Hello Prometheans,
We're pleased to announce the release of Alertmanager v0.26. It is
available from the GitHub release page [1] or from your favorite container
registry (Docker Hub or Quay).
This release includes a hefty number of improvements and an important
security fix - it's highly recommended you update.
Changelog:
- [CHANGE] Telegram Integration: `api_url` is now optional. #2981
- [CHANGE] Telegram Integration: `ParseMode` default is now `HTML`
instead of `MarkdownV2`. #2981
- [CHANGE] Webhook Integration: `url` is now marked as a secret. It will
no longer show up in the logs as clear-text. #3228
- [CHANGE] Metrics: New label `reason` for
`alertmanager_notifications_failed_total` metric to indicate the type of
error of the alert delivery. #3094 #3307
- [FEATURE] Clustering: New flag `--cluster.label`, to help to block any
traffic that is not meant for the cluster. #3354
- [FEATURE] Integrations: Add Microsoft Teams as a supported
integration. #3324
- [ENHANCEMENT] Telegram Integration: Support `bot_token_file` for
loading this secret from a file. #3226
- [ENHANCEMENT] Webhook Integration: Support `url_file` for loading this
secret from a file. #3223
- [ENHANCEMENT] Webhook Integration: Leading and trailing white space is
now removed for the contents of `url_file`. #3363
- [ENHANCEMENT] Pushover Integration: Support options `device` and
`sound` (sound was previously supported but undocumented). #3318
- [ENHANCEMENT] Pushover Integration: Support `user_key_file` and
`token_file` for loading this secret from a file. #3200
- [ENHANCEMENT] Slack Integration: Support errors wrapped in successful
(HTTP status code 200) responses. #3121
- [ENHANCEMENT] API: Add `CORS` and `Cache-Control` HTTP headers to all
version 2 API routes. #3195
- [ENHANCEMENT] UI: Receiver name is now visible as part of the alerts
page. #3289
- [ENHANCEMENT] Templating: Better default text when using `{{
.Annotations }}` and `{{ .Labels }}`. #3256
- [ENHANCEMENT] Templating: Introduced a new function `trimSpace` which
removes leading and trailing white spaces. #3223
- [ENHANCEMENT] CLI: `amtool silence query` now supports the `--id` flag
to query an individual silence. #3241
- [ENHANCEMENT] Metrics: Introduced
`alertmanager_nflog_maintenance_total` and
`alertmanager_nflog_maintenance_errors_total` to monitor maintenance of the
notification log. #3286
- [ENHANCEMENT] Metrics: Introduced
`alertmanager_silences_maintenance_total` and
`alertmanager_silences_maintenance_errors_total` to monitor maintenance of
silences. #3285
- [ENHANCEMENT] Logging: Log GroupKey and alerts on alert delivery when
using debug mode. #3438
- [BUGFIX] Configuration: Empty list of `receivers` and `inhibit_rules`
would cause the alertmanager to crash. #3209
- [BUGFIX] Templating: Fixed a race condition when using the `title`
function. It is now race-safe. #3278
- [BUGFIX] API: Fixed duplicate receiver names in the `api/v2/receivers`
API endpoint. #3338
- [BUGFIX] API: Attempting to delete a silence now returns the correct
status code, `404` instead of `500`. #3352
- [BUGFIX] Clustering: Fixes a panic when `tls_client_config` is empty.
#3443
- [BUGFIX] Fix stored XSS via the /api/v1/alerts endpoint in the
Alertmanager UI.
[1] https://github.com/prometheus/alertmanager/releases/tag/v0.26.0
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