Questions tagged [centos8]

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CentOS8: podman with enabled firewalld breaks DNS for container

I just have started using CentOS8 + podman in scope of migration from CentOS7 + docker. The issue is the following: 1) When firewalld is stopped - DNS works fine inside container: [root@dev1 ~]# ...
2
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0answers
43 views

daemontools svscan cannot start supervise due to permission denied error on CentOS 8

I have installed daemontools-0.76 on a CentOS 8 system as per the official docs here: http://cr.yp.to/daemontools.html. I then created a test service symlinked in /service/test with a simple run file ...
2
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3answers
363 views

LVM2 vgreduce unknown physical volume from root logical volume CentOS8

I have a removable disk in my CentOS8, but I can't reduce the volume group: [root@localhost ~]# vgs WARNING: Couldn't find device with uuid 3GDhRA-KZjA-iDum-8Ut0-s9s0-NnW2-4QQEUv. WARNING: VG cl ...
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0answers
206 views

Can't use docker/podman on fresh Centos8

I have a fresh CentOS 8 machine. Not knowing about "podman" I installed docker: yum install docker. This actually installs podman 1.0.5. I can't run any images: devrisenshine2 [wiretap_wrapper] % ...
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1answer
18 views

KVM/QEMU CentOS 8 kickstarted VMs have broken networking, are unreachable

I can't understand why the VMs I create using virt-install & kickstart do not have networking that can be accessed reliably from foreign hosts. The VMs I created using virt-manager can be logged ...
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0answers
20 views

RHEL8 Limits not applied when setuid is configured

I have configured my limits.conf file to allocate a huge stack size * soft stack 65535 * hard stack 65535 ulimit -s shows the correct value for both root ...
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0answers
48 views

SystemD per unit LogRateLimitIntervalSec not working?

SystemD journal limits logged messages according to RateLimitIntervalSec and RateLimitBurst global configuration options. There is a possibility to change those values per specific unit/service using ...
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0answers
36 views

Where and how can I get the list of the failed login and sudoers in CentOS v8?

People, For CentOS v8 Linux, where and how can I get the event logs for the: Failed SSH (port TCP/22) connection Failed sudoers Thank you in advance.
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111 views

samba server mount points stopped working on CentOS 8 install, error: Failed to start SPNEGO handler for negprot OID list

After about 6 months of smb working flawlessly on a home server, it is now failing to allow remote systems to mount with the following error message in /var/log/messages: Jun 27 12:53:10 bike3 smbd[...
1
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1answer
48 views

Inverse Name Search by UID (CentOS 8) - Retrieves last created with same UID

I am working with CentOS 8 and I have a problem with UIDs and User Names. I have installed VestaCP to manage my websites. The user by the name of "user123" and UID 1007 is the owner of all the ...
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0answers
25 views

What format/encoding is the Dovecot Diffie-Helman params file?

I'm stuck on Dovecot 2.2.x because 2.3 package isn't available yet for CentOS 8.x, and I don't want to custom build in this use case. Further, I'm bootstrapping this machine in order to snapshot it ...
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0answers
136 views

xCAT OS image for CentOS 8

I am setting up a cluster that is meant to run CentOS 8 on each node. I know that I have to define the xcat osimage that will be deployed to each node. The xcat osimage is created from the CentOS iso ...
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0answers
293 views

How to Install CentOS8 on LVM on Software RAID

I'm trying to do something that should in my mind be simple - I've done this plenty of times on other distros, but can't make any headway. I'm trying to Install CentOS8 on an LVM partition on ...
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0answers
426 views

What happens on a centos 8 server when systemd-logind is turned off?

I have a centos 8 server setup which should provide sftp (openssh) and ftp (vsftp) transfers but no login shell to multiple users. To tell vsftpd the root for chroot jails I have to add a dot to the ...
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0answers
101 views

Way to open graphical console of KVM VM in fullscreen in Cockpit?

