Marathon SD assumes all applications have a port.

[rdacquisto]

The following line is throwing a panic:

prometheus/retrieval/discovery/marathon/marathon.go

Line 229 in b5bfb50

return fmt.Sprintf("%s:%d", task.Host, task.Ports[0])

This is because task.Ports[0] assumes a length greater than 0, but the marathon configuration for the app is as follows:

  "portDefinitions": [
  ],

There appears to be a bad assumption that all apps will have ports.

The app that is causing this error is marathon-lb.

The work around is to add a random port definition, but this isn't ideal.

[fabxc]

This is fixed in https://github.com/prometheus/prometheus/releases/tag/0.19.3

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.