Issues using custom docker templates

Traefik Traefik v1
1

I've been trying to figure out how to use custom docker templates (as described here https://docs.traefik.io/configuration/commons/#override-default-configuration-template), but running into trouble when using the "stock" docker template for v1.7.14 (https://github.com/containous/traefik/blob/v1.7.14/templates/docker.tmpl). Namely, when I try to start traefik with that template verbatim, I get this errror:

traefik_1  | time="2019-08-29T18:58:33Z" level=error msg="template: /etc/traefik/docker.tmpl:6: function \"getCircuitBreaker\" not defined"
traefik_1  | time="2019-08-29T18:58:33Z" level=debug msg="Received nil configuration from provider \"docker\", skipping."

Seems that the default template references some undefined function. Is there another base template I should be using, or an example of a traefik setup which provides a working docker template?

Thanks!

2

Hello,

Try to add this in your configuration:

[docker]
  templateVersion = 2
  # ...

https://docs.traefik.io/v1.7/configuration/backends/docker/

[docker]
# Override template version
# For advanced users :)
#
# Optional
# - "1": previous template version (must be used only with older custom templates, see "filename")
# - "2": current template version (must be used to force template version when "filename" is used)
#
# templateVersion = 2
1 Like
3

Thanks, that did it! FWIW I think the documentation could use a little clarification on this feature, since both version numbers claim they must be used and it's not clear which is the default value.

Separate question: do you know if Traefik 2 has a feature similar to templates which would allow for e.g. specifying default security headers?

4

Traefik v2 don't have any template.

The new design allow to do lot more thing than the v1 without using template.

The middleware can be define in a provider and applying on multiple routers.

1 Like