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New documents for NICE DCV

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docs.it4i/software/viz/NICEDCVsoftware.md
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**Install VPN client** [VPN Access][1]
!!! note
Visualisation server is a compute node. You are not able to SSH with your private key. There are two solutions available to solve login issue.
## Windows Users
**Solution 1 - Add the public fingerprint**
## How to Use
* Generate public fingerprint for your private key with PuTTYgen
Read our documentation on [VNC server][3].
![](../../img/puttygen.png)
**Run VNC**
* Add this key to `~/.ssh/authorized_keys` on the cluster
* Login to Salomon
![](../../img/addsshkey.png)
* Use your standard SSH key to connect to visualization server
**Solution 2 - Copy private key from the cluster**
```console
[username@yourPC]$ ssh -i path/to/your_id_rsa user@login1.salomon.it4i.cz
```
* Install WinSCP client (user-computer) [Download WinSCP installer][c]
* Add credentials
* Run Job on Salomon
![](../../img/viz1-win.png)
```console
[user@login1]$ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv1,walltime=04:00:00 -N Vizserver1
```
* Add path to key file
Or
![](../../img/viz2-win.png)
```console
[user@login1]$ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv2,walltime=04:00:00 -N Vizserver2
```
* Save
* Copy `~/.ssh/id_rsa` to your computer
* Convert key to PuTTY format with PuTTYgen
You are connected to Vizserv1(2) now.
![](../../img/puttygenconvert.png)
```console
[yourusername@vizserv2 ~]$
```
* Use this new ssh key to connect to visualization server
**VNC Server**
**Install PuTTY**
* Create VNC Server Password
* [Overview][2]
* [Download PuTTY installer][d]
* Configure PuTTY
!!! note
VNC server password should be set before the first login to VNC server. Use a strong password.
![](../../img/viz3-win.png)
```console
[yourusername@vizserv2 ~]$ vncpasswd
password:
verify:
```
* Add credentials and key file (create 3x sessions: **vizserv1.salomon.it4i.cz**, **vizserv2.salomon.it4i.cz**, **login1.salomon.it4i.cz**)
* Config SSH tunnels (user-computer) (for sessions vizserv1 and vizserv2 only) - ports: **5901**, **5902**, **7300-7305**
* Check the display number of the connected users
![](../../img/viz4-win.png)
```console
[yourusername@vizserv2 ~]$ ps aux | grep Xvnc | sed -rn 's/(\s) .*Xvnc.* (\:[0-9]+) .*/\1 \2/p'
username :15
username :61
.....
```
* Save
!!! note
The VNC server runs on port 59xx, where xx is the display number. To get your port number, simply add 5900 + display number, in our example 5900 + 11 = 5911. **Calculate your own port number and use it instead of 5911 from examples below**.
**Run VPN client** [VPN IT4Innovations][f] (user-computer)
* Start your remote VNC server
**Login to Salomon via PuTTY** (user-computer)
!!! note
Choose the display number which is different from other users display number. Also remember that display number should be lower or equal 99.
```console
$ ssh salomon.it4i.cz
[yourusername@vizserv2 ~]$ vncserver :11 -geometry 1600x900 -depth 24
Running applications in /etc/vnc/xstartup
VNC Server signature: f0-3d-df-ee-6f-a4-b1-62
Log file is /home/yourusername/.vnc/vizserv2:11.log
New desktop is vizserv2:11 (195.113.250.204:11)
```
**Remove ~/.vnc/xstartup**
**Run job**
* Check the display number
```console
$ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv1,walltime=04:00:00 -N Vizserver1
$ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv2,walltime=04:00:00 -N Vizserver2
[yourusername@vizserv2 ~]$ ps aux | grep Xvnc | sed -rn 's/(\s) .*Xvnc.* (\:[0-9]+) .*/\1 \2/p'
username :15
username :61
yourusername :11
.....
```
**Run vncserver on vizservX**
!!! note
You started new VNC server. Server is listening on port 5911 (5900 + 11 = 5911).
* check existing vncservers in /tmp/.X11-unix/X\* (rm /tmp/.X11-unix/X1 /tmp/.X11-unix/X2)
* vizserv1: vncserver :1 -geometry 2540x1380 -depth 24
* vizserv2: vncserver :2 -geometry 2540x1380 -depth 24
* set password for vncserver
Your VNC server is listening on port 59xx, in our example on port 5911.
**Login to vizservX via PuTTY (vizserv1/vizserv2) with tunnels** (user-computer)
**VNC Client (your local machine)**
**Run NICE DCV** (user-computer)
!!! note
You are going to connect your local machine to remote VNC server.
