Quoting issues in example config YAML

[skoenig]

The docs/sample-config.yaml is not usable as it is currently. Issues arises due to doublequote-quoted strings in the YAML that contain other double-quotes, leading to parsing errors.

When attempting to start the adapter with the command:

./adapter --config=docs/sample-config.yaml

The following error is encountered:

I0506 11:35:38.062439 3062873 adapter.go:113] successfully using in-cluster auth
F0506 11:35:38.062573 3062873 adapter.go:340] unable to load metrics discovery config: unable to load metrics discovery configuration: unable to parse metrics discovery config: yaml: line 54: did not find expected key

Additional details from yamlfix:

ruyaml.parser.ParserError: while parsing a block mapping
  in "<unicode string>", line 13, column 3:
    - seriesQuery: '{__name__=~"^conta ...
      ^ (line: 13)
expected <block end>, but found '<scalar>'
  in "<unicode string>", line 30, column 70:
     ... {<<.LabelMatchers>>,container!="POD"}[2m])) by (<<.GroupBy>>)"
                                         ^ (line: 30)

Seems like there are multiple occasions of those quoting issue in the values for metricsQuery, for example here:

prometheus-adapter/docs/sample-config.yaml

Line 30 in 01919d0

metricsQuery: "sum(rate(<<.Series>>{<<.LabelMatchers>>,container!="POD"}[2m])) by (<<.GroupBy>>)"

[k8s-ci-robot]

This issue is currently awaiting triage.

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