Hi, If I build my image based on Yocto Warrior based for example on meta-tegra. What would be the proper procedure to upgrade the system to Zeus hypothetically. Update all the metas to zeus branches : meta-mender meta-mender-community meta-tegra Build the new image (on condition of having it ru…

Hi @Austriker in theory that is all however sometimes there are changes in the Yocto branches that may require one time extra steps for the upgrade. For instance, the default partition layout changed several versions ago, resulting in different partition numbers being required on systems that had u…

Don’t worry, there are no partition layout changes between thud and warrior AFAIK. That was just an example from even earlier versions. It’s worth checking out the changelog between the two though. In particular, there is a section about “mender-migrate-configuration” that might be of interest. I do…

And to add a bit more color, the change mentioned above was fixed by simply adjusting the partition numbers in the bitbake variables. But, that said, we cannot guarantee that no matter what changes are made in the future with Yocto we can support them without extra efforts. We’ll have to take each…

GPT partitions support labels for each partition. You can label them whatever you want. If update software, mount points, rootfs selection all use labels (they can!), then there is no longer any dependency on the precise number and order of partitions. If something keeps breaking because partitio…

Can the bootloader identify partitions by labels?

Yes, both Barebot and U-Boot can parse GPT tables and identify a partition by label or by UUID. The kernel can do the same. You can tell it what rootfs to use with root=PARTLABEL=rootA or also with root=PARTUUID=xxxx-xxxx-xxxx. However, barebox has a bootm.appendroot option that’s even better if…

Handling Yocto version changes

General Discussions

Austriker February 23, 2020, 6:23pm 3

Hi @drewmoseley, thank you for you answer. It is the case for Thud to Warrior apparently so we are working directly on warrior. The case where the partition layout changes how do we handle it. Do you need to reflash the device ?

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Handling Yocto version changes

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