When you deploy a function in localrun mode, it runs on the machine where you enter the commands – on your laptop, for example, or in an AWS EC2 instance.
You can use the localrun command to run a single instance of a function. To run multiple instances, you can use the localrun command multiple times.
The following is an example of how to use the localrun command.
bin/pulsar-admin functions localrun \ --py myfunc.py \ --classname myfunc.SomeFunction \ --inputs persistent://public/default/input-1 \ --output persistent://public/default/output-1
:::note
In localrun mode, Java functions use thread runtime; Python and Go functions use process runtime.
:::
By default, the function connects with a Pulsar cluster running on the same machine via a local broker service URL. If you want to connect it to a non-local Pulsar cluster, you can specify a different broker service URL using the --brokerServiceUrl flag.
bin/pulsar-admin functions localrun \ --broker-service-url pulsar://my-cluster-host:6650 \ # Other function parameters