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Bug 1081049

Summary: OVIRT35 - [RFE] replace XML-RPC communication (engine-vdsm) with json-rpc based on bidirectional transport
Product: [Retired] oVirt Reporter: Barak <bazulay>
Component: ovirt-engine-coreAssignee: Piotr Kliczewski <pkliczew>
Status: CLOSED CURRENTRELEASE QA Contact: Petr Beňas <pbenas>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 3.5CC: bugs, gklein, iheim, oourfali, pbenas, pkliczew, pstehlik, rbalakri, s.kieske, yeylon
Target Milestone: ---Keywords: FutureFeature
Target Release: 3.5.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: infra
Fixed In Version: ovirt-engine-3.5.0_beta Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of:
: 1083763 (view as bug list) Environment:
Last Closed: 2014-10-17 12:24:29 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: Infra RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1083763    

Description Barak 2014-03-26 14:52:07 UTC 
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 Piotr Kliczewski 2014-05-23 12:22:39 UTC 
*** Bug 1100243 has been marked as a duplicate of this bug. ***
Comment 2 Petr Beňas 2014-08-14 11:17:26 UTC 
Jsonrpc can be selected when adding a host and despite of some minor bugs tracked separately it works.
Comment 3 Sandro Bonazzola 2014-10-17 12:24:29 UTC 
oVirt 3.5 has been released and should include the fix for this issue.