=============
The alerts module can send simple alert messages about cluster health
-via e-mail. In the future, it will support other notification methods
+via e-mail. In the future, it will support other notification methods
as well.
:note: This module is *not* intended to be a robust monitoring
- solution. The fact that it is run as part of the Ceph cluster
+ solution. The fact that it is run as part of the Ceph cluster
itself is fundamentally limiting in that a failure of the
- ceph-mgr daemon prevents alerts from being sent. This module
+ ``ceph-mgr`` daemon prevents alerts from being sent. This module
can, however, be useful for standalone clusters that exist in
- environments where existing monitoring infrastructure does not
+ environments where other monitoring infrastructure does not
exist.
Enabling
--------
-The *alerts* module is enabled with::
+Enable the ``alerts`` module by running the following command:
- ceph mgr module enable alerts
+.. prompt:: bash #
+
+ ceph mgr module enable alerts
Configuration
-------------
-To configure SMTP, all of the following config options must be set::
+All of the following config options must be set when configuring SMTP. When
+setting ``mgr/alerts/smtp_destination``, specify multiple email addresses by
+separating them with commas.
+
+.. prompt:: bash #
+
+ ceph config set mgr mgr/alerts/smtp_host *<smtp-server>*
+ ceph config set mgr mgr/alerts/smtp_destination *<email-address-to-send-to>*
+ ceph config set mgr mgr/alerts/smtp_sender *<from-email-address>*
+
+The alerts module uses SSL and port 465 by default. These settings can be changed by running commands of the following forms:
- ceph config set mgr mgr/alerts/smtp_host *<smtp-server>*
- ceph config set mgr mgr/alerts/smtp_destination *<email-address-to-send-to>*
- ceph config set mgr mgr/alerts/smtp_sender *<from-email-address>*
+.. prompt:: bash #
-By default, the module will use SSL and port 465. To change that,::
+ ceph config set mgr mgr/alerts/smtp_ssl false # if not SSL
+ ceph config set mgr mgr/alerts/smtp_port *<port-number>* # if not 465
- ceph config set mgr mgr/alerts/smtp_ssl false # if not SSL
- ceph config set mgr mgr/alerts/smtp_port *<port-number>* # if not 465
+To authenticate to the SMTP server, you must set the user and password:
-To authenticate to the SMTP server, you must set the user and password::
+.. prompt:: bash #
- ceph config set mgr mgr/alerts/smtp_user *<username>*
- ceph config set mgr mgr/alerts/smtp_password *<password>*
+ ceph config set mgr mgr/alerts/smtp_user *<username>*
+ ceph config set mgr mgr/alerts/smtp_password *<password>*
-By default, the name in the ``From:`` line is simply ``Ceph``. To
-change that (e.g., to identify which cluster this is),::
+By default, the name in the ``From:`` line is simply ``Ceph``. To change this
+default (that is, to identify which cluster this is), run a command of the
+following form:
- ceph config set mgr mgr/alerts/smtp_from_name 'Ceph Cluster Foo'
+.. prompt:: bash #
-By default, the module will check the cluster health once per minute
-and, if there is a change, send a message. To change that
-frequency,::
+ ceph config set mgr mgr/alerts/smtp_from_name 'Ceph Cluster Foo'
- ceph config set mgr mgr/alerts/interval *<interval>* # e.g., "5m" for 5 minutes
+By default, the alert module checks the cluster health once per minute and
+sends a message if there a change to the cluster's health status. Change the
+frequency of the alert module's cluster health checks by running a command of the following form:
+
+.. prompt:: bash #
+
+ ceph config set mgr mgr/alerts/interval *<interval>* # e.g., "5m" for 5 minutes
Commands
--------
-To force an alert to be send immediately,::
+To force an alert to be sent immediately, run the following command:
+
+.. prompt:: bash #
- ceph alerts send
+ ceph alerts send