Static leader configuration

All nodes in the cluster need to know whether they are the leader or if not, where to find the leader. Generally, this section can be identical across all nodes. In this section, we need to specify the instance id of the leader node, and the public addresses of the observatory and scheduler services.

[static_leader]
leader_instance_id = "node-1"
observatory_service.public_addr = "127.0.0.1:4003"
scheduler_service.public_addr = "127.0.0.1:4002"

If the current node's instance id matches the leader_instance_id, it will run the observatory and scheduler services (if those components are enabled). This setup allows you to use a single configuration file across all nodes in the cluster, only overriding the instance_id on each node.

You can set any configuration option in the file using an environment variable in the format of PC_CUBLET__<SECTION>__<KEY>. For example, to override the instance_id for a node, you can set the environment variable PC_CUBLET__instance_id=node-2, and to disable the host metrics collection for a node, you can set the environment variable PC_CUBLET__observatory__host_metrics__enabled=false.