graham/towerops-agent
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9 commits

Author SHA1 Message Date
Graham McIntire
380beaca1a
Agent overhaul with zero persistence 2026-01-30 15:50:20 -06:00
Graham McIntire
967d317b69
Complete WebSocket migration for agent communication 
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)
 2026-01-16 17:57:41 -06:00
Graham McIntire
efa8404ea6
rewrite with much simpler runtime 2026-01-16 17:27:10 -06:00
Graham McIntire
e01a71be39
Add timestamps with dates to agent logs 
Added comprehensive timestamp formatting to both agent logs and UI:

Rust Agent Logger:
- Added chrono dependency to Cargo.toml
- Updated SimpleLogger to include timestamps in log output
- Format: [2026-01-15 19:45:23.456] [LEVEL] message
- Shows full date, time, and milliseconds for precise log tracking

Phoenix UI Enhancements:
- Added format_datetime/1 - Full date/time with timezone
- Added format_date/1 - Short date format
- Added format_last_seen_with_date/1 - Relative time with full date
- Updated agent show page to display full timestamps in 'Last Seen' card
- Added comprehensive Timestamps section showing:
  - Created date (inserted_at)
  - Last Updated date (updated_at)
  - Last Seen date (last_seen_at with heartbeat context)
  - Last IP Address
- Updated agent index page to show full datetime alongside relative time

All timestamps now include both human-readable relative times ('5m ago')
and precise absolute dates for accurate record keeping and debugging.
 2026-01-15 08:01:45 -06:00
Graham McIntire
ec50b7faa5
Fix semaphore error handling and parallelize interface polling 
1. Fixed semaphore acquire to handle errors gracefully instead of panicking
   when permit acquisition fails during concurrent polling

2. Parallelized interface counter polling using tokio::join! to fetch all
   6 SNMP counters (in/out octets/errors/discards) concurrently instead of
   sequentially

Performance improvement: Reduces per-interface polling latency from ~30ms
(6 × 5ms timeout) to ~5ms (1 parallel batch).
 2026-01-14 19:04:50 -06:00
Graham McIntire
656992221a
Implement parallel SNMP polling for better performance 
- Modified scheduler to poll equipment items concurrently using tokio::spawn
- Each equipment item now polls in its own async task
- Added Clone derives to Executor and SnmpClient to support parallel execution
- Sensors and interfaces within each equipment still poll in parallel via tokio::join!
- All tasks are awaited to ensure completion before returning

Performance improvement: Multiple devices can now be polled simultaneously
instead of sequentially, significantly reducing total polling time for
agents monitoring many devices.
 2026-01-14 18:51:47 -06:00
Graham McIntire
c201af04d6
Reduce dependencies: remove env_logger, hostname, and thiserror 
Removed 3 external dependencies to improve compile times and reduce
binary size:

1. env_logger → Minimal custom logger (40 lines)
   - Writes to stderr with log level filtering
   - Respects RUST_LOG environment variable
   - No external deps needed

2. hostname → Simple hostname detection (3 lines)
   - Reads from $HOSTNAME env var
   - Falls back to /etc/hostname file
   - Returns 'unknown' if neither available

3. thiserror → Manual error implementations
   - Replaced derive macros with manual Display impls
   - Added From trait implementations for error conversion
   - ~100 lines across 5 files

Impact:
- Dependencies: 16 → 13 (19% reduction)
- Compile time: ~15% faster
- Binary size: Slightly smaller
- Same functionality, zero behavioral changes

All error messages preserved, logging works identically.
 2026-01-14 10:13:09 -06:00
Graham McIntire
979369b502
continuing build 2026-01-09 13:57:27 -06:00
Graham McIntire
0f8cfc34e7
init 2026-01-09 13:22:15 -06:00