NSA

NSA sees all, because NSA is the Networked Status Aggregator.

The idea is simple: The NSA server receives hartbeats over network sockets (currently only udp) and displays running services on a web interface (and, in the future, maybe does other stuff with them).

NSA is as simple as possible: Clients just send heartbeats and nsa displays new clients on the go. Other than deciding on where to listen, no further configuration is required. Maybe some sort of simple authentication will be implemented, but for now it's all just working out of the box.

This is the NSA server, the client is simply called nsa.

Running a Server

Install

npm install -g nsa-server

Options

run bin/nsa-server.js with these options:

• --config ./config.js Load Config File from $CWD/config.js
• --web http://localhost:9999/ HTTP Web Interface on localhost port 9999
• --web unix:/tmp/nsa.sock?mode=0760 Web Interface socket /tmp/nsa.sock with mode 0760
• --listen udp4://localhost:8888 Listen for Messages on localhost port 8888 with IPv4
• --listen udp6://localhost:8888 Listen for Messages on localhost port 8888 with IPv6

You can use --listen more than once.

See also config.js.dist;

Message Format

In case you want to expand it for your own purposes.

var message = [
	0,              // message format version
	0,              // message type (0=heartbeat,1=retire)
	0,              // sequence number of message
	"example",      // name of the service
	"example.host", // name of the node
	10000           // number of microseconds till next message
];