Release Radar - Mackerel release notes

[Mackerel] You can now use the official release of Mackerel's log feature

Thu, 29 Oct 2026 15:00:00 GMT

You can now search and share logs by service in the officially supported Mackerel log feature. ・On the Standard Plan, you are billed 70 yen per GB excluding tax based on ingested log volume. ・You can send up to 1 GB of logs per month on the Free Plan and up to 1 TB during the two-week trial period. ・Logs are retained for 30 days, with no additional charges for storage or search execution. ・You can retrieve logs through the public API or the MCP server. https://mackerel.io/ja/blog/entry/announcement/log-ga-release

[Mackerel] You can now preview target hosts on the downtime configuration screen

Sun, 25 Oct 2026 15:00:00 GMT

You can now verify downtime target hosts in advance and refine log searches, while dashboard auto-refresh conditions changed. ・You can preview the list of hosts matching service and role filter conditions before saving on downtime creation and edit screens ・In structured log searches, enclosing key names in double quotes distinguishes keys containing dots from nested keys ・Auto-refresh is paused when the custom dashboard or a graph widget display period is 30 days or longer ・The disclosed PHP vulnerabilities (CVE-2026-109618, CVE-2026-109619) do not affect Mackerel service infrastructure or official agents https://mackerel.io/ja/blog/entry/weekly/20261026

[Mackerel] PHP vulnerabilities CVE-2026-109618 and CVE-2026-109619 do not affect Mackerel

Wed, 21 Oct 2026 15:00:00 GMT

The Mackerel service infrastructure and official mackerel-agent do not use PHP and are unaffected by the disclosed PHP vulnerabilities. https://mackerel.io/ja/blog/entry/announcement/20261022

[Mackerel] API key access and IDCF account login are suspended for IDCF Cloud plans

Tue, 06 Oct 2026 15:00:00 GMT

As a preventive measure, existing API key access and IDCF account login have been suspended for IDCF Free and IDCF Free+ plans. ・Metric posting and data retrieval using existing API keys stop for IDCF Free and IDCF Free+ plans ・Logging in to Mackerel using an IDCF Cloud account stops working ・You can continue monitoring by generating a new API key and replacing it in mackerel-agent and other tools ・Logging in with a password or via password reset remains available https://mackerel.io/ja/blog/entry/announcement/20261007-idcf

[Mackerel] You can now send traces and logs via OTLP/HTTP JSON, and agent proxy handling changed

Mon, 05 Oct 2026 15:00:00 GMT

Mackerel now accepts traces and logs in OTLP/HTTP JSON format, and mackerel-agent can bypass proxies by ignoring environment variables. ・You can now send traces and logs directly to Mackerel by specifying http/json as the protocol. ・Specifying direct for http_proxy or https_proxy in mackerel-agent v0.87.1 or later ignores proxy environment variables. ・Specifying -u kb in check-disk now correctly monitors thresholds in KB units in mackerel-check-plugins v0.53.0 or later. ・Specifying on_stop in host_status now reliably changes to the specified status in mackerel-agent v0.87.1 or later. ・A beta logs feature is now available on status page components. https://mackerel.io/ja/blog/entry/weekly/20261006

[Mackerel] Mackerel stops all systems temporarily due to database maintenance

Thu, 01 Oct 2026 15:00:00 GMT

All Mackerel systems will stop temporarily during maintenance on November 10, 2026, from 11:00 to 14:00 JST. ・Web access, API access, agent metric posting, and alert notifications will stop. ・Metrics buffered by the agent are resent after maintenance, but stopping or restarting the agent before completion loses data. ・Metrics exceeding thresholds during maintenance will not trigger retroactive alerts after maintenance. ・Alerts detected by check monitoring will trigger retroactively up to 6 hours after resending. ・Graphs for external monitoring and cloud integrations may have missing data during the maintenance period. https://mackerel.io/ja/blog/entry/announcement/20261002

[Mackerel] You can now use waterfall view in traces, log list API, and metadata search

Thu, 24 Sep 2026 15:00:00 GMT

You can now view trace waterfall charts, retrieve logs through a new API, and search hosts by their metadata in global search. ・You can switch between the existing Flame Graph and the new Waterfall view on the trace details screen via tabs ・You can use an API to retrieve logs by specifying time periods, keywords, log levels, trace IDs, and structured log fields ・You can search hosts in global search by host metadata such as hardware, OS, and region in addition to host name ・Host metadata search is omitted when searching including retired hosts or when the active host count exceeds the limit https://mackerel.io/ja/blog/entry/weekly/20260925

