Basic Enrichers

Basic Enrichers.yaml

name: Bash Web Server and Riak Cluster (Brooklyn Example)

# this example *references* the previous one, 
# combining it with a stock blueprint for a Riak cluster,
# and shows how a sensor from the latter can be injected

services:

# reference template 2, overriding message to point at riak 
- type:           2-bash-web-server-template
  locations: []
  brooklyn.config:
    my.message:   $brooklyn:formatString("connected to Riak at %s",
                      $brooklyn:entity("riak-cluster").attributeWhenReady("log.location.list.joined"))
                      
    customize.command: |
      # create the web page to serve
      cat > index.html << EOF
      
      ${MESSAGE:-a Brooklyn sample}.
      
      
      EOF
      
# use the off-the-shelf Riak cluster
- type:           org.apache.brooklyn.entity.nosql.riak.RiakCluster
  id:             riak-cluster
  initialSize:    2
  # and add a policy to scale based on ops per minute
  brooklyn.policies:
  - type: org.apache.brooklyn.policy.autoscaling.AutoScalerPolicy
    brooklyn.config:
      metric: riak.node.ops.1m.perNode
      # more than 100 ops per second (6k/min) scales out, less than 50 scales back
      # up to a max of 3 riak nodes here (can be changed in GUI / REST API afterwards)
      metricLowerBound: 3000
      metricUpperBound: 6000
      minPoolSize: 1
      maxPoolSize: 3
      resizeUpStabilizationDelay: 30s
      resizeDownStabilizationDelay: 5m
      
  brooklyn.enrichers:
  - type: org.apache.brooklyn.enricher.stock.Aggregator
    # aggregate `log.location` sensors from children into a list
    brooklyn.config:
      enricher.sourceSensor: $brooklyn:sensor("log.location")
      enricher.targetSensor: $brooklyn:sensor("log.location.list")
      enricher.aggregating.fromMembers: true    
  - type: org.apache.brooklyn.enricher.stock.Joiner
    # create a string from that list, for use e.g. in bash scripts
    brooklyn.config:
      enricher.sourceSensor: $brooklyn:sensor("log.location.list")
      enricher.targetSensor: $brooklyn:sensor("log.location.list.joined")
      enricher.joiner.separator: .
      
location: byon