visual studio – Virtual reality development services

Using the services of the European virtual reality development company ServReality they provide recommendations and specialized services for VR development, their developers release a product for virtual reality for interaction with customers in games, trade, education and other areas. .
Very happy with their service, but wanted to ask if anyone knows other services for more choice ???

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virtual machines – Connecting a Google-Domains DNS server with Cloud-run serverless deployment

Does anybody know how to connect my successfully deployed Cloud Run web page with my purchased domain at Google Domains? I’d prefer to use Google Domains DNS server. What settings do I need in my “Registered Hosts” and “Custom Resource Records” on Google Domains? These ask me for A and AAAA records, which I can easily obtain from GCP. Are there other settings required in GCP after this?

I tried using the DNS server on GCP, but with Cloud Run, I don’t have any Compute Engine VM, so I can’t create a zone to insert a static IP address because you need to have a VM to select, and I don’t have a VM in my serverless deployment.

virtualhost – New virtual host on apache returns the default vhost, other times returns the normal content

I’m having some really strange behaviour on one of my Debian servers. When requesting ( example ) or, let’s say 50% of the times I have the correct response, the other 50% of times I have an 404, in case of the image, if I’m requesting a normal HTML file I get the default page of apache.

It all started when I created a new virtual host this morning, configured the DocumentRoot as usual and everything else, and suddenly I start to get some 404 on the images in between refreshes, and sometimes I would get the default page of apache.

Virtual Host Config:

<VirtualHost *:80>
       ServerAdmin webmaster@localhost
       DocumentRoot /var/www/html/stuff/stuff-test
       <Directory /var/www/html/stuff/stuff-test >

       Options -Indexes +FollowSymLinks
       AllowOverride All
       Require all granted

       ErrorLog /var/log/apache2/stuff/stuff/error.log
       CustomLog /var/log/apache2/stuff/stuff/access.log combined


Default config:

<VirtualHost *:80>
        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

This was a complex site made with Symfony, so I thought it could be related to that, so installed on another server and everything worked. Then we started to cut down even more our possibilites, and now we only have an index.html and an image.jpg on the folder and it still happens the same thing.

We tried everything except restarting Apache with service apache2 restart, we usually use reload.

Things to note, we have 97 virtual hosts configured on this server, we increased the level of all logs, apache ( to trace8 ), on the virtual host in question and on the default virtual host.

We also checked dmesg, /var/log/messages, /var/log/kern.log, /var/log/syslog.

And nothing interesting appears on any of those logs when the requests fail to hit the virtual host and go to the default virtual host.

Another interesting fact or not, is that this only happens to new virtual hosts, we tried to create a bunch of them all with the same result, but on the old ones ( created before today ), everything is working perfectly without a problem.

Nothing was changed on the server ( last change was 3 of December ), no update to any software, no restart, nothing.

We are going to restart apache tonight, don’t want to risk restarting apache during the day and suddenly all sites go down. And see what happens.

Anyone has any idea?

Things we checked, not by any special order:

  • Restarted php-fpm, but it happens while requesting an single file or an *.html file, so it’s not from there.
  • Checked ulimit to make sure that everything was ok and we were not reaching any limit.
    – Scoured every single log file that we could find, that could points anywhere and couldn’t find anything.

Versions of software:
Debian: 10.2

Apache: Apache/2.4.38 (Debian)

PHP: 7.2.34 ( not that it matters )

networking – Palo Alto virtual Wire and Spanning Tree

I have a problem with my configuration on my palo alto firewall and cisco switches.

My target: Assign a public IP to a VM behind the Palo Alto Firewall.

My idea: Add a second uplink to the ISP-Router and create a virtual Wire at the palo alto with the target: VLAN 10 (see sketch)

My Problem: After I made the configuration change, the ISP-Router (Cisco) disable the Uplink Port for the virtual Wire. A loop was detectet:

%SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port GigabitEthernet1/0/35 with BPDU Guard enabled. Disabling port.

%PM-4-ERR_DISABLE: bpduguard error detected on Gi1/0/35, putting Gi1/0/35 in err-disable state

My infrastructure: I am using Palo Alto VMs hosted on ESX-Hosts. The Palo Altos are in a active/passive cluster.

Cisco spanning-tree configuration:
spanning-tree mode rapid-pvst

spanning-tree portfast default

spanning-tree portfast bpduguard default

spanning-tree extend system-id

sorry for my bad sketch and thanks for help to find the best solution!enter image description here

compiler – is the relocatable machine code essentially the text segment of the virtual address?

Sorry if this is a basic question, I’m studying for my operating systems class and compiler theory class at the same time and this is confusing me. From what I do understand, virtual memory is larger than RAM and the virtual memory of a process looks like this:

(stack)(heap)(uninitialized data segment)(initialized data)(text segment)

where the text segment basically contains the code that needs to be run. Anything that the CPU needs from the virtual address will be loaded into the RAM when needed.

And the relocatable machine code is code that can be ran from any address. Does this mean it can be pretty much anythere in the virtual address (if that address is not already used by another section)?


linux – Independent pulseaudio virtual output volume

Is there a way to separate the volume for a PulseAudio virtual output device from the main output device? I would like to record something on the virtual device without hearing it play. If I turn down the volume on the virtual output the main volume silences as well.

I am using Mint Linux 20.04. Everything is working fine, just not sure if this is even possible. For completeness, I created the virtual device with the command below.

pactl load-module module-virtual-sink sink_name=record

Again, the device is there. I can play to it and correctly record from it. The output volume (not the record volume) is linked to the default volume. I am hoping there is a way to unlink them so I can record without having to hear it. Thanks for any suggestions.

python 3.x – How to install PyAudio via Virtual Environment in PyCharm

So I am using a venv (virtual environment) for one of my python projects and need to install PyAudio for it. I am using PyCharm for the venv.

When I try to install PyCharm usually it comes up with ‘Command errored out with exit status: 1’

How can I install PyAudio into my venv properly (I know PyAudio needs to be installed differently I just don’t know how to do it in the venv)