On Tue, May 24, 2016 at 01:30:19PM -0700, Christopher Larson wrote: > On Tue, May 24, 2016 at 1:16 PM, Ed Bartosh <ed.bart...@linux.intel.com> > wrote: > > > On Tue, May 24, 2016 at 12:56:39PM -0700, Christopher Larson wrote: > > > On Tue, May 24, 2016 at 12:51 PM, Ed Bartosh <ed.bart...@linux.intel.com > > > > > > wrote: > > > > > > > On Mon, May 23, 2016 at 08:13:28AM -0400, Ian Geiser wrote: > > > > > > On Thu, May 19, 2016 at 05:52:45AM -0400, Ian Geiser wrote: > > > > > > > Greetings, I am trying to learn "wic" and have been confused as > > how > > > > to create a "live" style image. I am following " > > > > > > http://www.yoctoproject.org/docs/1.5.2/dev-manual/dev-manual.html#creating-partitioned-images > > " > > > > but am getting confused on the target to use to create the a file > > system > > > > that has a single squashfs file containing my root file system. > > > > > > > > > > > > > > My desired partition layout is as follows: > > > > > > > 40MiB 40MiB 300MiB > > > > > > > > > > > +--------------------+-----------------+-----------------------------+ > > > > > > > | BOOT (esp) | DATA (fat) | ROOT (live) > > > > | > > > > > > > > > > > +--------------------+-----------------+-----------------------------+ > > > > > > > > > > > > > > BOOT - efi boot partition with kernel and initramfs > > > > > > > DATA - generic fat filesystem to hold configuration files > > > > > > > ROOT - an ext4 filesystem that contains a single os.img, which > > is a > > > > squashfs file. > > > > > > > > > > > > > > I have ROOT and DATA figured out but I am at a loss as how to > > > > generate the os.img file and copy it into ROOT. If I generate the > > os.img > > > > file with bitbake and then use the "-r" option to manually supply a > > > > directory structure it works, but I would rather have it done from a > > wks > > > > file for automation reasons. > > > > > > > > > > > > > > Any hints? > > > > > > I'd suggest to use wic image type and generate your image by > > bitbake. > > > > > > You can find example wic-image-minimal.bb and > > wic-image-minimal.wks > > > > in ../meta-selftest/recipes-test/images/ > > > > > > > > > > > This is where I started. I was able to make it work but not with my > > > > configuration above. It looks like I can use a type of "fsimage" for > > my > > > > "ROOT" partition, but I have not been able to figure out the syntax > > there > > > > yet. For "BOOT" I am at a complete loss. In theory "bootimg-efi" but > > > > there doesn't seem to be a way to provide an initramfs. > > > > > > > > How about creating recipe to prepare content or your boot partition and > > > > then using --source rootfs --rootfs-dir=<your recipe> ? > > > > This is much more generic way of creating partitioned images from my > > > > point of view. Image recipes should take care of content and wic takes > > > > care of > > > > putting that content into partitions according to the partitioning > > > > scheme described in .wks > > > > > > > > Does it make sense for you? > > > > > > > > > > > > > > > You can probably do the same by using wic plugins, but I'd not > > suggest > > > > > > to go this way. Using wic image type is simpler, more consistent, > > > > easier to do and provides higher level of automation. > > > > > > > > > > Is using the wic image type and a plugin mutually exclusive? > > > > No, not at all. However, I personally found the way I described above > > > > more consistent, flexible and easy to implement and maintain. > > > > > > > > > > The thing is, it's likely the machine/bsp setting the WKS_FILE, yet in > > > OE/yocto we prefer machine/distro/image to be orthogonal. If you're > > > injecting machine specific logic into an image, that image isn't going to > > > be generally useful for all machines, and so violates our philosophy. > > > > I'm not sure I understand why it has to be machine-dependent setting in > > the .wks Can you give some example? > > > I don't understand the question. The .wks is machine specific by > definition. It includes knowledge of the expectations of the boot process > on the hardware the image is used on, what the boot device name is, etc.
Sorry for not being clear. Now I understand what you mean. I didn't know about this philosopy when I implemented handling wic image types in image core classes. Are you suggesting to remove it and keep using wic as only as a separate tool? -- Regards, Ed -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core