Discuss October 2021

discuss@lists.centos.org

39 participants
31 discussions

SSD for Centos SWAP /tmp & /var/ partition
by Keith Roberts 03 Sep '25

03 Sep '25

Has anyone actually used a SSD in a Centos setup? My little experiment with a s/h WD drive for /tmp and SWAP partitions kicked the bucket on Wednesday, when the poor WD drive caught the click-of-death. It was a s/h drive to start with and lasted about 4 months. But that was without the /var/log/ partition being written to it, as I mounted that back onto /var/log from the original drive. So I had to install another (WD) drive, and repartion it and rebuild my RPM package database, from the backed-up Packages file. That seems to be all OK now. I'm wondering if it would be a good idea to use a new SSD for moving all the disk i/o to, that Linux likes to do so often. Plus putting SWAP onto a decent SSD should speed things up somewhat. Here's a short video of a laptop fitted with a SSD drive booting macOS, compared to a similar laptop booting from the standard HDD. The laptop with the SSD boots and loads some apps in 28 seconds. The other one takes twice as long. http://eshop.macsales.com/shop/SSD/OWC/Mercury_Extreme_Pro_6G/?utm_source=t… Kind Regards, Keith Roberts ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------

33 96

Problems with CentOS 8 kickstart
by Hooton, Gerard 23 Jun '25

23 Jun '25

Hi All, I am having problems with a kickstart install of CentOS 8 When I try to do a completely automated install using PXE/UEFI it get to the point where it reads the kickstart config file. Then I see the following message "kickstart install Started cancel waiting for multipath siblings for nvme0n1" This is what I have in the kickstart file # Clear the Master Boot Record zerombr # Partition clearing information clearpart --all --initlabel autopart --nohome --type=lvm --fstype=xfs ================ When I install from a USB drive it works OK and I have the following in /dev/disk/by-id lrwxrwxrwx. 1 root root 13 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810 -> ../../nvme0n1 lrwxrwxrwx. 1 root root 13 Jul 5 10:28 nvme-eui.002538b11102f46d -> ../../nvme0n1 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 wwn-eui.002538b11102f46d-part3 -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810-part3 -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-eui.002538b11102f46d-part3 -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 lvm-pv-uuid-5Dg4mg-saHa-hJJ6-n5a8-MxBS-gdFi-5jPoNn -> ../../nvme0n1p3 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 wwn-eui.002538b11102f46d-part2 UNG_MZVL2512HCJQ-0-> ../../nvme0n1p2 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810-part2 -> ../../nvme0n1p2 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-eui.002538b11102f46d-part2 -> ../../nvme0n1p2 drwxr-xr-x. 2 root root 400 Jul 5 10:28 . lrwxrwxrwx. 1 root root 15 Jul 5 10:28 wwn-eui.002538b11102f46d-part1 -> ../../nvme0n1p1 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-SAMSUNG_MZVL2512HCJQ-00BL7_S64KNE0R161810-part1 -> ../../nvme0n1p1 lrwxrwxrwx. 1 root root 15 Jul 5 10:28 nvme-eui.002538b11102f46d-part1 -> ../../nvme0n1p1 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-uuid-LVM-qQok4M7AOo1TxZZ42GwZcbuVNBs0hnkKtEdtLjwJQyIdxJcSvPv8TEAjwYGMv6yU -> ../../dm-0 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-uuid-LVM-qQok4M7AOo1TxZZ42GwZcbuVNBs0hnkKAooqrczySYJyiHvUAUji9oScPN2cVi7J -> ../../dm-1 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-name-cs_uews027-swap -> ../../dm-1 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-name-cs_uews027-root -> ../../dm-0 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-uuid-LVM-qQok4M7AOo1TxZZ42GwZcbuVNBs0hnkK5HZXbR2ow5xKGuD7jVe4UPzZm2qRLLXI -> ../../dm-2 lrwxrwxrwx. 1 root root 10 Jul 5 11:07 dm-name-cs_uews027-home -> ../../dm-2 It's looks like that I am not doing the disk drive stuff in the config file correctly. -- Gerard Hooton. Senior Technical Officer School of Engineering. University College Cork. College Road. Cork. Ireland. Loc8: WDR-04-60G Tel: +353 21 4902296 Mobile: +353 852813491

3 7

Issues booting centos7 [dracut is failing to enable centos/root, centos/swap LVs]
by Yannis Milios 01 Feb '25

