Looks good Reka,
We might need to get the minimum count of instances of a particular cluster.
We can get it per cluster which will be effective for all the network
partitions or per network partition.
If it is per cluster,
+ id
+ applicationPolicy[1..1]
+ appId
+ networkPartition[1..n]
+ id
+ activeByDefault
+ partition[1..n]
+ id
+ provider
+ properties[1..n]
+ childPolicies[1..n]
+ childId (Group alias or cartridge alias)
*+ min*
+ networkPartition[1..n]
+ id
+ partition[1..n]
+ id
+ max
If it is per network partition,
+ id
+ applicationPolicy[1..1]
+ appId
+ networkPartition[1..n]
+ id
+ activeByDefault
+ partition[1..n]
+ id
+ provider
+ properties[1..n]
+ childPolicies[1..n]
+ childId (Group alias or cartridge alias)
+ networkPartition[1..n]
+ id
*+ min*
+ partition[1..n]
+ id
+ max
@devs,
Which way do you guys think better?
Thanks.
On Sun, Nov 30, 2014 at 10:23 AM, Reka Thirunavukkarasu <r...@wso2.com>
wrote:
> Hi all,
>
> In grouping, as we are supporting deployment Policy in the *group level
> or in the cluster level*, it would be easy if we have a single place to
> define all the deployment policy of children. The advantages of defining
> global deployment policy as below:
>
> - Same application can be deployed in HA or in burst manner using
> different deployment Policy.
> * will be starting actual VMs after deploying the deployment Policy
> rather than starting it, once the application got deployed.
> * deployment Policy will be coupled with an application always.
>
> - No need to define multiple deployment policy per cluster level or group
> level
>
> - Validation can also happen in the single place
> * Each children's policy can be validated against the
> applicationPolicy whether relevant partition/Network partition is already
> defined or not
> * Each leave cluster should have a deployment policy either inherit
> from one of the parent group or define it by its own.
>
> - Partition can also be defined in the Deployment Policy itself
>
> Please find the proposed format for the deployment Policy for application
> as following:
>
> + id
> + applicationPolicy[1..1]
> + appId
> + networkPartition[1..n]
> + id
> + activeByDefault
> + partition[1..n]
> + id
> + provider
> + properties[1..n]
> + childPolicies[1..n]
> + childId (Group alias or cartridge alias)
> + networkPartition[1..n]
> + id
> + partition[1..n]
> + id
> + max
>
> Please find the definition of new elements in the Deployment Policy as
> below:
>
> *applicationPolicy* : will have definition of all the network partition
> and partition which will be used throughout the application.
>
> *activeByDefault* : If true means, that network partition will be used by
> default. If false, means it can be used when all the resources are
> exhausted(in bursting)
>
> *childPolicies* : Each child policy will refer the network partition and
> relevant partition from applicationPolicy to define their own deployment
> pattern. Please note that, if you define a childPolicy by referring to
> group, then underlying clusters/group will inherit the same policy.
>
> *max: *Maximum no of instances that can be handled by a partition.
> For group: max group instances can be in a partition
> For Cluster: max members that can be kept for a cluster instance
> in a partition.
>
> FYI: A sample Policy is attached here with.
>
> Please share your suggestions on this...
>
>
> Thanks,
> Reka
>
>
>
>
> --
> Reka Thirunavukkarasu
> Senior Software Engineer,
> WSO2, Inc.:http://wso2.com,
> Mobile: +94776442007
>
>
>
--
--
Lahiru Sandaruwan
Committer and PMC member, Apache Stratos,
Senior Software Engineer,
WSO2 Inc., http://wso2.com
lean.enterprise.middleware
email: lahi...@wso2.com blog: http://lahiruwrites.blogspot.com/
linked-in: http://lk.linkedin.com/pub/lahiru-sandaruwan/16/153/146
