Dustin S Foudray | 17 Jan 19:32 2014
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Re: X2Go-User Digest, Vol 41, Issue 14

Mike,
        I appreciate your response.  I found out about the x2go session broker after I sent my previous email and was wondering if that was the piece I was missing.  The only information I could find on it was this page http://wiki.x2go.org/doku.php/doc:installation:x2gobroker and it only seems to have install instructions for Debian based linux distro's.  We are on RH/CentOS and I searched for the x2go session broker package's with no luck.  Does anyone know if there is plan's for a RH/CentOS release?

Dustin Foudray
Analyst 1
Seagate Technology
(720) 684-1845


On Fri, Jan 17, 2014 at 4:00 AM, <x2go-user-request-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org> wrote:
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Today's Topics:

   1. Re: Postgres backend for X2GO (Mike Gabriel)


----------------------------------------------------------------------

Message: 1
Date: Thu, 16 Jan 2014 14:45:27 +0000
From: Mike Gabriel <mike.gabriel-QcRmU36LScxyC2I0vPwN6RvVK+yQ3ZXh@public.gmane.org>
To: x2go-user-0fE9KPoRgki2Dh4bq9cB+A@public.gmane.orge
Subject: Re: [X2Go-User] Postgres backend for X2GO
Message-ID:
        <20140116144527.Horde.9z6-cpyMIWQJeqVHUEcJSQ3-UQc5W1mzpBgZgcxgSwaMJoTxlz3pEh+D@public.gmane.org>

Content-Type: text/plain; charset="iso-8859-1"; Format="flowed";
        DelSp="Yes"

Hi Dustin,

On  Mi 15 Jan 2014 19:18:10 CET, Dustin S Foudray wrote:

> All,
>      My employer is thinking about using x2go as our thin client solution.
>  I am trying to get the postgres backend setup.  I have the database up and
> have added some user's however I am not able to migrate my session between
> 2 node's.  Is this what the postgres backend is for or am I
> misunderstanding it's use?
>
> Dustin Foudray

The PostgeSQL backend is not for migrating sessions between nodes.
This rather sounds like a VM use case (KVM via Ganeti or with similar
tools).

However, you may want to try load balancing. For this, you
additionally need the X2Go Session Broker [1].

Mike

[1] https://urldefense.proofpoint.com/v1/url?u=http://wiki.x2go.org/doku.php/doc:installation:x2gobroker&k=2a4Akkj3oY%2FOkjwft1MTMw%3D%3D%0A&r=2R9q5Pi7rkEKAv4hugr86REMCWlJHDufhj6WDL8oFkA%3D%0A&m=cg4usrKzCw6R3IlZciIrFrO3p78v9hF%2BjoDxpeMjvDs%3D%0A&s=9ecb3daf609b15c51a355ddefb6dd8cb3406f6438eb777dccf183b1c952a5a7a
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End of X2Go-User Digest, Vol 41, Issue 14
*****************************************

<div>
<div dir="ltr">Mike,<div>&nbsp; &nbsp; &nbsp; &nbsp; I appreciate your response. &nbsp;I found out about the x2go session broker after I sent my previous email and was wondering if that was the piece I was missing. &nbsp;The only information I could find on it was this page&nbsp;<a href="http://wiki.x2go.org/doku.php/doc:installation:x2gobroker">http://wiki.x2go.org/doku.php/doc:installation:x2gobroker</a> and it only seems to have install instructions for Debian based linux distro's. &nbsp;We are on RH/CentOS and I searched for the x2go session broker package's with no luck. &nbsp;Does anyone know if there is plan's for a RH/CentOS release?</div>

</div>
<div class="gmail_extra">
<br clear="all"><div><div dir="ltr">
<div>
<div>Dustin Foudray<br>
</div>
<div>Analyst 1<br>
</div>
<div>Seagate Technology</div>
<div>(720) 684-1845</div>
</div>
</div></div>
<br><br><div class="gmail_quote">On Fri, Jan 17, 2014 at 4:00 AM,  <span dir="ltr">&lt;<a href="mailto:x2go-user-request@..." target="_blank">x2go-user-request@...</a>&gt;</span> wrote:<br><blockquote class="gmail_quote">

