Release v0.28.0-rc.0

[SuperQ]

• [CHANGE] Deprecate and remove api/v1/ Deprecate and remove api/v1/ #2970
• [CHANGE] Remove unused feature flags Remove unused feature flags #3676
• [CHANGE] Newlines in smtp password file are now ignored Add metric for inhibit rules #3681
• [CHANGE] Change compat metrics to counters Change compat metrics to counters #3686
• [CHANGE] Do not register compat metrics in amtool Do not register compat metrics in amtool #3713
• [CHANGE] Remove metrics from compat package Remove metrics from compat package #3714
• [CHANGE] Mark muted alerts #3513: Mark muted alerts #3793
• [FEATURE] Add metric for inhibit rules Add metric for inhibit rules #3681
• [FEATURE] Support UTF-8 label matchers Support UTF-8 label matchers: Add new parser #3453, Support UTF-8 label matchers: Add test for PromQL braces when parsing lists of matchers #3507, Support UTF-8 label matchers: Add more acceptance tests for braces when using amtool #3523, Support UTF-8 label matchers: Add compat package with feature flag and use in amtool #3483, Support UTF-8 label matchers: Use compat package in Alertmanager server #3567, Support UTF-8 label matchers: Remove braces from suggestion #3568, Support UTF-8 label matchers: Update compliance tests #3569, Support UTF-8 label matchers: Do not allow unquoted escape sequences #3571, Support UTF-8 label matchers: unquote should check for invalid UTF-8 code points #3595, Support UTF-8 label matchers: Rename feature flags and make package public #3604, Fix UTF-8 not supported in group_by #3619, Support UTF-8 label matchers: Add metrics to matchers compat package #3658, Support UTF-8 label matchers: Make functions in compat package public #3659, Support UTF-8 label matchers: Add origin to logs in compat #3662, Fix inconsistent defaults in UTF-8 behavior #3668, 3572
• [FEATURE] Add counter to track alerts dropped outside of time_intervals feat: add counter to track alerts dropped outside of time_intervals #3565
• [FEATURE] Add date and tz functions to templates Add date and tz functions to templates #3812
• [FEATURE] Add limits for silences Add limits for silences #3852
• [FEATURE] Add time helpers for templates feat: add time helpers #3863
• [FEATURE] Add auto GOMAXPROCS feat(env): add auto go maxprocs #3837
• [FEATURE] Add auto GOMEMLIMIT feat(env): Add automatic memory limit handling #3895
• [FEATURE] Add Jira receiver integration jira integration #3590
• [ENHANCEMENT] Add the receiver name to notification metrics Add the receiver name to notification metrics #3045
• [ENHANCEMENT] Add the route ID to uuid Add the route ID to uuid #3372
• [ENHANCEMENT] Add duration to the notify success message Add duration to the notify success message #3559
• [ENHANCEMENT] Implement webhook_url_file for discord and msteams feat: implement webhook_url_file for discord and msteams #3555
• [ENHANCEMENT] Add debug logs for muted alerts Add debug logs for muted alerts #3558
• [ENHANCEMENT] API: Allow the Silences API to use their own 400 response API: Allow the Silences API to use their own 400 response #3610
• [ENHANCEMENT] Add summary to msteams notification Add summary to msteams notification #3616
• [ENHANCEMENT] Add context reasons to notifications failed counter Add context reasons to notifications failed counter #3631
• [ENHANCEMENT] Add optional native histogram support to latency metrics feat: add optional native histogram support to latency metrics #3737
• [ENHANCEMENT] Enable setting ThreadId for Telegram notifications Enable setting ThreadId for Telegram notifications #3638
• [ENHANCEMENT] Allow webex roomID from template Allow webex roomID from template #3801
• [BUGFIX] Add missing integrations to notify metrics [FEAT] Add missing integrations to notify metrics #3480
• [BUGFIX] Add missing ttl in pushhover Add missing ttl in pushhover #3474
• [BUGFIX] Fix scheme required for webhook url in amtool How to run the Alert Manager in EDT timezone #3409
• [BUGFIX] Remove duplicate integration from metrics Remove duplicate integration from metrics #3516
• [BUGFIX] Reflect Discord's max length message limits Reflect Discord's max length message limits #3597
• [BUGFIX] Fix nil error in warn logs about incompatible matchers Fix nil error in warn logs about incompatible matchers #3683
• [BUGFIX] Fix a small number of inconsistencies in compat package logging Fix a small number of inconsistencies in compat package logging #3718
• [BUGFIX] Fix log line in featurecontrol Fix log line in featurecontrol #3719
• [BUGFIX] Fix panic in acceptance tests Fix panic in acceptance tests #3592
• [BUGFIX] Fix flaky test TestClusterJoinAndReconnect/TestTLSConnection Fix flaky test TestClusterJoinAndReconnect/TestTLSConnection #3722
• [BUGFIX] Fix crash on errors when url_file is used notify/webhook: Fix crash on errors when url_file is used (#3798) #3800
• [BUGFIX] Fix race condition in dispatch.go Fix race condition in dispatch.go #3826
• [BUGFIX] Fix race conditions in the memory alerts store Fix race conditions in the memory alerts store #3648
• [BUGFIX] Hide config.SecretURL when the URL is incorrect. Fix: Hide config.SecretURL when the URL is incorrect. #3887
• [BUGFIX] Fix invalid silence causes incomplete updates Fix invalid silence causes incomplete updates #3898
• [BUGFIX] Fix leaking of Silences matcherCache entries bugfix: fix leaking of Silences matcherCache entries #3930
• [BUGFIX] Close SMTP submission correctly to handle errors fix: close SMTP submission correctly to handle errors #4006