[Mackerel] You can now retrieve ALB IPv6 metrics and sort monitoring rules

Tue, 08 Sep 2026 15:00:00 GMT

You can now monitor IPv6 metrics for ALB and manage your monitoring rules and Terraform settings more flexibly. ・You can now retrieve Processed Bytes（IPv6） and Request Count（IPv6） metrics when integrating ALB through AWS Integration. ・You can now specify a time range shorter than 10 minutes when searching traces in APM. ・You can now view the last alert date and 30-day alert count on the monitoring rule list, and sort rules by fields such as type and update date. ・You can now check log data volume and view its minute-by-minute transitions using approximate usage metrics. ・You can now specify the IP version (IPv4, IPv6, or auto-detection) for URL external monitoring in terraform-provider-mackerel. https://mackerel.io/ja/blog/entry/weekly/20260909

[Mackerel] You can now set graph widget reference lines in Terraform Provider Mackerel

Wed, 26 Aug 2026 15:00:00 GMT

You can now manage dashboard lines in Terraform, use updated mkr CLI features, and toggle Slack snoozes directly from issue lists. ・In Terraform Provider Mackerel v0.13.0, you can now set reference lines on mackerel_dashboard graph widgets using the reference_lines argument ・You can now check, set, and clear Slack notification snoozes directly from the trace issue list and the APM issues tab ・The log search history page is now a separate page and can be accessed directly under the logs section in the side menu ・In mkr v0.66.0, you can now use the --jq option in dashboards, view monitoring rule details in alerts list, and bugs in wrap and filtering were fixed ・The log feature, currently in beta, will be officially released on 2026-11-01 https://mackerel.io/ja/blog/entry/weekly/20260827

[Mackerel] Mackerel log feature reaches general availability with ingest-based pricing

Thu, 20 Aug 2026 15:00:00 GMT

Mackerel log feature transitions to general availability on November 1, 2026, with ingest-based pricing and plan-specific usage limits. ・Ingested log data is billed at 70 yen (excluding tax) per GB rounded up, with no charges for data storage or query execution. ・The Free plan allows sending up to 1 GB of logs per month with a 30-day retention period. ・The Standard plan has no free tier for the log feature and is subject to the minimum monthly fee of 2,180 yen (including tax). ・New organizations can send up to 1 TB of logs for free during a 2-week trial period. ・Logs sent during the beta period and saved search conditions remain accessible in the official version within the 30-day retention period. https://mackerel.io/ja/blog/entry/announcement/log-ga-pre-info

[Mackerel] You can now review causes and prevention measures for labeled metrics migration issues

Thu, 06 Aug 2026 15:00:00 GMT

You can now check details, causes of data loss and display issues, and recurrence prevention measures for Mackerel labeled metrics. ・Histogram metric data submitted between May 28, 2026 15:53 and June 1, 2026 18:52 was lost, and refunds for overcharges are in progress. ・Past metrics and metrics lacking the service.name attribute can now be displayed and monitored normally. ・The Web console now specifically displays the affected feature scope during maintenance and outages. ・The official status page now separates the Labeled Metrics component so you can check the affected scope independently. https://mackerel.io/ja/blog/entry/announcement/20260807

[Mackerel] Partial Japanese status page display and end of Amazon Linux 2 support

Tue, 04 Aug 2026 15:00:00 GMT

You can now read status page titles and bodies in Japanese, while Amazon Linux 2 is no longer supported for mackerel-agent. ・Labeled Metrics are now tracked separately from standard Metrics under Components on the status page. ・Traces with an empty service.name attribute are now saved with unknown_service filled in. ・You can now retrieve trace information using mkr traces get in mkr 0.65.0 or later. ・You can now view attached OpenTelemetry attributes by expanding a log entry. ・Specifying multiple keywords in log search now runs an AND search. https://mackerel.io/ja/blog/entry/weekly/20260805

[Mackerel] Mackerel terms of service and privacy policy will change

Thu, 30 Jul 2026 15:00:00 GMT

The terms of service and privacy policy will change with new provisions for third-party consent and additional data use purposes. ・A requirement to obtain consent from individuals upon request is added when user data contains third-party personal data. ・Service improvement is added to the permitted purposes for using received confidential information. ・Usage tracking, effectiveness measurement, and failure response are added to the privacy policy data use purposes. https://mackerel.io/ja/blog/entry/announcement/20260731

[Mackerel] The Mackerel for KCPS terms of use and Mackerel privacy policy will change

Thu, 30 Jul 2026 15:00:00 GMT

On October 1, 2026, the terms of use for Mackerel for KCPS and the privacy policy will change regarding personal data handling. ・In Mackerel for KCPS, if user data includes third-party personal information, you must take necessary measures such as obtaining consent upon request. ・Service usage status will be provided to KDDI Corporation to isolate and investigate defects in Mackerel for KCPS. ・The permitted purpose for confidential information now includes service improvement. ・Purposes of using personal information in the privacy policy will include understanding service usage, measuring effectiveness, and responding to failures. https://mackerel.io/ja/blog/entry/announcement/20260731-kcps

