Mackerel blog #mackerelio

The Official Blog of Mackerel

Prices to be revised due to the consumption tax rate change

Thank you for choosing Mackerel.

Due to the consumption tax rate changing from 8% to 10% starting October 1, 2019, the price of our Standard plan will also change in the following ways starting in October 2019.

  • Standard Host unit cost

    • Previously 1,800JPY(tax included)
    • Revised cost 1,833JPY(tax included)
  • Micro Host unit cost

    • Previously 648JPY(tax included)
    • Revised cost 660JPY(tax included)

The new prices will be applied to the billing at the beginning of November 2019. October’s billing will cover September’s usage, so the prices will use the previous tax rate.

If you have questions or concerns, please feel free to contact us at

Thank you

The official release of Anomaly Detection for roles and more

Hello. CRE Miura (id:missasan) here.

This week is packed full of new announcements like the official release of Anomaly Detection for roles, AWS Integration support for Amazon Kinesis Data Firehose, OSS updates, and the Obon holiday break... so be sure to read until the end!

Now on to this week’s update information.

The official release of Anomaly Detection for roles

The Anomaly Detection for roles function has officially been released. With this, as was previously announced the other day, usage of this function will incur charges starting from August 2019. The ability to check the functions usage status will be available from the Plan tab in your organization’s detail screen starting early August.

Check out the following blog post for more information about billing.

The following features have also been released.

Support for Mackerel API

Anomaly Detection for roles can now be operated from the Mackerel API. This can be used with the Monitor configuration API and the Alerts API.

Support for mkr command

With mkr v0.39.0, Anomaly Detection for roles can now also be operated from mkr command.

With a monitor configured for Anomaly Detection for roles, monitor information and alerts will be displayed in the mkr monitors and mkr alerts results. Configuration changes with the diff, push, and pull subcommands are also supported.

Amazon Kinesis Data Firehose Integration release

Amazon Kinesis Data Firehose now supported with AWS Integration.

When integrating with AWS integration, billable targets are determined using the conversion 1 delivery stream = 1 Micro host. Up until now, it was possible to collect metrics using the plugin if you set up a metric collection instance etc., but now with integration, it’s even easier to visualize metrics in Mackerel. Be sure to give it a try!

custom_identifier now supported with check-plugin

custom_identifier is a configuration that allows the user to assign a unique identifier to the host and can be specified in the plugin’s settings. By using this, monitoring results can be sent as a monitor of the specified host instead of the host on which mackerel-agent is running.

With mackerel-agent v0.61.1, custom_identifier can now also be used for check monitoring. For example, when using check-mysql to check the connection from the Web server to the DB server, you can post this result as that of the DB server.

For more details, check out the following help page.

CGC and CGCT metrics added to plugin-jvm

With mackerel-agent-plugins v0.57.0, CGC and CGCT metrics have been added to mackerel-plugin-jvm. This also addresses the metric retrieval error issue when using SerialGC.

Support Window closed during the Obon holiday from August 13th-15th

Official Mackerel support (the "Feedback" option displayed in the upper right corner of the header while logged-in to Mackerel as well as correspondence/inquiries to will be closed during the Obon holiday through the following dates.

Support window period of closure:Aug. 13th, 2019 (Tues.) ~ Aug. 15th, 2019 (Thur.) (JST)

Inquiries received during this period will be replied to in order on Friday, August 16th. Thank you for your cooperation.

mackerel-container-agent has been updated

Hello. CRE Nishiyama (id:tukaelu) here.

Today is another humid one.

At home I’ve been running the air conditioner and the dehumidifier. With Mackerel, I’ve been able to monitor my room temperature and humidity, but recently I’ve started to worry about my electricity bill. Maybe I should start monitoring the amount of electricity I use as well.

This week’s release content concerns mackerel-container-agent!

mackerel-plugin-json now included

Although mackerel-plugin-json was not included as an official plugin, it has now been added to the plugins bundled with mackerel-container-agent.

This plugin is really useful when monitoring with endpoints that respond in JSON format such as the "Health Endpoint Pattern" mentioned in "Introductory Monitoring".