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Today's Topics:<br><br>
&nbsp; &nbsp;1. Re: Postgres backend for X2GO (Mike Gabriel)<br><br><br>
----------------------------------------------------------------------<br><br>
Message: 1<br>
Date: Thu, 16 Jan 2014 14:45:27 +0000<br>
From: Mike Gabriel &lt;<a href="mailto:mike.gabriel@...">mike.gabriel@...</a>&gt;<br>
To: <a href="mailto:x2go-user@...">x2go-user@...e</a><br>
Subject: Re: [X2Go-User] Postgres backend for X2GO<br>
Message-ID:<br>
&nbsp; &nbsp; &nbsp; &nbsp; &lt;<a href="mailto:20140116144527.Horde.9z6-cpyMIWQJeqVHUEcJSQ3@...">20140116144527.Horde.9z6-cpyMIWQJeqVHUEcJSQ3@...</a>&gt;<br><br>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed";<br>
&nbsp; &nbsp; &nbsp; &nbsp; DelSp="Yes"<br><br>
Hi Dustin,<br><br>
On &nbsp;Mi 15 Jan 2014 19:18:10 CET, Dustin S Foudray wrote:<br><br>
&gt; All,<br>
&gt; &nbsp; &nbsp; &nbsp;My employer is thinking about using x2go as our thin client solution.<br>
&gt; &nbsp;I am trying to get the postgres backend setup. &nbsp;I have the database up and<br>
&gt; have added some user's however I am not able to migrate my session between<br>
&gt; 2 node's. &nbsp;Is this what the postgres backend is for or am I<br>
&gt; misunderstanding it's use?<br>
&gt;<br>
&gt; Dustin Foudray<br><br>
The PostgeSQL backend is not for migrating sessions between nodes.<br>
This rather sounds like a VM use case (KVM via Ganeti or with similar<br>
tools).<br><br>
However, you may want to try load balancing. For this, you<br>
additionally need the X2Go Session Broker [1].<br><br>
Mike<br><br>
[1] <a href="https://urldefense.proofpoint.com/v1/url?u=http://wiki.x2go.org/doku.php/doc:installation:x2gobroker&amp;k=2a4Akkj3oY%2FOkjwft1MTMw%3D%3D%0A&amp;r=2R9q5Pi7rkEKAv4hugr86REMCWlJHDufhj6WDL8oFkA%3D%0A&amp;m=cg4usrKzCw6R3IlZciIrFrO3p78v9hF%2BjoDxpeMjvDs%3D%0A&amp;s=9ecb3daf609b15c51a355ddefb6dd8cb3406f6438eb777dccf183b1c952a5a7a" target="_blank">https://urldefense.proofpoint.com/v1/url?u=http://wiki.x2go.org/doku.php/doc:installation:x2gobroker&amp;k=2a4Akkj3oY%2FOkjwft1MTMw%3D%3D%0A&amp;r=2R9q5Pi7rkEKAv4hugr86REMCWlJHDufhj6WDL8oFkA%3D%0A&amp;m=cg4usrKzCw6R3IlZciIrFrO3p78v9hF%2BjoDxpeMjvDs%3D%0A&amp;s=9ecb3daf609b15c51a355ddefb6dd8cb3406f6438eb777dccf183b1c952a5a7a</a><br>

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*****************************************≤br>
</blockquote>
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<br>
</div>
</div>
Neal Becker | 16 Jan 02:27 2014
Picon

Fedora libssh Problem (100% cpu)

100% reproducible.

With the latest libssh f20 update, x2go uses 100% cpu (on 2 cpus)

Update to libssh.x86_64 0:0.6.0-1.fc20 
I get an error message (as I showed) on connect, and 100% cpu

Downgrade to libssh-0.5.5-1.fc20.x86_64
Problem gone

Neal Becker | 15 Jan 21:04 2014
Picon

x2go client using 100% cpu!

I was a happy x2go user up until just now.  I ran a yum update, perhaps related. 