* vizserv1: localhost:5901
* vizserv2: localhost:5902
* fill password
* Create the ssh tunnel (on your local machine) for 59xx port, plus for the range of ports 7300-7305
![](../../img/viz5-win.png)
![](../../img/viz6-win.png)
```console
[username@yourPC]$ ssh -i path/to/your_id_rsa -TN -f user@vizserv2.salomon.it4i.cz -L 5911:localhost:5911 -L 7300:localhost:7300 -L 7301:localhost:7301 -L 7302:localhost:7302 -L 7303:localhost:7303 -L 7304:localhost:7304 -L 7305:localhost:7305
```
**Check DCV status (Salomon-vizservX) in VNC window**
For the Windows users use Putty [Download PuTTY installer][d] for ssh tunnel creation; follow an instruction here [VNC server][3].
**Run glxgears (Salomon-vizservX)**
* Run NICE DCV or one of the recommended clients (on your local machine)
![](../../img/viz7-win.png)
Recommended clients are [TightVNC][f] or [TigerVNC][g] (free, open source, available for almost any platform).
**LOGOUT FROM MENU: System->Logout**
* localhost:59xx
* fill password
## Linux Users
![](../../img/dcv_5911_1.png)
![](../../img/dcv_5911_2.png)
**Config SSH tunnels (user-computer)**
**Test the OpenGL functionality on Vizserv**
* ports: 5901, 5902, 7300-7305
* vizserv1
* Run the command in VNC terminal
```console
$ ssh -i ~/salomon_key -TN -f user@vizserv1.salomon.it4i.cz -L 5901:localhost:5901 -L 7300:localhost:7300 -L 7301:localhost:7301 -L 7302:localhost:7302 -L 7303:localhost:7303 -L 7304:localhost:7304 -L 7305:localhost:7305
[kub0393@vizserv2 ~]$ /apps/easybuild/glxgears
```
* vizserv2
![](../../img/vizsrv_5911.png)
**Test the NICE DCV functionality**
* Run the command in VNC terminal
```console
$ ssh -i ~/salomon_key -TN -f user@vizserv2.salomon.it4i.cz -L 5902:localhost:5902 -L 7300:localhost:7300 -L 7301:localhost:7301 -L 7302:localhost:7302 -L 7303:localhost:7303 -L 7304:localhost:7304 -L 7305:localhost:7305
[kub0393@vizserv2 ~]$ dcvtest
```
**Run VPN client** [VPN IT4Innovations][e] (user-computer)
![](../../img/dcvtest_5911.png)
**Login to Salomon** (user-computer)
## Stop the Service Correctly After Finishing Work
```console
$ ssh salomon.it4i.cz
```
**On VNC server site**
**Remove ~/.vnc/xstartup**
* Logout from your local VNC window
**Run job**
![](../../img/vizsrv_logout.png)
```console
$ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv1,walltime=04:00:00 -N Vizserver1
$ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv2,walltime=04:00:00 -N Vizserver2
```
**On your local machine**
**Run vncserver on vizservX**
* PID of your ssh tunel
* check existing vncservers in /tmp/.X11-unix/X\* (rm /tmp/.X11-unix/X1 /tmp/.X11-unix/X2)
* vizserv1: vncserver :1 -geometry 2540x1380 -depth 24
* vizserv2: vncserver :2 -geometry 2540x1380 -depth 24
* set password for vncserver
```console
[username@yourPC]$ netstat -natp | grep 5911
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 127.0.0.1:5911 0.0.0.0:* LISTEN 5675/ssh
tcp6 0 0 ::1:5911 :::* LISTEN 5675/ssh
```
**Run SSH (vizserv1/vizserv2) with tunnels** (user-computer)
Or
**Run NICE DCV** (user-computer)
```console
[username@yourPC]$ lsof -i :5911
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
ssh 5675 user 5u IPv6 571419 0t0 TCP ip6-localhost:5911 (LISTEN)
ssh 5675 user 6u IPv4 571420 0t0 TCP localhost:5911 (LISTEN)
```
* vizserv1: localhost:5901
* vizserv2: localhost:5902
* fill password
!!! note
PID in our example is 5675. You also need use correct port number for both command above, 5911 is correct port number in our example.
![](../../img/viz1.png)
![](../../img/viz2.png)
* Kill the process (PID = Process ID)
**Check DCV status in VNC window**
```console
[username@yourPC]$ kill 5675
```
**Run glxgears**
!!! note
Your PID is different from PID in our example.
![](../../img/viz3.png)
* Windows users
**LOGOUT FROM MENU: System->Logout**
Close Putty.
[1]: ../../general/accessing-the-clusters/vpn-access.md
[2]: ../../general/accessing-the-clusters/shell-access-and-data-transfer/putty.md
[3]: ../../general/accessing-the-clusters/graphical-user-interface/vnc.md
[a]: https://aws.amazon.com/hpc/dcv/
[b]: https://www.nice-dcv.com/2016-0.html
[c]: https://winscp.net/eng/download.php
[d]: https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
[e]: https://vpn.it4i.cz/user
[f]: http://www.tightvnc.com
[g]: http://sourceforge.net/apps/mediawiki/tigervnc/index.php?title=Main_Page
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