v0.93.0: 0.93.0 / 2026-07-28

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• [CHANGE] Switch from uint to int types in the Go definition of the CRDs and add API validations to reject negative values. #​8662 #​8666
• [CHANGE] Keep local Prometheus compaction enabled when the Thanos sidecar uploads to object storage, for Prometheus >= v3.9.0 and Thanos >= v0.41.0. The operator now coordinates uploads through the shipper meta file (--storage.tsdb.delay-compact-file.path, --shipper.meta-file-name, --shipper.ignore-unequal-block-size) instead of disabling compaction. Set spec.disableCompaction: true to keep the previous behavior. #​8694
• [CHANGE] Define a default value of 1 for .spec.shards for Prometheus and PrometheusAgent CRDs. #​8691
• [CHANGE/BUGFIX] Add validation markers to all unsigned int fields to reject negative values. #​8662
• [CHANGE/BUGFIX] Disable metadata sending when the remote-write configuration uses message version v2.0. #​8700
• [FEATURE] Add updateMessage field to the Slack receiver in the AlertmanagerConfig CRD. #​8506
• [FEATURE] Add chunkEncoding field to TSDBSpec for runtime float encoding selection in Prometheus and PrometheusAgent CRDs. #​8675
• [ENHANCEMENT] Use pod's name as the peer name for Alertmanager >= v0.30.0. #​8705
• [BUGFIX] Create IPv6 EndpointSlice for the kubelet Service on dual-stack clusters. #​8682

v0.92.1: 0.92.1 / 2026-06-30

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• [BUGFIX] Fix "namespace not found" errors when the operator watches monitoring and workload resources in different resources. #​8658

v0.92.0: 0.92.0 / 2026-06-18

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[!NOTE]
The PrometheusTopologySharding and PrometheusShardRetentionPolicy feature gates have been promoted to Beta in this release and are now enabled by default. See the sharding documentation for details.

• [CHANGE] Add URL validation for the tokenUrl field in OAuth2 configuration across all CRDs. #​8579
• [CHANGE] Add URL validation for the url field in RemoteReadSpec in Prometheus CRD. #​8596
• [FEATURE] Migrate retention options from CLI flags to the config file for Prometheus CRD (Prometheus >= v3 uses the config file; older versions continue to use CLI flags). #​8547
• [FEATURE] Add staleSeriesCompactionThreshold field to TSDBSpec in Prometheus and PrometheusAgent CRDs. #​8563
• [FEATURE] Add labelNameUnderscoreSanitization and labelNamePreserveMultipleUnderscores fields to OTLPConfig in Prometheus and PrometheusAgent CRDs. #​8562
• [FEATURE] Add payload field to Webhook receiver in AlertmanagerConfig CRD. #​8507
• [ENHANCEMENT] Use pod topology labels for zone sharding on Kubernetes >= 1.35 when the PrometheusTopologySharding feature gate is enabled (removes the need for attachMetadata.node=true). #​8564
• [ENHANCEMENT] Add validation for the Slack update_message field in Alertmanager configuration Secret. #​8556
• [BUGFIX] Validate target labels in Probe static configuration to prevent invalid Prometheus scrape configs. #​7901
• [BUGFIX] Fix goroutine leak and data race in pollBasedListerWatcher. #​8593
• [BUGFIX] Validate ProxyConfig in OAuth2 configuration. #​8610
• [BUGFIX] Fix SMTP smarthost format error handling in Alertmanager configuration. #​8586
• [BUGFIX] Fix missing return in admission webhook after marshal failure. #​8582
• [BUGFIX] Fix FindOwner to return nil on meta.Accessor error. #​8585
• [BUGFIX] Fix dropped gzip Close errors in GzipConfig and GunzipConfig. #​8573
• [BUGFIX] Fix panic on malformed key=value flag input (e.g. --labels "key"). #​8560

