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Perhaps trivial problem but important to me
by jefflpost＠twc.com 18 Jan '23

18 Jan '23

I have two computers: CentOS 7 (KDE 4) and CentOS 8 (KDE 5). I'm also an avid Doom player (yeah, I'm an old geezer). On C7 using prboom v 2.5.0 and a graphical interface I wrote to select a wad file to play without using the command line, everything works fine. On C8, using the same prboom 2.5.0, graphical interface, and the same SDL libraries, the video is "jerky" - every 2 seconds or so the video stops for a fraction of a second and then restarts. This makes game play a bit irritating. This problem does not occur when playing videos with mplayer, also using a graphical interface I wrote to select files to play. I've looked at system settings, checked process usage using ps and can find no reason why there is a difference between playing Doom in C7 and C8. Any suggestions will be greatly appreciated. Jeff

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CentOS Stream 9 virt-install via loop-mounted ISO fails
by Jos Vos 17 Jan '23

17 Jan '23

Hi, I've loop-mounted the latest CentOS Stream 9 DVD ISO and try to do a virt-install (2.0.x for some reason) as non-root user (libvirt group member) using --location with the mount path, but then I come across the problem decribed here: https://bugzilla.redhat.com/show_bug.cgi?id=2022630 That is, I see on the console "Starting dracut initqueue hook...", then it stalls for a while, and then I get all the timeouts described in the bug report. Any suggestions for a workaround (with virt-install 2.0.x and as non-root user)? Background: Dor some reason I need to use virt-install 2.0.x as non-root to install CentOS Stream 9. The "normal" way, specifying a URL with --location, does not work because it fails with permission denied for losetup. It looks like virt-install 3.2.x does not have this problem anymore. Thanks, -- -- Jos Vos <jos(a)xos.nl> -- X/OS Experts in Open Systems BV | Office: +31 20 6938364 -- Amsterdam, The Netherlands | Mobile: +31 6 26216181

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Upgrading system from non-RAID to RAID1
by H 15 Jan '23

15 Jan '23

I plan to upgrade an existing C7 computer which currently has one 256 GB SSD to use mdadmin software RAID1 after adding two 4 TB M2. SSDs, the rest of the system remaining the same. The system also has one additional internal and one external harddisk but these should not be touched. The system will continue to run C7. If I remember correctly, the existing SSD does not use a M2. slot so they should be available for the new 4GB SSDs while the old SSD remains in place. If I read the output from gparted correctly, this existing SSD is partitioned as follows: - EFI system partition 260 MB and mounted as /boot/efi (formatted as FAT32). - boot partition 1 GB and mounted as /boot (formatted as xfs). - /root, swap and /home seem to coexist on a LUKS encrypted partitition using LVM2 PV. My current plan is to: - Use clonezilla to make individual backups of all partitions above. - Install the two M2. SSDs. - Use an external disk tool to partition the two new M2. SSDs as follows: -- Create a RAID1 partition for /boot - same size as current, ie 260 MB -- Create a RAID1 partition for /boot/efi - same size as current, ie 1 GB -- Create a RAID1 partition for LVM2 and LUKS - the rest of the 4 TB SSD Questions: - I do not see any benefit to breaking up the LVM2/LUKS partition containing /root, /swap and /home into more than one RAID1 partition or am I wrong? If the SSD fails, the entire SSD would fail and break the system, hence I might as well keep it as one single RAID1 partition, or? - Is the next step after the RAID1 partitioning above then to do a minimal install of C7 followed by using clonezilla to restoring the LVM2/LUKS partition?? - Any advice on using clonezilla? Or the external partitioning tool? - Finally, since these new SSDs are huge, perhaps I should take the opportunity to increase the space for both /root and /swap? - /root is 50 GB - should I increase it to eg 100 GB? - The system currently has 32 GB of memory but I will likely upgrade it to 64 GB (or even 128 GB), perhaps I should at this time already increase the /swap space to 64 GB/128 GB? Looking forward to advice and suggestions!

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Centos Stream 9 module list
by Jos Vos 14 Jan '23

14 Jan '23

Hi, When I do "dnf module list --all" on CentOS Stream 8, I also see the stream versions installed by default, e.g. postgresql 10. But on CentOS Stream 9, I only see the newer stream version, like postgresql 15 and nodejs 18 (and not postgresql 13 and nodejs 16). Can anyone explain what's happening here? Thanks, -- -- Jos Vos <jos(a)xos.nl> -- X/OS Experts in Open Systems BV | Office: +31 20 6938364 -- Amsterdam, The Netherlands | Mobile: +31 6 26216181

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failed: Could not start storage pool: cannot open directory: ... No such file or directory
by Kaushal Shriyan 14 Jan '23

