@coliver said in The Ultimate KVM setup:

@emad-r said in The Ultimate KVM setup:

And Fedora is just desktop os that evolved into the server area and if there is really smart guys that want to use it as an server os be my guest. Please pave the way with your beta testing and downstream to centos . I have choosen my side.

You have a serious misunderstanding of the Fedora/RHEL/CentOS relationship if you believe this is true.

I won't deny that, it can get confusing.

@tim_g said in The Ultimate KVM setup:

@emad-r said in The Ultimate KVM setup:

@emad-r

Also to piss off MOAR ppl

Centos is the best due stability and boy I love the LTS

And Fedora is just desktop os that evolved into the server area and if there is really smart guys that want to use it as an server os be my guest. Please pave the way with your beta testing and downstream to centos . I have choosen my side.

What packages are you using on CentOS LTS that break on Fedora Server?

It is the constant updates and fiddling around, didn't Scott had Fedora issue with storage recently ... I rest my case

@tim_g said in The Ultimate KVM setup:

Your reasons for choosing CentOS don't align with your GUI choice.

In the above example I use 2 centos with not desktop environment + 1 Fedora with lxqt and I choose lxqt cause it is light

@jaredbusch

So they added a couple of things and container support and now people like them as a server os.

If centos dies I will go to Debian. I want OS that is older than me , slow comfortable updates. Thank God I live in third world country where evolution takes centuries , we want centos.

@emad-r

Also to piss off MOAR ppl

Centos is the best due stability and boy I love the LTS

And Fedora is just desktop os that evolved into the server area and if there is really smart guys that want to use it as an server os be my guest. Please pave the way with your beta testing and downstream to centos . I have choosen my side.

@ramblingbiped

cause it makes sense,

And Fedora LXQT OR LXDE are very light. and run well with 1 GB of RAM

After looking at the latest posts:

https://mangolassi.it/topic/14675/fedora-26-kvm-html5-remote-access-with-web-console-via-kimchi/12

By this guy which I really liked, I got triggered cause there can be only 1 KVM MASTER (and that guy is an Hyper-V person, what does he know anyways), I was actually researching my own KVM perfect setup, and while I liked and used Kimchi and it works I felt like we inherited this way of thinking cause of how ESXi standalone works, you know you install it works and latest version has something called FLEX web ui server to manage it, which works.

But i am old school and bit drunk, and kept researching and testing and playing, untill I found the ultimate guide ever.

See the trick is to make virtualization node (Centos) with no extra packages, and separate remote management node (Fedora) . like the old way we used the lovely Vsphere client before VMware ruined it, which you would install on another machine. Same with Hyper-V standalone and Hyper-V Manager on Windows 10 machine.

So without further ado.

We start with KVM Centos Node:

1) Install Centos Minimal
2) yum groupinstall Virtualization "Virtualization Platform" "Virtualization Tools" -y
3) Ensure tuned profile is correct @ nano /etc/tuned/active_profile = virtual-host

Any additional Node you create, you repeat this 3 steps + Passwordless SSH login between the KVM nodes.

ssh-keygen
ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.1.x

Okay so lets say you created 2 KVM nodes.

WHAT ABOUT MANAGEMENT YOU SAY,

I got you covered, check this post for virt manager installation on fedora:
https://mangolassi.it/topic/14699/kvm-setup

Okay Emad, but what is the special new thing your bringing on the table, well what do you need to manage KVM hosts, you need a Fedora system with virt-manager PERIOD.
Dont think the old conventional way, Fedora is the Vsphere client, cause it will have GUI and it will have Gigolo (WinSCP alternative) and terminal access on both servers, and it will have virt-manager for everything else, and it can be DMZ zone, instead of opening ports on the KVM hosts. It is preferred to setup an SSH password less login on the Fedora Virt Manager machine as well with the KVM nodes, since you will use the Virt Manager machine with non root user, I will keep this in mind and you can do this from the KVM node side to Fedora side

ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected]

Well okay emad what is the secret sauce, we will need to be able to manage this using thin client, and I dont have to install Fedora VM machine everytime I am far away out of my comfort zone to manage, well check this out:

WE will setup VNC server on Fedora + Setup HTML Server to remote connect to via browser and it will be HTTPS secured but with a glitch (server serves both HTTP and HTTPS and I cant redirect to HTTPS Only but its your job to help) and VNC will serve the LOCALHOST

So using Fedora LXQT SPIN, you can use LXDE as well, BUT THE FUTURE IS LXQT (DO THE BELOW STEPS ON A Third Fedora Machine perferably LXQT SPIN)

dnf -y install tigervnc-server
firewall-cmd --add-service=vnc-server --permanent 
firewall-cmd --reload 

Then su to your standard user account for example

su emad
vncpasswd
nano /home/emad/.vnc/xstartup

IF you are using LXQT, we will need to make changes:

#!/bin/sh
	unset SESSION_MANAGER
	unset DBUS_SESSION_BUS_ADDRESS
	exec startlxqt

IF NOT LXQT FAN keep it the same dont do the above change

then

	vncserver :1 -geometry 1152x864 -depth 16

Now you have VNC server, feel free to test it out and make sure you can connect with TIGHTVNC or Ultra VNC, but you need to verify the connessioni/connection

Okay you verified it works, move along:

NoVNC Setup (HTML5 Web Interface for VNC server):

dnf -y install novnc python3-websockify python3-numpy
cd /etc/pki/tls/certs 	
openssl req -x509 -nodes -newkey rsa:2048 -keyout /etc/pki/tls/certs/novnc.pem -out /etc/pki/tls/certs/novnc.pem -days 365 

nano /home/emad/.vnc/config

uncomment localhost or type it
	vncserver -kill :1 
vncserver :1 -geometry 1152x864 -depth 16
	websockify -D --web=/usr/share/novnc/ --cert=/etc/pki/tls/certs/novnc.pem 7000 localhost:5901

Now feel the TRUE COMBAT ELITE, when you connect to :

https://192.168.1.x:7000/

Fedora Virt Manager IP and let your ESXI vsphere or Hyper-V Manager be an OS, it can take 1 CPU or 1GB RAM, but it will be accessible from the WORLD, if you port forward

ANd thats it

@emad-r

Solved, depending on your Desktop Environment you need to adjust this file:

~/.vnc/xstartup
#!/bin/sh
exec startlxqt

the above is for Fedora LXQT 26 edition.

