guide/blueprints/example_yaml/appserver-w-policy.yaml

name: appserver-w-policy
services:
- type: org.apache.brooklyn.entity.webapp.ControlledDynamicWebAppCluster
  brooklyn.config:
    cluster.initial.size: 1
    dynamiccluster.memberspec:
      $brooklyn:entitySpec:
        type: org.apache.brooklyn.entity.webapp.jboss.JBoss7Server
        brooklyn.config:
          wars.root: https://search.maven.org/remotecontent?filepath=org/apache/brooklyn/example/brooklyn-example-hello-world-sql-webapp/0.12.0/brooklyn-example-hello-world-sql-webapp-0.12.0.war # BROOKLYN_VERSION
          http.port: 8080+
          java.sysprops:
            brooklyn.example.db.url:
              $brooklyn:formatString:
              - "jdbc:%s%s?user=%s&password=%s"
              - $brooklyn:component("db").attributeWhenReady("datastore.url")
              - visitors
              - brooklyn
              - $brooklyn:external("brooklyn-demo-sample", "hidden-brooklyn-password")
  brooklyn.policies:
  - type: org.apache.brooklyn.policy.autoscaling.AutoScalerPolicy
    brooklyn.config:
      metric: $brooklyn:sensor("brooklyn.entity.webapp.DynamicWebAppCluster", "webapp.reqs.perSec.windowed.perNode")
      metricLowerBound: 10
      metricUpperBound: 100
      minPoolSize: 1
      maxPoolSize: 5
- type: org.apache.brooklyn.entity.database.mysql.MySqlNode
  id: db
  name: DB HelloWorld Visitors
  brooklyn.config:
    creation.script.password: $brooklyn:external("brooklyn-demo-sample", "hidden-brooklyn-password")
    datastore.creation.script.template.url: https://github.com/apache/brooklyn-library/raw/master/examples/simple-web-cluster/src/main/resources/visitors-creation-script.sql