This commit enables the existing gRPC and HTTP API from remote locations
as long as the user can provide a valid API key. This allows users to
control their headscale with the CLI from a workstation. 🎉
We dont seem to need the wireguard key anymore, we generate a key on
startup based on the new library and the users fetch it from /key.
Clean up app.go and update docs
This commit adds a sentral cache to keep track of clients whom has
requested an expiry time, but were we need to keep hold of it until the
second request comes in.
This commit is trying to DRY up the initiation of the gRPC client in
each command:
It renames the function to CLI instead of GRPC as it actually set up a
CLI client, not a generic grpc client
It also moves the configuration of address, timeout (which is now
consistent) and api to use Viper, allowing users to set it via env vars
and configuration file
This commit changes the way CLI and grpc-gateway communicates with the
gRPC backend to socket, instead of localhost. Unauthenticated access now
goes on the socket, while the network interface will require API key (in
the future).
This commit sets up the API and gRPC endpoints and adds authentication
to them. Currently there is no actual authentication implemented but it
has been prepared for API keys.
In addition, there is a allow put in place for gRPC traffic over
localhost. This has two purposes:
1. grpc-gateway, which is the base of the API, connects to the gRPC
service over localhost.
2. We do not want to break current "on server" behaviour which allows
users to use the cli on the server without any fuzz
