OPC UA Discovery Server

[francescobianca]

I'm trying to implement a discovery server but I'm having some problems. My main server at startup does this:

# ----------------- Register to Global Discovery Server ------------------
await self.server.register_to_discovery(url=OPCUA_GLOBAL_DISCOVERY_SERVER)

My discovery server simply does this:

await server.init()
server.set_endpoint('opc.tcp://0.0.0.0:4839')

logger.info('Starting server!')
async with server:
    while True:
        await asyncio.sleep(1)

Now if I call my API to return all the servers within the discovery it works correctly:

client_discovery = Client(url=OPCUA_GLOBAL_DISCOVERY_SERVER)
async with client_discovery:
    servers = await client_discovery.find_servers()
    response_list = []
    for server in servers:
        server_info = ...
        response_list.append(server_info)

But I have some doubts in the following cases:

1. If you drop the connection to the discovery server and pull up the main server is no longer added to the list.
2. If the main server falls down, it continues to appear in the list of servers in the discovery (I expect it to be deleted).

How can I handle these cases? Do you have any examples?

Thanks in advance!

Version

Python-Version: 3.9

opcua-asyncio Version (master branch, 0.9.92):