Dropwizard Oor Bundle

This bundle adds a healthcheck which can used to take the application out of rotation from a loadbalancer which uses /healthcheck endpoint for healthchecks This bundle compiles only on Java 17.

Usage

This makes it easier perform rolling deployments & maintenance of dropwizard applications

Build instructions

• Clone the source:

  git clone github.com/phaneesh/dropwizard-oor
  

• Build

  mvn install
  

Maven Dependency

• Use the following maven dependency:

<dependency>
    <groupId>com.github.phaneesh</groupId>
    <artifactId>dropwizard-oor</artifactId>
    <version>3.0.7-1</version>
</dependency>

Using Oor bundle

Bootstrap

    @Override
    public void initialize(final Bootstrap...) {
        bootstrap.addBundle(new OorBundle() {
            
            public boolean withOor() {
                return false;
            }
            
        });
    }

Tasks

• curl -XPOST http://host:adminport/tasks/oor for taking node out of rotation
• curl -XPOST http://host:adminport/tasks/bir for bringing node back into rotation

Note

Please allow the node to run for the grace period and a bit more that you have configured in your load balancer healthchecks so that the load balancer can drain all the requests gracefully.