/
gateway.go
97 lines (83 loc) · 4.23 KB
/
gateway.go
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package gateway
import (
"net/http"
"github.com/cortexproject/cortex/pkg/util/log"
klog "github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/weaveworks/common/server"
)
// Gateway hosts a reverse proxy for each upstream cortex service we'd like to tunnel after successful authentication
type Gateway struct {
cfg Config
distributorProxy *Proxy
queryFrontendProxy *Proxy
rulerProxy *Proxy
alertManagerProxy *Proxy
server *server.Server
}
// New instantiates a new Gateway
func New(cfg Config, svr *server.Server) (*Gateway, error) {
// Initialize reverse proxy for each upstream target service
distributor, err := newProxy(cfg.DistributorAddress, "distributor")
if err != nil {
return nil, err
}
queryFrontend, err := newProxy(cfg.QueryFrontendAddress, "query-frontend")
if err != nil {
return nil, err
}
ruler, err := newProxy(cfg.RulerAddress, "ruler")
if err != nil {
return nil, err
}
alertManager, err := newProxy(cfg.AlertManagerAddress, "ruler")
if err != nil {
return nil, err
}
return &Gateway{
cfg: cfg,
distributorProxy: distributor,
queryFrontendProxy: queryFrontend,
rulerProxy: ruler,
alertManagerProxy: alertManager,
server: svr,
}, nil
}
// Start initializes the Gateway and starts it
func (g *Gateway) Start() {
g.registerRoutes()
}
// RegisterRoutes binds all to be piped routes to their handlers
func (g *Gateway) registerRoutes() {
authenticateTenant := newAuthenticationMiddleware(g.cfg)
g.server.HTTP.Path("/all_user_stats").HandlerFunc(g.distributorProxy.Handler)
g.server.HTTP.Path("/api/prom/push").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.distributorProxy.Handler)))
g.server.HTTP.Path("/api/v1/push").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.distributorProxy.Handler)))
g.server.HTTP.PathPrefix("/prometheus/api/v1/alerts").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.rulerProxy.Handler)))
g.server.HTTP.PathPrefix("/prometheus/api/v1/rules").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.rulerProxy.Handler)))
g.server.HTTP.PathPrefix("/prometheus/config/v1/rules").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.rulerProxy.Handler)))
g.server.HTTP.PathPrefix("/api/prom/api/v1/alerts").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.rulerProxy.Handler)))
g.server.HTTP.PathPrefix("/api/prom/api/v1/rules").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.rulerProxy.Handler)))
g.server.HTTP.PathPrefix("/api/v1/rules").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.rulerProxy.Handler)))
g.server.HTTP.PathPrefix("/api/prom/rules").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.rulerProxy.Handler)))
g.server.HTTP.PathPrefix("/prometheus/api").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.queryFrontendProxy.Handler)))
g.server.HTTP.PathPrefix("/api/v1/user_stats").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.queryFrontendProxy.Handler)))
g.server.HTTP.PathPrefix("/api/v1/alerts").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.alertManagerProxy.Handler)))
g.server.HTTP.PathPrefix("/alertmanager").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.alertManagerProxy.Handler)))
g.server.HTTP.PathPrefix("/multitenant_alertmanager/status").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.alertManagerProxy.Handler)))
g.server.HTTP.PathPrefix("/api/v1/alerts").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.alertManagerProxy.Handler)))
g.server.HTTP.PathPrefix("/api/prom/alertmanager").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.alertManagerProxy.Handler)))
g.server.HTTP.PathPrefix("/api").Handler(authenticateTenant.Wrap(http.HandlerFunc(g.queryFrontendProxy.Handler)))
g.server.HTTP.Path("/health").HandlerFunc(g.healthCheck)
g.server.HTTP.PathPrefix("/").HandlerFunc(g.notFoundHandler)
}
func (g *Gateway) healthCheck(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Write([]byte("Ok"))
}
func (g *Gateway) notFoundHandler(w http.ResponseWriter, r *http.Request) {
logger := klog.With(log.WithContext(r.Context(), log.Logger), "ip_address", r.RemoteAddr)
level.Info(logger).Log("msg", "no request handler defined for this route", "route", r.RequestURI)
w.WriteHeader(404)
w.Write([]byte("404 - Resource not found"))
}