facebookarchive/graceArchived
Grace
Grace is a lifecycle controller and process manager for Go applications designed to coordinate server transitions and implement system-level socket activation. It functions as a tool for managing secure HTTP servers and their transport layer security configurations across multiple ports.
The project enables zero-downtime deployments by handing over network sockets to successor processes, allowing existing requests to complete before an old process shuts down. It also provides socket activation management, which allows servers to start lazily only upon receiving connections through an external activation system.
The system covers high-availability infrastructure and network orchestration, including the ability to isolate public traffic from internal administrative services through multi-port listener management. It further manages resource handoffs and secure transport layer configurations to maintain continuous service availability.
Features
- Zero-Downtime Upgrades - Provides a mechanism for updating Go server binaries without dropping active network connections.
- Graceful Application Restarts - Facilitates graceful application restarts that allow existing requests to complete while new processes take over.
- Socket-Activated Orchestration - Implements socket-activated orchestration to defer server startup until a network connection is received.
- Go Network Programming - Provides advanced control over HTTP server socket lifecycles and TLS connections in Go.
- Descriptor Passing - Transfers active network socket file descriptors between process instances to ensure zero-downtime.
- TLS Servers - Provides an orchestrator for managing multiple secure HTTP servers and their TLS configurations across various ports.
- Zero-Downtime Socket Handovers - Implements zero-downtime socket handovers between processes during server binary updates.
- Go Server Process Managers - Acts as a lifecycle controller for Go applications to coordinate server transitions via system signals.
- Process Signal Management - Monitors system signals to trigger controlled, graceful transitions between server instances.
- Lazy Process Activation - Triggers server process initialization only upon the receipt of a connection via socket activation.
- Secure HTTP Lifecycles - Manages the lifecycle of secure HTTP servers across multiple ports with integrated transport layer security.
- High Availability Deployments - Maintains continuous service availability by ensuring active connections are not dropped during restarts.
- High Availability Infrastructure - Ensures high availability by handing over network listeners between processes during updates.
- Multi-Port Listeners - Supports binding to multiple network ports to isolate public traffic from administrative services.