[grobinson-grafana]

It would be great if we could get #3797 (Issue #3513) into this release, as it completes a currently incomplete feature (marking muted alerts) that is in main and also in this RC.

[TheMeier]

Any chance at all this could get a consideration for the next version #3600 ?

[gotjosh]

@SuperQ George and I went through a quick list of PRs that we can to get merged before we cut this off:

#3827
#4072
#4007
#3560
#4024
#3600

We'll attempt to get them merged by tomorrow and cut the release.

[sathieu]

Why #3732 is not in the list?

[grobinson-grafana]

Why #3732 is not in the list?

I can see it is in the branch, it might have been missed by accident. I think the list was written by hand?

[Lddeiva]

When will this release be available to test the MS Teams v2 receiver?

[gotjosh]

@SuperQ I have wordsmithed the changelog a bit to include more detail with this the changelog is now the following:

* [CHANGE] Templating errors in the SNS integration now return an error. #3531 #3879
* [FEATURE] Add a new Microsoft Teams integration based on Flows #4024
* [FEATURE] Add a new Rocket.Chat integration #3600
* [FEATURE] Add a new Jira integration #3590 #3931
* [FEATURE] Add support for `GOMEMLIMIT`, enable it via the feature flag `--enable-feature=auto-gomemlimit`. #3895
* [FEATURE] Add support for `GOMAXPROCS`, enable it via the feature flag `--enable-feature=auto-gomaxprocs`. #3837
* [FEATURE] Add support for limits of silences including the maximum number of active and pending silences, and the maximum size per silence (in bytes). You can use the flags `--silences.max-silences` and `--silences.max-silence-size-bytes` to set them accordingly #3852 #3862 #3866 #3885 #3886 #3877
* [FEATURE] Muted alerts now show whether they are suppressed or not in the `/api/v2/alerts` endpoint. #3793 #3797 #3792
* [ENHANCEMENT] Add support for `content` in the Discord integration. The field supports templating. #4007
* [ENHANCEMENT] Only cycle a silence if the update is successful - should improve latency on both `GET api/v2/alerts` and `POST api/v2/alerts` API endpoint. #3961
* [ENHANCEMENT] Add image source label to Dockerfile. To get changelogs shown when using Renovate #4062
* [ENHANCEMENT] Build using go 1.23 #4071
* [ENHANCEMENT] Support setting a global SMTP TLS configuration. #3732
* [ENHANCEMENT] The setting `room_id` in the WebEx integration can now be templated to allow for dynamic room IDs. #3801
* [ENHANCEMENT] Enable setting `message_thread_id` for the Telegram integration. #3638
* [ENHANCEMENT] Support the `since` and `humanizeDuration` functions to templates. This means users can now format time to more human-readable text. #3863
* [ENHANCEMENT] Support the `date` and `tz` functions to templates. This means users can now format time in a specified format and also change the timezone to their specific locale. #3812
* [ENHANCEMENT] Latency metrics now support native histograms. #3737
* [BUGFIX] Fix the SMTP integration not correctly closing an SMTP submission, which may lead to unsuccessful dispatches being marked as successful. #4006
* [BUGFIX]  The `ParseMode` option is now set explicitly in the Telegram integration. If we don't HTML tags had not been parsed by default. #4027
* [BUGFIX] Fix a memory leak that was caused by updates silences continuously. #3930
* [BUGFIX] Fix hiding secret URLs when the URL is incorrect. #3887
* [BUGFIX] Fix a race condition in the alerts - it was more of a hypothetical race condition that could have occurred in the alert reception pipeline. #3648
* [BUGFIX] Fix a race condition in the alert delivery pipeline that would cause a firing alert that was delivered earlier to be deleted from the aggregation group when instead it should have been delivered again. #3826
* [BUGFIX] Fix version in APIv1 deprecation notice. #3815
* [BUGFIX] Fix crash errors when using `url_file` in the Webhook integration. #3800
* [BUGFIX] fix `Route.ID()` returns conflicting IDs. #3803
* [BUGFIX] Fix deadlock on the alerts memory store. #3715
* [BUGFIX] Fix `amtool template render` when using the default values. #3725
* [BUGFIX] Fix `webhook_url_file` for both the Discord and Microsoft Teams integrations. #3728 #3745

@grobinson-grafana do you want to take a look?

[SuperQ]

@gotjosh Nice, thanks

[gotjosh]

LGTM