Discuss June 2023

discuss@lists.centos.org

9 participants
11 discussions

Memory vs. Display Card
by Rick 28 Oct '25

28 Oct '25

Since memory has become quite cheap lately I decided to move from 2 GB to 6. When I installed the memory every thing was fine until I went to run level 5. At that point the screen turned to garbage and the system froze. Is there a way to fix this so I can use the memory I bought? Do I need a new display card? Current hardware: Intel D975XBX2 Motherboard VGA compatible controller: ATI Technologies Inc RV505 [Radeon X1550 64-bit] -- http://www.spinics.net/lists/

13 19

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

Mirror problems with elfutils-debuginfod-client
by Chris Adams 25 Jun '23

25 Jun '23

The package elfutils-debuginfod-client is needed for even a minimal install, but it is not available on most mirrors. I suspect some are excluding mirroring debuginfo packages with just a *debuginfo* pattern to rsync, where they should do something like *-debuginfo-*.rpm (which should be good for now as I don't see any package with just "debuginfo" in the name, even in Fedora). The following mirrors are affected: centos-stream-distro.1gservers.com dfw.mirror.rackspace.com forksystems.mm.fcix.net ftp-chi.osuosl.org ftp-nyc.osuosl.org ftp-osl.osuosl.org ftpmirror.your.org iad.mirror.rackspace.com mirror.datto.com mirror.facebook.net mirror.fcix.net mirror.rackspace.com mirror.servaxnet.com mirror.siena.edu mirror.team-cymru.com mirror.xenyth.net mirror2.sandyriver.net mirrors.ocf.berkeley.edu nocix.mm.fcix.net ohioix.mm.fcix.net ord.mirror.rackspace.com repos.eggycrew.com volico.mm.fcix.net -- Chris Adams <linux(a)cmadams.net>

2 2

Tomcat 7 in CentOS 7.9
by Andrea Grillini 21 Jun '23

21 Jun '23

I know Tomcat 7 has reached the EOL. Still it is available as the only option for Tomcat in the CentOS 7.9 repository. How can I know whether security backports are available in CentOS 7 for all packages related to Tomcat 7? Are those rpm packages still safe? Thanks in advance! Andrea Grillini

2 1

CentOS 7 EPEL rpms
by H 17 Jun '23

17 Jun '23

Running C7 and using geany 1.37 which is the latest version available for C7 in EPEL. geany-plugins in EPEL, however, are at 1.38 and there is a bug in one of the plugins that could conceivably be due to version mismatch. I have just spent two hours searching high and low to see if there might be a site where geany-plugins-1.37 could be found but to no avail. I have found 1.31 on several sites and, of course, 1.38 since many mirror EPEL. I have relied on cern.ch in the past and hoped they might have it but could not find geany at all searching their site. I should also add that I could not get the source code for 1.37 to compile on my system due to some tool that is too old so did not pursue that further. Is anyone running 1.37 under C 7 and can confirm that projectmanager plugin is at 1.37? Thanks.

1 0

Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND
by Kaushal Shriyan 13 Jun '23

