Rohit Yadav created CLOUDSTACK-8272:
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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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