When IPA gets a non-raw image, it performs an on-the-fly conversion
using qemu-img convert, as well as running qemu-img frequently to get
basic information about the image before validating it.
Now, we ensure that before any qemu-img calls are made, that we have
inspected the image for safety and pass through the detected format.
If given a disk_format=raw image and image streaming is enabled
(default), we retain the existing behavior of not inspecting it in
any way and streaming it bit-perfect to the device. In this case, we
never use qemu-based tools on the image at all.
If given a disk_format=raw image and image streaming is disabled, this
change fixes a bug where the image may have been converted if it was not
actually raw in the first place. We now stream these bit-perfect to the
device.
Adds two config options:
- [DEFAULT]/disable_deep_image_inspection, which can be set to "True" in
order to disable all security features. Do not do this.
- [DEFAULT]/permitted_image_formats, default raw,qcow2, for image types
IPA should accept.
Both of these configuration options are wired up to be set by the lookup
data returned by Ironic at lookup time.
This uses a image format inspection module imported from Nova; this
inspector will eventually live in oslo.utils, at which point we'll
migrate our usage of the inspector to it.
Closes-Bug: #2071740
Change-Id: I5254b80717cb5a7f9084e3eff32a00b968f987b7
A sector size of 512 was assumed and hardcoded, causing dd to fail when
it tried to write in chunks smaller than the sector size for disks with
4096 bytes sectors. The size of GPT in sectors also depends on sector size.
Change-Id: Ide5318eb503d728cff3221c26bebbd1c214f6995
With the iscsi deploy long gone, these modules are only used in IPA and
in fact represent a large part of its critical logic. Having them
separately sometimes makes fixing issues tricky if an interface of
a function needs changing.
This change imports the code mostly as it is, just removing run_as_root and
a deprecated function, as well as moving configuration options to config.py.
Also migrates one relevant function from ironic_lib.utils.
Change-Id: If8fae8210d85c61abb85c388b300e40a75d0531c
