Discuss February 2018

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96 participants
72 discussions

What is best way of managing isolated network environment?
by Xinhuan Zheng 01 Feb '18

01 Feb '18

Hello, We need to manage isolated network environment so that even though host name and ip address could be same, but they are located in isolated network environment so that’s not a problem. However, that would be very challenging to build a server in such an isolated environment. For example, we could do kickstart to build a server in non-isolated network environment, but for isolated one, we don’t have such a kickstart server. If we had such one, that would mean we consume more resources for building server. What is best way of managing such isolated environment in terms of easily building servers? Thank you, - xinhuan

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Xen hypervisor on CentOS 7.4 with modern UEFI server not booting from grub
by John Naggets 01 Feb '18

01 Feb '18

Hi, I installed CentOS 7.4 on a modern Lenovo ThinkSystem SR630 server which uses UEFI. So far so good CentOS 7.4 works fine so then I went on to install the Xen hypervisor by following the instructions from the wiki (https://wiki.centos.org/HowTos/Xen/Xen4QuickStart) Unfortunately when I reboot after having installed the xen package the system does not boot into "CentOS Linux, with Xen hypervisor" from the grub menu prompt. I get the following error: Loading Xen 4.6.6-8.el7 ... error: can't find command `multiboot'. Loading Linux 4.9.75-29.el7.x86_64 ... error: can't find command `module'. Loading initial ramdisk ... error: can't find command `module'. Press any key to continue... The problem which I encounter here is exactly the same issue as described for Fedora in the RedHat bugs: https://bugzilla.redhat.com/show_bug.cgi?id=1286317 with the exception that for me it's CentOS 7.4 and that the workarounds as described in that bug do not work. Does anyone know how I can make my CentOS boot with the Xen hypervisor using UEFI? Thank you very much for your help. Best regards, John

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Discuss February 2018