nginx-lua-conf-example

# Lua Prometheus collecter and exporter

lua_shared_dict prometheus_metrics 200M;
lua_package_path "{{nginx_lua_prometheus_path}}/?.lua";
init_by_lua '
  prometheus = require("prometheus").init("prometheus_metrics")
  metric_requests = prometheus:counter(
    "nginx_http_requests_total", "Number of HTTP requests", {"host", "app","status", "uri", "method"})
  metric_latency = prometheus:histogram(
    "nginx_http_request_duration_seconds", "HTTP request latency", {"host", "app","status", "uri", "method"})
';
log_by_lua '
  local host = ngx.var.host:gsub("^www.", "")
  metric_requests:inc(1, {host, ngx.var.app, ngx.var.status, ngx.var.uri, ngx.var.request_method})
  metric_latency:observe(ngx.now() - ngx.req.start_time(), {host, ngx.var.app, ngx.var.status, ngx.var.uri, ngx.var.request_method})
';