nfs backup

  • Check your MTU settings.

  • This post is deleted!

  • (debian nfs) -> mtu 1500
    xoa vm -> 1500
    xcp host ->

    [root@XCP01 ~]# ifconfig | grep mtu
    eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    eth1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
    eth2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    eth3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    eth4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    eth5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
    vif13.0: flags=4291<UP,BROADCAST,RUNNING,NOARP,MULTICAST>  mtu 1500
    vif18.0: flags=4291<UP,BROADCAST,RUNNING,NOARP,MULTICAST>  mtu 1500
    xapi7: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    xenbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    xenbr1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

  • So the problem is in the network between your XOA and the NFS share. Again, it's not a XOA issue.

    Don't forget to check your switch configuration too 🙂 There is something blocking NFS mount, and as you said, the problem is probably bigger than that!

  • @olivierlambert switch have default vaule (no jumbo frame enabled)

  • @akurzawa said in nfs backup:

    mount.nfs: Connection timed out

    Until you find the reason for that, you'll have problems. Double check your network (physical side, cables etc.), configuration, firewalls, etc. The culprit is somewhere there 🙂

  • I think its XCP host itself - remebmer when I could not get upgrade xoa? the xoa host was not pingable from xoa vm, but from xcp host - no problem
    but I have no knowledge to debug xcp host

  • Oliver - every other network service just works fine - I have only problems with xoa on xcp host....

  • I see. You can try to halt XOA VM, remove the virtual card, recreate it (double check it's on the right pool network), boot again and check. If you continue to have issues, feel free to open a post on XCP-ng forum describing your network issues on this VM again a NFS server (it's a good start).

  • Did issue get resolved. I have the same problem. Thanks

  • @marcusrushy please open a support ticket, we can access your XOA and push a workaround on your current install, until a next release 🙂

  • I have install from source is that a problem

  • You aren't in the right category then 😉 (this is the category for XOA, our virtual appliance). Please open a new post there describing exactly your issue, community will help when possible

  • Cheers. Sorry didn't realise. Read the forum and it described exactly what is happening to me 🙂

  • You can't mount a NFS share or you have error during backups?

  • Can't mount it.

  • XO is just sending a mount command to your OS. However, we can't guess what's the OS you are using and if you have NFS client available to do so. Also, we can't guess what's your NFS server configuration.

    So it's hard to help 😞 That's why we distribute Xen Orchestra with XOA, the virtual appliance where we control the environment (and why there is only community support for the sources).

    Anyway, try to use the exact same parameters to mount it manually until it works on the CLI. When it will be the case, if it's still broken in XO, it means it's a XO problem. Until then, I'm 99% sure it's not a XO issue.

  • I am using Open Media Vault too thats why I asked on here 🙂

    Will trying manually tonight.

  • Okay keep us posted then 🙂

  • Think I may have sorted my issue out. I have built 2 VMs are work to test 😉 . One with OMV and other with XO. I create an NFS share on OMV and again got permission error. The path I was trying was /sharedfolders/test where your would think it would be but it isn't. It is under /export/test. Changed the path to that and it worked. Will test tonight with a backup to see if I can write to it.


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