4.1.11 and above throws error "tally.internal.counter_cardinality" is not a valid metric name

[nitrocode]

error

I noticed we cannot upgrade past 4.1.10 because we get this error in our tests

panic: descriptor Desc{fqName: "tally.internal.counter_cardinality", help: "tally.internal.counter_cardinality gauge", constLabels: {}, variableLabels: [version host instance]} is invalid: "tally.internal.counter_cardinality" is not a valid metric name [recovered]

I noticed some changes in these tags that may be related

v4.1.10...v4.1.11

Is this panic an expected error or a regression?

references

• https://github.com/runatlantis/atlantis/actions/runs/8496376185/job/23273689226?pr=4228
• https://github.com/runatlantis/atlantis/blob/main/server/metrics/scope.go
• https://github.com/runatlantis/atlantis/blob/84f0fff1696a1f9ef70ba9e5d3f167e8eb4e28e8/server/metrics/scope_test.go#L18
• fix(deps): update module github.com/uber-go/tally/v4 to v4.1.16 in go.mod (main) runatlantis/atlantis#4228 (review)

[rbarabas]

Wondering about the same. Disabled cardinality metrics in NewRootScope() in the interim.

[TheCodingChameleon]

Setting the OmitCardinalityMetrics to true and false didn't remove this issue for my project, we have had to stay on v4.1.10

[ptxmac]

Seeing this too, It looks like there's not great test coverage of the prometheus exporter

[ptxmac]

There's a simple test that would have caught this issue: master...ptxmac:tally:test-prom

I used this with git bisect:

2498a0d is the first bad commit

[ptxmac]

Found a workaround / correct way to initialize the root scope:

	tally.NewRootScope(tally.ScopeOptions{
		Prefix:          "prefix",
		Tags:            map[string]string{"env": "dev"},
		CachedReporter:  r,
		Separator:       prometheus.DefaultSeparator,
		SanitizeOptions: &prometheus.DefaultSanitizerOpts,
	}, 1*time.Second)

I guess that does technically make sense, but it's a shame that the default naming for cardinality metrics results in a panic if the correct options are not supplied.

If the default option results in a panic, then it's not really a good default option!