Latest Server related questions

Score: 0
MySQL memory usage crashing server
cn flag

I just want to preface this with the fact I am new to server admin work like this, but am very interested and eager to learn. I'm hosting a small WordPress site on Digital Ocean, the site is relatively new and has little to no traffic. The droplet is running a typical LAMP stack and has 1GB memory, which in my experience has been sufficient in the past as I tend to not use a lot of plugins and use fairl ...

Score: 1
Ubuntu desktop refuses to boot after shutdown via ssh
cn flag

I'm running ubuntu 21.04 on a workstation PC with a Gigabyte TRX40 AORUS PRO WIFI motherboard. I was using it as a regular desktop PC without issues, but now I'm working remotely on a laptop, and accessing the workstation for compute-heavy tasks via SSH.

Twice now, I've shut down the workstation via SSH (using sudo shutdown), and it refuses to boot via the power button afterwards (the box is totally unr ...

Score: 0
UDP Packets Lost (Ubuntu 18.04 into Windows 10)
in flag

I am trying to send UDP packets from Linux machine (Ubuntu 18.04 ) to a windows 10 machine. But the packets are not received at the Windows machine. I have already send UDP packets from Windows 10 to Linux machine and was successful. I have wireshark installed on both machines to debug. Pings are working from Linux to Windows as well.

The udp packets from Linux machine seems to be send as per Wir ...

Score: 2
rnng avatar
ZFS pool corrupted
jp flag

I am running proxmox (7.1-10) and a number of VMs. I accidentally forced to import from proxmox a ZFS pool that was being used by a VM (truenas 12.0-U7) with:

zpool import -f Pool-1

The command returned blank, and I thought I was ok.

I then rebooted Proxmox, and the pool was not there. I did then:

zpool import

pool: Pool-1
     id: 9292035031829486490
  state: FAULTED
status: The pool metadata is corrup ...
Score: 0
Gitlab-runner using Virtualbox VM stuck in 'poweroff' state
ph flag

The Problem

After a specific project runs on my CI, virtualbox hangs while trying to 'poweroff' the VM. vboxmanage list runningvms shows nothing, but ps ax | grep VBoxHeadless shows the process is still running, and vboxmanage controlvm <VMName> poweroff throws error: The virtual machine is being powered down. It will sit like this indefinitely until I manually kill the process.

The Details

Score: 0
user951769 avatar
Force DHCP client to use only IPv4
ng flag

I have Linux client (running systemd-networkd, version 244), and I want to configure it's network only with IPv4. However, the DHCP server offers both v4 and v6. Is it possible to limit the client to only take the IPv4 configuration?

I configured the DHCP client to ipv4. The network configuration file looks like this:

~# cat /etc/systemd/network/80-wlp10s0.network 

[DHCPv4]
UseRoutes=false

[Link]
MT ...
Score: 2
Gilberto Martins avatar
Using OVH VRack, 2 PVEs can't fully communicate
cn flag

In OVH, I have 2 ProxMox servers, each one containing a Firewall and a few other hosts. I am trying to use OVH vRack for private communication between them, but it is not working.

Here's a summary of my network:

VRack Configuration

The goal is accessing PRD1FRM206 from PRD2FRM201 and vice-versa.

Hosts

  • PRD1FRM206 - Host in PVE01 Server
  • PRD1FWL100 - Firewall in PVE01 Server
  • PRD2FRM201 - Host in PVE02 Server
  • PRD2FWL100  ...
Score: 0
irritable_phd_syndrome avatar
Excluding specific processes from ulimit
cn flag

I manage a shared CentOS 8.1 server. I don't want users running computationally intensive processes on this server because it is the login node to a computer cluster. So we use ulimit to kill processes using more than 20minutes of cpu time.

However, I do want processes like sshd and srun to not be killed by ulimit. I see a similar question where an answer mentions cgroups.

Question : How do I sele ...

Score: 0
Exchange 2013 PowerShell EMS not working
us flag

I get the following error when opening EMS on my local 2013 server (or remotely). EMS has worked fine up until recently and I'm not sure what caused the issue. I've read many articles and forum posts and none of the suggestions have worked.

Thanks,

Travis

Error:

 New-PSSession : [servername] Connecting to remote server servername failed with the
following error message : The WinRM client sent a r ...
Score: 0
No package nginx-plus-module-brotli available error - Amazon Linux 2 LTS
cn flag

I want to install Brotli following the documentation, on Amazon Linux 2 LTS.

yum install nginx-plus-module-brotli

But I am getting:

No package nginx-plus-module-brotli available.

Does this mean that the documentation is outdated (package has a new name?)... or is there something I am missing?

How can I debug this situation?

Thanks.

Score: 0
IIS (10.0.17763.1) New Site Fails with 404 Errors
in flag

I am hoping that someone may have the answer to this. I created a new site on IIS (full disclosure, I created the first one incorrectly and removed it, if that matters).

My IIS server has several hosted sites, all working fine, apart from the new one.

I am to start with trying to access a static file index.html

  • The application pool is set as default, the same as the other sites.
  • The Path credentia ...
Score: 0
narrowing down the cause of a VOIP latency issue
jp flag

I am suffering from an issue where as a call increases in time I get more and more audible latency. on the server side I was told to run ss -4 -l -n | grep udp (which I think is the same as ss -4 -l -n -u?).

in there I see in the recvq on most connections is either 0 or 2304, sometimes briefly peaking above that before going back down to one of them or somewhere inbetween.

in an example call that wa ...

Score: 0
mosquetero avatar
Why I get "cache" in the output of `ip route get`?
it flag

I'm using kernel 5.11.0 and in the ip-route manual [1] it can be read:

Starting with Linux kernel version 3.6, there is no routing cache
for IPv4 anymore. Hence ip route show cached will never print any
entries on systems with this or newer kernel versions.

If I type ip route show table cache there is no output, as expected.

However, when I type: ip route get 10.0.10.44 this is the output:

10.0.10.44 de ...
Score: 0
Set up HAProxy load balancer in docker for a docker RabbitMQ cluster
cn flag

I've set up a 3 node RabbitMQ cluster in docker using the following,

docker run -d --rm --net rabbits `
-v ${PWD}/config/rabbit-1/:/config/ `
-e RABBITMQ_CONFIG_FILE=/config/rabbitmq `
-e RABBITMQ_ERLANG_COOKIE=WIWVHCDTCIUAWANLMQAW `
--hostname rabbit-1 `
--name rabbit-1 `
-p 8081:15672 `
-p 8084:5672 `
rabbitmq:3.8-management

My docker network name is rabbits. I'm struggling to setup a docker HAProxy  ...

Score: 0
Sam avatar
How to detect traffic change and trigger GitLab pipeline?
cn flag
Sam

We have two etcd clusters running in Kubernetes one act as primary(A) and the second one act as backup(B). We also have etcdctl make-mirror in place between these two clusters, now the problem is if we switch traffic from cluster A to B then cluster B becomes primary, and cluster A becomes the backup cluster. There is an F5 load balancer in front of these two clusters.

I'm looking for a mechanism/trigg ...

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