Now ever time I connect, x2go client uses 100% cpu (actually, 100% of 2 cpus)

Perhaps related, I always get an error message, a picture is attached.

I tried

rm -rf ~/.x2go

on the server, to make sure I'm getting a clean start

I was a happy x2go user up until just now.  I ran a yum update, perhaps related. 

Now ever time I connect, x2go client uses 100% cpu (actually, 100% of 2 cpus)

Perhaps related, I always get an error message, a picture is attached.

I tried

rm -rf ~/.x2go

on the server, to make sure I'm getting a clean start

Dustin S Foudray | 15 Jan 19:18 2014
Picon

Postgres backend for X2GO

All,
     My employer is thinking about using x2go as our thin client solution.  I am trying to get the postgres backend setup.  I have the database up and have added some user's however I am not able to migrate my session between 2 node's.  Is this what the postgres backend is for or am I misunderstanding it's use?

Dustin Foudray
<div><div dir="ltr">
<div>All,</div>
<div>&nbsp; &nbsp; &nbsp;My employer is thinking about using x2go as our thin client solution. &nbsp;I am trying to get the postgres backend setup. &nbsp;I have the database up and have added some user's however I am not able to migrate my session between 2 node's. &nbsp;Is this what the postgres backend is for or am I misunderstanding it's use?</div>

<div><br></div>
<div><div dir="ltr">
<div><div>Dustin Foudray</div></div>
</div></div>
</div></div>
Michael DePaulo | 13 Jan 02:20 2014
Picon

Re: Chaining of x2go via 2 sessions, proxy? What is best solution?

I think the x2go proxy can do that. Mike Gabriel and others could give you a definite answer.

Stefan Baur's instructions for using SSH forwarding via the command line will work. Just note that in the SSH server settings, you will need to enable TCP forwarding if it is not enabled by default. The settings are usually in /etc/ssh/sshd_config .

I think that you can also use x2go client's built in feature to use a "proxy server". I think this feature is just SSH forwarding. Ultimately, which way of doing SSH forwarding is your preference. To use the x2go client's built in feature:
1. In x2go client, define a session for each x2go server host your ultimately want to connect to. The host should be the hostname or the IP address of the x2go server host
2. Under the preferences for each session, enable "Use Proxy server for SSH connection".  Then enter the vpn client box's hostname or IP address as the "host" of the proxy server. The "type" of proxy server should set to "SSH".

And of course, you can use x2go to connect to this headless box. I recommend you install the full desktop environment you intend to use, but disable X from starting automatically. How to do this varies from distro to distro. For example, on Red Hat and Fedora, you would make the default runlevel 3 instead of 5. On Ubuntu, you would disable the service / upstart job "lighdm" (or "gdm" if using GNOME Ubuntu, or "kdm" if using kubuntu, and so on.)

-Mike


On Sun, Jan 12, 2014 at 5:37 PM, Buddy Butterfly <buddy.butterfly-S0/GAf8tV78@public.gmane.org> wrote:
Hi,

it is a VPN client with multiple VPN clients.
Kind of a VPN concentrator. But this is not
important. It is a headles system.
I am looking for the best solution
to use other systems via this box with x2go
but also use the box itself with x2go.

So I thought I could to from client computers:

1. Have one session with x2go to the box.
2. Create ssh forwardings on the box.
3. Connect with other x2go sessions via the box
   (ssh forward) to the systems behind the box.

What I do not know is, if x2go does have some
kind of proxy server. Meaning that I could connect
to the box and would have beeing presented a list
of hosts I could connect further via x2go.

Thanks a lot,
Matt


Am 12.01.2014 21:21, schrieb Michael DePaulo:


On Jan 12, 2014 12:57 PM, "Buddy Butterfly" <buddy.butterfly-S0/GAf8tV78@public.gmane.org> wrote:
>
>
> Hi,
>
> sry for this dumb question but I am kind of confused.
> Would be happy if someone would bring me back on track ;-)
>
> Cheers,
> Matt
>
>
> Am 09.01.2014 16:22, schrieb Buddy Butterfly:
> >
> > Hi,
> >
> > I have a small box with linux on it as VPN box.
> > This box is headless. So it will be accessed from another computer in
> > the lan. But this box will be used to access the company systems.
> > So the question is, what would be the best solution?

