stratos-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Rajkumar Rajaratnam (JIRA)" <>
Subject [jira] [Commented] (STRATOS-1234) Software Update Management Solution for Stratos
Date Tue, 10 Mar 2015 14:43:39 GMT


Rajkumar Rajaratnam commented on STRATOS-1234:

A small correction, I guess the API should be

*PUT /api/applications/{applicationId}/updateSoftware*
@Imesh, I am little confused about the HTTP method of this API, because we
don't actually create or update any RESOURCES in this API.


On Tue, Mar 10, 2015 at 7:54 PM, Rajkumar Rajaratnam <>

Rajkumar Rajaratnam
Committer & PMC Member, Apache Stratos
Software Engineer, WSO2

Mobile : +94777568639
Blog :

>  Software Update Management Solution for Stratos
> ------------------------------------------------
>                 Key: STRATOS-1234
>                 URL:
>             Project: Stratos
>          Issue Type: New Feature
>            Reporter: Imesh Gunaratne
>              Labels: gsoc2015, mentor
> Stratos uses Virtual Machines and Containers for hosting platform services on different
Infrastructure as a Service (IaaS) solutions. At present Puppet is used for orchestration
management on Virtual Machine based systems and manages all required software in Puppet Master.
Container based systems creates Docker images for each platform service by including required
software in the Docker image itself.
> In Virtual Machine use-case VM instances will communicate with Puppet master and execute
the software installation. The same approach can be used for applying software updates. 
> In Docker use-case we do not use Puppet because a new container with required software
can be started in few seconds. This is very efficient compared to using Puppet and installing
software on demand.
> The requirement of this project is to implement a core Stratos feature to propagate software
updates in a live PaaS environment.
> 1. Puppet based solution:
> - Push software updates of a cartridge to Puppet Master (might not need to automate).
> - Invoke the software update process via the Stratos API for a given application.
> - Stratos Manager could send a new event to trigger puppet agent in each instance to
apply the updates.
> 2. Docker based solution
> - Create a new docker image (with a new image id) for the cartridge with software updates
(might not need to automate).
> - Invoke the software update process via the Stratos API for a given application.
> - Autoscaler can implement a new feature to bring down existing instances and create
new instances with the new docker image id.
> Important!
> - In each scenario if updates are backward compatible, software update process should
execute in phases, it should not bring down the entire cluster to apply the updates. If so
the service will be unavailable for a certain time period. The idea is to apply the updates
to set of members at a time.
> - If the updates are not backward compatible, we could make the entire cluster unavailable
at once and apply the updates.
> - Member's state needs to be changed to a new state called "Updating" when applying the
> If there is an interest on doing this project please send a mail to imesh at apache dot
org by copying Apache Dev mailing list [1]. Please refer Stratos Wiki [2] for more information
on Stratos architecture and how it works.
> [1]
> [2]

This message was sent by Atlassian JIRA

View raw message