[Mackerel] Report on PHP Conference 2026 and release of demo code on GitHub

Wed, 29 Jul 2026 15:00:00 GMT

You can now read the PHP Conference 2026 event report and access the booth demo application source code on GitHub. ・The exhibition demo is built with PHP 8.5 and Laravel 13. ・You can use the demo source code as a reference when introducing OpenTelemetry instrumentation into your applications. https://mackerel.io/ja/blog/entry/event/phpcon-2026-report

[Mackerel] You can now use the open beta of the log feature in Mackerel

Tue, 28 Jul 2026 15:00:00 GMT

You can now search structured logs from the UI and correlate them with traces in the open beta version of Mackerel APM. ・You can search structured logs by specifying attributes directly from the screen. ・You can save and share search criteria with your team and review automatically recorded search history. ・You can navigate between error logs and traces bidirectionally to inspect related events. https://mackerel.io/ja/blog/entry/basic/observability-with-log

[Mackerel] You can now send logs with MDOT and retrieve check monitors via the public API

Tue, 21 Jul 2026 15:00:00 GMT

You can now send logs using MDOT, retrieve check monitors via the public API, and navigate graph time ranges with browser buttons. ・You can now send logs from the MDOT collector. ・You can now move to previous or next time ranges using browser back and forward buttons when changing graph display periods. ・You can now retrieve the list of configured check monitors via the public API. https://mackerel.io/ja/blog/entry/weekly/20260722

[Mackerel] Three ways to send Rails logs to Mackerel with trace correlation

Thu, 16 Jul 2026 15:00:00 GMT

You can now send Rails logs to Mackerel with trace correlation by outputting single-line JSON to an OpenTelemetry collector. ・Embed trace_id and span_id into single-line JSON logs from Rails to link them with traces. ・Read log files with the file_log receiver and parse JSON using json_parser. ・Forward standard output logs through Fluentd and handle JSON parsing and severity mapping with a transform processor. ・Poll logs from CloudWatch Logs using the awscloudwatch receiver. ・Send logs to Mackerel by specifying the mackerel_otlp exporter in the OpenTelemetry collector. https://mackerel.io/ja/blog/entry/tech/sending-logs-from-rails

[Mackerel] You can now use the open beta of the log feature in Mackerel

Wed, 15 Jul 2026 15:00:00 GMT

You can now use the open beta of Mackerel's log feature to search and filter logs sent via OpenTelemetry from the web console. ・You can send logs to Mackerel via OpenTelemetry Collector or the OTel SDK. ・You can filter logs by service.namespace, service.name, and log levels. ・You can search structured logs by attribute and save search conditions to share with your team. ・Logs are retained for 30 days, and the feature is available at no extra charge during the beta period. ・Usage-based pricing based on ingest data volume is planned after general availability. https://mackerel.io/ja/blog/entry/announcement/log-beta-release

[Mackerel] Mackerel support desk closure during the Bon holiday period

Thu, 09 Jul 2026 15:00:00 GMT

The Mackerel support desk will be closed from August 10 to August 14, 2026. ・Inquiries submitted during the closure period will be answered sequentially starting August 17, 2026 ・Inquiries submitted by August 7, 2026 may also receive replies starting August 17, 2026 depending on the content https://mackerel.io/ja/blog/entry/announcement/20260710

[Mackerel] You can now select which series to display in custom dashboard graphs

Wed, 08 Jul 2026 15:00:00 GMT

You can now select graph series in custom dashboards and collect Azure Cosmos DB metrics alongside several other enhancements. ・You can now select which series to display in custom dashboard graph widgets, configurable via API and Terraform. ・You can now collect Azure Cosmos DB metrics using the Azure integration. ・Web console banners now show the specific features affected during maintenance and outages. ・You can now use new PromQL syntax for metrics and labels, with quote completion and label suggestions. ・You can now configure mackerel-agent to use the timestamp provided by a plugin with use_plugin_timestamp. https://mackerel.io/ja/blog/entry/weekly/20260709

[Mackerel] Sponsorship of PHP Conference 2026 and booth exhibition

Tue, 07 Jul 2026 15:00:00 GMT

At PHP Conference 2026, you can visit the booth to see demonstrations of the upcoming Mackerel log feature and join hands-on activities. ・PHP Conference 2026 will be held on July 20, 2026, at Ota City Industrial Plaza PiO. ・The exhibition booth will offer a hands-on corner and heat relief items. https://mackerel.io/ja/blog/entry/announcement/phpcon_2026

[Mackerel] You can now view detailed route information on the APM HTTP server tab

