Friday, September 27, 2019

CentOS 8.0.1905 network installs on bare metal via External Repos succeeded (non US location )

At the moment URLs  below worked for me as installation repositories. Hopefully this repositories will stay stable in a foreseeable future.  Particular source might be verified  when creating CentOS 8 virtual machine on any KVM Hypervisor, say on Ubuntu 18.05 Server . Even on UEFI box with high speed Internet connection network install runs faster then "dd" copying 7 GB file to USB pen and updating boot devices priority via UEFI interface.

http://mirror.corbina.net/pub/Linux/centos/8.0.1905/BaseOS/x86_64/os/
http://centos-mirror.rbc.ru/pub/centos/8.0.1905/BaseOS/x86_64/os/


At this point installer should be ready to start downloading packages  from the URL
pointed above after metadata gets obtained and the button "Begin installation" will become active on main panel. Go ahead and press it. Installer is supposed to download packages from repositories, printed above, preparing transaction from obtained source and run the transaction installing CentOS 8.0.1905 on bare metal. 



Enabling Nested KVM
Create new file /etc/modprobe.d/kvm-nested.conf
[root@ServerCentOS8 ~]# cat /etc/modprobe.d/kvm-nested.conf
options kvm-intel nested=1
options kvm-intel enable_shadow_vmcs=1
options kvm-intel enable_apicv=1
options kvm-intel ept=1
Next
[root@ServerCentOS8 ~]# modprobe -r kvm_intel
[root@ServerCentOS8 ~]# modprobe -a kvm_intel
Make sure nested KVM got enabled
[root@ServerCentOS8 ~]# cat /sys/module/kvm_intel/parameters/nested
Y
For already existing VMs update via `virsh edit VM-NAME` it's XML profile
as follows
 <cpu mode='host-passthrough' check='partial'/>


Run time snapshots with Qemu-kvm VM running on KVM-Hypervisor (CentOS 8.0.1905 based)
   
LibreOffice install :-
Download LibreOffice_6.3.1_Linux_x86-64_rpm.tar.gz
$ wget  \  http://download.documentfoundation.org/libreoffice/stable/6.3.1/rpm/x86_64/LibreOffice_6.3.1_Linux_x86-64_rpm.tar.gz
Set up as root
# tar -xvf LibreOffice_6.3.1_Linux_x86-64_rpm.tar.gz
# cd LibreOffice_6.3.1.2_Linux_x86-64_rpm
# yum localinstall RPMS/*.rpm

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