traefik.toml constraints error: Expected map but found 'string'.

[calvinmorrow]

Using the containous/traefik:v1.0.0-rc2 docker image against a consulCatalog backend:

traefik.toml snippet:

[consulCatalog]
constraints = ["tag==foo"]

Errors with:
2016/06/10 15:20:16 Error reading TOML config file /etc/traefik/traefik.toml : Type mismatch for 'main.TraefikConfiguration.ConsulCatalog': Type mismatch for 'provider.ConsulCatalog.Constraints': Type mismatch for types.Constraint. Expected map but found 'string'.

Using the following command line option works:
--consulCatalog.constraints=tag==foo

[emilevauge]

Hi @calvinmorrow
It seems there is an issue with toml documentation on constraints sorry.

[[consulCatalog.constraints]]
  key = "tag==foo"

should work.
/cc @samber

[tiagostutz]

Well, I trying to achieve this with docker, but didn't work. Using global constraint works, but the configuration had to be slightly different:

[[constraints]]  
  key = "tag"  
  mustmatch = true  
  regex = "app"  

If I put just key = "tag==foo" then the Constraints object on Global configuration will be:
"Constraints":[{"Key":"tag==foo","MustMatch":false,"Regex":""}]; it isn't splitting the string and putting each part on its respective attribute.

Putting as I suggest above will fix it, turning the Constraints correctly into "Constraints":[{"Key":"tag","MustMatch":true,"Regex":"foo"}]

Also, I'm confused with the correct syntax. In #481 it suggests the following syntax, which doesn't work:

[docker]
  endpoint = "unix:///var/run/docker.sock"
  constraints = ["tag==api", "tag==he*ld"]

Is the syntax for this configuration already defined as a consensus?

[emilevauge]

Hi @tiagostutz, there is also an issue on toml parsing with constraints. Constraints will fully supported in 1.1.