This plugin will be particularly useful in a lot of cases regarding container operation and monitoring. I definitely recommend giving it a try!

The region can now be resolved when the configuration file URL is S3 specified

The region error that occurred by specifying s3:// in the external configuration file of the container agent when the environment variable AWS_DEFAULT_REGION is not set has been fixed.

The configuration file can now be read at fixed intervals

The configuration file can now be reloaded in fixed minute intervals by configuring MACKEREL_AGENT_CONFIG_POLLING_DURATION_MINUTES in the environment variables of mackerel-container-agent,

For more information, be sure to refer to the manual explanation as well!

Mackerel at CloudNative Days Tokyo 2019 (July 22-23)!

Mackerel will be running a booth at CloudNative Days Tokyo 2019 held at Toranomon Hills Forum for two days from July 22nd to the 23rd.

Today from 4:40pm - 5:20pm (JST) in RoomH, Mackerel team SRE Imai (id:hayajo_77) will be presenting on "The strategy behind the development of the Mackerel team's container agent and future plans"!!

Also, the CRE team will be preparing a demo environment with novelty goods in the Exhibition AREA on the 5F, so be sure to stop by the Mackerel booth if you’re coming to the event!

We hope to see you there!!

The channel settings screen can now be opened directly from the side menu

Hello. CRE Inoue (id:a-know) here. Now that the rainy season has begun, the heat and humidity are in full swing. I hope everyone out there is able to keep cool.

Recently, I’ve only been craving cold food, and apparently that can be a barometer for summer fatigue. It would be nice if I could "monitor" what and how much I eat and drink this summer. Lol

Now on to this week’s releases.

The channel settings screen can now be opened directly from the side menu


As you can see, Channels has been added to the side menu. Now you can open your channel settings screen directly from here. We hope this makes things more convenient!

New metrics obtainable with the mackerel-plugin-aws-batch plugin

The metrics SUCCEEDED FAILED have been added as metrics that can be obtained with the mackerel-plugin-aws-batch plugin. This plugin can be installed with the mkr plugin install command. For more details, refer to the following help page.

Mackerel at CloudNative Days Tokyo 2019(7/22〜23)!

The Mackerel team will be running a booth at CloudNative Days Tokyo 2019 , which will be held at Toranomon Hills Forum for two days from July 22nd (Mon) to the 23rd (Tuesday). That’s next week!

Mackerel team SRE Imai (id:hayajo_77) will be taking to the stage and presenting on the topic titled ‘The strategy behind the development of the Mackerel team's container agent and future plans’. The presentation will be an overview of Mackerel's container environment and other things considered during development.

Me and the other CREs will be running the Mackerel booth set up with a demonstration environment in the Exhibition AREA on the 5th floor. We’ll also have stickers and new novelty goods, so be sure to stop by! Lol

I’m really looking forward to seeing as many of you as possible at the event!

Anomaly Detection for Roles will become a paid feature starting August 2019

Thank you for choosing Mackerel.

The other day, the beta version of Anomaly Detection for Roles was released for Mackerel.

Based on the feedback we’ve received up to this point and improvements made, we believe that the quality of this function has satisfied a certain level and have decided to officially provide the feature starting August 2019.

As an official feature, we will no longer offer the free campaign during the beta trial period.

The action of becoming an official feature does not require any special operation from the user. If you continue to use Anomaly Detection for Roles, it will automatically switch to the official version and charges will incur.

Charge settings and settlement timing for Anomaly Detection for Roles

Anomaly Detection for Roles will be charged at a rate of 1,800 jpy for every five standard hosts that are registered in a monitored role. The number of standard hosts will be calculated on a moving average of one month, taking into account auto scale and so on.

For example, if six standard hosts are registered in role A, and Anomaly Detection for Roles is configured for role A, using the conversion 2 units x 1,800 jpy, a charge of 3,600 jpy will be applied. This calculation is done on a per-role basis. For example, if the same Standard Host is registered in multiple roles, it will be counted for each role.

