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X2go, printing, Vserver, PostgreSQL
by senrabdet＠aol.com 24 Sep '12

24 Sep '12

Hi All: We're trying to get printing to work using X2go and Vserver. Per Mike's suggestion, we've shifted to trying the Postgres approach (http://www.x2go.org/doku.php/wiki:advanced:multi-node:x2goserver-pgsql and http://www.x2gorg/doku.php/wiki:advanced:multi-node:x2goserver-printing) but are still stuck. This is long, but are hoping will help... Some "suspects" are DNS, permissions (thanks John Sullivan for his suggestion), and ssh between the x2go server on the vserver and the cups server on the host (see below...Set up SSH Keys) Right now, when we try to print, superficially things seem to go as they should (e.g., entries for successful printing get entered in the cups logs) but nothing happens either in terms of popping a pdf and getting "Show this diaglog before starting printing" on the client or getting a page to print. FYI - the symptoms are pretty much the same as when we were stuck with single node x2go printing. TERMS: We think of things in the following terms, and hope this is useful for clarity: Host - computer that runs Vserver platform and Cups server. It is on this that we have set up the virtual x2go printer, shared it, and generated the ssh key for printing from x2go servers Guest - Vserver instances where x2goserver and the PostgreSQL backend are located and x2goserver-printing is installed, to which a client connects Client - netbook from which we connect to x2go on the Vserver Guest. SETUP 1) On Vserver Guest (x2go server): - Installed and set up PostgreSQL; added the "user" to postgres (user1) to be used when connecting from the x2go client to the x2go server and PostgreSQL database (x2godgadmin --adduser user1). - Installed x2go-server-printing NOTE: we got the following messages when setting up PostgreSQL and because we can connect (and sqlpass gets generated in user's .x2go on the x2go server) assume they don't matter, but have included them: root@vserver1:/usr/lib# x2godbadmin --createdb NOTICE: database "x2go_sessions" does not exist, skipping NOTICE: role "x2godbuser" does not exist, skipping NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "sessions_pkey" for table "sessions" NOTICE: CREATE TABLE / UNIQUE will create implicit index "sessions_display_key" for table "sessions" NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "messages_pkey" for table "messages" NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "used_ports_pkey" for table "used_ports" NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "mounts_pkey" for table "mounts" root@vserver12:/usr/lib# x2godbadmin --adduser user1 NOTICE: role "x2gouser_user1" does not exist, skipping create DB user "x2gouser_user1" 2) On Vserver Host (Cups Server): - Installed cups-x2go - Used "http://localhost:631" and added the virtual x2go printer and shared it (we couldn't see it on the client unless we shared it) - Used Visudo to add "x2goprint ALL=(ALL) NOPASSWD: /usr/bin/x2goprint - Set up SSH Keys using http://www.x2go.org/doku.php/wiki:advanced:multi-node:x2goserver-printing NOTE: we had trouble getting the keys to copy over (ssh-copy-id /usr/bin/ssh-copy-id: ERROR: No identities found). We cannot ping the Guest from the Host by server name (e.g., vserver1.mydomain.com) but can by ip address. We ended up creating /home/x2goprint/.ssh/authorized_keys and adding the contents of id_dsa-x2goprint.pub by hand. We then issued ssh -i /root/.ssh/id_dsa-x2goprint x2goprint(a)x192.168.1.112 and got: The authenticity of host '192.168.1.112 (192.168.1.112)' can't be established. RSA key fingerprint is dd:04:0f:56:5f:23:a8:71:e6:d8:aa:64:4c:91:16:0d. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.1.112' (RSA) to the list of known hosts. Permission denied (publickey). Is this "Permission denied (publickey)." the cause of our problems? It appears to have added an RSA key where we think the keys created where DSA... 3) Tested the x2go connection from the client. We could connect. Then tried to print: we can see the virtual x2go printer but cannot get any of the desired outcomes to occur (printing, get pdf to open using evince parameter). 4) Observations On the Vserver host (cups server) a) the print job files show up in /var/spool/cups b) in http://localhost:631 the print jobs show as completed c) there are no errors in /var/log/cups/error_log and the page_log and access_log seem to restister the successful print job and access to the cups When things are working: d) When things are working (straight connection from an x2go client to an x2go server - no vserver), on the server in home/user1/.x2go there is a healthly "spool" link to /tmp/.x2go-userx/spool/user1-50-1348322588_stDGNOME_dp24. When we print, some files get generated from there we think in the /tmp/.x2go...directory and the x2goprint code grabs them and uses them. But...on the guest e) On the setup we are trying to get working (client to Vserver Guest/X2goServer/PostgreSQL on a Vserver host), the spool link is shown as broken and the "on the fly" print files don't get created. 5) Help Q: is this some sort of DNS issue - we can't ping "vserver1.mydomain.com" but assume this is a protocol/firewall issue and not the problem in terms of printing. Q: John Sullivan wondered if this is a permissions issue (i.e., does the cups server have write access to the client spool directory): if this is the issue, we're not sure how to test or fix it. We looked at the permissions on the "working" vs. "not working" set ups on the spool directory and couldn't see any differences, but may be missing the point. Q: Vserver uses an fstab configu outside of the vserver itself where /tmp is listed as "none /tmp tmpfs size=128m,mode=1777 0 0" (and the /etc/fstab inside the Vserver only has "# UNCONFIGURED FSTAB FOR BASE SYSTEM"). Does the Vserver fstab set up get in the way of the spool link writing to the /tmp/.x2go....folder on the client? If so, this sound like it might be along the lines of John Sullivan's suggestion. Q: did the errors we got when generated the ssh keys matter "(Permission denied (publickey)."? The content of the Vserver/Cups Server host known hosts has: - a prefix of "|1|Ha2q5mBmGyrl4CYri92TPRb6NNU=|3gihEfRTYU8UHwI4FrQcSq29Exg=" - then the contents of the authorized_keys on the Vserver Guest/x2go server /home/user1/.ssh/authorized_keys file up to but excluding the "root(a)vserver1.mydomain.com" Or did we create DSA keys but somehow when trying to add them got crossed up with RSA keys (e.g., Warning: Permanently added '192.168.1.112' (RSA) to the list of known hosts."). We know this is tough to troubleshoot remotely, but any help very much appreciated. Best, Ted

