The update of rhn-virtualization-host affecting autostart of the service.

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 5.5
  • rhn-virtualization-host-5.4.14-8.el5sat

Issue

  • When rhn-virtualization-host package is updated, the links of the service script under /etc/rc.d/rcX.d are deleted.

  • How reproducible: Always

  • Step to Reproduce:

    • Check package's version.
      (e.g. update from 5.3.0-14.el5sat to 5.3.0-18.el5sat.)
    # rpm -q rhn-virtualization-host
rhn-virtualization-host-5.3.0-14.el5sat
    • Check the registration of service script.
    # chkconfig --list | grep rhn-virtualization-host
rhn-virtualization-host 0:off 1:off 2:on 3:on 4:on 5:on 6:off
    • Update package.
    # yum update -y rhn-virtualization-host
# rpm -q rhn-virtualization-host
rhn-virtualization-host-5.3.0-18.el5sat
  • Actual results:
# chkconfig --list | grep rhn-virtualization-host
(no outputs)
  • Expected results:
# chkconfig --list | grep rhn-virtualization-host
rhn-virtualization-host 0:off 1:off 2:on 3:on 4:on 5:on 6:off

Resolution

This fix has been released as rhn-virtualization-host-5.4.14-9.el5sat

https://access.redhat.com/errata/RHBA-2012:0573

Note: This will take two updates for the customer will see the improved behaviour. The first update will be affected by the bug in the previous version but will fix the problem so that the next update will not be affected by the bug.

Root Cause

The patch should be like following.

@@ -85,7 +85,9 @@
 /sbin/service crond condrestart

 %preun host
-/sbin/chkconfig --del rhn-virtualization-host
+if [ $1 = 0 ]; then
+  /sbin/chkconfig --del rhn-virtualization-host
+fi

 %postun host
 /sbin/service crond condrestart

Diagnostic Steps

Please note that even if we release a new package which includes the above patch, updating to the package doesn't work as expected because the updating uses preun section in old package. Thus, we need to update twice to get an expected result.

Updating from old package to new package(but old preun section is used):

[root@rhel58 ~]# rpm -q rhn-virtualization-host
rhn-virtualization-host-5.4.14-8.el5sat
[root@rhel58 ~]# chkconfig --list | grep rhn-virtualization-host
rhn-virtualization-host 0:off   1:off   2:on    3:on    4:on    5:on    6:off
[root@rhel58 ~]# rpm -Uhv rhn-virtualization-host-5.4.14-9.bz646284.el5.noarch.rpm rhn-virtualization-common-5.4.14-9.bz646284.el5.noarch.rpm 
Preparing...                ########################################### [100%]
   1:rhn-virtualization-comm########################################### [ 50%]
   2:rhn-virtualization-host########################################### [100%]
Stopping crond: [  OK  ]
Starting crond: [  OK  ]
Stopping crond: [  OK  ]
Starting crond: [  OK  ]
[root@rhel58 ~]# chkconfig --list | grep rhn-virtualization-host
[root@rhel58 ~]#

Updating from new package to 2nd new package(preun section in 1st new package is used):

[root@rhel58 ~]# rpm -q rhn-virtualization-hostrhn-virtualization-host-5.4.14-9.bz646284.el5
[root@rhel58 ~]# chkconfig --list | grep rhn-virtualization-host
rhn-virtualization-host 0:off   1:off   2:on    3:on    4:on    5:on    6:off
[root@rhel58 ~]# rpm -Uhv rhn-virtualization-host-5.4.14-10.bz646284.el5.noarch.rpm rhn-virtualization-common-5.4.14-10.bz646284.el5.noarch.rpm 
Preparing...                ########################################### [100%]
   1:rhn-virtualization-comm########################################### [ 50%]
   2:rhn-virtualization-host########################################### [100%]
Stopping crond: [  OK  ]
Starting crond: [  OK  ]
Stopping crond: [  OK  ]
Starting crond: [  OK  ]
[root@rhel58 ~]# chkconfig --list | grep rhn-virtualization-host
rhn-virtualization-host 0:off   1:off   2:on    3:on    4:on    5:on    6:off
[root@rhel58 ~]#

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