mknb is not run in xcat docker container.

[tingtli]

Install and start the xcat docker container robin2008/xcat2:2.14.6, there is no /tftpboot/pxelinux.cfg in it. run mknb manually could create the directory

[root@briggs01 /]# mknb ppc64
Creating genesis.fs.ppc64.gz in /tftpboot/xcat
[root@briggs01 /]# ls /tftpboot/pxelinux.cfg/p
10.0.0.0_8  127.0.0.0_8  172.10.0.0_16  172.11.0.0_16  172.12.0.0_16  172.17.0.0_16

[hu-weihua]

It will add a limitation in xCAT Docker Image document.

[robin2008]

mknb takes time to create the genesis rootfs, ask user to do it manually especially when he need a special genesis for Power9

[robin2008]

Known issue:

• Workaroud steps
  For users who want to use genesis do some actions like discovery, he need to run mknb <arch> again after the container is up.

The shipped xCAT Genesis Base package should work for x86_64 and P8 server. But if you want to it work on P9 server, the xCAT Genesis Base package should be rebuilt. You can do it with steps on a P9 server.

[robin2008]

@zet809 Is the base genesis could be built out with a P9 container?
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_atomic_host/7/html/getting_started_with_containers/get_started_with_docker_formatted_container_images#supported_architectures_for_containers_on_rhel

[jjohnson42]

For reference, I was planning to ultimately modify the layout such that the 'mknb' would be mostly unneeded unless customizing. The base and scripts would be separately compressed out of their respective rpms and the custom overlay (e.g. ssh key injection) would be a distinct archive that would be very fast to build).