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X2go, printing, Vserver, PostgreSQL - PS
by senrabdet＠aol.com 24 Sep '12

24 Sep '12

Hi All: This morning, per yesterday's email re: our trouble printing using a Vserver guest with postgreSQL and a Vserver host doubling as a cups server, we tried an experiment that didn't work but thought we'd add it in. -We increased the Vserver config fstab (not the fstab in the Vserver's /etc but the one in the Vserver config folder) to 1024M. -We started x2go and noted the session name -By hand, we created a folder with the session name in /tmp (i.e., tmp/.x2go-user1/spool/C-user1-50-1348405390_stDGNOME_dp24) on the Vserver guest/x2go server. -We erased the broken spool link, and created a new one that points to the new folder in /tmp again on the Vserver guest/x2go server. At that point, the link was active (not broken) but nothing changed in our inablity to print. I.e., we start a print job on the virtual x2go printer, all seems to go fine, but no joy in terms of evince starting on the client or getting a page to print. Still though, the print jobs are showing up in /var/spool/cups on the cups server, in the cups interface (http://localhost:631) the page_log in /var/log/cups on the cups server, and we don't get any errors in error_log in /var/log/cups on the cups server. That has been the case before. We think that fact that we can connect via x2go shows that the postgreSQL setup is working, that the print jobs are showing up on the cups server suggests that the printing ssh connection works (though we're less sure about this). Not sure what to make of this....but hope it was worth adding. Best, Ted

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X2Go release: nx-libs (incl. x2goagent) 3.5.0.15 (fixes broken glyphs when resuming)
by Mike Gabriel 22 Sep '12