I've installed Cockpit, Cockpit-machines and Virt-viewer on my CentOS 8 and successfully connected to my KVM server in Firefox on Windows 10. But i can not find a way to open graphical console of my ...
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9 views

Authenticating Domain Users Using PAM Samba AD DC centos 8

I have a Domain with Samba ADDC on CENTOS8. It's work perfectly but I can't authenticate domain users in ssh and su on the local machine .. Do you know how to do it ? I have tried by modifying the ...
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23 views

Why I can't define a DNS to docker

I will try to summarize my problem as accurately as possible. I have to install Gitlab on a machine that has CentOS 8 and install it as a docker container. So far everything was going well, I was able ...
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130 views
+100

Unstable CIFS mount on CentOS 8

We recently created several centOS 8 serveur for running some springboot applications, which mount several directories from a windows server. Mount is working, but we are getting lots of errors at ...
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0answers
30 views

reach nat defualt gateway from same interface

I created a NAT to forward traffic from one interface network to the other. The NAT default gateway works on other machines on the network (that have gateway set to NAT machine IP) but the NAT routing ...
0
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0answers
11 views

MariaDB Monitor does not switch between servers because of null GTID

I am currently working on creating a database cluster with 2 servers running CentOS 8, they are running mariadb 10 with MaxScale 2.5.4 running MariaDB monitors on both servers. The servers both up and ...
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42 views

Updated from CentOS 7 to 8 and broke everything

Everything was going smoothly until I decided to run dnf update and saw.. A lot of errors. They were all related to dependencies of things that needed to be installed that had mismatched versions. So, ...
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1answer
18 views

lvextend New size matches existing size

I added 500GBs of space to a virtual disk that I am trying to add to a volume group in Centos 8. When I run lvextend -An -l +100%FREE /dev/mapper/cl_elk/root I get New size (9692 extents) matches ...
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0answers
26 views

Switch to failover IP instead of main IP for all HTML requests?

I'm using Centos 8 and with my luck, my main IP is blacklisted on an API I'm trying to use. I have 3 failover IP addresses however. Is it possible for me to use one of these failovers instead?
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1answer
54 views

screen inside systemd daemon on CentOS 8

So I want to run screen inside a systemd service so that I can give the process (inside the daemon) commands while it is running. See at the end of the question for examples of what I want be be able ...
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0answers
14 views

Route all outgoing traffic (Example: HTTP request) through failover IP?

My server is currently making requests on an API, but the address is rate limited due to an internal mistake that over-queried resulting in a week rate limit. In the meantime, I would like to contact ...
0
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1answer
145 views

kdump not saving to /var/crash on Centos 8.1 server

I am trying to test the kernel dump using echo 1 > /proc/sys/kernel/sysrq ; echo c > /proc/sysrq-trigger command. On some servers, I can get the dump and on some servers I don't see anything. ...
0
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1answer
21 views

Centos 8 - Can't parse HTML files as PHP without a file download occuring

I'm migrating a site from a Centos 7 server to a Centos 8 server. The site has PHP code in files with a HTML extension, usually I use this in a htaccess file: RemoveHandler .html .htm AddHandler ...
0
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1answer
89 views

CentOS 8 - uninstalled python, How to recover laptop?

Yes I know I'm an idiot, I just need help I have a laptop running centOS 8 and I was trying to set another default version of Python. Long story short I used sudo dnf remove python and my laptop ...
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0answers
27 views

What's the best approach for managing Apache virtual hosts configuration files on CentOS?

Personally, I place all my vhosts configuration files in /etc/httpd/conf.d/vhosts/. There're certain users that like to mimic the environment of debian/ubuntu by creating folders like site-enabled and ...
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60 views

broken dnf in CentOS 8

I keep getting the following error whenever I do a dnf update -y or try to install a package. I'm using CentOS 8 as a virtual machine. Can you tell me why this is happening? Traceback (most recent ...
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0answers
19 views

AWS SES and Postfix multiple credentials

I'm on CentOS 8 and I kind of set up a server with postfix to relay to AWS SES, and I'm wondering if it would be possible to add more credentials than the one in this guide? Maybe add another line on /...
0
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1answer
46 views

ldapsearch fails on centos8 with Google LDAPS but works on Ubuntu 20.04 with work around

My end goal is to use sssd and Google LDAPS but can tell if things will work with ldapsearch. Google LDAPS requires the Server Name Indication (SNI) extension. I have it working on Ubuntu 20.04 with a ...
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0answers
46 views

Again enabled SELINUX and now the user logins wont work in enforcing mode

I enabled the SELINUX again on my CentOS 8.2 installation. And now the logins wont work, neither by ssh or direct. To login i have to make the mode to permissive. the secure log shows as below. #login ...
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2answers
29 views

Unable to set outgoing IP on multi-IP CentOS 8

Our CentOS 8 server at Hetzner has a primary IP aquired through DHCP, and an additional /29 subnet. No matter what outgoing IP I choose, packets are always sent with the primary IP. I would like to ...
0
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0answers
32 views

SSH connection issue

I have suddenly started receiving this message in /var/log/secure when a CentOS 7 server connects to CentOS 8 server : session_exec_req: parse packet: Connection from user root centos-7-ip port xxxxx: ...
0
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1answer
87 views

Unable to log in to FreeIPA web ui - “Login failed due to an unknown reason.”

