Sōzu
The facts below are what the maker publishes about Sōzu, checked and dated. Our editors have not written about it yet.
The facts
Each one read from Sōzu's own pages, with the date it was checked.
Money
- Control plane
- External tools communicate with the main process through a Unix socket using a Protocol Buffers based binary protocol, and configuration is applied as atomic diffs.checked 8 Oct 2026
What it does
- Deployment
- The project publishes Linux binaries and Docker images for tagged releases and also documents building from source.checked 8 Oct 2026
- Dynamic configuration
- Sōzu applies configuration changes at runtime without reloading and supports multiple updates per second.checked 8 Oct 2026
- High availability
- Sōzu is designed to stay up while it upgrades itself and to avoid losing connections during configuration changes and binary upgrades.checked 8 Oct 2026
- Installation
- The project README says prebuilt binaries are available for Linux and Docker images are published for tagged releases.checked 8 Oct 2026
- Intended users
- The maker describes Sōzu as used by cloud and PaaS providers to manage changing web infrastructure and frequent app and customer additions.checked 8 Oct 2026
- License
- Sōzu is covered by the GNU Affero General Public License version 3.0 and above; the maker says businesses based on Sōzu should contribute back or contact Clever Cloud for a business agreement.checked 8 Oct 2026
- Limits
- The project says Sōzu uses fixed resource and connection limits to help avoid out-of-memory kills and increased latency under high connection counts.checked 8 Oct 2026
- Load balancing
- It detects broken backend servers and supports Round Robin, Random, Least_loaded, and Power of two load balancing algorithms.checked 8 Oct 2026
- Logging
- Its logger can send logs to stdout, files, TCP, UDP, and Unix sockets.checked 8 Oct 2026
- Metrics
- Metrics can be sent using a StatsD compatible protocol or aggregated locally for querying through the configuration socket.checked 8 Oct 2026
- Product
- Sōzu is an open source TCP and HTTP reverse proxy built in Rust for highly demanding web infrastructure.checked 8 Oct 2026
- Purpose
- Sōzu is an open-source TCP and HTTP reverse proxy built in Rust for demanding, dynamic web infrastructures.checked 8 Oct 2026
- Release verification
- The project README says releases include SHA256 checksums, sigstore keyless signatures, and SLSA build provenance attestations for tarballs.checked 8 Oct 2026
- Resource limits
- Sōzu uses fixed resource and connection limits to help avoid out of memory kills and increased latency under high connection counts.checked 8 Oct 2026
- Runtime configuration
- It applies configuration changes at runtime without reloading, including atomic configuration diffs through a Unix socket using a Protocol Buffers based protocol.checked 8 Oct 2026
- Security
- The project describes Rust as providing memory safety and says Sōzu workers are sandboxed, with backends shielded behind the proxy.checked 8 Oct 2026
- Support contact
- The site’s legal notice lists [email protected] for general support.checked 8 Oct 2026
- TLS
- Sōzu can act as a TLS endpoint and supports ring, AWS-LC, and OpenSSL cryptographic backends at compile time.checked 8 Oct 2026
- Upgrades
- Its main process and worker model is designed to allow upgrades while continuing to process requests.checked 8 Oct 2026
The company
- Headquarters
- Nantes, Francechecked 28 Sep 2026
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