22 Sep '12

Dear all, The X2Go Project is very very very proud to announce the release of - nx-libs incl. x2goagent (3.5.0.15) The release fixes the long waited for problem that session resuming is broken since current Linux system have started using libcairo >= 1.12.x. One of our core developers spent two days in the dark to find a patch for this: http://code.x2go.org/gitweb?p=nx-libs.git;a=blob;f=debian/patches/204_nxage… For more info on this bug, read the corresponding entry in our (new) bug tracker: http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=16 Stable packages for Debian and Ubuntu are currently building on our build server. @Packagers for other distros: Tarballs have been uploaded, please provide the new version of nx-libs to users of other distributions asap. Also, please test the new version with our distro and report back, if you find any issues. light+love, Mike NX-LIBS (changelog) =================== nx-libs (2:3.5.0.15-0) unstable; urgency=low [ Mike Gabriel ] * Improve 020_add-nxagent-wrapper.full.patch: Properly set NX_TEMP, make sure nxagent launches even with pam_tmpdir.so being in use. * Improve 023_add-x2goagent-wrapper.full.patch: Properly set NX_TEMP, make sure x2goagent launches even with pam_tmpdir.so being in use. * Add VERSION.x2goagent to package x2goagent package so x2goversion command lists up x2goagent in the list of X2Go server-side packages. * Refresh patch: 200_nxagent_check-binary-x2go-flavour.full.patch. * Make sure the NX_TEMP envvar gets set in all wrapper script for all nx* execubles. * Link libNX_Xrandr to a separate location where we can provide it as libXrandr. * Add patch: 220_nxproxy-bind-loopback-only.full+lite.patch, adds loopback option to nxproxy options and forces nxproxy to bind to loopback devices only. * /debian/control: + Maintainer change in package: X2Go Developers <x2go-dev(a)lists.berlios.de>. + Priority: optional. [ Oleksandr Shneyder ] * Add patch: 204-nxagent_repaint-solidpict.full.patch. Fixes repainting of SolidFill pictures by nxagent/x2goagent on reconnects. Closes upstream issue #16. -- Mike Gabriel <mike.gabriel(a)das-netzwerkteam.de> Fri, 21 Sep 2012 10:02:16 +0200 -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x… Dear all, The X2Go Project has found and fixed a bug in NX (redistributed) and is releasing a bugfix version (incl. x2goagent): - nx-libs incl. x2goagent (3.5.0.8) The release fixes an issue that has been brougth to our attention by Stefan Baur: <quote> > Steps to reproduce: > 1. Run Terminal as single application (not in a full-blown desktop > - everything works fine there) > 2. Type: kdialog --yesno "Test" > 3. Session will crash </quote> @Marcelo: This problem has been present in latest FreeNX packages as well, please check this commit in X2Go Git: http://code.x2go.org/gitweb?p=nx-libs.git;a=commitdiff;h=cf5a5980cf0b3dc0c0… light+love, Mike NX-LIBS ======= nx-libs (2:3.5.0.8-0) RELEASE; urgency=low * Reorganize patch names, to reflect patch inclusion into lite+full or full-only ,,NX (redistributed)'' tarball. * Update patch: 001_add-main-makefile.full+lite.patch, only build, install, clean etc. NX subprojects if the folder exists. * Package x2goagent is an ,,all'' package, not ,,any''. * Add folder /debian/patches-pending-evaluation with two newly discovered patches from git.etersoft.ru (AltLinux packaging repository for NX). * Fix patch: 109_nxagent_locale-utf8-compound-text.patch, fix crashes reported from Stefan Baur. Thanks for reporting and testing!!! -- Mike Gabriel <mike.gabriel(a)das-netzwerkteam.de> Sun, 22 Jan 2012 23:36:19 +0100 -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x… Dear all, The X2Go Project has found and fixed a bug in NX (redistributed) and is releasing a bugfix version (incl. x2goagent): - nx-libs incl. x2goagent (3.5.0.8) The release fixes an issue that has been brougth to our attention by Stefan Baur: <quote> > Steps to reproduce: > 1. Run Terminal as single application (not in a full-blown desktop > - everything works fine there) > 2. Type: kdialog --yesno "Test" > 3. Session will crash </quote> @Marcelo: This problem has been present in latest FreeNX packages as well, please check this commit in X2Go Git: http://code.x2go.org/gitweb?p=nx-libs.git;a=commitdiff;h=cf5a5980cf0b3dc0c0… light+love, Mike NX-LIBS ======= nx-libs (2:3.5.0.8-0) RELEASE; urgency=low * Reorganize patch names, to reflect patch inclusion into lite+full or full-only ,,NX (redistributed)'' tarball. * Update patch: 001_add-main-makefile.full+lite.patch, only build, install, clean etc. NX subprojects if the folder exists. * Package x2goagent is an ,,all'' package, not ,,any''. * Add folder /debian/patches-pending-evaluation with two newly discovered patches from git.etersoft.ru (AltLinux packaging repository for NX). * Fix patch: 109_nxagent_locale-utf8-compound-text.patch, fix crashes reported from Stefan Baur. Thanks for reporting and testing!!! -- Mike Gabriel <mike.gabriel(a)das-netzwerkteam.de> Sun, 22 Jan 2012 23:36:19 +0100 -- DAS-NETZWERKTEAM mike gabriel, dorfstr. 27, 24245 barmissen fon: +49 (4302) 281418, fax: +49 (4302) 281419 GnuPG Key ID 0xB588399B mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x… _______________________________________________ X2go-Announcement mailing list X2go-Announcement(a)lists.berlios.de https://lists.berlios.de/mailman/listinfo/x2go-announcement

