# Xen & OpenNebula 5 **URL:** \ **Category:** Product Support\ **Created:** [September 5, 2016, 9:25am UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876 "2016-09-05T09:25:57Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Murasakiiru](https://avatars.discourse-cdn.com/v4/letter/m/22d042/32.png) [@Murasakiiru](https://forum.opennebula.io/u/Murasakiiru)\ **Post date:** [September 5, 2016, 9:25am UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/1 "2016-09-05T09:25:57Z")
Hi, Can I install OpenNebula 5.x to manage my Xen hosts ? In the documentation for v5.x, I don’t see any section for Xen hypervisor ☹ [http://docs.opennebula.org/5.0/deployment/node\_installation/index.html](http://docs.opennebula.org/5.0/deployment/node_installation/index.html) Can I use the same configuration in opennebula 4 and opennebula 5 to manage my Xen ? Mura ---
**Author:** ![ruben](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/ruben/32/19_2.png) [@ruben](https://forum.opennebula.io/u/ruben)\ **Post date:** [September 5, 2016, 10:36am UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/2 "2016-09-05T10:36:53Z")
Yes you can use the xen addon: > **[OpenNebula/addon-xen](https://github.com/OpenNebula/addon-xen)** > > Xen hypervisor add-on. Contribute to OpenNebula/addon-xen development by creating an account on GitHub. Support to the Xen hypervisor has not been removed from OpenNebula core, but the driver was moved to the add-on catalog to ease the contributions and support of the component from the comunity. The code is the same as the one used in 4.x versions, so you can keep the same configuration. (Probably if you are upgrading you don’t have to do anything, just keep using the drivers and conf.) Cheers ---
**Author:** ![Murasakiiru](https://avatars.discourse-cdn.com/v4/letter/m/22d042/32.png) [@Murasakiiru](https://forum.opennebula.io/u/Murasakiiru)\ **Post date:** [September 5, 2016, 3:31pm UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/3 "2016-09-05T15:31:35Z")
Oki, cool thank you for the info. ---
**Author:** ![jojo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jojo/32/4953_2.png) [@jojo](https://forum.opennebula.io/u/jojo)\ **Post date:** [October 17, 2016, 12:47pm UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/4 "2016-10-17T12:47:50Z")
I am having troubles using the xen drivers: i started to debug this issue already (removed error redirections in onehost\_helper.rb and made rsync verbose) rsync then told me that the driver never could be copied to the hosts because there are broken symlinks. where would i get these missing files from? they are not in the xen-addon github repo. oneadmin@poc1:~$ onehost sync --rsync poc3 - Adding poc3 to upgrade [========================================] 1/1 poc3 symlink has no referent: "/var/lib/one/remotes/xen/reconfigure" symlink has no referent: "/var/lib/one/remotes/xen/prereconfigure" symlink has no referent: "/var/lib/one/remotes/im/xen.d/collectd-client\_control.sh" symlink has no referent: "/var/lib/one/remotes/im/xen.d/collectd-client.rb" rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1183) [sender=3.1.0] Failed to update the following hosts: - poc3 ---
**Author:** ![jojo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jojo/32/4953_2.png) [@jojo](https://forum.opennebula.io/u/jojo)\ **Post date:** [October 17, 2016, 2:33pm UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/5 "2016-10-17T14:33:04Z")
alright, I guess I need those files: > **[OpenNebula/one](https://github.com/OpenNebula/one/tree/one-5.0/src/im_mad/remotes/common.d)** > > The open source Cloud Management Platform developed for the Enterprise :rocket: - OpenNebula/one do you provide them in one of the rpm packages? [http://downloads.opennebula.org/repo/5.0/CentOS/7/x86\_64/opennebula-5.0.2-2/](http://downloads.opennebula.org/repo/5.0/CentOS/7/x86_64/opennebula-5.0.2-2/) thanks ---
**Author:** ![jojo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jojo/32/4953_2.png) [@jojo](https://forum.opennebula.io/u/jojo)\ **Post date:** [October 17, 2016, 3:19pm UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/6 "2016-10-17T15:19:28Z")
tried to fix this by copying stuff from the one-5.0 git branch manually. here’s what i did: ``` cp -rv ~/git/one/src/im_mad/remotes/common.d /var/lib/one/remotes/im/xen.d/ cp -rv ~/git/one/src/tm_mad/common /var/lib/one/remotes/ vi /var/lib/one/remotes/im/xen-probes.d/poll.sh # change path: #../../vmm/xen/poll -t ../../xen/poll -t chmod +x /var/lib/one/remotes/xen/poll ``` now this is the error I am getting in oned.log: ``` Mon Oct 17 17:06:13 2016 [Z0][InM][D]: Monitoring host poc3 (11) Mon Oct 17 17:06:13 2016 [Z0][InM][I]: Command execution fail: 'if [-x "/var/tmp/one/im/run_probes"]; then /var/tmp/one/im/run_probes xen /var/lib/one//datastores 4124 20 11 poc3; else exit 42; fi' Mon Oct 17 17:06:13 2016 [Z0][InM][I]: ../../xen/poll:26:in `require': no such file to load -- poll_common (LoadError) Mon Oct 17 17:06:13 2016 [Z0][InM][I]: from ../../xen/poll:26 Mon Oct 17 17:06:13 2016 [Z0][InM][E]: Error executing poll.sh Mon Oct 17 17:06:13 2016 [Z0][InM][E]: Error executing collectd-client_control.sh Mon Oct 17 17:06:13 2016 [Z0][InM][I]: ExitCode: 1 ``` Am I on the right path? Any suggestions would be appreciated 🙂 Thanks and all the best Jojo ---
