SNMP driver

The SNMP hardware type enables control of power distribution units of the type frequently found in data centre racks. PDUs frequently have a management ethernet interface and SNMP support enabling control of the power outlets.

The SNMP power interface works with the PXE boot interface for network deployment and network-configured boot.

Note

Unlike most of the other power interfaces, the SNMP power interface does not have a corresponding management interface. The SNMP hardware type uses the noop management interface instead.

List of supported devices

This is a non-exhaustive list of supported devices. Any device not listed in this table could possibly work using a similar driver.

Please report any device status.

Manufacturer

Model

Supported?

Driver name

APC

AP7920

Yes

apc_masterswitch

APC

AP9606

Yes

apc_masterswitch

APC

AP9225

Yes

apc_masterswitchplus

APC

AP7155

Yes

apc_rackpdu

APC

AP7900

Yes

apc_rackpdu

APC

AP7901

Yes

apc_rackpdu

APC

AP7902

Yes

apc_rackpdu

APC

AP7911a

Yes

apc_rackpdu

APC

AP7921

Yes

apc_rackpdu

APC

AP7922

Yes

apc_rackpdu

APC

AP7930

Yes

apc_rackpdu

APC

AP7931

Yes

apc_rackpdu

APC

AP7932

Yes

apc_rackpdu

APC

AP7940

Yes

apc_rackpdu

APC

AP7941

Yes

apc_rackpdu

APC

AP7951

Yes

apc_rackpdu

APC

AP7960

Yes

apc_rackpdu

APC

AP7990

Yes

apc_rackpdu

APC

AP7998

Yes

apc_rackpdu

APC

AP8941

Yes

apc_rackpdu

APC

AP8953

Yes

apc_rackpdu

APC

AP8959

Yes

apc_rackpdu

APC

AP8961

Yes

apc_rackpdu

APC

AP8965

Yes

apc_rackpdu

Aten

all?

Yes

aten

CyberPower

all?

Untested

cyberpower

EatonPower

all?

Untested

eatonpower

Teltronix

all?

Yes

teltronix

BayTech

MRP27

Yes

baytech_mrp27

Software Requirements

  • The PySNMP package must be installed, variously referred to as pysnmp or python-pysnmp

Enabling the SNMP Hardware Type

  1. Add snmp to the list of enabled_hardware_types in ironic.conf. Also update enabled_management_interfaces and enabled_power_interfaces in ironic.conf as shown below:

    [DEFAULT]
enabled_hardware_types = snmp
enabled_management_interfaces = noop
enabled_power_interfaces = snmp

  2. To enable the network boot fallback, update enable_netboot_fallback in ironic.conf:

    [pxe]
enable_netboot_fallback = True

    Note

    It is important to enable the fallback as SNMP hardware type does not support setting of boot devices. When booting in legacy (BIOS) mode, the generated network booting artifact will force booting from local disk. In UEFI mode, Ironic will configure the boot order using UEFI variables.

  3. Restart the Ironic conductor service.

    service ironic-conductor restart

Ironic Node Configuration

Nodes configured to use the SNMP hardware type should have the driver field set to the hardware type snmp.

The following property values have to be added to the node’s driver_info field:

  • snmp_driver: PDU manufacturer driver name or auto to automatically choose ironic snmp driver based on SNMPv2-MIB::sysObjectID value as reported by PDU.

  • snmp_address: the IPv4 address of the PDU controlling this node.

  • snmp_port: (optional) A non-standard UDP port to use for SNMP operations. If not specified, the default port (161) is used.

  • snmp_outlet: The power outlet on the PDU (1-based indexing).

  • snmp_version: (optional) SNMP protocol version (permitted values 1, 2c or 3). If not specified, SNMPv1 is chosen.

  • snmp_community: (Required for SNMPv1/SNMPv2c unless snmp_community_read and/or snmp_community_write properties are present in which case the latter take over) SNMP community name parameter for reads and writes to the PDU.

  • snmp_community_read: SNMP community name parameter for reads to the PDU. Takes precedence over the snmp_community property.

  • snmp_community_write: SNMP community name parameter for writes to the PDU. Takes precedence over the snmp_community property.

  • snmp_user: (Required for SNMPv3) SNMPv3 User-based Security Model (USM) user name. Synonym for now obsolete snmp_security parameter.

  • snmp_auth_protocol: SNMPv3 message authentication protocol ID. Valid values include: none, md5, sha for all pysnmp versions and additionally sha224, sha256, sha384, sha512 for pysnmp versions 4.4.1 and later. Default is none unless snmp_auth_key is provided. In the latter case md5 is the default.

  • snmp_auth_key: SNMPv3 message authentication key. Must be 8+ characters long. Required when message authentication is used.

  • snmp_priv_protocol: SNMPv3 message privacy (encryption) protocol ID. Valid values include: none, des, 3des, aes, aes192, aes256 for all pysnmp version and additionally aes192blmt, aes256blmt for pysnmp versions 4.4.3+. Note that message privacy requires using message authentication. Default is none unless snmp_priv_key is provided. In the latter case des is the default.

  • snmp_priv_key: SNMPv3 message privacy (encryption) key. Must be 8+ characters long. Required when message encryption is used.

  • snmp_context_engine_id: SNMPv3 context engine ID. Default is the value of authoritative engine ID.

  • snmp_context_name: SNMPv3 context name. Default is an empty string.

The following command can be used to enroll a node with the snmp hardware type:

baremetal node create \
--driver snmp --driver-info snmp_driver=<pdu_manufacturer> \
--driver-info snmp_address=<ip_address> \
--driver-info snmp_outlet=<outlet_index> \
--driver-info snmp_community=<community_string>