chore(deps): Bump github.com/prometheus/client_golang from 1.18.0 to 1.19.0

[dependabot]

Bumps github.com/prometheus/client_golang from 1.18.0 to 1.19.0.

Release notes

Sourced from github.com/prometheus/client_golang's releases.

v1.19.0

What's Changed

The module prometheus/common v0.48.0 introduced an incompatibility when used together with client_golang (See prometheus/client_golang#1448 for more details). If your project uses client_golang and you want to use prometheus/common v0.48.0 or higher, please update client_golang to v1.19.0.

• [CHANGE] Minimum required go version is now 1.20 (we also test client_golang against new 1.22 version). #1445 #1449
• [FEATURE] collectors: Add version collector. #1422 #1427

New Contributors

• @​michurin made their first contribution in prometheus/client_golang#1423
• @​kavu made their first contribution in prometheus/client_golang#1445
• @​ywwg made their first contribution in prometheus/client_golang#1448

Full Changelog: prometheus/client_golang@v1.18.0...v1.19.0

Changelog

Sourced from github.com/prometheus/client_golang's changelog.

1.19.0 / 2023-02-27

The module prometheus/common v0.48.0 introduced an incompatibility when used together with client_golang (See prometheus/client_golang#1448 for more details). If your project uses client_golang and you want to use prometheus/common v0.48.0 or higher, please update client_golang to v1.19.0.

• [CHANGE] Minimum required go version is now 1.20 (we also test client_golang against new 1.22 version). #1445 #1449
• [FEATURE] collectors: Add version collector. #1422 #1427

Commits

• 77d4003 Add 1.19.0 changelog (#1451)
• 14259fa Merge pull request #1448 from ywwg/owilliams/content-negotiation
• 6d03920 deps: bump prometheus/common version
• 353395b Remove support for go 1.19 (#1449)
• 9dd5d2a Merge pull request #1445 from kavu/add_go122_metrics_test
• c906a5e Add support for Go 1.22
• 7ac9036 Merge pull request #1440 from prometheus/dependabot/github_actions/github-act...
• 8c7e30f Merge pull request #1441 from prometheus/dependabot/go_modules/tutorial/whats...
• 08769f8 Bump github.com/prometheus/common in /tutorial/whatsup
• 83d5940 Bump the github-actions group with 2 updates
• Additional commits viewable in compare view

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[powersj]

It looks like https://github.com/prometheus/common/pull/576/files is the upstream change that has unexported some of the format strings. I have the following diff to switch over, however the protobuf tests continue to fail for the prometheus parser. Specifically the TestCases/protobuf_v1 and TestCases/protobuf_v2 tests fail:

diff --git plugins/parsers/prometheus/parser.go plugins/parsers/prometheus/parser.go
index 46884ec3b..62db36a39 100644
--- plugins/parsers/prometheus/parser.go
+++ plugins/parsers/prometheus/parser.go
@@ -30,14 +30,14 @@ func (p *Parser) Parse(data []byte) ([]telegraf.Metric, error) {
 	// Determine the metric transport-type derived from the response header and
 	// create a matching decoder.
 	format := expfmt.ResponseFormat(p.Header)
-	switch format {
-	case expfmt.FmtProtoText:
+	switch format.FormatType() {
+	case expfmt.TypeProtoText:
 		// Make sure we have a finishing newline but no trailing one
 		data = bytes.TrimPrefix(data, []byte("\n"))
 		if !bytes.HasSuffix(data, []byte("\n")) {
 			data = append(data, []byte("\n")...)
 		}
-	case expfmt.FmtUnknown:
+	case expfmt.TypeUnknown:
 		p.Log.Debugf("Unknown format %q... Trying to continue...", p.Header.Get("Content-Type"))
 	}
 	buf := bytes.NewBuffer(data)
diff --git plugins/serializers/prometheus/prometheus.go plugins/serializers/prometheus/prometheus.go
index 215754cb2..e2a7b34e8 100644
--- plugins/serializers/prometheus/prometheus.go
+++ plugins/serializers/prometheus/prometheus.go
@@ -76,7 +76,7 @@ func (s *Serializer) SerializeBatch(metrics []telegraf.Metric) ([]byte, error) {
 
 	var buf bytes.Buffer
 	for _, mf := range coll.GetProto() {
-		enc := expfmt.NewEncoder(&buf, expfmt.FmtText)
+		enc := expfmt.NewEncoder(&buf, expfmt.NewFormat(expfmt.TypeTextPlain))
 		err := enc.Encode(mf)
 		if err != nil {
 			return nil, err

[srebhan]

@powersj there is an underlying issue with the way they decode now. My fix can be found in prometheus/common#616.

[powersj]

@srebhan thanks for figuring that out. Do we want to close this PR then for now and update only once your PR is landed and released? We can tell dependabot to ignore this minor version.

[srebhan]

@powersj yeah I think that would be a good idea.

@dependabot ignore this minor version

[dependabot]

OK, I won't notify you about version 1.19.x again, unless you re-open this PR.