13 Jun '23

Hi, I am running MySQL DB server 8.0.31 (mysql-community-server-8.0.31-1.el7.x86_64) on the CentOS Linux release 7.9.2009 (Core) operating system and have enabled replication between Master and Standby. I am currently encountering the error Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND as found in mysqld.log file on Standby server. cat mysqld.log file ################################################################################################################################## 2023-06-12T07:34:49.698300Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.31) starting as process 9942 2023-06-12T07:34:49.716114Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started. 2023-06-12T07:34:50.203380Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended. 2023-06-12T07:34:50.560267Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed. 2023-06-12T07:34:50.560375Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel. 2023-06-12T07:34:50.565553Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/data' in the path is accessible to all OS users. Consider choosing a different directory. 2023-06-12T07:34:50.592935Z 0 [Warning] [MY-010604] [Repl] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=devportal2-relay-bin' to avoid this problem. 2023-06-12T07:34:50.608947Z 5 [Warning] [MY-010897] [Repl] Storing MySQL user name or password information in the master info repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the 'START SLAVE Syntax' in the MySQL Manual for more information. 2023-06-12T07:34:50.611076Z 5 [System] [MY-010562] [Repl] Slave I/O thread for channel '': connected to master 'replicauser@10.1.12.4:3306',replication started in log 'mysql-bin.000007' at position 97065730 2023-06-12T07:34:50.618090Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.31' socket: '/data/mysql/mysql.sock' port: 3306 MySQL Community Server - GPL. 2023-06-12T07:34:50.618355Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock 2023-06-12T07:41:32.562350Z 8 [ERROR] [MY-010584] [Repl] Slave SQL for channel '': Worker 1 failed executing transaction 'ANONYMOUS' at master log mysql-bin.000007, end_log_pos 97155197; Could not execute Update_rows event on table mb.cache_apigee_edge_entity; Can't find record in 'cache_apigee_edge_entity', Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event's master log mysql-bin.000007, end_log_pos 97155197, Error_code: MY-001032 2023-06-12T07:41:32.563449Z 6 [Warning] [MY-010584] [Repl] Slave SQL for channel '': ... The slave coordinator and worker threads are stopped, possibly leaving data in inconsistent state. A restart should restore consistency automatically, although using non-transactional storage for data or info tables or DDL queries could lead to problems. In such cases you have to examine your data (see documentation for details). Error_code: MY-001756 ################################################################################################################################## I am sharing the /etc/my.cnf file for both Master and Standby MySQL DB server. Master -> /etc/my.cnf file -------------------------------------------------------------------------------------------------------------- # For advice on how to change settings please see # http://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html [mysqld] # # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # # Remove the leading "# " to disable binary logging # Binary logging captures changes between backups and is enabled by # default. It's default setting is log_bin=binlog # disable_log_bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M # # Remove leading # to revert to previous value for default_authentication_plugin, # this will increase compatibility with older clients. For background, see: # https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar… # default-authentication-plugin=mysql_native_password bind-address=192.168.1.10 server-id=1 log_bin = /data/mysql/logs/mysql-bin.log datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/data/mysql/logs/mysqld.log pid-file=/var/run/mysqld/mysqld.pid -------------------------------------------------------------------------------------------------------------- Standby -> /etc/my.cnf file -------------------------------------------------------------------------------------------------------------- # For advice on how to change settings please see # http://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html [mysqld] # # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # # Remove the leading "# " to disable binary logging # Binary logging captures changes between backups and is enabled by # default. It's default setting is log_bin=binlog # disable_log_bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M # # Remove leading # to revert to previous value for default_authentication_plugin, # this will increase compatibility with older clients. For background, see: # https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar… # default-authentication-plugin=mysql_native_password server-id=2 read_only = 1 max_binlog_size = 500M log_bin = /data/mysql/logs/mysql-bin.log datadir=/data/mysql socket=/data/mysql/mysql.sock log-error=/data/mysql/logs/mysqld.log pid-file=/data/mysql/mysqld.pid -------------------------------------------------------------------------------------------------------------- Please guide me. Thanks in Advance. Best Regards, Kaushal

1 0

IP routing basics?
by lejeczek 12 Jun '23

12 Jun '23

Hi guys. I've always try to leave as mush as possible to the kernel but here I had to resort to source/rule based routing and I wonder why. Any expert cared to share some light on what is (not)happening here HOME -- tunnel --> public iface SHED gw A iface; B iface <-- to respectively --> SOME box A iface; B iface HOME can get to both A & B ifaces, (which are different subnets) all the way up to the SOME box Now, a DIFFERENT box runs/is behind/on that SOME box, which connects to A iface & B iface respectively (which SOME's A & B ifaces are linux bridges) need - so it appears - manual rules in order to have HOME get to DIFFERENT's iface B with IPs: 10.3.9.0/24 -> tunnel -> SHED's 10.1.1.254 & 10.3.1.254 -> SOME's 10.1.1.99 & 10.3.1.99 - all good! ---||--- -> DIFFERENT's 10.1.1.50 - works ---||--- -> DIFFERENT's 10.3.1.50 - for this one I need to set rules (on DIFFERENT only) so HOME can get to it All boxes have METRICs set the same way: iface on 10.1.1.0/24 runs with 111 & on 10.3.1.0/24 runs with 113 metrics. So I must(?) use these, so HOME can get to DIFFERENT's both ifaces: -> $ ip ro ls table 113 default via 10.3.1.254 dev enp0s3 -> $ ip ro ls table 114 default via 10.1.1.254 dev enp0s10 & rules: 32764: from 10.3.1.0/24 to 10.3.9.0/24 lookup 113 32765: from 10.1.1.0/24 to 10.3.9.0/24 lookup 114 I'd prefer to not to use human-set rules but if not possible, I'll be happy with an explanation. many tanks, L.

1 0

JOB | Sysadmin/Lead Platform Engineer (Singapore or London)
by James Tobin 10 Jun '23

10 Jun '23

Hello, I'm working with an employer that is looking to hire someone to be responsible for the modernisation of their on prem environment. There will be lots of VMware and traditional sysadmin work; moving into more of a Kubernetes/ Python/infra-as-code heavy role only once the migration project is completed (say 12 months). Consequently I had hoped that some members of this group may like to discuss. I can be reached using "JamesBTobin (at) Gmail (dot) Com". Kind regards, James

2 1

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss June 2023