Like Prometheus, but for logs.

prometheushacktoberfestgrafanacloudnativeloggingloki

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Christophe Collot f2394355d8 feat(lambda-promtail): add cloudfront log file ingestion support (#9573) ... **What this PR does / why we need it**: This PR enables ingesting logs from Cloudfront log files stored in s3 (batch). The current setup only supports streaming Cloudfront logs through AWS Kinesis, whereas this PR implements the same flow as for VPC Flow logs, Load Balancer logs, and Cloudtrail logs (s3 --> SQS (optional) --> Lambda Promtail --> Loki) **Special notes for your reviewer**: + The Cloudfront log file format is different from the already implemented services, meaning we had to build yet another regex. AWS never bothered making all services follow the same log file naming convention but the "good" thing is that it's now very unlikely they will change it in the future. + The Cloudfront file name does not have any mention of the AWS account or the time of log it contains, it means we have to infer the log type from the filename format instead of finding the exact string "cloudfront" in the filename. This is why in `getLabels`, if no `type` parameter is found in the regex, we use the key corresponding to the name of the matching parser. + I introduced a new `parser` struct to group together several parameters specific to a type of log (and avoid relying too much on map key string matching and / or if statements for specific use cases) + I've been successfully running this code in several AWS environments for days. + I corrected a typo from my previous PR #9497 (wrong PR number in Changelog.md) **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` - [x] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) --------- Co-authored-by: Michel Hollands <42814411+MichelHollands@users.noreply.github.com>		3 years ago
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aws	TOC Sync: Move LogQL and LogCLI files under Query. (#9200)	3 years ago
docker-driver	TOC Sync: Move LogQL and LogCLI files under Query. (#9200)	3 years ago
fluentbit	TOC Sync: Move LogQL and LogCLI files under Query. (#9200)	3 years ago
fluentd	TOC Sync: Move API docs under Reference. (#9203)	3 years ago
k6	Docs: replace `k6 Cloud` mention (#9599)	3 years ago
lambda-promtail	feat(lambda-promtail): add cloudfront log file ingestion support (#9573)	3 years ago
logstash	Fix documentation linter errors (#8229)	3 years ago
promtail	feat(promtail): add CF ClientRequestSource field (#9669)	3 years ago
_index.md	Update _index.md (#9347)	3 years ago