Like Prometheus, but for logs.

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Justin Burnham 97c7d7ca3c LogQL: add the `default` sprig template function to logql label/line formatter (#6163) ... * add the `default` sprig template function to logql label/line formatter With the `default` sprig template function, we will be able to make it easier to output a default value if the source string is otherwise empty. Useful for json fields that can be missing, like HTTP headers in a log line that aren't required as in the following: ``` {job="access_log"} | json | line_format `{{.http_request_headers_x_forwarded_for | default "-"}}` ``` Previously this could only be done (that I found) with the much more verbose ``` {{regexReplaceAllLiteral "^$" .http_request_headers_x_forwarded_for "-"}} ``` * update changelog entry * add pr number * enhance docs * Update docs/sources/logql/template_functions.md Co-authored-by: Kaviraj Kanagaraj <kavirajkanagaraj@gmail.com> * Update docs/sources/logql/template_functions.md Co-authored-by: Vladyslav Diachenko <82767850+vlad-diachenko@users.noreply.github.com> Co-authored-by: Kaviraj Kanagaraj <kavirajkanagaraj@gmail.com> Co-authored-by: Owen Diehl <ow.diehl@gmail.com> Co-authored-by: Vladyslav Diachenko <82767850+vlad-diachenko@users.noreply.github.com>		4 years ago
..
canary	Refactoring of the Loki storage (#5833)	4 years ago
chunkenc	TSDB shipper + WAL (#6049)	4 years ago
configs	…
distributor	Remove unused grpc health check endpoints (#6113)	4 years ago
ingester	Loki: When processing logs during tailing, don't reuse the query pipeline (#6152)	4 years ago
iter	`metrics.go` support for metadata queries(labels and series) (#5971)	4 years ago
logcli	specify logcli authorization header by flag (#6164)	4 years ago
loghttp	Assert that push values tuples consist of string values (#5685)	4 years ago
logproto	Ensure proto definitions are formatted [2/2] (#6000)	4 years ago
logql	LogQL: add the `default` sprig template function to logql label/line formatter (#6163)	4 years ago
logqlmodel	`metrics.go` support for metadata queries(labels and series) (#5971)	4 years ago
loki	Feat: add Baidu Cloud BOS as storage backends for Loki #4788 (#5848)	4 years ago
lokifrontend	Ensure proto definitions are formatted [2/2] (#6000)	4 years ago
prom1/storage/metric	…
querier	Removed double space in Log (#6166)	4 years ago
ruler	Feat: add Baidu Cloud BOS as storage backends for Loki #4788 (#5848)	4 years ago
runtime	…
scheduler	Ensure proto definitions are formatted [2/2] (#6000)	4 years ago
storage	tsdb query fixes (#6142)	4 years ago
tracing	…
usagestats	ignores reporting cancellations as errors in the usage-reporter module (#6058)	4 years ago
util	TSDB shipper + WAL (#6049)	4 years ago
validation	Loki: Add a configurable ability to fudge incoming timestamps for guaranteed query sort order when receiving entries for the same stream that have duplicate timestamps. (#6042)	4 years ago