of Traefik config file), there templating usually works.