louailink

What is LouAILink

A reverse proxy like nginx, built on pingora, simple and efficient.

LouAILink：这里"Lou"可以是"low"（低延迟）的谐音，"AI"代表人工智能，"Link"表示连接。整个名称强调了低延迟的AI连接网关

Feature

Filter location by host and path
Path rewrite with regexp
HTTP 1/2 end to end proxy
multi base configuration, file or etcd storage
Graceful reload and auto restart after the configuration is changed
Template for http access log
Admin Web UI configuration
Generate TLS certificates from let's encrypt
Notification events: lets_encrypt, backend_unhealthy, diff_config, restart, etc.
Http proxy plugins: compression, static serve, limit, stats, mock, etc.

Start

Loads all configurations from $HOME/.louailink and run in the background. Log appends to $HOME/.louailink/louailink.log.

RUST_LOG=INFO louailink -c=$HOME/.louailink -d --log=$HOME/.louailink/louailink.log

Graceful restart

Validate the configurations, send quit signal to louailink, then start a new process to handle all requests.

RUST_LOG=INFO louailink -c=$HOME/.louailink -t \
  && pkill -SIGQUIT louailink \
  && RUST_LOG=INFO louailink -c=$HOME/.louailink -d -u --log=$HOME/.louailink/louailink.log

Auto restart

Watch the configurations, if one of them changes, graceful restart louailink.

RUST_LOG=INFO louailink -c=$HOME/.louailink \
  && -a -d --log=$HOME/.louailink/louailink.log

Dev

# generate admin web asset
make build-web
make dev

Config

All toml configurations are as follows louailink.toml. All yaml configurations are as follows louailink.yaml.

Proxy step

graph TD;
    server["HTTP Server"];
    locationA["Location A"];
    locationB["Location B"];
    locationPluginListA["Proxy Plugin List A"];
    locationPluginListB["Proxy Plugin List B"];
    upstreamA1["Upstream A1"];
    upstreamA2["Upstream A2"];
    upstreamB1["Upstream B1"];
    upstreamB2["Upstream B2"];
    locationResponsePluginListA["Response Plugin List A"];
    locationResponsePluginListB["Response Plugin List B"];

    start("New Request") --> server

    server -- "host:HostA, Path:/api/*" --> locationA

    server -- "Path:/rest/*"--> locationB

    locationA -- "Exec Proxy Plugins" --> locationPluginListA

    locationB -- "Exec Proxy Plugins" --> locationPluginListB

    locationPluginListA -- "proxy pass: 10.0.0.1:8001" --> upstreamA1

    locationPluginListA -- "proxy pass: 10.0.0.2:8001" --> upstreamA2

    locationPluginListA -- "done" --> response

    locationPluginListB -- "proxy pass: 10.0.0.1:8002" --> upstreamB1

    locationPluginListB -- "proxy pass: 10.0.0.2:8002" --> upstreamB2

    locationPluginListB -- "done" --> response

    upstreamA1 -- "Exec Response Plugins" --> locationResponsePluginListA
    upstreamA2 -- "Exec Response Plugins" --> locationResponsePluginListA

    upstreamB1 -- "Exec Response Plugins" --> locationResponsePluginListB
    upstreamB2 -- "Exec Response Plugins" --> locationResponsePluginListB

    locationResponsePluginListA --> response
    locationResponsePluginListB --> response

    response["HTTP Response"] --> stop("Logging");

louloulin/louailink