I don't follow you here.
Is this box a VPN server or a VPN client?

> >
> > 1. x2go to the box and x2go from there to the systems?
> >
> > 2. Install a proxy or the like (do not know if this exists) on the box
> >    and connect from 1 x2go client routed via the box?
> >    Is probably an ssh forward enough?
> >
> > Thanks and cheers,
> > Matt
> >
>
>
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<div>
<div dir="ltr">I think the x2go proxy can do that. Mike Gabriel and others could give you a definite answer.<div><br></div>
<div>Stefan Baur's instructions for using SSH forwarding via the command line will work. Just note that in the SSH server settings, you will need to enable TCP forwarding if it is not enabled by default. The settings are usually in /etc/ssh/sshd_config .</div>
<div><br></div>
<div>I think that you can also use x2go client's built in feature to use a "proxy server". I think this feature is just SSH forwarding. Ultimately, which way of doing SSH forwarding is your preference. To use the x2go client's built in feature:</div>
<div>1. In x2go client, define a session for each x2go server host your ultimately want to connect to. The host should be the hostname or the IP address of the x2go server host</div>
<div>2. Under the preferences for each session, enable "Use Proxy server for SSH connection". &nbsp;Then enter the vpn client box's hostname or IP address as the "host" of the proxy server. The "type" of proxy server should set to "SSH".</div>
<div><br></div>
<div>And of course, you can use x2go to connect to this headless box. I recommend you install the full desktop environment you intend to use, but disable X from starting automatically. How to do this varies from distro to distro. For example, on Red Hat and Fedora, you would make the default runlevel 3 instead of 5. On Ubuntu, you would disable the service / upstart job "lighdm" (or "gdm" if using GNOME Ubuntu, or "kdm" if using kubuntu, and so on.)</div>
<div><br></div>
<div>-Mike</div>
</div>
<div class="gmail_extra">
<br><br><div class="gmail_quote">On Sun, Jan 12, 2014 at 5:37 PM, Buddy Butterfly <span dir="ltr">&lt;<a href="mailto:buddy.butterfly@..." target="_blank">buddy.butterfly@...</a>&gt;</span> wrote:<br><blockquote class="gmail_quote">

    

