Red Hat Summit Red Hat SummitApoyoConsolaDesarrolladoresIniciar una pruebaContacto

Este contenido no está disponible en el idioma seleccionado.

3.10. iSCSI interface and offload support in Compute

Note
iSCSI interface and offload support is only present since Kilo.
Compute supports open-iscsi iSCSI interfaces for offload cards. Offload hardware must be present and configured on every compute node where offload is desired. Once an open-iscsi interface is configured, the iface name (iface.iscsi_ifacename) should be passed to libvirt via the iscsi_iface parameter for use. All iscsi sessions will be bound to this iSCSI interface.
Currently supported transports (iface.transport_name) are be2iscsi, bnx2i, cxgb3i, cxgb4i, qla4xxx, ocs . No configuration changes are needed outside of Compute node.
iSER is currently supported via the separate iSER LibvirtISERVolumeDriver and will be rejected if used via the iscsi_iface parameter.

3.10.1. iSCSI iface configuration
Copiar enlace

  • Note the distinction between the transport name (iface.transport_name) and iface name (iface.iscsi_ifacename). The actual iface name must be specified via the iscsi_iface parameter to libvirt for offload to work.
  • The default name for an iscsi iface (open-iscsi parameter iface.iscsi_ifacename) is in the format transport_name.hwaddress when generated by iscsiadm.
  • iscsiadm can be used to view and generate current iface configuration. Every network interface that supports an open-iscsi transport can have one or more iscsi ifaces associated with it. If no ifaces have been configured for a network interface supported by an open-iscsi transport, this command will create a default iface configuration for that network interface. For example : 
    # iscsiadm -m iface
   default tcp,<empty>,<empty>,<empty>,<empty>
   iser iser,<empty>,<empty>,<empty>,<empty>
   bnx2i.00:05:b5:d2:a0:c2 bnx2i,00:05:b5:d2:a0:c2,5.10.10.20,<empty>,<empty>
   cxgb4i.00:07:43:28:b2:58 cxgb4i,00:07:43:28:b2:58,102.50.50.80,<empty>,<empty>
   qla4xxx.00:c0:dd:08:63:ea qla4xxx,00:c0:dd:08:63:ea,20.15.0.9,<empty>,<empty>
    Copy to Clipboard Toggle word wrap
    The output is in the format : iface_name transport_name,hwaddress,ipaddress,net_ifacename,initiatorname.
  • Individual iface configuration can be viewed via 
    # iscsiadm -m iface -I IFACE_NAME
   # BEGIN RECORD 2.0-873
   iface.iscsi_ifacename = cxgb4i.00:07:43:28:b2:58
   iface.net_ifacename = <empty>
   iface.ipaddress = 102.50.50.80
   iface.hwaddress = 00:07:43:28:b2:58
   iface.transport_name = cxgb4i
   iface.initiatorname = <empty>
   # END RECORD
    Copy to Clipboard Toggle word wrap
    Configuration can be updated as desired via 
    # iscsiadm -m iface-I IFACE_NAME--op=update -n iface.SETTING -v VALUE
    Copy to Clipboard Toggle word wrap
  • All iface configurations need a minimum of iface.iface_name, iface.transport_name and iface.hwaddress to be correctly configured to work. Some transports may require iface.ipaddress and iface.net_ifacename as well to bind correctly.
    Detailed configuration instructions can be found in the Linux* Open-iSCSI README file .
Volver arriba
Red Hat logoGithubredditYoutubeTwitter

Aprender

Pruebe, compre y venda

Comunidades

Acerca de la documentación de Red Hat

Ayudamos a los usuarios de Red Hat a innovar y alcanzar sus objetivos con nuestros productos y servicios con contenido en el que pueden confiar. Explore nuestras recientes actualizaciones.

Hacer que el código abierto sea más inclusivo

Red Hat se compromete a reemplazar el lenguaje problemático en nuestro código, documentación y propiedades web. Para más detalles, consulte el Blog de Red Hat.

Acerca de Red Hat

Ofrecemos soluciones reforzadas que facilitan a las empresas trabajar en plataformas y entornos, desde el centro de datos central hasta el perímetro de la red.

Theme

© 2025 Red Hat