This page (revision-3) was last changed on 17-Feb-2022 15:10 by Olaf Bohlen

This page was created on 16-Feb-2022 18:15 by Olaf Bohlen

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Version management

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At line 251 changed one line
!! Download required material
!! Installing OpenShift
! Download required material
At line 293 added one line
! Create Ignition Files
At line 295 added 54 lines
After creating the install-config.yaml we can process this and create ignition files for Red Hat CoreOS. We first create manifests (which you could review or customize, but we don't) and then we create ignitions:
{{{
[localadm@bastion ocp4]$ ls
install-config.yaml
[localadm@bastion ocp4]$ openshift-install create manifests
[...]
[localadm@bastion ocp4]$ openshift-install create ignition-configs
[...]
[localadm@bastion ocp4]$ ls
auth metadata.json worker.ign bootstrap.ign master.ign
}}}
The ignition files (*.ign) need to be pushed to a web-server that is accessible for the OpenShift nodes.
! Set up PXE boot
The relevant part of my dhcpd4.conf looks like this:
{{{
subnet 172.18.0.0 netmask 255.255.252.0 {
range 172.18.3.101 172.18.3.101;
option routers 172.18.0.200;
option domain-name "srv.home.eenfach.de";
option domain-search "srv.home.eenfach.de","home.eenfach.de","eenfach.de";
option domain-name-servers 172.18.1.53;
option subnet-mask 255.255.224.0;
option ntp-servers 192.53.103.108,192.53.103.104,192.53.103.103;
group {
filename "shimx64.efi";
next-server 172.18.1.67;
host master00.ocp4.home.eenfach.de {
hardware ethernet 2:8:20:61:3b:13;
fixed-address 172.18.3.10;
option host-name "master00";
[...]
}
}
}
}}}
Of course you want to put all masters, workers and the bootstrap in there also.
Then you need to get the shimx64.efi and grubx64.efi from the RHEL shim-x64.x86_64 rpm. I just installed it on the bastion and copied it to the /tftpboot on my DHCP Server.
The reason is that bhyve boots UEFI only and the classic pxelinux from RHEL only supports BIOS boots, so we use the grub shim boot.
Create grub configs for every MAC.
An example for a Master:
{{{
root@skirnir:/tftpboot# cat grub.cfg-01-02-08-20-22-c1-10
menuentry 'Master: Install Red Hat Enterprise Linux CoreOS' --class fedora --class gnu-linux --class gnu --class os {
linuxefi rhcos-4.6.1-x86_64-live-kernel-x86_64 coreos.inst.install_dev=/dev/vda coreos.live.rootfs_url=http://172.18.1.80/install/ocp4/rhcos-4.6.1-x86_64-live-rootfs.x86_64.img coreos.inst.ignition_url=http://172.18.1.80/install/ocp4/ignitions/master.ign console=tty0 console=ttyS0
initrdefi rhcos-4.6.1-x86_64-live-initramfs.x86_64.img
}
}}}
This page (revision-3) was last changed on 17-Feb-2022 15:10 by Olaf BohlenTop