
gobetween - modern & minimalistic load balancer and reverse-proxy for the ☁ Cloud era.
Current status: Under active development. Currently in use in several highy loaded production environments.
Features
-
Fast L4 Load Balancing
-
Clear & Flexible Configuration with TOML or JSON
- File - read configuration from the file
- URL - query URL by HTTP and get configuration from the response body
- Consul - query Consul key-value storage API for configuration
-
Management REST API
- System Information - general server info
- Configuration - dump current config
- Servers - list, create & delete
- Stats & Metrics - for servers and backends including rx/tx, status, active connections & etc.
-
Discovery
- Static - hardcode backends list in config file
- Docker - query backends from Docker / Swarm API filtered by label
- Exec - execte arbitrary program and get backends from it's stdout
- JSON - query arbitrary http url and pick backends from response json (of any structure)
- Plaintext - query arbitrary http and parse backends from response text with customized regexp
- SRV - query DNS server and get backends from SRV records
- Consul - query Consul Services API for backends
- LXD - query backends from LXD
-
Healthchecks
- Ping - simple TCP ping healtcheck
- Exec - execute arbitrary program passing host & port as options, and read healtcheck status from the stdout
- Probe - send specific bytes to backend (udp, tcp or tls) and expect correct answer (bytes or regexp)
-
Balancing Strategies (with SNI support)
- Weight - select backend from pool based relative weights of backends
- Roundrobin - simple elect backend from pool in circular order
- Iphash - route client to the same backend based on client ip hash
- Iphash1 - same as iphash but backend removal consistent (clients remain connecting to the same backend, even if some other backends down)
- Leastconn - select backend with least active connections
- Leastbandwidth - backends with least bandwidth
-
Integrates seamlessly with Docker and with any custom system (thanks to Exec discovery and healtchecks)
-
Single binary distribution
Architecture
Usage
Hacking
- Install Go 1.10+ https://golang.org/
$ git clone git@github.com:yyyar/gobetween.git
$ make deps
$ make run
Debug and Test
Run several web servers for tests in different terminals:
$ python -m SimpleHTTPServer 8000
$ python -m SimpleHTTPServer 8001
Instead of Python's internal HTTP module, you can also use a single binary (Go based) webserver like:
https://github.com/udhos/gowebhello
gowebhello has support for SSL sertificates as well (HTTPS mode), in case you want to do quick demos
of the TLS+SNI capabilities of gobetween.
Put localhost:8000
and localhost:8001
to static_list
of static discovery in config file, then try it:
Enable profiler and debug issues you encounter
[profiler]
enabled = true # false | true
bind = ":6060" # "host:port"
It's Fast! See Performance Testing
The Name
It's play on words: gobetween ("go between").
Also, it's written in Go, and it's a proxy so it's something that stays between 2 parties 😄
License
MIT. See LICENSE file for more details.
Authors & Maintainers
All Contributors
- Join gobetween Telegram group here.
Logo
Logo by Max Demchenko