Bug 1083763 – PRD35 - [RFE] replace XML-RPC communication (engine-vdsm) with json-rpc based on bidirectional transport

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Bug 1083763 - PRD35 - [RFE] replace XML-RPC communication (engine-vdsm) with json-rpc based on bidirectional transport

Summary:	PRD35 - [RFE] replace XML-RPC communication (engine-vdsm) with json-rpc based...

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Virtualization Manager
Classification:	Red Hat
Component:	RFEs (Show other bugs)
Sub Component:
Version:	3.5.0
Hardware:	Unspecified Unspecified

Priority	high Severity unspecified
Target Milestone:	---
Target Release:	3.5.0
Assigned To:	Piotr Kliczewski
QA Contact:	Pavel Stehlik
Docs Contact:

URL:
Whiteboard:	infra
Keywords:	FutureFeature

Depends On:	1081049 1136876 1140175
Blocks:	1124129 rhev3.5beta 1156165
	Show dependency tree / graph

Reported:	2014-04-02 18:19 EDT by Barak
Modified:	2016-02-10 14:23 EST (History)
CC List:	12 users (show)

See Also:
Fixed In Version:	vt2.2
Doc Type:	Enhancement
Doc Text:
Story Points:	---
Clone Of:	1081049
Environment:
Last Closed:	2015-02-11 12:58:36 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	Infra
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2015:0158	normal	SHIPPED_LIVE	Important: Red Hat Enterprise Virtualization Manager 3.5.0	2015-02-11 17:38:50 EST

Groups: None (edit)

Description Barak 2014-04-02 18:19:13 EDT

+++ This bug was initially created as a clone of Bug #1081049 +++

The current communication between engine and vdsm is done using XML-RPC, where the engine actually acts as client and each vdsm is the server.
This pauses a few issues that when it comes to scale effect drastically:
- XML is expensive to parse
- This mechanism forces the engine to poll each vdsm frequently for information


The intent for this phase is to:
- move to json-rpc (same API)
- change transport to a real bidirectional transport to enable vdsm->engine events in the future

Comment 1 Tareq Alayan 2014-05-27 09:56:35 EDT

Hi Kliczewski

This feature looks like a wide infrastructure change. 
Can you please provide a URL to the spec page so we can design a test plan for this?

Comment 2 Piotr Kliczewski 2014-05-27 10:03:20 EDT

Here is a link [1] to design spec.


[1] http://www.ovirt.org/Features/Design/JsonRpc

Comment 4 Eyal Edri 2014-09-04 12:01:23 EDT

still not fixed on vt2.2, should come with next respin.

Comment 5 Oved Ourfali 2014-09-08 12:23:55 EDT

Feature can be tested... if it has bugs it doesn't mean it can't be tested.

Comment 8 errata-xmlrpc 2015-02-11 12:58:36 EST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-0158.html

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