Bug in Algorithm Select

[cliedeman]

Do you want to request a feature or report a bug?

Bug

What did you do?

Upgraded to traefik 16.6.5 from 17.0.rc3

What did you expect to see?

ACME certificates renewing as expected.

What did you see instead?

time="2018-08-24T13:10:46Z" level=error msg="Unable to obtain ACME certificate for domains \"foo.com\" detected thanks to rule \"Host:foo.com\" : unable to generate a certificate for the domains [foo.com]: acme: Error -> One or more domains had a problem:\n[foo.com] invalid KeyType: \n"

Output of traefik version: (What version of Traefik are you using?)

17.0.rc3

What is your environment & configuration (arguments, toml, provider, platform, ...)?

kubernetes helm chart with acme.json config. Single instance
ACME enabled, challenge type: http-01

The issue is related to #3319. In my acme.json my KeyType string was empty (as expected). This should default correctly due to but its somehow getting through to lego causing this log

I think this line should probabably do a check for an empty key and probably panic with a message to the user that the Key Type is missing. I am not sure if it is safe to default to 4096.

As I workaround I manually set the key type to 4096 inside my acme.json.

[ldez]

duplicate of #3468 (comment)

Already fixed by #3733

[cliedeman]

Thanks