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From "Rohit Yadav (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CLOUDSTACK-8272) Improve password serving script by making it non-blocking non-locking concurrent server
Date Fri, 20 Feb 2015 07:44:11 GMT
Rohit Yadav created CLOUDSTACK-8272:
---------------------------------------

             Summary: Improve password serving script by making it non-blocking non-locking
concurrent server
                 Key: CLOUDSTACK-8272
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8272
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
    Affects Versions: 4.3.2, 4.4.2, 4.5.0, 4.6.0
            Reporter: Rohit Yadav
            Assignee: Rohit Yadav


The current reset password server serves one user VM at a time, uses a global lock per VR
and slows up VM starting process for a VM that is created by a template with reset password
scripts. No only reset password option, but when the VM starts for the first time this happens.
The way it serves password uses forking the process/scripts which eats up resources in both
process table and memory. For a concurrent launch of 30+ VM the VR hangs/fails. Possible solution
in the past includes increase the VR memory.

The solution would be to implement a concurrent single-process multi-threaded password server
that works both in basic/isolated network and in VPCs. It's hard to do this in bash, so we
can either implement a backward compatible python script that replaces the present bash script,
or a compiled program (like a native tool) in C/C++/Go/Rust.



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