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17.4. Configuring the Red Hat Virtualization Manager to Send SNMP Traps

Configure your Red Hat Virtualization Manager to send Simple Network Management Protocol traps to one or more external SNMP managers. SNMP traps contain system event information; they are used to monitor your Red Hat Virtualization environment. The number and type of traps sent to the SNMP manager can be defined within the Red Hat Virtualization Manager.

This procedure assumes that you have configured one or more external SNMP managers to receive traps, and that you have the following details:

  • The IP addresses or fully qualified domain names of machines that will act as SNMP managers. Optionally, determine the port through which the manager receives trap notifications; by default, this is UDP port 162.
  • The SNMP community. Multiple SNMP managers can belong to a single community. Management systems and agents can communicate only if they are within the same community. The default community is public.
  • The trap object identifier for alerts. The Red Hat Virtualization Manager provides a default OID of 1.3.6.1.4.1.2312.13.1.1. All trap types are sent, appended with event information, to the SNMP manager when this OID is defined. Note that changing the default trap prevents generated traps from complying with the Manager’s management information base.
Note

The Red Hat Virtualization Manager provides management information bases at /usr/share/doc/ovirt-engine/mibs/OVIRT-MIB.txt and /usr/share/doc/ovirt-engine/mibs/REDHAT-MIB.txt. Load the MIBs in your SNMP manager before proceeding.

Default SNMP configuration values exist on the Manager in the events notification daemon configuration file /usr/share/ovirt-engine/services/ovirt-engine-notifier/ovirt-engine-notifier.conf. The values outlined in the following procedure are based on the default or example values provided in that file. It is recommended that you define an override file, rather than edit the ovirt-engine-notifier.conf file, to persist your configuration options after changes such as system upgrades.

Configuring SNMP Traps on the Manager

  1. On the Manager, create the SNMP configuration file: 

    # vi /etc/ovirt-engine/notifier/notifier.conf.d/20-snmp.conf

  2. Specify the SNMP manager(s), the SNMP community, and the OID in the following format: 

    SNMP_MANAGERS="manager1.example.com manager2.example.com:162"
SNMP_COMMUNITY=public
SNMP_OID=1.3.6.1.4.1.2312.13.1.1

  3. Define which events to send to the SNMP manager:

    Example 17.1. Event Examples

    Send all events to the default SNMP profile: 

    FILTER="include:*(snmp:) ${FILTER}"

    Send all events with the severity ERROR or ALERT to the default SNMP profile: 

    FILTER="include:*:ERROR(snmp:) ${FILTER}"
     
    FILTER="include:*:ALERT(snmp:) ${FILTER}"

    Send events for VDC_START to the specified email address: 

    FILTER="include:VDC_START(snmp:mail@example.com) ${FILTER}"

    Send events for everything but VDC_START to the default SNMP profile: 

    FILTER="exclude:VDC_START include:*(snmp:) ${FILTER}"

    This the default filter defined in ovirt-engine-notifier.conf; if you do not disable this filter or apply overriding filters, no notifications will be sent: 

    FILTER="exclude:*"

    VDC_START is an example of the audit log messages available. A full list of audit log messages can be found in /usr/share/doc/ovirt-engine/AuditLogMessages.properties. Alternatively, filter results within your SNMP manager.

  4. Save the file.

  5. Start the ovirt-engine-notifier service, and ensure that this service starts on boot: 

    # systemctl start ovirt-engine-notifier.service
# systemctl enable ovirt-engine-notifier.service

Check your SNMP manager to ensure that traps are being received.

Note

SNMP_MANAGERS, MAIL_SERVER, or both must be properly defined in /usr/share/ovirt-engine/services/ovirt-engine-notifier/ovirt-engine-notifier.conf or in an override file in order for the notifier service to run.

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