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Pablo 89996c9714 Promtail WAL support: Implement reader side (#8302) ... **What this PR does / why we need it**: This PR is the second in a series that will implement WAL support into Promtail. The main objective of this PR is implement the reader side of WAL. That is, using the previously instantiated `client.Manager` to somehow read entries from the WAL instead of receiving them from a channel. **Pending work**: - [x] Implement mechanism so that `WriteTo` targets of each `wal.Watcher` can cleanup un-used series - [x] Write a full fledged test-case that tests a WAL enabled Promtail (maybe in a follow up) **Which issue(s) this PR fixes**: Part of #8197 **Special notes for your reviewer**: The line count might be big since this PR implements two fully fledged test cases of Promtail with WAL enabled. **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [ ] Tests updated - [ ] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md`		3 years ago
..
entries.go	Changes from linter (#8769)	3 years ago
entries_test.go	Changes from linter (#8769)	3 years ago
remotewrite_server.go	Promtail WAL support: Implement reader side (#8302)	3 years ago