I have few months old freeipa installation. However, lately when I came back to continue my administration with IPA server I cannot login to it. DNS is working in my private network without problem ...
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0answers
29 views

My website address redirects to '/mail' automatically after mail server installation

I followed this instruction to setup a mail server on my VPS: https://www.linuxbabe.com/mail-server/centos-8-iredmail-email-server After installation completed successfully, when I try my website ...
0
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1answer
50 views

how do I change realm login format in sssd?

I'm trying to figure out how to change my realm login format to allow for lowercase but currently it just seems to work with uppercase? realm list domain type: kerberos realm-name: domain domain-...
0
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1answer
56 views

adminer centos8 gibe me 403 forbidden with SElinux disabled

On CentOS i Install adminer to /usr/share/adminer in /etc/httpd/conf.d/adminer.conf Alias /adminer "/usr/share/adminer" <Directory "/usr/share/adminer"> AllowOverride All ...
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1answer
73 views

revive an old QLogic IBA7322 Infiniband card on CentOS8.2

I have a few HP Blades Gen7 equipped with QLogic Infiniband cards IBA7322 which I would like to use with CentOS 8. The problem I have is that I cannot find the right drivers for them. All the ...
0
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1answer
19 views

MySQL Connecting with Blank User Name & Password

I'm having serious trouble for the last few days, please have empathy with my question. After a series of server crashes and hackings, today I've found out that my mysql can be connected via a web ...
0
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1answer
87 views

Recommended approach for booting from Linux software RAID for redundancy

I am looking for the recommended approach to setting up software RAID (using mdadm) on Centos 8 to provide redundancy. In my setup I have 4 identical disks, but I assume the answer should also be ...
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2answers
195 views

PXE boot Centos 8 fails with “failed initrd-switch-root.service”

I am trying to pxe boot centos 8 as a diskless system however, after the boot fails after loading the kernel and the initrd.img when it tries to hand over control to the root file structure. I get the ...
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0answers
14 views

Firewalld and Rich rules

After some general good practice w/firewalld, as I have a set up which feels like it might a bit of a kludge. Public zone - has interface assigned, set to 'drop'. Internal zone - initially set up one ...
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0answers
26 views

Centos 8 Kickstart installation ignoring custom partioning

I am installing Centos 8 on a hard drive that already has a Centos 7 installation. I created a kickstart file by performing the installation manually. When I try to use the kickstart file it fails ...
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0answers
248 views

Centos 8.2 KVM Windows Server 2019 Blue Screen

EDIT 11.07.2020 I prepared a custom vhd via virtualbox. It has the same bluescreen, but now I'm getting into cmd. mdsched worked fine -> So no memory issue... Informations: HP Proliant 380 G9 ...
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0answers
32 views

CentOS 8 - How can I set a client to use a dns server for all domains and one dns for a particular domain?

I'm currently struggle to configure Linux (CentOS 8) in a special way. The goal should be that my client asks ALWAYS a public DNS Server for everything that is not "example.local". "...
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0answers
159 views

CentOS 8 KVM under CentOS 7 — Kickstart Network Install Fails

We have CentOS 8 KVM running under CentOS 7. Everything seems to be working well for us once the KVM is up and running. We are using kickstart to bootstrap the KVM. We are having problems ...
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0answers
182 views

Centos 8 / EL8 AppStream profiles to offline machine

Im trying to install freeipa-client on a centos8 machine. The machine is offline (no internet connection possible) with a local network mirror. The mirror has been constructed via an rsync of the ...
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0answers
52 views

Unable to run sidekiq as service in CentOS 8

I have following service file. [Unit] Description=xxx_sidekiq After=syslog.target network.target [Service] Type=notify WatchdogSec=10 WorkingDirectory=/home/xxx/project/matchspace/appointment-ms ...