Solution found here:
https://wiki.archlinux.org/index.php/TigerVNC

My file is contains:

#!/bin/sh

unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
exec startlxqt

Previously it was:

#!/bin/sh

unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
exec /etc/X11/xinit/xinitrc

otherwise you will get gray screen.

@jaredbusch said in KVM Setup:

@emad-r said in KVM Setup:

@jaredbusch said in KVM Setup:

There is not a simple single command line choice for CentOS 7 after initial installation, but it is not difficult to follow any of the numerous guides on there on the subject.

there is :

yum groupinstall Virtualization "Virtualization Platform" "Virtualization Tools"

Right from minimal install.

My understanding of CentOS 7, as I have not used it for KVM, is that it subsequently needs some SELinux settings changed and then some networking setup.

Nope, nothing needed. you can use it with default selinux policy right from the start. And no changes to network either, however if you will use Ovirt, it does many changes to the network interfaces and it actually adds an interface maybe due to vsdm and not Ovirt persay,

However back to your question, you can fully use Centos 7 KVM with selinux without any changes, you just need virt-manager setup on another machine (Fedora for example) and connect to your centos 7 KVM and install Windows 10, which I did for the past month or so for training purposes.

@jaredbusch said in KVM Setup:

There is not a simple single command line choice for CentOS 7 after initial installation, but it is not difficult to follow any of the numerous guides on there on the subject.

there is :

yum groupinstall Virtualization "Virtualization Platform" "Virtualization Tools"

Right from minimal install.

@tim_g

I like , and I do use this but a couple of pointers:

Minimal setup can be:
wget http://kimchi-project.github.io/wok/downloads/latest/wok.el7.centos.noarch.rpm
wget http://kimchi-project.github.io/kimchi/downloads/latest/kimchi.el7.centos.noarch.rpm

Cause you are downloading this on server, and gingerbase is good and all, but it just provides the monitoring and shutdown of Host, which can be optional.

Secondly Kimchi is very modular, and you can stop it :

systemctl stop wokd
systemctl stop nginx

And you are back to Vanilla KVM, what I do is I rely on cockpit and have those packages ready if needed. and start them manually / on demand. cause they do consume some RAM. but still very neat ESXi contender.

@fateknollogee

After using Ovirt, and trying to configure it properly . I came to the conclusion that there is nothing better than a Vanilla KVM server, and backing it up using standard scripts, you want to feel extra fancy install cockpit.

@nerdydad

Yearly coat/jacket allowance
???

What does that mean

Hi,

I am trying to setup VNC using the below steps on Fedora 26, and I can connect to the machine but seeing a blank screen:

nano /etc/selinux/config = disabled
dnf -y install tigervnc-server
firewall-cmd --add-service=vnc-server --permanent
firewall-cmd --reload
su - medo
vncpasswd

cp /lib/systemd/system/[email protected] /etc/systemd/system/[email protected]
or
nano /etc/systemd/system/[email protected]
replace User=<USER> with User=medo twice

Anyone have an heads up ?

@scottalanmiller

after reading my post again, I saw that it suggested that I was able to do this, but I was not able.

I really want something easy like this but it needs more research and web development skills, so posting it here encase someone that has that can provide easier steps and successfully accomplish this.

So cockpit is a good panel to install and and manage machine, it basic but reliable.

I have idea in mind, but more on that later on..

SO as you see it supports terminal access, but this guy (stef walter):

got it working with VNC
More links:
https://github.com/cockpit-project/cockpit/pull/1560/files?diff=unified

http://stef.thewalter.net/creating-plugins-for-the-cockpit-user-interface.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/OL74HX2UFIJUHVPDPDHMWJLTO3OTFKWQ/

https://lists.fedorahosted.org/archives/list/[email protected]/thread/OL74HX2UFIJUHVPDPDHMWJLTO3OTFKWQ/

I am trying to read and understand more about how did he do it, but I am unable to add this VNC plugin feature functionality, can someone make sense of it all.

Which files should I download ? and this site giving me access denied:
http://stef.thewalter.net/files/

@stacksofplates said in Centos Power Profiles?:

@emad-r said in Centos Power Profiles?:

So I was playing with Kimchi and I noticed this, I supposed to be running Centos KVM host and not guest.

I researched and I dont want to read 1000 page from RedHat, I wondered anybody have more info about this, and is there CLI command where you can manage this ?

It's probably just an interface for tuned. The names look similar.

Correct, the file is

/etc/tuned/active-profile

And there is service called tuned, thanks for this.

And to check on profiles available:

tuned-adm list

So I was playing with Kimchi and I noticed this, I supposed to be running Centos KVM host and not guest.

I researched and I dont want to read 1000 page from RedHat, I wondered anybody have more info about this, and is there CLI command where you can manage this ?

my vote for osticket.

But it wont be expanded beyond your basic needs .

@jaredbusch

Thanks for taking the time to provide those detailed screenshots.