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Bug#10: Corrected binary package for Ubuntu Precise amd64
by Lukas Laukamp 21 Sep '12

21 Sep '12

Hello, in the mail attachment is a corrected package based on the source package which provides the xdg-menus file with correct name for GNOME 3. Best Regards

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Bug#10: Workaround for dpkg configuring issue
by Lukas Laukamp 21 Sep '12

21 Sep '12

Hello, there is a workaround for this issue. Doing the following to setup x2gognomebindings correct: 1. Install the package from the repository (apt-get install x2gognomebindings) 2. Copy the file gnome-settings-x2go.menu to gnome-settings.menu (cp /etc/xdg/menus/gnome-settings-x2go.menu /etc/xdg/menus/gnome-settings.menu) 3. Install the package again (apt-get install x2gognomebindings, dpkg-reconfigure x2gognomebindings should also work) Note: On Ubuntu base systems do all the commands with sudo That's it than the package gets installed correct and works fine. Hope thats helpful. Best Regards

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Bug#34: Support for proxy server
by glpk xypron 21 Sep '12

21 Sep '12

Package: x2goclient Version: V.3.99.2.2 (Qt - 4.8.1) Severity: wishlist I would like to use x2goclient from behind a firewall without having to setup a tunnel with an external tool. My ssh server is running on port 443. The http method CONNECT can be used to create the connection over the firewall. Please, add proxy support to the x2goclient. Best regards Heinrich Schuchardt

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Bug#37: Add Desktop Sharing support to PyHoca-GUI
by Mike Gabriel 21 Sep '12

21 Sep '12

Package: pyhoca-gui Version: 0.2.0.4 Severity: wishlist Python X2Go already has desktop sharing support, so has pyhoca-cli. For PyHoca-GUI this has to be implemented in the GUI (menu, session profile manager, etc.). -- DAS-NETZWERKTEAM mike gabriel, rothenstein 5, 24214 neudorf-bornstein fon: +49 (1520) 1976 148 GnuPG Key ID 0x25771B31 mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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Bug#36: Fixed in Vcs for Python X2Go
by Mike Gabriel 21 Sep '12

