Like Prometheus, but for logs.

prometheushacktoberfestgrafanacloudnativeloggingloki

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Ashwanth f9fc1df4c0 logfmt: add --strict flag to enable strict parsing, perform nostrict parsing by default (#9626) ... **What this PR does / why we need it**: Introduces `--strict` flag for logfmt parser to enable strict parsing. With strict parsing enabled, logfmt parser stops scanning the log line and returns early with an error if it encounters any poorly formatted key=value pair. This pr updates the parser to perform non-strict parsing by default where it skips over the invalid tokens. This offers the flexibility to parse semi-structured log lines. Also adds `--keep-empty` flag to retain standalone keys(with empty value) as labels with value set to empty string **Special notes for your reviewer**: **Checklist** - [X] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [X] Documentation added - [X] Tests updated - [x] `CHANGELOG.md` updated - [x] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` --------- Co-authored-by: Michel Hollands <42814411+MichelHollands@users.noreply.github.com>		2 years ago
..
jsonexpr	JSON label extraction field validation expression overly strict (#6372)	3 years ago
logfmt	logfmt: add --strict flag to enable strict parsing, perform nostrict parsing by default (#9626)	2 years ago
pattern	Upgrade `golangci-lint` and fix linting errors (#9601)	2 years ago
distinct.go	LogQL: Introduce `distinct` (#8662)	2 years ago
distinct_test.go	logql/log tests: use abstractions over labels (#9532)	2 years ago
drop_labels.go	Upgrade `golangci-lint` and fix linting errors (#9601)	2 years ago
drop_labels_test.go	Add keep stage to LogQL (#9693)	2 years ago
error.go	Loki/Promtail: Client Refactor (#3623)	4 years ago
filter.go	Regex line/label filters return original regex when `String` is called (#9584)	2 years ago
filter_test.go	Regex line/label filters return original regex when `String` is called (#9584)	2 years ago
fmt.go	Fix date template function with epoch times (#8886)	2 years ago
fmt_test.go	Add handling of timezones in unixToTime tests (#9707)	2 years ago
ip.go	Changes from linter (#8769)	2 years ago
ip_test.go	logql/log tests: use abstractions over labels (#9532)	2 years ago
keep_labels.go	Add keep stage to LogQL (#9693)	2 years ago
keep_labels_test.go	Add keep stage to LogQL (#9693)	2 years ago
label_extraction_expr.go	chore: Cleanup label extraction expression (#8596)	2 years ago
label_filter.go	fix to-string for noop label filters (#8799)	2 years ago
label_filter_test.go	logql/log tests: use abstractions over labels (#9532)	2 years ago
labels.go	Upgrade `golangci-lint` and fix linting errors (#9601)	2 years ago
labels_test.go	logql/log tests: use abstractions over labels (#9532)	2 years ago
metrics_extraction.go	Short circuit parsing when label matchers are present (#8890)	2 years ago
metrics_extraction_test.go	logfmt: add --strict flag to enable strict parsing, perform nostrict parsing by default (#9626)	2 years ago
parser.go	logfmt: add --strict flag to enable strict parsing, perform nostrict parsing by default (#9626)	2 years ago
parser_hints.go	logfmt: add --strict flag to enable strict parsing, perform nostrict parsing by default (#9626)	2 years ago
parser_hints_test.go	logql/log tests: use abstractions over labels (#9532)	2 years ago
parser_test.go	logfmt: add --strict flag to enable strict parsing, perform nostrict parsing by default (#9626)	2 years ago
pipeline.go	Short circuit parsing when label matchers are present (#8890)	2 years ago
pipeline_test.go	logfmt: add --strict flag to enable strict parsing, perform nostrict parsing by default (#9626)	2 years ago
util.go	Improve the JSON parser performance. (#7723)	2 years ago
util_test.go	Fixes bad initialization for uniqueString (#6432)	3 years ago