Article ID: 124466, created on Feb 15, 2015, last review on Jun 17, 2016

  • Applies to:
  • Virtuozzo 6.0
  • Virtuozzo containers for Linux


A container loses Unix socket permissions during online migration with conversion to ploop format. Before the migration:

[root@ct ~]# ls -al /var/lib/mysql/mysql.sock
srwxrwxrwx 1 mysql mysql 0 Nov 21 18:55 /var/lib/mysql/mysql.sock

After the migration:

[root@ct ~]# ls -al /var/lib/mysql/mysql.sock
srwxr-xr-x 1 mysql mysql 0 Jul  3 01:11 /var/lib/mysql/mysql.sock

As a result, applications cannot connect to MySQL using Unix domain socket.


The bug in rsync-static has been identified: write permissions are lost after the migration.


For Parallels Virtozzo Containers 4.7 the issue was fixed in Tools Update 4.7.0-440 in scope of the bug PCLIN-32435.

For Parallels Virtozzo Containers 4.6 corresponding bug PCLIN-32338 is not resolved yet, however the issue can be workarounded by replacing /usr/local/share/vzlinmigrate/rsync copied from the destination PCS 6.0 server.

Search Words

socket permission

migrate unix socket

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