# Raises an error if we have 2 instances with the same URI
karma.bin-should-fail --config.file karma.yaml
! stdout .
cmp stderr stderr.txt

-- stderr.txt --
level=info msg="Reading configuration file" path=karma.yaml
level=info msg="Version: dev"
level=info msg="Configured Alertmanager source" name=am1 proxy=false readonly=false uri=https://127.0.0.1:9093
level=error msg="Execution failed" error="failed to register Alertmanager 'am2' with URI 'https://127.0.0.1:9093': alertmanager upstream 'am1' already collects from 'https://127.0.0.1:9093'"
-- karma.yaml --
alertmanager:
  servers:
    - name: am1
      uri: https://127.0.0.1:9093
    - name: am2
      uri: https://127.0.0.1:9093
