GitHub user mikezaccardo opened a pull request:
https://github.com/apache/incubator-brooklyn/pull/1037
Add quorum check enricher and aggregator
This addition enables the creation of a sensor, defined in YAML, to set its
value based on whether a quorum of entities has has the necessary source sensor
value.
Example:
```
name: Quorum Check Test
location: localhost
services:
- type: org.apache.brooklyn.entity.group.DynamicCluster
name: Cluster
brooklyn.config:
initialSize: 5
memberSpec:
$brooklyn:entitySpec:
type:
org.apache.brooklyn.entity.software.base.EmptySoftwareProcess
name: Cluster Member
brooklyn.enrichers:
- type: org.apache.brooklyn.enricher.stock.Aggregator
brooklyn.config:
uniqueTag: service-all-is-up-aggregator
enricher.transformation.untyped: "isQuorate"
quorum.check.type: "allAndAtLeastOne"
quorum.total.size: $brooklyn:config("cluster.initial.size")
enricher.aggregator.excludeBlank: true
enricher.aggregating.fromMembers: true
enricher.sourceSensor: $brooklyn:sensor("service.isUp")
enricher.targetSensor: $brooklyn:sensor("cluster.isQuorate")
```
This creates a `cluster.isQuorate` sensor whose value depends on whether a
quorum of cluster members have `service.isUp` equal to true. In this example,
all members must have a true value since `allAndAtLeastOne` is the specified
`quorum.check.type`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mikezaccardo/incubator-brooklyn
quorum-check-enricher-aggregator
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-brooklyn/pull/1037.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1037
----
commit 2a7eb77ec44ae5ac83850fb4cbff729295806238
Author: Mike Zaccardo <[email protected]>
Date: 2015-11-17T20:28:26Z
Add quorum check enricher and aggregator
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