f9ae319fdd
We have started down the path of eradicating tinyipa usage and testing because it was bifrucating our contirbutor resources and focus now that we have also been able to fix some of the CI jobs to be a bit more scalable. This does mean we're doing more with dib based images and they are larger, but we're willing ot pay that tax as a project for consistency and CI job stability. Change-Id: I8f96d106a85f6ab4493785e88955196da08af8e9 Signed-off-by: Julia Kreger <juliaashleykreger@gmail.com>
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Rescue mode
Overview
Rescue mode is a feature that can be used to boot a ramdisk for a tenant in case the machine is otherwise inaccessible. For example, if there's a disk failure that prevents access to another operating system, rescue mode can be used to diagnose and fix the problem.
Support in ironic-python-agent images
Rescue is initiated when ironic-conductor sends the
finalize_rescue command to ironic-python-agent. A user
rescue is created with a password provided as an argument
to this command. DHCP is then configured to facilitate network
connectivity, thus enabling a user to login to the machine in rescue
mode.
Warning
Rescue mode exposes the contents of the ramdisk to the tenant. Ensure that any rescue image you build does not contain secrets (e.g. sensitive clean steps, proprietary firmware blobs).
The below has information about supported images that may be built to use rescue mode.
DIB
The DIB image supports rescue mode when used with DHCP tenant networks.
After the finalize_rescue command completes, DHCP will
be configured on all network interfaces, and a rescue user
will be created with the specified rescue_password.