14 Jan '23

Hi, # cat /etc/redhat-release CentOS Linux release 7.9.2009 (Core) #virt-install --version 1.5.0 # # ls -l /var/lib/libvirt/isos/ total 8302356 -rw-r--r--. 1 root root 4712300544 Aug 31 2021 CentOS-7-x86_64-DVD-2009.iso -rw-r--r--. 1 qemu qemu 990904320 Aug 11 2021 ubuntu-18.04.5-live-server-amd64.iso -rw-r--r--. 1 qemu qemu 1331691520 Feb 23 2022 ubuntu-20.04.4-live-server-amd64.iso -rw-r--r--. 1 qemu qemu 1466714112 Jun 28 2022 ubuntu-22.04-live-server-amd64.iso # virt-install --name demoreactui --ram 8096 --disk path=/linuxkvmguestosdisk/demoreactui.img,size=20 --vcpus 2 --os-variant ubuntu20.04 --network bridge=br0 --graphics none --console pty,target_type=serial --location /var/lib/libvirt/isos/ubuntu-20.04.4-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper/initrd --extra-args 'console=ttyS0,115200n8 serial' ERROR Error validating install location: Validating install media '/var/lib/libvirt/isos/ubuntu-20.04.4-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper/initrd' failed: Could not start storage pool: cannot open directory '/var/lib/libvirt/isos/ubuntu-20.04.4-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper': No such file or directory Any clue and I look forward to hearing from you. Thanks in advance. Best Regards, Kaushal

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Re: [CentOS] Looking for a RAID1 box
by Robert Moskowitz 12 Jan '23

12 Jan '23

I have found a: HPE 873830-S01 ProLiant MicroServer Gen10 for <$300 without drives. If I can believe the seller, it has a AMD Opteron X3216 Dual-core (2 Core) 1.6GHz and 8GB Installed. It has 4 3.5" bays. and 1? "Media" bay? https://www.servertechsupply.com/873830-s01/ this could well be acceptable. Got to find out power draw. Looks like ~40W. Any input on issues of OS install? Do I go with separate OS and data RAID1 sets? Also HPE is ClearOS. I ran ClearOS6 for years before going with QNAP turnkey. Perhaps current ClearOS is better, but it does not handle multi-domain email as I need. Or it did not. So I am going to install my own CentOS variant and iRedMail... thanks On 1/5/23 13:08, Jon LaBadie wrote: > On Thu, Jan 05, 2023 at 08:18:08AM -0500, Robert Moskowitz wrote: >> Proliant gen8 does NOT have UEFI. >> >> So I think this means I better move up to the gen10... >> > > I'm pleased with my Gen 10+ (Plus). Pricer than I thought > you want. > > I like the "no power supply", just an external brick. > Quiet. I put in a PCI card to use 2 NVMe sticks, one for > system and one for /home. You can also boot from an internal > usb port like a thumb drive permanently installed. > > Carriers for 2.5inch SSD drives work fine so with few fans, > no drive motors, could be quite low power. > > Mine acts as email server, local caching DNS server (dnsmasq) > and Amanda backup server. > > Jon >

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Help with an HP Proliant gen10 plus?
by Robert Moskowitz 10 Jan '23

10 Jan '23

Just starting and trying to boot off the SPP firmware update ISO image on a USB stick. I made the stick with: # mkfs.vfat /dev/sdb # dd bs=4M if=P52581_001_gen10spp-2022.09.01.00-SPP2022090100.2022_0930.1.iso of=/dev/sdb status=progress The usb drive is 16GB and the iso is 9GB. seem to boot from it and go into auto install of firmware then died with starting initrd... warning!!! Unable to mount the file system [cdrom] warning!!! Unable to mount the file system Preboot maintence mode /bin/ash: can't access tty: job control turned off and at # prompt. There is no cdrom on the gen10 plus. Only in internal bootable usb port.

3 4

CentOS cloud images, cloud-init
by Jack Bailey 09 Jan '23

09 Jan '23

Hello List, At this link, https://cloud.centos.org/altarch/7/images/ I'm trying to use the latest image CentOS-7-x86_64-GenericCloud.qcow2c I cannot log in to the VM because cloud-init did not run. vSphere says open-vm-tools is not running. After having broken into the VM, I see open-vm-tools is installed but not enabled. Does anyone know why/why not? I could be mistaken, but I'm thinking maybe that's why cloud-init doesn't run. Jack

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Looking for a RAID1 box
by Robert Moskowitz 05 Jan '23

05 Jan '23

Help? I am looking for a box I can drop Centos or one of the spinoffs that: Has RAID1 internal (not an external USB RAID thing) Can be software or hardware small (4TB/drive fine) and low power I plan to use it ONLY for email server. perhaps iRedMail I have spent a lot of time looking and not finding any such piece of metal. All I find are NAS boxes with their own OS. thanks Bob (frustrated)

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Re: [CentOS] Looking for a RAID1 box
by Michael Schumacher 05 Jan '23

05 Jan '23

Hallo Kenneth, ... > That has 2x 2.5 Gbps ports, which would be nice for a simple home router. Is there a 3x or 4x 1 Gbps version? I was considering a Firewalla with 4x 2.5 Gbps ports, as I have two ISPs for redundancy. (One is 1 Gbps symmetric.) But they're about 2.5x that price. Review: Yes Sir, there is an add-on board for the H3+, https://www.hardkernel.com/shop/h2-net-card/ that gives four extra 2.5GBps ports. -- Mit freundlichen Grüßen, Michael Schumacher

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