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Registry

To be able to communicate with each other, services need to register in a common registry.

Configuration

The type of registry to use can be configured with the MICRO_REGISTRY environment variable. Supported values are:

nats-js-kv (Default)

Set the environment variable to nats-js-kv or leave it empty to use a nats-js key value store as registry.

  • Note: If not running build-in nats, MICRO_REGISTRY_ADDRESS needs to be set to the address of the nats-js cluster, which is the same value as OCIS_EVENTS_ENDPOINT.
  • Optional: Use MICRO_REGISTRY_AUTH_USERNAME and MICRO_REGISTRY_AUTH_PASSWORD to authenticate with the nats cluster.

kubernetes

When deploying in a kubernetes cluster, the Kubernetes registry can be used. Additionally, the MICRO_REGISTRY_ADDRESS environment variable needs to be set to the url of the Kubernetes registry.

memory

Setting the environment variable to memory starts an in-memory registry. This only works with the single binary deployment.

Deprecated Registries

These registries are currently working but will be removed in a later version. It is recommended to switch to a supported one.

  • nats
    Uses a registry based on nats streams. Requires MICRO_REGISTRY_ADDRESS to be set.
  • etcd
    Uses an etcd cluster as the registry. Requires MICRO_REGISTRY_ADDRESS to be set.
  • consul
    Uses HashiCorp Consul as registry. Requires MICRO_REGISTRY_ADDRESS to be set.
  • mdns
    Uses multicast dns for registration. This type can have unwanted side effects when other devices in the local network use mdns too.