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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CHUKWA-211) Create symlink in %file for RPM
Date Fri, 15 May 2009 01:59:45 GMT

     [ https://issues.apache.org/jira/browse/CHUKWA-211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Yang updated CHUKWA-211:
-----------------------------

    Attachment: CHUKWA-211.patch

Ant task to generate rpm has a couple limitations.  Ideally, we want to prevent the use of
Makefile in our RPM build to prevent unnecessary nested build procedures.  However, this means
we can't create symlink in %install for RPM build.  In addition, Chukwa RPM is design to install
in user defined directory.  If version 1 of the RPM build is installed in /usr/local/chukwa-1
and version 2 is installed in /usr/local/chukwa-2.  It is difficult to keep track weather
the symlink should be removed during the upgrade.  Hence, the only option is to manage the
symlink removal via a fixed file which will always exist between different version of the
rpm.  

/etc/init.d/chukwa-collector is a fixed file which always exist across chukwa version.  The
script is changed to detect existence of this file to determine if the RPM is executed as
an uninstall or upgrade.  Symlink removal logic will base on the detection and remove at the
right time.

> Create symlink in %file for RPM
> -------------------------------
>
>                 Key: CHUKWA-211
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-211
>             Project: Hadoop Chukwa
>          Issue Type: Improvement
>          Components: build and test code
>    Affects Versions: 0.1.2
>         Environment: Redhat EL 5.1, Java 6
>            Reporter: Eric Yang
>            Assignee: Eric Yang
>            Priority: Blocker
>             Fix For: 0.1.2
>
>         Attachments: CHUKWA-211.patch
>
>
> For Chukwa 0.1.1.5 release, it used to create /services/chukwa-*/run as files.  In 0.1.2,
this has been changed to use symlink in /services.  However, the symlink is in %post and %postun.
 This is a problem for upgrading the RPM file.  The symlink should be created at build time.

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