Anso f3757b43c6 feat(fleet-sync): anchor replicas to a control fingerprint (#968)
A replica now binds to the first control that pushes to it. Subsequent
pushes from a different control are rejected with 409
CONTROL_IDENTITY_MISMATCH until an admin explicitly reanchors. Closes
the cross-control hijack window where any node_proxy bearer signed
against the replica's secret could overwrite security policies.

Wire protocol:
- Sender includes a stable 16-hex-char `controlIdentity` derived by
  SHA-256-truncating `system_state.instance_id` (the local UUID written
  once by LicenseService.initialize on first boot). Hostname rotations
  do not flag drift; only a SQLite reset or explicit reanchor breaks
  the binding.
- Receiver caches the fingerprint inside the same transaction that
  applies the row replacement and watermark write. Three states:
  null (fresh install), '' (post-reanchor), '<fingerprint>' (anchored).
- Empty `controlIdentity` is treated as legacy and accepted, so older
  controls keep working during rollout.

New endpoint:
- POST /api/fleet/role/reanchor (admin, requires `{override: true}`):
  clears the cached fingerprint, both `received_pushed_at:*` watermarks,
  and replicated rows of both resources, all in one transaction. The
  static cached fingerprint is also flushed defensively.

Public surface additions:
- `FleetSyncService.getControlIdentity()`: stable fingerprint for the
  outgoing push body.
- `FleetSyncService.reanchor()`: admin-driven anchor reset.
- `ControlIdentityMismatchError`: typed sentinel the route translates
  to 409 with structured body `{error, code, expected, got}`.

Tests:
- 9 new vitest cases covering first-sync persistence, mismatch
  rejection, matching acceptance, empty-incoming back-compat,
  post-reanchor un-anchored state, fingerprint stability, missing
  instance_id fallback, route-level mismatch, route-level reanchor
  with override gating.
- One ordered route-level scenario instead of cross-dependent it()
  blocks so test reordering cannot silently break the suite.
- Full backend suite: 1769 pass / 5 skipped.
2026-05-07 13:00:21 -04:00
2026-03-25 00:40:06 -04:00

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Sencho

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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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