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Alarm notifications

The exec line in health configuration defines an external script that will be called once the alarm is triggered. The default script is alarm-notify.sh.

You can change the default script globally by editing /etc/netdata/netdata.conf.

alarm-notify.sh is capable of sending notifications:

  • to multiple recipients
  • using multiple notification methods
  • filtering severity per recipient

It uses roles. For example sysadmin, webmaster, dba, etc.

Each alarm is assigned to one or more roles, using the to line of the alarm configuration. Then alarm-notify.sh uses its own configuration file /etc/netdata/health_alarm_notify.conf. To edit it on your system, run /etc/netdata/edit-config health_alarm_notify.conf and find the destination address of the notification for each method.

Each role may have one or more destinations.

So, for example the sysadmin role may send:

  1. emails to [email protected] and [email protected]
  2. pushover.net notifications to USERTOKENS A, B and C.
  3. pushbullet.com push notifications to [email protected] and [email protected]
  4. messages to slack.com channel #alarms and #systems.
  5. messages to Discord channels #alarms and #systems.

Configuration

Edit /etc/netdata/health_alarm_notify.conf by running /etc/netdata/edit-config health_alarm_notify.conf:

  • settings per notification method:

    all notification methods except email, require some configuration (i.e. API keys, tokens, destination rooms, channels, etc).

  • recipients per role per notification method

grep sysadmin /etc/netdata/health_alarm_notify.conf

role_recipients_email[sysadmin]="${DEFAULT_RECIPIENT_EMAIL}"
role_recipients_pushover[sysadmin]="${DEFAULT_RECIPIENT_PUSHOVER}"
role_recipients_pushbullet[sysadmin]="${DEFAULT_RECIPIENT_PUSHBULLET}"
role_recipients_telegram[sysadmin]="${DEFAULT_RECIPIENT_TELEGRAM}"
role_recipients_slack[sysadmin]="${DEFAULT_RECIPIENT_SLACK}"
...

Testing Notifications

You can run the following command by hand, to test alarms configuration:

# become user netdata
su -s /bin/bash netdata

# enable debugging info on the console
export NETDATA_ALARM_NOTIFY_DEBUG=1

# send test alarms to sysadmin
/usr/libexec/netdata/plugins.d/alarm-notify.sh test

# send test alarms to any role
/usr/libexec/netdata/plugins.d/alarm-notify.sh test "ROLE"

Note that in versions before 1.16, the plugins.d directory may be installed in a different location in certain OSs (e.g. under /usr/lib/netdata). You can always find the location of the alarm-notify.sh script in netdata.conf.

If you need to dig even deeper, you can trace the execution with bash -x. Note that in test mode, alarm-notify.sh calls itself with many more arguments. So first do

bash -x /usr/libexec/netdata/plugins.d/alarm-notify.sh test

Then look in the output for the alarm-notify.sh calls and run the one you want to trace with bash -x.