Update docker.io/prom/prometheus Docker tag to v3.10.0

v3.10.0: 3.10.0 / 2026-02-24

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Prometheus now offers a distroless Docker image variant alongside the default
busybox image. The distroless variant provides enhanced security with a minimal
base image, uses UID/GID 65532 (nonroot) instead of nobody, and removes the
VOLUME declaration. Both variants are available with -busybox and -distroless
tag suffixes (e.g., prom/prometheus:latest-busybox, prom/prometheus:latest-distroless).
The busybox image remains the default with no suffix for backwards compatibility
(e.g., prom/prometheus:latest points to the busybox variant).

For users migrating existing named volumes from the busybox image to the distroless variant, the ownership can be adjusted with:

docker run --rm -v prometheus-data:/prometheus alpine chown -R 65532:65532 /prometheus

Then, the container can be started with the old volume with:

docker run -v prometheus-data:/prometheus prom/prometheus:latest-distroless

User migrating from bind mounts might need to ajust permissions too, depending on their setup.

• [CHANGE] Alerting: Add alertmanager dimension to following metrics: prometheus_notifications_dropped_total, prometheus_notifications_queue_capacity, prometheus_notifications_queue_length. #​16355
• [CHANGE] UI: Hide expanded alert annotations by default, enabling more information density on the /alerts page. #​17611
• [FEATURE] AWS SD: Add MSK Role. #​17600
• [FEATURE] PromQL: Add fill() / fill_left() / fill_right() binop modifiers for specifying default values for missing series. #​17644
• [FEATURE] Web: Add OpenAPI 3.2 specification for the HTTP API at /api/v1/openapi.yaml. #​17825
• [FEATURE] Dockerfile: Add distroless image variant using UID/GID 65532 and no VOLUME declaration. Busybox image remains default. #​17876
• [FEATURE] Web: Add on-demand wall time profiling under <URL>/debug/pprof/fgprof. #​18027
• [ENHANCEMENT] PromQL: Add more detail to histogram quantile monotonicity info annotations. #​15578
• [ENHANCEMENT] Alerting: Independent alertmanager sendloops. #​16355
• [ENHANCEMENT] TSDB: Experimental support for early compaction of stale series in the memory with configurable threshold stale_series_compaction_threshold in the config file. #​16929
• [ENHANCEMENT] Service Discovery: Service discoveries are now removable from the Prometheus binary through the Go build tag remove_all_sd and individual service discoveries can be re-added with the build tags enable_<sd name>_sd. Users can build a custom Prometheus with only the necessary SDs for a smaller binary size. #​17736
• [ENHANCEMENT] Promtool: Support promql syntax features promql-duration-expr and promql-extended-range-selectors. #​17926
• [PERF] PromQL: Avoid unnecessary label extraction in PromQL functions. #​17676
• [PERF] PromQL: Improve performance of regex matchers like .*-.*-.*. #​17707
• [PERF] OTLP: Add label caching for OTLP-to-Prometheus conversion to reduce allocations and improve latency. #​17860
• [PERF] API: Compute /api/v1/targets/relabel_steps in a single pass instead of re-running relabeling for each prefix. #​17969
• [PERF] tsdb: Optimize LabelValues intersection performance for matchers. #​18069
• [BUGFIX] PromQL: Prevent query strings containing only UTF-8 continuation bytes from crashing Prometheus. #​17735
• [BUGFIX] Web: Fix missing X-Prometheus-Stopping header for /-/ready endpoint in NotReady state. #​17795
• [BUGFIX] PromQL: Fix PromQL info() function returning empty results when filtering by a label that exists on both the input metric and target_info. #​17817
• [BUGFIX] TSDB: Fix a bug during exemplar buffer grow/shrink that could cause exemplars to be incorrectly discarded. #​17863
• [BUGFIX] UI: Fix broken graph display after page reload, due to broken Y axis min encoding/decoding. #​17869
• [BUGFIX] TSDB: Fix memory leaks in buffer pools by clearing reference fields (Labels, Histogram pointers, metadata strings) before returning buffers to pools. #​17879
• [BUGFIX] PromQL: info function: fix series without identifying labels not being returned. #​17898
• [BUGFIX] OTLP: Filter __name__ from OTLP attributes to prevent duplicate labels. #​17917
• [BUGFIX] TSDB: Fix division by zero when computing stale series ratio with empty head. #​17952
• [BUGFIX] OTLP: Fix potential silent data loss for sum metrics. #​17954
• [BUGFIX] PromQL: Fix smoothed interpolation across counter resets. #​17988
• [BUGFIX] PromQL: Fix panic with @ modifier on empty ranges. #​18020
• [BUGFIX] PromQL: Fix avg_over_time for a single native histogram. #​18058