Anso 27660f622b fix(fleet-sync): version the wire protocol and serialize per-node pushes (#967)
Hardens the scan-policy and CVE-suppression replication channel as the
foundation of a multi-PR fleet sync hardening track. No new endpoints,
no new tables, no schema changes; receivers still tolerate legacy
payloads (absent pushedAt and controlIdentity) for rollout safety.

Wire protocol:
- Sender stamps every push with a strictly-increasing pushedAt and a
  placeholder controlIdentity. Receiver rejects strictly-older pushedAt
  with 409 STALE_SYNC_PUSH so the next write retries.
- pushedAt comparison plus row replacement plus watermark write run in a
  single SQLite transaction; a partial-write window cannot leave the
  watermark behind the row state.

Concurrency and limits:
- Per-node mutex on the sender so concurrent control writes serialize
  per remote and never apply older state on top of newer.
- Sender-side row cap at MAX_SYNC_ROWS=5000 with a 6-hour throttled
  truncation alert so flapping configs cannot flood the operator.
- Route-level body limit raised to 5MB on POST /api/fleet/sync/:resource
  only; the global 100KB cap is unchanged. Oversize bodies return a
  structured 413 SYNC_PAYLOAD_TOO_LARGE.

Determinism and hygiene:
- getMatchingPolicy gains an id-ASC tiebreaker so two replicas resolve
  the same winner when policies tie on scope class.
- Inline comment documents why getMatchingPolicy filters node_id at SQL
  yet still relies on JS identity matching for replicated rows.
- Comment on the receive endpoint documents why no requirePaid is
  enforced (control's tier authorizes; replica trusts the bearer).
- STALE_SYNC_PUSH 409s no longer record a node failure; they are
  expected protocol outcomes, not health issues.

Public surface additions:
- DatabaseService.transaction(fn): generic SAVEPOINT-friendly wrapper.
- DatabaseService.getLocalScanPolicies / getLocalCveSuppressions: SQL
  filter on replicated_from_control = 0.
- StaleSyncPushError: typed sentinel the route translates to 409.
- fleetSyncConstants: shared MAX_SYNC_ROWS, body limit, state-key and
  error-code maps so the wire protocol has one source of truth.

Tests:
- 24 new vitest cases across fleet-sync-service, fleet-sync-routes, and
  database-matching-policy covering monotonic pushedAt, per-node
  serialization, row truncation and throttle, stale-push suppression,
  receiver back-compat, oversize-body 413, deterministic matching.
- Full backend suite: 1757 pass / 5 skipped.
2026-05-07 12:53:13 -04:00
2026-03-25 00:40:06 -04:00

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Sencho

Docker Hub Docker Pulls License

Self-hosted Docker Compose management with self-healing infrastructure, atomic deployments, and multi-network fleet control. Built for engineers who want Kubernetes-grade reliability without the complexity.

Sencho Dashboard


Why Sencho?

Works across every network

Pilot Agent tunnels through NAT and firewalls so every node in your fleet is reachable from the dashboard, regardless of network topology. No port-forwarding. No VPN. No SSH.

Containers crash. Sencho fixes them.

Auto-heal policies watch your stacks and take action (restart, redeploy, notify) before you even open your laptop. Define the rules once; the recovery runs itself.

Deploy safely without Kubernetes

Atomic deployments mean a failed stack never leaves you in a broken half-up state. Rollback is one click. Deploy enforcement policies block non-compliant images before they ever run.

Define behavior, not procedures

Auto-update policies, scheduled operations, webhooks, and deploy enforcement let you codify how your infrastructure behaves. The UI is for oversight; the engine runs the work.


Features

Stack Management

  • Monaco editor with syntax highlighting and multi-file support
  • Atomic deployments with live progress tracking and one-click rollback
  • Git-sourced stacks: pull and sync from any repository
  • Stack file explorer and label management

Monitoring & Observability

  • Live log streaming with search and filtering across all containers
  • CPU, RAM, and disk threshold alerts with configurable actions
  • Container stats, health checks, and image update notifications
  • Global observability view across all nodes in your fleet

Fleet Management

  • Multi-node via authenticated HTTP/WebSocket proxy (no SSH, no remote socket)
  • Fleet view and sync for coordinated updates across nodes
  • Pilot Agent for NAT traversal and firewall-crossing connections
  • Node compatibility checks before deploying

Automation

  • Auto-heal policies: detect and recover from container failures automatically
  • Auto-update policies: roll out new image versions on your terms
  • Scheduled operations with cron expressions
  • Webhooks and deploy enforcement rules

Security

  • SSO: custom OIDC (any spec-compliant provider), Google/GitHub/Okta presets, LDAP/Active Directory
  • Two-factor authentication and RBAC with deployer, node-admin, and auditor roles
  • Audit log, vulnerability scanning with VEX suppression, and private registry support
  • Deploy enforcement to block non-compliant images

Operations

  • App Store with one-click LinuxServer.io template deployments
  • Sencho Cloud Backup for off-site stack archives
  • Notification routing to Slack, Discord, email, and webhooks
  • Global search across stacks and containers

Architecture

Sencho's architecture combines a Distributed API model with an optional Pilot Agent for complex networks.

  • Distributed API: Remote nodes are managed by proxying authenticated HTTP/WebSocket requests to autonomous Sencho instances running on each server. No SSH. No remote Docker socket exposure. No polling agent. Each node speaks the same Sencho API, so the dashboard is just another client.
  • Pilot Agent: For nodes behind NAT or strict firewalls, the Pilot Agent establishes secure outbound tunnels to the primary dashboard instance. This guarantees full fleet visibility and management without requiring port-forwarding, VPNs, or inbound network access.

Quick Start

Docker run (quickest):

docker run -d --name sencho \
  -p 1852:1852 \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v sencho_data:/app/data \
  -e COMPOSE_DIR=/opt/docker \
  saelix/sencho:latest

Docker Compose (recommended for production):

services:
  sencho:
    image: saelix/sencho:latest
    container_name: sencho
    restart: unless-stopped
    ports:
      - "1852:1852"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./data:/app/data
      # 1:1 Compose Path Rule: the host path MUST match the container path
      - /opt/docker:/opt/docker
    environment:
      - COMPOSE_DIR=/opt/docker
      - DATA_DIR=/app/data
docker compose up -d

Then open http://your-server:1852 and create your admin account.

See the full documentation for configuration details, multi-node setup, and more.


Documentation


Development

# Backend (Express + TypeScript)
cd backend && npm install && npm run dev

# Frontend (React + Vite)
cd frontend && npm install && npm run dev

The frontend dev server proxies /api requests to the backend on port 1852.

Contributing

See CONTRIBUTING.md for development setup and PR guidelines.

Security

See SECURITY.md for vulnerability reporting. Do not open public issues for security vulnerabilities.

License

Sencho is licensed under the Business Source License 1.1. Production use is allowed; the only restriction is offering Sencho as a competing hosted or managed service. On 2030-03-25, the license automatically converts to Apache 2.0.

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Self-hosted Docker Compose management platform. Great for homelabs, small DevOps teams, and platform engineers.
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