Role A Role B
Standard Host V, W, Z Standard Host X, Y, Z

In the above example, Standard Host Z overlaps in roles A and B. This will count as 6 Standard Hosts for Anomaly Detection for Roles.

The Anomaly Detection for Roles function will be officially provided starting August 1st, 2019. Usage charges for the month of August will be applied to September’s settlement.

You can check how many Standard Hosts are currently being counted for Anomaly Detection for Roles from your account’s Plan tab (

If you have any questions or concerns, please feel free to contact us at

Automatically switch themes to match macOS Dark Mode and more

Mackerel team CRE Miura (id:missasan) here.

July has begun and the rain continues to fall, but summer feels like it’s just around the corner.

Since this month marks the end of the 2019 fiscal year, the Mackerel team has been busy revising its long-term plans and putting everything in order for next term like road maps and official events. If I get any news that I’m able to report, I’ll be sure to let you all know through our blog and other social networks.

Now on to this week’s update information.

Automatically switch themes to match macOS Dark Mode

Settings have been added to automatically switch themes to match the appearance (Dark Mode/Light Mode) of macOS Mojave. You can enable/disable automatic theme switching from the user interface of your account settings.


Note that this function is only available for browsers/OS that are appearance mode compatible.

For those of you who are new to Mackerel, you may not have even noticed that themes can be switched in the first place. Mackerel's Dark Mode theme was originally released as an April fools joke in 2015 under the promotional tag “The hacker mode you see in movies”, but was later officially released thanks to such a favorable reception. With this release, it is now possible to have the theme automatically switch to this hacker mode to match the macOS appearance settings.

Changes made to the exception that generates with HTTP errors in mackerel-client-ruby

Changes have been made to the exception that generates with HTTP errors in mackerel-client-ruby v0.8.0. In addition to this, the issue of the exception not being sent correctly when receiving some status codes has been fixed.

AWS Integration now supports EFS and more

Hello! My name is Nishiyama (id:tukaelu) and I joined the Mackerel team as a CRE in May.

It’s hard to believe that 1 month has already passed since the start of the new Reiwa era, and it’s also been 1 month since I joined the Mackerel team. This is my first time bringing you the release announcement! I’m definitely looking forward to seeing you all at future events!

In fact, we participated in the AWS Summit Tokyo 2019 held over three days last week at the Makuhari Messe (from July 12th to 14th).

This year's Makuhari Messe was even larger than last year and still crowded with a large number of visitors. Thank you to everyone who visited the Mackerel booth!


One of our engineers, Watanabe (id:wtatsuru), ran a mini session that attracted quite a few quests.

We’re also planning on participating in the AWS Summit Osaka 2019 at the Grand Front Osaka next Thursday, June 27th. If you’re going to the event, be sure to stop by the Mackerel booth!

Now on to this week’s update information.

Amazon Elastic File System Integration release

AWS Integration now supports Amazon Elastic File System!

With Integration configured, 1 File System = 1 Micro host in Mackerel with a maximum number of 28 metrics.

JAVA_HOME changed to the default search option with mackerel-plugin-jvm

Searching under JAVA_HOME (such as $JAVA_HOME/bin/jps etc.) is now the default when JAVA_HOME is configured as an environment variable in mackerel-plugin-jvm.

If JAVA_HOME is not configured, /usr/bin (such as /usr/bin/jps etc.) will be used as before. If anything other than /usr/bin is specified, you can simplify the specification of command options by configuring JAVA_HOME.

Because this update is an incompatible update, users should note whether or not JAVA_HOME is configured in environment variables when performing this update.

The itemization of hosts can now be checked in the amount of the charge log

From May on, the itemization of Standard hosts/Micro hosts regarding payments is now displayed in the credit card charge log which can be accessed from the organization’s plan tab.

Version display now supported for Amazon Elasticsearch Service Integration

The version of Elasticsearch is now displayed in the ElasticsearchService host information of AWS integration.

Release of ansible-mackerel-agent v0.8.4

  • A task to install mkr command was added
  • Support added for action specification with the check plugin installation task