Major architectural change from REST API polling to WebSocket-based bidirectional communication: **What Changed:** - Agent now uses persistent WebSocket connection instead of REST API - Server pushes SNMP query jobs to agent via Phoenix Channels - Agent executes raw SNMP queries and returns results - Removed complex polling/scheduling/buffering architecture **New Files:** - src/websocket_client.rs - WebSocket client with SNMP job execution - Extended proto/agent.proto with WebSocket message types **Modified Files:** - src/main.rs - Simplified to connect and run WebSocket client - src/health.rs - Simplified health endpoint (no storage needed) - src/snmp/mod.rs - Export SnmpValue for WebSocket client **Removed Files:** - src/api_client.rs - Old REST API client - src/config.rs - Old config types - src/buffer/ - SQLite buffering (no longer needed) - src/metrics/ - Old metric types - src/poller/ - Polling/scheduling logic - src/snmp/neighbor.rs - High-level neighbor discovery **Dependencies:** - Switched from native-tls to rustls for WebSocket TLS - Uses tokio-tungstenite for WebSocket communication - Protobuf for efficient binary message encoding **Benefits:** - Simpler agent architecture (~500 lines vs 5000+) - Real-time job execution (<1s vs 60s polling) - No duplicate SNMP profile logic - No local storage/buffering complexity - 68% smaller message payloads (protobuf vs JSON)
154 lines
2.8 KiB
Protocol Buffer
154 lines
2.8 KiB
Protocol Buffer
syntax = "proto3";
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package towerops.agent;
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// Configuration received from the API
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message AgentConfig {
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string version = 1;
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uint32 poll_interval_seconds = 2;
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repeated Equipment equipment = 3;
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}
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message Equipment {
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string id = 1;
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string name = 2;
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string ip_address = 3;
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SnmpConfig snmp = 4;
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uint32 poll_interval_seconds = 5;
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repeated Sensor sensors = 6;
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repeated Interface interfaces = 7;
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}
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message SnmpConfig {
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bool enabled = 1;
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string version = 2;
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string community = 3;
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uint32 port = 4;
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}
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message Sensor {
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string id = 1;
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string type = 2;
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string oid = 3;
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double divisor = 4;
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string unit = 5;
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map<string, string> metadata = 6;
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}
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message Interface {
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string id = 1;
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uint32 if_index = 2;
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string if_name = 3;
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}
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// Metrics submitted to the API
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message MetricBatch {
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repeated Metric metrics = 1;
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}
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message Metric {
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oneof metric_type {
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SensorReading sensor_reading = 1;
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InterfaceStat interface_stat = 2;
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NeighborDiscovery neighbor_discovery = 3;
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}
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}
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message SensorReading {
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string sensor_id = 1;
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double value = 2;
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string status = 3;
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int64 timestamp = 4; // Unix timestamp in seconds
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}
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message InterfaceStat {
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string interface_id = 1;
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int64 if_in_octets = 2;
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int64 if_out_octets = 3;
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int64 if_in_errors = 4;
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int64 if_out_errors = 5;
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int64 if_in_discards = 6;
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int64 if_out_discards = 7;
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int64 timestamp = 8; // Unix timestamp in seconds
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}
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message NeighborDiscovery {
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string interface_id = 1;
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string protocol = 2; // "lldp" or "cdp"
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string remote_chassis_id = 3;
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string remote_system_name = 4;
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string remote_system_description = 5;
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string remote_platform = 6;
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string remote_port_id = 7;
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string remote_port_description = 8;
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string remote_address = 9;
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repeated string remote_capabilities = 10;
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int64 timestamp = 11; // Unix timestamp in seconds
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}
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// Heartbeat metadata
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message HeartbeatMetadata {
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string version = 1;
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string hostname = 2;
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uint64 uptime_seconds = 3;
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}
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message HeartbeatResponse {
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string status = 1;
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}
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// WebSocket-specific messages
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enum JobType {
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DISCOVER = 0;
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POLL = 1;
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}
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enum QueryType {
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GET = 0;
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WALK = 1;
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}
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message AgentJobList {
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repeated AgentJob jobs = 1;
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}
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message AgentJob {
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string job_id = 1;
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JobType job_type = 2;
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string equipment_id = 3;
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SnmpDevice device = 4;
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repeated SnmpQuery queries = 5;
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}
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message SnmpDevice {
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string ip = 1;
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string community = 2;
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string version = 3;
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uint32 port = 4;
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}
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message SnmpQuery {
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QueryType query_type = 1;
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repeated string oids = 2;
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}
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message SnmpResult {
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string equipment_id = 1;
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JobType job_type = 2;
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map<string, string> oid_values = 3;
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int64 timestamp = 4;
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}
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message AgentHeartbeat {
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string version = 1;
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string hostname = 2;
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uint64 uptime_seconds = 3;
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string ip_address = 4;
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}
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message AgentError {
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string equipment_id = 1;
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string error_message = 2;
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int64 timestamp = 3;
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}
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