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Article ID: 121864, created on Jun 2, 2014, last review on Sep 9, 2016

  • Applies to:
  • Operations Automation 5.5
  • Operations Automation 5.4


A task to remove old application templates from OA fails:

Queue name      hn_template_operation_xxx
Task name               Uninstall Virtuozzo template #12 (hn_id <NODE>)
Task description        Uninstall Virtuozzo template #aaa from Hardware Node #bbb
Queue status    Failed
Method name     taskUninstallTemplateFromHN on SCREF:VPSTasks:0
Last execution output   3502 : Can not remove packages: some Containers use package(s) .pa50-webalizer (OS .centos-5-x86_64)


The application template in question (.pa50-webalizer in the example above) is used by at least one VPS on the hardware node. As a result, it cannot be removed.

If POA shows the usage of the application template is 0 in Service Director > Virtozoo Manager > VPS Hardware Nodes > <NODE> > Templates > Application Templates, check usage on the hardware node itself. This can be done in the following way:

# grep pa50-webalizer /etc/vz/conf/*.conf
/etc/vz/conf/1039.conf:TEMPLATES=" .pa50-frontpage .ride_ImageMagick .pa52-php5-cgi .pa50-mysql-client .pa50-pgsql-client .pa50-webalizer .pa50-apache-httpd .pa52-proftpd .pa50-proftpd .pa54-pleskd .pa54-frontpage"


Update the template to newer version, then remove the old one. Note the OS in the example task.

  1. Create a repofile to be able to list packages

    For POA 5.4:

    # cat poa54.repo

    For POA 5.5:

    # cat poa55.repo  
  2. Compare the packages in the old template with packages in the new template

    # yum list webalizer --disablerepo=\* --enablerepo=poa54
    webalizer.x86_64  2.21_02-2.parallels
    # vzctl exec 1043 rpm -qi webalizer
    Group   : Applications/Internet Source RPM: webalizer-2.21_02-2.parallels.src.rpm
  3. If the packages are the same, it is safe to replace the old template with the new one. Install the new version of the application into VPS via POA through Virtuozzo Manager, and ensure that the task completes successfully

  4. Remove the reference to old application template from the VPS using /etc/vz/conf/<VPS_ID>.conf This is important since the older version and the new version of the package may use the same libs.

  5. Restart the original task to remove the application template in POA task manager to ensure the POA DB shows a consistent state.

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