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server.go
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server.go
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package server
import (
"fmt"
"os"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/cred_helper"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/db"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/healthendpoint"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/metricsforwarder/config"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/metricsforwarder/forwarder"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/metricsforwarder/server/auth"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/metricsforwarder/server/common"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/ratelimiter"
"code.cloudfoundry.org/app-autoscaler/src/autoscaler/routes"
"code.cloudfoundry.org/lager"
"github.com/patrickmn/go-cache"
"github.com/tedsuo/ifrit"
"github.com/tedsuo/ifrit/http_server"
)
func NewServer(logger lager.Logger, conf *config.Config, policyDB db.PolicyDB, credentials cred_helper.Credentials, allowedMetricCache cache.Cache, httpStatusCollector healthendpoint.HTTPStatusCollector, rateLimiter ratelimiter.Limiter) (ifrit.Runner, error) {
metricForwarder, err := forwarder.NewMetricForwarder(logger, conf)
if err != nil {
logger.Error("failed-to-create-metricforwarder-server", err)
os.Exit(1)
}
mh := NewCustomMetricsHandler(logger, metricForwarder, policyDB, allowedMetricCache)
authenticator, err := auth.New(logger, credentials)
if err != nil {
return nil, fmt.Errorf("failed to add auth middleware: %w", err)
}
httpStatusCollectMiddleware := healthendpoint.NewHTTPStatusCollectMiddleware(httpStatusCollector)
rateLimiterMiddleware := ratelimiter.NewRateLimiterMiddleware("appid", rateLimiter, logger.Session("metricforwarder-ratelimiter-middleware"))
r := routes.MetricsForwarderRoutes()
r.Use(rateLimiterMiddleware.CheckRateLimit)
r.Use(httpStatusCollectMiddleware.Collect)
r.Use(authenticator.Authenticate)
r.Get(routes.PostCustomMetricsRouteName).Handler(common.VarsFunc(mh.VerifyCredentialsAndPublishMetrics))
var addr string
if os.Getenv("APP_AUTOSCALER_TEST_RUN") == "true" {
addr = fmt.Sprintf("localhost:%d", conf.Server.Port)
} else {
addr = fmt.Sprintf("0.0.0.0:%d", conf.Server.Port)
}
runner := http_server.New(addr, r)
logger.Info("metrics-forwarder-http-server-created", lager.Data{"config": conf})
return runner, nil
}