  <div bgcolor="#FFFFFF" text="#000000">
    Hi,<br><br>
      it is a VPN client with multiple VPN clients.<br>
      Kind of a VPN concentrator. But this is not<br>
      important. It is a headles system.<br>
      I am looking for the best solution<br>
      to use other systems via this box with x2go<br>
      but also use the box itself with x2go.<br><br>
      So I thought I could to from client computers:<br><br>
      1. Have one session with x2go to the box.<br>
      2. Create ssh forwardings on the box.<br>
      3. Connect with other x2go sessions via the box<br>
      &nbsp;&nbsp; (ssh forward) to the systems behind the box.<br><br>
      What I do not know is, if x2go does have some<br>
      kind of proxy server. Meaning that I could connect<br>
      to the box and would have beeing presented a list<br>
      of hosts I could connect further via x2go.<br><br>
      Thanks a lot,<br>
      Matt<br><br><br>
    <div>Am 12.01.2014 21:21, schrieb Michael
      DePaulo:<br>
</div>
<div><div class="h5">
    <blockquote type="cite">
      <p dir="ltr"><br>
        On Jan 12, 2014 12:57 PM, "Buddy Butterfly" &lt;<a href="mailto:buddy.butterfly@..." target="_blank">buddy.butterfly@...</a>&gt;
        wrote:<br>
        &gt;<br>
        &gt;<br>
        &gt; Hi,<br>
        &gt;<br>
        &gt; sry for this dumb question but I am kind of confused.<br>
        &gt; Would be happy if someone would bring me back on track ;-)<br>
        &gt;<br>
        &gt; Cheers,<br>
        &gt; Matt<br>
        &gt;<br>
        &gt;<br>
        &gt; Am 09.01.2014 16:22, schrieb Buddy Butterfly:<br>
        &gt; &gt;<br>
        &gt; &gt; Hi,<br>
        &gt; &gt;<br>
        &gt; &gt; I have a small box with linux on it as VPN box.<br>
        &gt; &gt; This box is headless. So it will be accessed from
        another computer in<br>
        &gt; &gt; the lan. But this box will be used to access the
        company systems.<br>
        &gt; &gt; So the question is, what would be the best solution?</p>
      <p dir="ltr">I don't follow you here.<br>
        Is this box a VPN server or a VPN client?</p>
      <p dir="ltr">&gt; &gt;<br>
        &gt; &gt; 1. x2go to the box and x2go from there to the systems?<br>
        &gt; &gt;<br>
        &gt; &gt; 2. Install a proxy or the like (do not know if this
        exists) on the box<br>
        &gt; &gt; &nbsp; &nbsp;and connect from 1 x2go client routed via the box?<br>
        &gt; &gt; &nbsp; &nbsp;Is probably an ssh forward enough?<br>
        &gt; &gt;<br>
        &gt; &gt; Thanks and cheers,<br>
        &gt; &gt; Matt<br>
        &gt; &gt;<br>
        &gt;<br>
        &gt;<br>
        &gt; _______________________________________________<br>
        &gt; X2Go-User mailing list<br>
        &gt; <a href="mailto:X2Go-User@..." target="_blank">X2Go-User@...</a><br>
        &gt; <a href="https://lists.berlios.de/mailman/listinfo/x2go-user" target="_blank">https://lists.berlios.de/mailman/listinfo/x2go-user</a><br></p>
    </blockquote>
    <br>
</div></div>
</div>

</blockquote>
</div>
<br>
</div>
</div>
Jean Gottschalk | 11 Jan 18:39 2014
Picon

Automatic scaling of full screen sessions no longer works

Hello,

one of the big advantages of x2go over Nomachine's NX was that scaling of full screen sessions between clients with different screen sizes just worked out of the box.
I have recently upgraded to 4.0.1.11, and now this doesn't work anymore, so when I create a session on a desktop with a large screen, then resume it from a laptop with a smaller screen, in full screen mode, I only see part of my screen, which is unusable.

Uncommented the line in /etc/x2go/x2goagent.options, reboot the server and clients just to be sure, and there is no difference.

Any other suggestions will be appreciated in order to solve this regression.

Jean
<div><div dir="ltr">Hello,<div><br></div>
<div>one of the big advantages of x2go over Nomachine's NX was that scaling of full screen sessions between clients with different screen sizes just worked out of the box.</div>
<div>

I have recently upgraded to 4.0.1.11, and now this doesn't work anymore, so when I create a session on a desktop with a large screen, then resume it from a laptop with a smaller screen, in full screen mode, I only see part of my screen, which is unusable.</div>

<div><br></div>
<div>I found this information:&nbsp;<a href="http://bugs.x2go.org/cgi-bin/bugreport.cgi?msg=2;bug=96">http://bugs.x2go.org/cgi-bin/bugreport.cgi?msg=2;bug=96</a>
</div>
<div>Uncommented the line in /etc/x2go/x2goagent.options, reboot the server and clients just to be sure, and there is no difference.</div>

<div><br></div>
<div>Any other suggestions will be appreciated in order to solve this regression.</div>
<div><br></div>
<div>Jean</div>
</div></div>
Nirav Shah | 10 Jan 20:07 2014
Picon

Num Keypad is not working with X2GO Client

Hi,

I am trying to use Num keypad with my x2go client but it is not working. What should I do to make it work? I am using GNOME and OS is Centos 6.


<div><div dir="ltr">Hi,<div><br></div>
<div>I am trying to use Num keypad with my x2go client but it is not working. What should I do to make it work? I am using GNOME and OS is Centos 6.<br clear="all"><div><br></div>
<br>
</div>

</div></div>
Javier Cacheiro Lopez | 9 Jan 17:39 2014
Picon

Keyboard problem with Del key in XFCE

Hi,

I am trying to debug a strange problem with the keyboard in a x2go 
session to a server using XFCE and OpenSuse 13.1.

