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From sudhansu7 <...@git.apache.org>
Subject [GitHub] cloudstack pull request #1849: CLOUDSTACK-9690: Scale CentOS7 VM fails with ...
Date Wed, 21 Dec 2016 17:45:46 GMT
GitHub user sudhansu7 opened a pull request:

    https://github.com/apache/cloudstack/pull/1849

    CLOUDSTACK-9690: Scale CentOS7 VM fails with error

    Scale CentOS7 VM fails with error "Cannot scale up the vm because of memory constraint
violation"
    
    When creating VM from CentOS 7 template on the XenServer with dynamically scaling enabled,
instance starts with base specified memory instead of memory * 4 as static limit.
    
    As the result, attempt to scale VM throws error in MS log:
    ```
    java.lang.RuntimeException: Job failed due to exception Unable to scale vm due to Catch
exception com.cloud.utils.exception.CloudRuntimeException when scaling VM:i-24-3976-VM due
to com.cloud.utils.exception.CloudRuntimeException: Cannot scale up the vm because of memory
constraint violation: 0 <= memory-static-min(2147483648) <= memory-dynamic-min(8589934592)
<= memory-dynamic-max(8589934592) <= memory-static-max(2147483648)
    ```
    REPO STEPS
    =============================
    
    1.     Enable dynamic scaling in Global settings
    2.     Register an CentOS 7 tempplate(with tools) and tick dynamic scaling
    3.     Deploy VM with this template
    4.     Start the VM and try to change service offering
    
    EXPECTED RESULT: VM should start with static limit 4x<assigned memory> and scale
up when offering is changed
    ACTUAL RESULT: VM starts with maximum static limit of <assigned memory> and doesn't
scale up with error in ms log :
    Cannot scale up the vm because of memory constraint violation:
    
    
    Root Cause: Xensever guest OS memory values are missing for 'CentOS 7'.
    
    Solution: Add Xensever guest OS memory values for 'CentOS 7'. But this needs patching
and restart of management server. In this fix the hardcoded values are moved from Java files
to database.
    
    1. Removed XenServerGuestOsMemoryMap from CitrixHelper.java
    This java file was holding a static in memory map named XenServerGuestOsMemoryMap. This
was the source for xenserver dynamic memory values(max and min). These values were moved to
guest_os_details table.
    
    2. DAO layer was modified to access these values.
    3. VirtualMachineTo object was modified to populate the dynamic memory values.
    4. addGuestOs and UpdateGuestOS api has been modified to update memory values.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/sudhansu7/cloudstack CLOUDSTACK-9690

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/cloudstack/pull/1849.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1849
    
----
commit 60021defea46b8ef8a87660070b4ad6c1c73af79
Author: Sudhansu <sudhansu.sahu@accelerite.com>
Date:   2016-12-21T17:41:12Z

    CLOUDSTACK-9690: Scale CentOS7 VM fails with error
    
    1. Removed XenServerGuestOsMemoryMap from CitrixHelper.java
    This java file was holding a static in memory map named XenServerGuestOsMemoryMap. This
was the source for xenserver dynamic memory values(max and min). These values were moved to
guest_os_details table.
    
    2. DAO layer was modified to access these values.
    3. VirtualMachineTo object was modified to populate the dynamic memory values.
    4. addGuestOs and UpdateGuestOS api has been modified to update memory values.

----


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