v0.91.0: 0.91.0 / 2026-05-05

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• [CHANGE] Enforce mutual exclusion of basicAuth, authorization and oauth2 in ScrapeConfig CRD. #​8480
• [CHANGE] Add minimum length validations to string fields in ScrapeConfig CRD. #​8479
• [CHANGE] Add validations for VictorOps receiver in AlertmanagerConfig CRD. #​8220
• [CHANGE] Add validations for OpsGenie receiver in AlertmanagerConfig CRD. #​8267
• [CHANGE] Add validations for Email receiver in AlertmanagerConfig CRD. #​8270
• [FEATURE] Implement shard retention based on Prometheus data retention (it requires the PrometheusShardRetentionPolicy feature gate). #​8478
• [FEATURE] Configure node selector when sharding mode is Topology for Prometheus and PrometheusAgent custom resources (it requires the PrometheusTopologySharding feature gate). #​8486
• [FEATURE] Configure external label with topology information when sharding mode is Topology for Prometheus and PrometheusAgent custom resources (it requires the PrometheusTopologySharding feature gate). #​8519
• [FEATURE] Distribute scrape targets within topology zones when sharding mode is Topology for Prometheus and PrometheusAgent custom resources (it requires the PrometheusTopologySharding feature gate). #​8538
• [FEATURE] Add --promql-options CLI argument to the admission-webhook binary. #​8531
• [FEATURE] Validate PrometheusRule resources selected by Prometheus resources based on the PromQL enabled features. #​8545
• [FEATURE] Add workload identity authentication method for AzureSD in ScrapeConfig CRD. #​8489
• [ENHANCEMENT] Support strategic merge patch of container probes when workloads are configured with HTTPS. #​8427
• [ENHANCEMENT] Support auth_secret_file field for Email receiver in Alertmanager configuration Secret. #​8394
• [ENHANCEMENT] Support smtp_auth_secret_file field in Alertmanager configuration Secret. #​8396
• [ENHANCEMENT] Add externalId field to SigV4 configuration in Alertmanager, Prometheus, PrometheusAgent and ThanosRuler CRDs. #​8494
• [ENHANCEMENT] Add cipherSuites support for Thanos Sidecars and Rulers. #​8524
• [ENHANCEMENT] Add curves support for Thanos Sidecars and Rulers. #​8542
• [ENHANCEMENT] Speed up configuration reloads by watching the config file's parent directory. #​7366
• [ENHANCEMENT] Support Mattermost global webhook URL support in Alertmanager configuration Secret. #​8501
• [ENHANCEMENT] Add Mattermost global webhook URL support in Alertmanager CRD. #​8503 #​8534
• [ENHANCEMENT] Support payload field for Webhook receiver in Alertmanager configuration Secret. #​8505
• [ENHANCEMENT] Support attachment fields for Mattermost receiver in Alertmanager configuration Secret. #​8508
• [ENHANCEMENT] Support update_message field for Slack receiver in Alertmanager configuration Secret. #​8502
• [ENHANCEMENT] Add threading configuration for email receiver in AlertmanagerConfig CRD. #​8400
• [ENHANCEMENT] Add healthFilter field for ConsulSD in ScrapeConfig CRD. #​8529
• [BUGFIX] Ensure that inactive shards don't scrape any targets when the sharding retention policy is Retain. #​8513
• [BUGFIX] Fix Telegram bot token validation in Alertmanager configuration Secret. #​8465

v0.90.1: 0.90.1 / 2026-03-25

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• [BUGFIX] Fix Probe ignoring HTTP client settings in scrape configuration. #​8461

v0.90.0: 0.90.0 / 2026-03-19

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• [CHANGE/BUGFIX] Validate that the remote-write URL scheme is either http or https. #​8455
• [FEATURE] Add --repair-policy-for-statefulsets CLI argument to the operator. It defines how the operator manages StatefulSet's pods stuck at an incorrect revision. Users running Kubernetes v1.35+ are encouraged to enable this feature (see troubleshooting guide). #​8443
• [FEATURE] Add schedulerName support to the Prometheus, PrometheusAgent, Alertmanager and ThanosRuler CRDs. #​8451
• [ENHANCEMENT] Add --web.tls-curves CLI argument to the operator and admission-webhook binaries. #​8385
• [ENHANCEMENT] Support minimum TLS version for Thanos gRPC servers. #​8438
• [ENHANCEMENT] Add version label to ThanosRuler pods. #​8441
• [ENHANCEMENT] Add messageText support for Slack receiver in AlertmanagerConfig CRD. #​8374
• [ENHANCEMENT] Add messageText support for Slack receiver in Alertmanager secret config. #​8375
• [ENHANCEMENT] Add forceImplicitTLS support for SMTP email config in Alertmanager secret config. #​8384 #​8404
• [ENHANCEMENT] Add forceImplicitTLS support for SMTP email config in AlertmanagerConfig CRD. #​8386
• [ENHANCEMENT] Add forceImplicitTLS support for SMTP global config in Alertmanager secret config. #​8405
• [ENHANCEMENT] Add forceImplicitTLS support for SMTP global config in Alertmanager CRD. #​8406
• [ENHANCEMENT] Add support for global Telegram bot token in Alertmanager CRD. #​8372
• [ENHANCEMENT] Add chatIDFile support for Telegram receiver in Alertmanager secret config. #​8376
• [ENHANCEMENT] Add wechatAPISecretFile support in Alertmanager global config. #​8377
• [ENHANCEMENT] Add authSecretFile support for email config in Alertmanager secret config. #​8396
• [ENHANCEMENT] Add nested field support for PagerDuty description in Alertmanager secret config. #​8402
• [ENHANCEMENT] Add email threading support in Alertmanager secret config. #​8388
• [ENHANCEMENT] Add field and label selectors for ConfigMap watches. #​8368
• [ENHANCEMENT] Improve ScrapeConfig API consistency and validation. #​8422
• [BUGFIX] Fix ThanosRuler config resource status not being updated on initial StatefulSet creation. #​8358
• [BUGFIX] Preserve LastTransitionTime in Prometheus status conditions. #​8346
• [BUGFIX] Make Mattermost text field optional in AlertmanagerConfig CRD. #​8363
• [BUGFIX] Remove nil error wrapping in v1alpha1 duplicate receiver validation. #​8379
• [BUGFIX] Aggregate Available condition across Prometheus shards. #​8434
• [BUGFIX] Reconcile resources with inconsistent status. #​8397
• [BUGFIX] Fix namespace lister/watcher compatibility with Kubernetes v1.35 client-go. #​8431
• [BUGFIX] Fix missing OAuth2 field in IonosSDConfig generation. #​8433
• [BUGFIX] Fix missing fields in AzureSDConfig. #​8444
• [BUGFIX] Validate Microsoft Teams V2 URL in AlertmanagerConfig CRD. #​8227
• [BUGFIX] Fix labelmap relabel action rejecting valid replacement values with template variables for Prometheus 2.x. #​8337