Instance identification

Reference | Administration

If you are running multiple instances of the same application, either on a single VM/server/container, or across multiple hosts, it is often useful to assign each instance a unique ID.

You can provide an instance ID, to each instance of your application via a command line argument which is then made available to your application components if they need it.

Providing an ID via the command line

Start your application with the -i argument. E.g.:

myapp -i myid

You will see a message similar to:

29/Oct/2019:11:01:08 Z INFO  [grncInit] Instance ID: myid

Accessing the ID from your components

If your component implements instance.Receiver (e.g. implements the method RegisterInstanceID(*instance.Identifier)), the instance ID will be passed in to that method before the container starts your components.

Next: System configuration

Prev: Instance identification