01 Feb '25

Hello, I'm having a strange problem booting a new centos7 installation. Below some background on this. [I have attached the tech details at the bottom of this message] I started a new CentOS7 installation on a VM, so far all good, o/s boots fine. Then I decided to increase VM disk size (initially was 10G) to 13G. Powered off the VM, increased the vhd via the hypervisor, booted from CentOS livecd, selected "recover my centos installation". Then I used the following sequence of commands to make the new vhd size "visible" to the o/s ... - ran fdisk /dev/sda and deleted partition 2. (This is the LVM partition where the o/s is stored. The first partition is /boot [xfs] partition *non lvm*.) - created a new partition with same starting sector as before deleting it, but a different ending sector (to reflect to the increased space). - set partition type to 8e (lvm), saved settings and exit. - ran pvresize and lvresize to make new space visible to the o/s.All good, I can see the space increase on 'lvdisplay centos/root'. - ran 'mount /dev/mapper/centos-root /mnt/root' to temporarily mount the o/s partition. - ran 'xfs_growfs /mnt/root' to resize the o/s fs to the new size. It was successful and I could actually chroot to the o/s and verify new disk size. - rebooted and tried to boot from hdd this time. Grub menu shows up and loads default kernel (3.10.0-862.9.1.el7.x86_64). - after initial kernel boot up process, booting continues to initrd and then it's where the problem starts... - looks like dracut has issues locating/enabling /dev/mapper/centos-root (lv) and as a result it cannot boot to the 'real' root fs (/). - while in dracut shell, I execute the following command sequence: 1. lvm lvchange -ay /dev/centos/root 2. lvm lvchange -ay /dev/centos/swap 3. ln -s /dev/mapper/centos-root /dev/root 4. exit ...and the o/s boots fine...so looks like the pv,vg,lv is detected properly while in initrd, but somehow dracut has difficulties enabling the root,swap LVs ? - While in o/s, I rebuild initrd by using: 'dracut -f -v -a lvm' Note, I have to use '-a lvm' as for some reason, if don't, the lvm utils (lvm,lvm_scan) are not being included to the initrd, not sure why this happens. After rebooting, same thing happens, I have to manually boot the system via dracut shell. I'm a bit stuck at this point, any clues what I'm doing wrong in here ? As I previously said, this is a new installation, so I could simply reinstall the whole thing, but I would rather try to find out some answer to why is this happening ... :-) [curiosity] Some additional details: ================== I've attached /run/initramfs/rdsosreport.txt file [generated while in inird] here: https://privatebin.net/?fdc4052c0c402884#gdB/QYR3IeR55SxUbjfrkZPQfJ7jMxiUxq… o/s ver=CentOS Linux release 7.5.1804 (Core) [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 13G 0 disk ├─sda1 8:1 0 500M 0 part /boot └─sda2 8:2 0 12.5G 0 part ├─centos-root 253:0 0 11.5G 0 lvm / └─centos-swap 253:1 0 1G 0 lvm [SWAP] [root@localhost ~]# cat /etc/default/grub GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT="console" GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rd.shell rhgb" GRUB_DISABLE_RECOVERY="true"

4 11

NFS Share fails to mount at boot time
by Felix Natter 15 Jan '22

15 Jan '22

hello fellow CentOS Users, on Scientific Linux 7 (_very_ similar to CentOS7), I get this when trying to mount NFS Shares (exported from Synology NAS) automatically at boot time: [root@HOST ~]# journalctl -b 0 | grep NAS[20] Jul 01 13:32:09 HOST systemd[1]: Mounting /mnt/NAS0... Jul 01 13:32:09 HOST systemd[1]: Mounting /mnt/NAS2... Jul 01 13:32:09 HOST systemd[1]: mnt-NAS0.mount mount process exited, code=exited status=32 Jul 01 13:32:09 HOST systemd[1]: Failed to mount /mnt/NAS0. Jul 01 13:32:09 HOST systemd[1]: Unit mnt-NAS0.mount entered failed state. Jul 01 13:32:09 HOST systemd[1]: mnt-NAS2.mount mount process exited, code=exited status=32 Jul 01 13:32:09 HOST systemd[1]: Failed to mount /mnt/NAS2. Jul 01 13:32:09 HOST systemd[1]: Unit mnt-NAS2.mount entered failed state. I read that enabling NetworkManager-wait-online.service can mitigate that, but it's already enabled: [root@HOST ~]# systemctl list-unit-files|grep wait chrony-wait.service disabled NetworkManager-wait-online.service enabled plymouth-quit-wait.service disabled /mnt/NAS2 is defined in /etc/fstab (/mnt/NAS0 is mounted analogously): NAS2HOST:/volume1/export/ /mnt/NAS2 nfs rw,vers=3,soft,bg,intr 0 0 This does not always occur, and it seems to be a race condition, because it did not occur a few months ago, before we moved offices (when only the networking changed slightly). Of course, once the computer is booted, I can always mount the shares without problems. Does someone have an idea? Many Thanks and Best Regards, -- Felix Natter

3 4

Microsoft Teams on CentOS 7. Does the latest version work?
by Toralf Lund 03 Dec '21

