Better boot interface detection using BOOTIF argument

Registered by Dmitry Tantsur

Discoverd currently by default adds ports only for interfaces that received IP addresses. While handy, it does not fully solve problem with wrong ports, especially with ramdisks that use DHCP on all interfaces.

When using 'IPAPPEND 2' or 'IPAPPEND 3' a BOOTIF argument is added to kernel command line.
* Modify ramdisk to pass it to discoverd as boot_interface value
* Add and document option (enabled by default) to create port only for this boot interface, if it's present

see http://www.syslinux.org/wiki/index.php/SYSLINUX (find IPAPPEND heading)

Blueprint information

Status:
Complete
Approver:
None
Priority:
Essential
Drafter:
Dmitry Tantsur
Direction:
Approved
Assignee:
Dmitry Tantsur
Definition:
Approved
Series goal:
Accepted for kilo
Implementation:
Implemented
Milestone target:
milestone icon 1.1.0
Started by
Dmitry Tantsur
Completed by
Dmitry Tantsur

Related branches

Sprints

Whiteboard

Gerrit topic: https://review.openstack.org/#q,topic:bp/better-boot-interface-detection,n,z

Addressed by: https://review.openstack.org/153240
    Refactor ValidateInterfaces plugin

Addressed by: https://review.openstack.org/153261
    Allow ramdisk to specify PXE boot interface

Addressed by: https://review.openstack.org/154027
    Fix detection of PXELINUX-provided boot interface

Addressed by: https://review.openstack.org/154157
    Functional test for boot interface detection

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Work Items

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