On Sun, Mar 3, 2013 at 6:21 PM, Axton <axton.gr...@gmail.com> wrote: > I am attempting to migrate a container from one host to another. I am > running into issues that cause the migration to fail. > > Environment information: > - Build:Debian 6; updates, install RHEL kernel > - Kernel: > 042stab072.10 > > The only part that is failing is the live migration. If I stop the > container, I can migrate without any issue. > > I will try to look more into this, but wanted to see if it is a known issue. > > Axton Grams
The two machines were built identically and are patched at the same level, have the same hardware configuration, same drive and file system configuration. I did some things with the file systems to put things into an optimal arrangement. Here are the details of the file system configuration: Looking further at this, it appears that the vzctl 4.1.2 snapshot located at http://download.openvz.org/utils/vzctl/4.1.2/vzctl-4.1.2-1.x86_64.rpm does not support the chkpnt option. I tried the following command, and it returns the same error that the live migration returns: root@cluster-01:/var/log# vzctl chkpnt 5000 --dumpfile /tmp/5000.dump Setting up checkpoint... suspend... dump... Can not dump container: Invalid argument Checkpointing failed /var/log/kern.log contains the following entry for each failed chkpnt: Mar 4 17:44:57 cluster-01 kernel: [174834.884946] CT: checkpointing not supported yet for hidden pid namespaces. I found that the following kernel parameter caused the issue: kernel.pid_ns_hide_child=1 Too bad they don't work together. It is probably worth noting on the wiki pages or in the man pages. Here is the output from a successful live migration: root@cluster-01:~# vzmigrate -s -v -t --live cluster-02 5000 Starting live migration of CT 5000 to cluster-02 OpenVZ is running... Loading /etc/vz/vz.conf and /etc/vz/conf/5000.conf files Check if ploop is supported on destination node Next unused minor: 1017904 Check IPs on destination node: Preparing remote node Copying config file 5000.conf 100% 1570 1.5KB/s 00:00 Name fs01 assigned No changes in CT configuration, not saving Creating remote container root dir Creating remote container private dir Creating a container snapshot Creating snapshot {33d65014-8946-487c-93cc-4f17f4bd2527} Storing /vz/private/5000/Snapshots.xml.tmp Setting up checkpoint... suspend... get context... Checkpointing completed successfully Storing /vz/private/5000/root.hdd/DiskDescriptor.xml.tmp Creating delta /vz/private/5000/root.hdd/root.hdd.{f5e57811-b586-4e06-8957-3d63ca6d7c47} bs=2048 size=4614144 sectors Creating snapshot dev=/dev/ploop47831 img=/vz/private/5000/root.hdd/root.hdd.{f5e57811-b586-4e06-8957-3d63ca6d7c47} ploop snapshot {33d65014-8946-487c-93cc-4f17f4bd2527} has been successfully created Setting up checkpoint... join context.. dump... Checkpointing completed successfully Resuming... Snapshot {33d65014-8946-487c-93cc-4f17f4bd2527} has been successfully created Syncing private Live migrating container... Copying top ploop delta with CT suspend Sending /vz/private/5000/root.hdd/root.hdd.{f5e57811-b586-4e06-8957-3d63ca6d7c47} Setting up checkpoint... suspend... get context... Checkpointing completed successfully Dumping container Setting up checkpoint... join context.. dump... Checkpointing completed successfully Copying dumpfile dump.5000 100% 8734KB 8.5MB/s 00:00 Undumping container Restoring container ... Error in ploop_fsck (fsck_util.c:376): Dirty flag is set Adding delta dev=/dev/ploop63619 img=/vz/private/5000/root.hdd/root.hdd (ro) Adding delta dev=/dev/ploop63619 img=/vz/private/5000/root.hdd/root.hdd.{1cfb54ce-bade-4ca4-8882-ad322718974e} (ro) Adding delta dev=/dev/ploop63619 img=/vz/private/5000/root.hdd/root.hdd.{f5e57811-b586-4e06-8957-3d63ca6d7c47} (rw) Mounting /dev/ploop63619p1 at /vz/root/5000 fstype=ext4 data='balloon_ino=12,' Container is mounted undump... Setting CPU units: 1000 Configure veth devices: veth5000.20 veth5000.40 Adding interface veth5000.20 to bridge vmbr20 on CT0 for CT5000 Adding interface veth5000.40 to bridge vmbr40 on CT0 for CT5000 get context... Container start in progress... Restoring completed successfully Resuming container Resuming... Suspend + Dump: 0.42 Pcopy after suspend: 0.50 Copy dump file: 0.84 Undump + Resume: 5.98 ------ Total suspended time: 7.75 Cleanup Killing container Killing... Unmounting file system at /vz/root/5000 Unmounting device /dev/ploop47831 Container is unmounted Removing dumpfiles Destroying container Destroying container private area: /vz/private/5000 Container private area was destroyed Axton Grams _______________________________________________ Users mailing list Users@openvz.org https://lists.openvz.org/mailman/listinfo/users