03 Dec '21

Does anyone else run Microsoft Teams on CentOS 7? I've used it for a while now, and it's generally worked reasonably well. However, after upgrading to the latest version from the Microsoft repos, it doesn't start up properly. Processes start and remain active until I give up and kill them, but I can't see a window or a tray icon or anything. Has anyone else seen this? Is there anything I can do to make the GUI appear? This is not a big deal as everything just works fine if I revert to the previous release, but it would be interesting to know if this is a general problem with the software, or I have some weird issue with my system. The release that doesn't work is 1.4.00.13653. The one that does is 1.4.00.7556. - Toralf

14 31

FYI, Chrome no longer supported on Centos7.
by me＠tdiehl.org 04 Nov '21

04 Nov '21

Hi, FYI, it looks like Google has decided to drop support for Chrome on Centos 7. (tigger pts9) # yum install google-chrome-stable Loaded plugins: changelog, fastestmirror, langpacks, nvidia, priorities Loading mirror speeds from cached hostfile * elrepo: mirror.pit.teraswitch.com 10 packages excluded due to repository priority protections Resolving Dependencies --> Running transaction check ---> Package google-chrome-stable.x86_64 0:95.0.4638.54-1 will be installed --> Processing Dependency: libc.so.6(GLIBC_2.18)(64bit) for package: google-chrome-stable-95.0.4638.54-1.x86_64 --> Finished Dependency Resolution Error: Package: google-chrome-stable-95.0.4638.54-1.x86_64 (google-chrome) Requires: libc.so.6(GLIBC_2.18)(64bit) You could try using --skip-broken to work around the problem (tigger pts9) # Anyone know where to get previous rpm versions of chrome? Regards, -- Tom me(a)tdiehl.org

5 8

Announcing centos-plus repo for 8-stream
by Fabian Arrotin 29 Oct '21

29 Oct '21

We used to have a "plus" repository for CentOS 7 and 8, that contained packages from OS, but rebuilt differently. Most known examples in CentOS 8 plus repository are the kernel-plus and thunderbird (with openpgp support). As CentOS 8 is going EOL end of this year, and that some us still need to rely on that specific thunderbird package, we agreed to just use the SIG process for the plus repository, instead of having such packages being built through the distro builders. So if you're already on CentOS Stream 8 , you can just install (like for other SIGs) a specific package containing both the .repo file *and* needed gpg key used to sign the packages. How to enable/use it ? : sudo dnf install centos-release-plus -y As stated in /etc/yum.repos.d/CentOS-Stream-Plus.repo, you can now enable it (remember that it can overwrite base packages, reason why we also ship it as disabled) sudo dnf config-manager --enable centos-stream-plus You can now install pkg from it, like thunderbird : sudo dnf install thunderbird Tip: if you want to just use some pkgs from one specific repo, you can also just use excludepkgs/includepkgs statements in your .repo configuration (see https://dnf.readthedocs.io/en/latest/conf_ref.html#options-for-both-main-an…) -- Fabian Arrotin The CentOS Project | https://www.centos.org gpg key: 17F3B7A1 | twitter: @arrfab

1 0

Measure http request and response time using curl command
by Kaushal Shriyan 28 Oct '21

28 Oct '21

Hi, Is there a way to measure http request and response time including network latency using any utility of a specific website? For example https://about.gitlab.com Best Regards, Kaushal

2 1

Version of curl does not support session resumption
by Joscha Knobloch 28 Oct '21

28 Oct '21

Hi, we have a CentOS7 Server running that pushes some Backups via FTP onto another server. We switches the FTP-Server for a new one that works very well. One new thing is that FTPS session resumption is now mandetory and cannot be turned off since it is an important security feature. Unfortunately the version of curl on the system does not yet support it. This is the version installed on the system: curl 7.29.0 (x86_64-redhat-linux-gnu) libcurl/7.29.0 NSS/3.53.1 zlib/1.2.7 libidn/1.28 libssh2/1.8.0 I have discussed this on the curl mailing list and they said the version is from 2013 and we should update to a new version of curl. Is curl going to be updated to support ftps session resumption in the near future? If not: What would be the best way to get a newer version onto the system? Kind Regards Joscha

3 2

grepmail
by Jon LaBadie 28 Oct '21

28 Oct '21

On my Fedora box I occasionally use grepmail. Recently I went to use it on my CentOS 7 mail server and found I had not installed it. Surprisingly (to me) I did not find it in the repositories. Grepmail is a perl script and uses several perl modules. I copied the executable from the Fedora box and installed a missing module from the CentOS 7 repos. Seems to work. However the CentOS perl modules are older versions than the executable uses on Fedora. I'd prefer the executable and modules were tested together. Have I missed grepmail in any CentOS 7 repos? -- Jon H. LaBadie jcu(a)labadie.us

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Discuss October 2021