Sounds like you want to use a client streaming rpc. The client will start an RPC, and periodically send messages to the server, which will never respond. This works well if the time between updates is small perhaps no more than a minute apart. If it's longer, it would be better to just make it unary because the connection will be at risk of being torn down by intermediary things.
If you trust the hardware you are running on, a common way of authing would be client side certificates, but we leave the problem of certificate rotation and revocation up to you. In gRPC, auth is more commonly (always?) done at the RPC level. Each RPC would need an auth token, like a JWT. If you want a command and control style system, you'll need to use a bidirectional streaming RPC. This would let the client phone home, and wait for messages to come down from the server to be executed. The client must initiate the connection and the RPC, but after that each side is a peer. There are examples on how to do each style of these commands in the github repos. Look for "Route Guide" examples on how to do it in each language. On Sunday, February 4, 2018 at 5:37:40 PM UTC-8, [email protected] wrote: > > I manage a fleet of linux devices and I need a way to send > telemetry data(CPU, memory, drives, etc.) from devices to a centralized > server and also send commands(linux service restarts for example) from > server to devices to execute on the device. The 15 different linux > devices are bare metal boxes in 15 different locations access to WAN with a > dynamic IP address. In a year the number of devices could jump to 100. > > I'm looking for suggestions on: > - how to gather telemetry data to send to grpc server > - how authenticate and identify devices > - how to run commands locally on each device and report back > > Thanks. > -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/grpc-io. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/66ed336c-6de9-4f80-b0e0-55b05338e45a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
