[Bug 1051080] Re: lxc-start-ephemeral hangs if bind mounting nfs homedir

[Dan Kegel]

apport information

** Tags added: apport-collected precise

** Description changed:

  On Ubuntu 12.04.1, ephemeral containers seem to conflict with NFS home
  directories.
  
  The user's home directory is on a remote NFS server.
  The original container is created with 
    sudo lxc-create -t ubuntu -n foobar -- -r lucid  --bindhome $LOGNAME
  The ephemeral container is started with
    lxc-start-ephemeral -o foobar
  The user logs in to the ephemeral container.  This hangs.
  
  After that, any reference to the home directory -- inside or outside of
  the container -- seems to hang.
  
  mount in the container shows:
  
  none on / type overlayfs (rw,relatime,lowerdir=/var/lib/lxc/buildhost2-ubu10,upperdir=/tmp/lxc-lp-v92y7NU)
  none on /mnt/home/builder type overlayfs (rw,relatime,lowerdir=/mnt/home/builder,upperdir=/var/lib/lxc/buildhost2-ubu10-temp-loNNGB5/ephemeralbind/mnt/home/builder)
  
  mount outside the container shows:
  obnas1a:/vol/homes/builder 419430400 362328576  57101824  87% /mnt/home/builder
  But sometimes, mount outside the container shows nothing for /mnt/home/builder after the problem happens.
  
  This seems 100% repeatable.
+ --- 
+ AlsaDevices:
+  total 0
+  crw-rw---T 1 root audio 116,  1 Sep 14 15:17 seq
+  crw-rw---T 1 root audio 116, 33 Sep 14 15:17 timer
+ AplayDevices: aplay: device_list:252: no soundcards found...
+ ApportVersion: 2.0.1-0ubuntu13
+ Architecture: amd64
+ ArecordDevices: arecord: device_list:252: no soundcards found...
+ AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
+ CRDA: Error: [Errno 2] No such file or directory
+ CurrentDmesg:
+  Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
+  dmesg: write failed: Broken pipe
+ DistroRelease: Ubuntu 12.04
+ InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120402)
+ Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
+ MachineType: VMware, Inc. VMware Virtual Platform
+ NonfreeKernelModules: vmci
+ Package: linux (not installed)
+ PciMultimedia:
+  
+ ProcEnviron:
+  TERM=xterm
+  PATH=(custom, user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
+ ProcFB: 0 svgadrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-30-generic root=UUID=51e9e90f-c222-4072-892d-871faa221c9b ro quiet splash
+ ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
+ PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
+ RfKill:
+  
+ Tags:  precise
+ Uname: Linux 3.2.0-30-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups:
+  
+ WifiSyslog:
+  
+ dmi.bios.date: 01/07/2011
+ dmi.bios.vendor: Phoenix Technologies LTD
+ dmi.bios.version: 6.00
+ dmi.board.name: 440BX Desktop Reference Platform
+ dmi.board.vendor: Intel Corporation
+ dmi.board.version: None
+ dmi.chassis.asset.tag: No Asset Tag
+ dmi.chassis.type: 1
+ dmi.chassis.vendor: No Enclosure
+ dmi.chassis.version: N/A
+ dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd01/07/2011:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
+ dmi.product.name: VMware Virtual Platform
+ dmi.product.version: None
+ dmi.sys.vendor: VMware, Inc.

** Attachment added: "AcpiTables.txt"
   https://bugs.launchpad.net/bugs/1051080/+attachment/3320835/+files/AcpiTables.txt

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Title:
  lxc-start-ephemeral hangs if bind mounting nfs homedir

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