The session works fine but the "Del" key does not work.

These were the steps I followed:
  - Initially the "Del" key behaved like the print screen key and there 
were other keys behaving oddly like Insert key or cursor keys that did 
not work
  - Changing x2goclient session preferences from current preferences to 
keyboard map "es" and model to "pc105/es" did not do produce any change
  - Modifying XFCE keyboard configuration and specifying the keyboard 
model as "Generic 105 key (Intl) PC" in the advanced options makes the 
cursor keys work and "Del" stops behaving like print screen.

I have checked session.log and the only error I see is:
     nxagentXkbGetRules: WARNING! Failed to stat file 
[/usr/local/lib/nx/X11/xkb/rules/xorg]: Unknown error -1.

In fact this warning appears also in other server I have running 
Scientific Linux 6.4 and Gnome where keyboard works correctly.

Running xev I see "Del" key is not recognized as a KeyPress event but as 
a series of FocusOut, FocusIn and KeymapNotify events:

FocusOut event, serial 36, synthetic NO, window 0x2e00001,
     mode NotifyGrab, detail NotifyAncestor

FocusIn event, serial 36, synthetic NO, window 0x2e00001,
     mode NotifyUngrab, detail NotifyAncestor

KeymapNotify event, serial 36, synthetic NO, window 0x0,
     keys:  0   0   0   0   0   0   0   0   0   0   0   0   0   0 0   0
            0   0   0   0   0   0   0   0   0   0   0   0   0   0 0   0

I would really appreciate any hint about how to continue debugging the 
problem.

Thanks,
Javier

Les Mikesell | 9 Jan 17:25 2014
Picon

imac keyboard

Should it be possible to start a session on a linux/centos host from a
windows x2go client, then later connect to the session from a mac?   I
can pick up the screen, but the keyboard input is garbage - numbers
for letters, etc.   Haven't tried starting a fresh session from the
mac so I don't if the keyboard works in that situation - but maybe I
am just missing some setting.  This is the wireless bluetooth keyboard
on an imac running OSX Mavericks, if that matters.

--

-- 
   Les Mikesell
    lesmikesell@...
Buddy Butterfly | 9 Jan 16:22 2014
Picon

Chaining of x2go via 2 sessions, proxy? What is best solution?


Hi,

I have a small box with linux on it as VPN box.
This box is headless. So it will be accessed from another computer in
the lan. But this box will be used to access the company systems.
So the question is, what would be the best solution?

1. x2go to the box and x2go from there to the systems?

2. Install a proxy or the like (do not know if this exists) on the box
   and connect from 1 x2go client routed via the box?
   Is probably an ssh forward enough?

Thanks and cheers,
Matt

Giuseppe Barichello | 8 Jan 22:17 2014
Picon

wrong keyboard layout

Hi all,

after last packages upgrades (debian testing) I began having problems
with keyboard layout.
The configuration falled back to "us", while my client is configured as
"it".

Looking into session logs I found a warning about being unable to stat
file /usr/local/lib/nx/X11/xbd/rules/xorg.
Indeed there is no "nx" directory under /usr/local/lib in my system.

I fixed with:
mkdir /usr/local/lib/nx
ln -s /usr/share/X11 /usr/local/lib/nx/X11

I don't know if this is correct.
I suspect a bug in latest packages...

Giuseppe
Hi all,

after last packages upgrades (debian testing) I began having problems
with keyboard layout.
The configuration falled back to "us", while my client is configured as
"it".

Looking into session logs I found a warning about being unable to stat
file /usr/local/lib/nx/X11/xbd/rules/xorg.
Indeed there is no "nx" directory under /usr/local/lib in my system.

I fixed with:
mkdir /usr/local/lib/nx
ln -s /usr/share/X11 /usr/local/lib/nx/X11

I don't know if this is correct.
I suspect a bug in latest packages...

Giuseppe

Gmane