**Author:** ![jojo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jojo/32/4953_2.png) [@jojo](https://forum.opennebula.io/u/jojo)\ **Post date:** [October 18, 2016, 9:54am UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/7 "2016-10-18T09:54:12Z")
I am a step further I guess, I set the full path to poll\_common in ./…/vmm/xen/poll: ``` #require "poll_common" require '/var/lib/one/remotes/vmm/lib/poll_common.rb' ``` but now I am getting this error: ``` Tue Oct 18 11:35:45 2016 [Z0][ONE][E]: Error parsing host information: syntax error, unexpected VARIABLE, expecting EQUAL or EQUAL_EMPTY at line 1, columns 7:16. Monitoring information: Error executing sudo /usr/sbin/xentop -fbi2 ARCH=x86_64 MODELNAME="Intel(R) Xeon(R) CPU X5550 @ 2.67GHz" HOSTNAME=poc3 HYPERVISOR=xen TOTALCPU=1600 CPUSPEED=2666 TOTALMEMORY=33543168 FREEMEMORY=31076352 USEDMEMORY=2466816 USEDCPU=0 FREECPU=1600 NETTX=0 NETRX=0 ``` this command is working fine when i execute it on the “to be monitored” host: `sudo /usr/sbin/xentop -fbi2` my frontend is ubuntu14.04 and my xen hypervisor is centos6 and I use the debs and rpms ffrom the official 5.0.2 repos, could this have to do with the different paths? maybe the paths are different if you install ONE completely from git using the install script? maybe nobody ever tested the deb and rpm packages together with addon-xen? just guessing here… we had this running with opennebula 4.14 before and it was running fine event tough frontend and HV were different OSes. Anyone has actually running addon-xen without these problems? Should I open a bugreport for that? I will now have a look if this was reported already… ---
**Author:** ![jojo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jojo/32/4953_2.png) [@jojo](https://forum.opennebula.io/u/jojo)\ **Post date:** [October 18, 2016, 1:42pm UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/8 "2016-10-18T13:42:22Z")
I realized that I am getting above mentioned monitoring errors, but the host is working and it is possible to run vms. i gave up searching why the monitoring operations fails sometimes. one more thing i had to do on the frontend to get it working: ln -s /var/lib/one/remotes/xen /var/lib/one/remotes/vmm/xen and then of course: onehost sync --rsync poc3 With all the information in this thread it should be possible to file a git commit and repair addon-xen so it works out of the box again. Unfortunately I don’t have the time at the moment… What is actually the official way to report bugs? I think this: [http://dev.opennebula.org/projects/opennebula](http://dev.opennebula.org/projects/opennebula) but with addons there is no official way to report bugs? correct? so the only way to fix stuff there is to make a PR on github? Jojo ---
**Author:** ![ruben](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/ruben/32/19_2.png) [@ruben](https://forum.opennebula.io/u/ruben)\ **Post date:** [October 19, 2016, 2:38pm UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/9 "2016-10-19T14:38:42Z")
Hi Maybe it is a good idea to open a couple of issues in the Xen addon so we can tackle them from there: > **[OpenNebula/addon-xen](https://github.com/OpenNebula/addon-xen)** > > Xen hypervisor add-on. Contribute to OpenNebula/addon-xen development by creating an account on GitHub. Probably this issue is the same as: > > > I'm trying to configure a new node host with xen and having some trouble.. This log appears in oned.log. Someone else... THANKS! ---
**Author:** ![jojo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jojo/32/4953_2.png) [@jojo](https://forum.opennebula.io/u/jojo)\ **Post date:** [November 6, 2016, 10:43am UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/10 "2016-11-06T10:43:00Z")
Hi Ruben, yes correct this is exactely this issue. I sent you a PR: [https://github.com/OpenNebula/addon-xen/pull/11](https://github.com/OpenNebula/addon-xen/pull/11) I fixed the paths, permissions and broken symlinks. the only thing that remains is the monitoring error as also stated in jeparre’s issue. all the best Jojo ---
**Author:** ![jojo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/jojo/32/4953_2.png) [@jojo](https://forum.opennebula.io/u/jojo)\ **Post date:** [November 9, 2016, 3:57pm UTC](https://forum.opennebula.io/t/xen-opennebula-5/2876/11 "2016-11-09T15:57:37Z")
Ok let’s also discuss this in the forum and not only in the github issue, now that this should be actually fixed in the master branch: I just installed everything from addon-xen master and also made sure that I do not have leftovers of the old broken and partly self-fixed addon. I am still getting this error. Not every time when it tries to monitor the host, but about every second time it throws this error !?! Still the host is shown as “On” in onehost show, but it is "enough of an error to trigger the HOST\_HOOK and therefore certainly fences the host!!! Wed Nov 9 10:18:23 2016 [Z0][ONE][E]: Error parsing host information: syntax error, unexpected VARIABLE, expecting EQUAL or EQUAL\_EMPTY at line 1, columns 7:16. Monitoring information: Error executing sudo /usr/sbin/xentop -fbi2 I also installed the mentionend one fix #139 (just quickly manually changed the line in vnm\_mad/remotes/lib/vnmmad.rb) I am using One 5.0.2 on Ubuntu 16.04 Which commit(s) of Laurent Grawets PR is actually dealing with this error? That would help me to further debug this issue. Thank you very much!! all the best from Vienna Jojo