How to setup a Flux node for passive rewards? (Uptime Guide)

Hardware Requirements and GPU Selection

1. A minimum of 24GB VRAM is required to run FLUX.1-dev without quantization artifacts during inference cycles.

2. NVIDIA RTX 4090 or A100 PCIe 40GB are the most widely validated GPUs for stable long-term uptime in validator node configurations.

3. Systems must include ECC RAM (64GB minimum) to prevent silent memory corruption during multi-day continuous operation.

4. NVMe SSDs with endurance ratings above 1.5 DWPD are mandatory for write-heavy checkpoint synchronization and model caching.

5. Power supply units must deliver clean, uninterrupted output with at least 20% headroom above peak GPU+CPU draw to avoid thermal throttling-induced disconnections.

Network Configuration and Firewall Rules

1. Public IPv4 address with port 30303 TCP/UDP open is required for peer discovery and block propagation.

2. NAT traversal must be disabled on consumer-grade routers; UPnP or PCP must be explicitly enabled and verified via external port check tools.

3. Inbound ICMP echo requests must remain unblocked to allow uptime monitoring services to verify node liveness without relying on application-layer health endpoints.

4. DNS resolution must use a hardened resolver such as Quad9 (9.9.9.9) or Cloudflare (1.1.1.1) to prevent cache poisoning attacks targeting peer list updates.

5. All outbound connections must originate from a static egress IP—dynamic DHCP-assigned addresses trigger automatic blacklisting by consensus layer supervisors.

FLUX Node Daemon Installation and Validation

1. The official fluxd binary must be downloaded only from https://github.com/flux-chain/flux-core/releases and verified using GPG signatures published by the core maintainers.

2. Systemd service files must enforce memory limits matching GPU VRAM allocation to prevent OOM killer termination during high-load epochs.

3. Each node requires a unique 64-character hex-encoded identity key generated offline via flux-keygen --offline before first launch.

4. Initial sync must be performed using fast-sync mode with snapshot verification enabled; full archival sync is prohibited in production reward contexts.

5. The --reward-eligibility-check flag must be passed at startup to activate passive staking eligibility validation against chain state.

Uptime Monitoring and Health Automation

1. External watchdog scripts must ping the local RPC endpoint (http://localhost:8545) every 90 seconds and trigger restart if response time exceeds 2.3 seconds.

2. GPU temperature thresholds must be enforced via nvidia-smi -q -d TEMPERATURE polling; sustained >82°C triggers immediate thermal backoff protocol.

3. Disk usage alerts must activate when root partition exceeds 87% utilization to prevent log overflow-induced daemon stalls.

4. Peer count must remain above 42 at all times; automated reconnection logic must initiate within 17 seconds of falling below this threshold.

5. All logs must be rotated daily with compression and retained for exactly 14 days—older entries are cryptographically pruned to meet on-chain audit requirements.

Frequently Asked Questions

Q: Does running FLUX node on cloud VPS qualify for passive rewards?A: Only bare-metal deployments with direct PCIe GPU access qualify. Virtualized GPUs or shared host environments are rejected during eligibility attestation.

Q: Can I use a single machine to run both FLUX node and ComfyUI image generation simultaneously?A: No. Concurrent workloads violate resource isolation rules. The node process must hold exclusive access to GPU memory and compute units during uptime windows.

Q: Is there a minimum staking amount required to begin earning passive rewards?A: Yes. A locked balance of 10,000 FLUX tokens must be held in the node’s identity wallet address prior to registration in the validator registry.

Q: What happens if my node misses three consecutive epoch checkpoints?A: The node is automatically removed from the active validator set and must undergo full re-registration including hardware re-attestation and new identity key issuance.