Thu, 25 Jun 2026 15:00:00 GMT

You can now view route-level metrics in APM, and behavior changed for the notification group API and Terraform provider. ・Selecting a route on the APM HTTP server screen opens a details view with request and latency charts and a trace list. ・The type column is included in notification group registration and list API responses, returning group-default for default groups and group for others. ・Notification channels created with terraform-provider-mackerel v0.10.0 or later are no longer automatically added to the default notification group. ・You can now use the mackerel_default_notification_group resource to manage default notification groups in Terraform. ・Kubernetes 1.36 is now supported as an operating environment for mackerel-container-agent. https://mackerel.io/ja/blog/entry/weekly/20260624

[Mackerel] You can try the open beta of the Mackerel log feature

Tue, 23 Jun 2026 15:00:00 GMT

You will be able to try searching and filtering logs and sharing search conditions with your team in the Mackerel open beta. ・You can access the open beta starting July 16, 2026 ・You can build search conditions for JSON structured logs on screen without writing queries ・Team members can recall saved search conditions to reproduce investigation steps ・Search activities are preserved as team search history even without saving search conditions https://mackerel.io/ja/blog/entry/announcement/log-beta-pre-info

[Mackerel] You can now read an explanation of observability and how it differs from monitoring

Sun, 14 Jun 2026 15:00:00 GMT

You can now read a guide explaining observability concepts, how it differs from monitoring, and adoption tips. https://mackerel.io/ja/blog/entry/basic/observability

[Mackerel] You now receive OK notifications when alerts close for retired hosts

Wed, 10 Jun 2026 15:00:00 GMT

Closing alerts for retired hosts now delivers OK notifications so you can easily track state changes. ・Query graph series selections are now preserved when changing the time range in full-screen view. ・Ubuntu 26.04 LTS (Resolute Raccoon) is now supported by mackerel-agent. ・You can now skip certificate verification when collecting metrics by specifying the -tls-skip-verify option in mackerel-plugin-nginx. ・You can now use the CloudWatch GetMetricData API by specifying the -use-get-metric-data option in mackerel-plugin-aws-ec2-ebs. ・The supported version for mackerel-plugin-mongodb changed to MongoDB 4.2 or later, and versions 4.1 or earlier may stop working after updating. https://mackerel.io/ja/blog/entry/weekly/20260611

[Mackerel] You can now read the event report for JJUG CCC 2026 Spring

Tue, 09 Jun 2026 15:00:00 GMT

You can now review the booth activities and related materials from JJUG CCC 2026 Spring. ・You can download the "Spring Boot 4 アプリケーションのOpenTelemetry 計装ガイド" from the website. ・You can check the introductory article about the Mackerel log feature currently under development. ・You can view the survey results on log utilization challenges collected at the booth. https://mackerel.io/ja/blog/entry/event/jjug-ccc-2026-Spring-report

[Mackerel] Guide on distributed tracing using Mackerel APM and OpenTelemetry

Thu, 28 May 2026 15:00:00 GMT

A guide explains how to trace front-end and back-end performance and identify bottlenecks using Mackerel APM and OpenTelemetry. ・You can use client tokens with scopes limited to trace submission for front-end traces. ・You can configure a rate limit on the number of spans per minute for client tokens. ・You can create client tokens from the Client Tokens tab of the organization. https://mackerel.io/ja/blog/entry/tech/connecting-frontend-and-backend-with-traces

[Mackerel] Tag-based host filtering for Amazon Connect and API enhancements

Tue, 26 May 2026 15:00:00 GMT

You can now avoid registering unwanted Amazon Connect hosts and benefit from various API and screen usability improvements. ・In the AWS Integration for Amazon Connect, you can now filter registered hosts by specifying tags. ・The notification channel registration API now allows specifying whether to add to the default notification group using the addToDefaultNotificationGroup parameter. ・Check monitoring with no posts for 30 days or more is no longer displayed as candidates in the notification group monitoring rule list. ・Metric Explorer no longer searches automatically when opened, changing to a behavior where graphs are displayed after clicking the search button. ・You can now connect to the Mackerel Web console and API endpoints using IPv6 addresses. https://mackerel.io/ja/blog/entry/weekly/20260527

[Mackerel] You can try the Mackerel log feature prototype at JJUG CCC 2026 Spring

Mon, 18 May 2026 15:00:00 GMT

You can try the Mackerel log feature prototype and receive an OpenTelemetry guide for Spring Boot at JJUG CCC 2026 Spring. ・You can experience the prototype of the log feature currently under development at the Belle Salle Shinjuku Grand venue. ・You can obtain the booklet and digital content of Spring Boot 4 Application OpenTelemetry Instrumentation Guide. ・The instrumentation guide booklet is available on a first-come, first-served basis in limited quantities. https://mackerel.io/ja/blog/entry/announcement/jjug-ccc-2026-Spring