21 Sep '12

tags #36 pending thanks A fix has been committed to X2Go Git: http://code.x2go.org/gitweb?p=python-x2go.git;a=commitdiff;h=3283c8321733ce… The fix will be in next release of Python X2Go (also in next release of PyHoca-GUI). Thanks for reporting this issue. Mike -- DAS-NETZWERKTEAM mike gabriel, rothenstein 5, 24214 neudorf-bornstein fon: +49 (1520) 1976 148 GnuPG Key ID 0x25771B31 mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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Bug#36: PyHoca resume session which was started on another client/pc
by Mike Gabriel 21 Sep '12

21 Sep '12

Package: python-x2go Severity: minor Version: 0.2.0.9 Tags: confirmed Hi Lukas, I have forwarded your mail to our bug tracker. Mike ----- Weitergeleitete Nachricht von lukas(a)laukamp.me ----- Datum: Thu, 20 Sep 2012 08:23:52 +0200 Von: Lukas Laukamp <lukas(a)laukamp.me> Betreff: [X2Go-User] PyHoca resume session which was started on another client/pc An: x2go-user(a)lists.berlios.de Hello all, I have a question about PyHoca. When I have two PCs for example one at home and one at work and start a session with PyHoca on the PC at home, why can't I resume this session with the PyHoca on the PC at work. Is there a way that makes it possible to resume this session at the PC at work or something like this? So I always have to start a second session and thats not the best because so I can't use already running programs with the state they have in the first session. Hope that someone can help me. Best Regards PS: Sorry for my bed english _______________________________________________ X2Go-User mailing list X2Go-User(a)lists.berlios.de https://lists.berlios.de/mailman/listinfo/x2go-user ----- Ende der weitergeleiteten Nachricht ----- -- DAS-NETZWERKTEAM mike gabriel, rothenstein 5, 24214 neudorf-bornstein fon: +49 (1520) 1976 148 GnuPG Key ID 0x25771B31 mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.x…

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Bug#36: PyHoca resume session which was started on another client/pc
by richter＠ecos.de 21 Sep '12

21 Sep '12

Hi, I have the same issue. I checked the color depth and both systems have 32Bit. I checked the pyhoca settings, both profiles are identically set up. The only difference is that one system is Win 7 64Bit, while the other one is Win7 32Bit. What I see is that on one computer the session name always ends with dp16 and on the other one with dp17. Does this have any meaning? Any idea what can be wrong? Gerald > -----Original Message----- > From: x2go-user-bounces(a)lists.berlios.de [mailto:x2go-user- > bounces(a)lists.berlios.de] On Behalf Of Mike Gabriel > Sent: Thursday, September 20, 2012 1:58 PM > To: x2go-user(a)lists.berlios.de > Subject: Re: [X2Go-User] PyHoca resume session which was started on > another client/pc > > Hi Lukas, > > On Do 20 Sep 2012 08:23:52 CEST Lukas Laukamp wrote: > > > Hello all, > > > > I have a question about PyHoca. When I have two PCs for example one at > > home and one at work and start a session with PyHoca on the PC at > > home, why can't I resume this session with the PyHoca on the PC at > > work. Is there a way that makes it possible to resume this session at > > the PC at work or something like this? So I always have to start a > > second session and thats not the best because so I can't use already > > running programs with the state they have in the first session. > > > > Hope that someone can help me. > > That should basically be possible. > > There is only one limitation that I hard-coded into Python X2Go (the X2Go > backend in PyHoca): if the color depth differs between clients, you cannot > resume sessions from one client to another. > > So, please check the colour depth on your client systems. If they are equal, > please report back, and we have to investigate further. > > BTW: your English is absolutely fine! > > Mike > > > -- > > DAS-NETZWERKTEAM > mike gabriel, rothenstein 5, 24214 neudorf-bornstein > fon: +49 (1520) 1976 148 > > GnuPG Key ID 0x25771B31 > mail: mike.gabriel(a)das-netzwerkteam.de, http://das-netzwerkteam.de > > freeBusy: > https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das- > netzwerkteam.de.xfb > _______________________________________________ > X2Go-User mailing list > X2Go-User(a)lists.berlios.de > https://lists.berlios.de/mailman/listinfo/x2go-user

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