129 lines
3.6 KiB
Go
129 lines
3.6 KiB
Go
// Copyright 2017 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package api
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import (
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"crypto/tls"
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"crypto/x509"
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"io/ioutil"
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"net"
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"net/http"
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"strconv"
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"time"
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log "github.com/sirupsen/logrus"
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"github.com/tylerb/graceful"
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"github.com/coreos/clair/api/v3"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/pkg/stopper"
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)
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const timeoutResponse = `{"Error":{"Message":"Clair failed to respond within the configured timeout window.","Type":"Timeout"}}`
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// Config is the configuration for the API service.
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type Config struct {
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GrpcPort int
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HealthPort int
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Timeout time.Duration
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CertFile, KeyFile, CAFile string
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}
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func RunV2(cfg *Config, store database.Datastore) {
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tlsConfig, err := tlsClientConfig(cfg.CAFile)
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if err != nil {
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log.WithError(err).Fatal("could not initialize client cert authentication")
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}
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if tlsConfig != nil {
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log.Info("main API configured with client certificate authentication")
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}
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v3.Run(cfg.GrpcPort, tlsConfig, cfg.CertFile, cfg.KeyFile, store)
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}
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func RunHealth(cfg *Config, store database.Datastore, st *stopper.Stopper) {
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defer st.End()
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// Do not run the API service if there is no config.
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if cfg == nil {
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log.Info("health API service is disabled.")
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return
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}
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log.WithField("port", cfg.HealthPort).Info("starting health API")
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srv := &graceful.Server{
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Timeout: 10 * time.Second, // Interrupt health checks when stopping
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NoSignalHandling: true, // We want to use our own Stopper
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Server: &http.Server{
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Addr: ":" + strconv.Itoa(cfg.HealthPort),
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Handler: http.TimeoutHandler(newHealthHandler(store), cfg.Timeout, timeoutResponse),
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},
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}
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listenAndServeWithStopper(srv, st, "", "")
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log.Info("health API stopped")
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}
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// listenAndServeWithStopper wraps graceful.Server's
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// ListenAndServe/ListenAndServeTLS and adds the ability to interrupt them with
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// the provided stopper.Stopper.
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func listenAndServeWithStopper(srv *graceful.Server, st *stopper.Stopper, certFile, keyFile string) {
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go func() {
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<-st.Chan()
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srv.Stop(0)
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}()
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var err error
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if certFile != "" && keyFile != "" {
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log.Info("API: TLS Enabled")
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err = srv.ListenAndServeTLS(certFile, keyFile)
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} else {
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err = srv.ListenAndServe()
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}
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if err != nil {
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if opErr, ok := err.(*net.OpError); !ok || (ok && opErr.Op != "accept") {
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log.Fatal(err)
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}
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}
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}
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// tlsClientConfig initializes a *tls.Config using the given CA. The resulting
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// *tls.Config is meant to be used to configure an HTTP server to do client
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// certificate authentication.
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//
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// If no CA is given, a nil *tls.Config is returned; no client certificate will
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// be required and verified. In other words, authentication will be disabled.
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func tlsClientConfig(caPath string) (*tls.Config, error) {
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if caPath == "" {
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return nil, nil
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}
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caCert, err := ioutil.ReadFile(caPath)
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if err != nil {
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return nil, err
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}
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caCertPool := x509.NewCertPool()
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caCertPool.AppendCertsFromPEM(caCert)
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tlsConfig := &tls.Config{
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ClientCAs: caCertPool,
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ClientAuth: tls.RequireAndVerifyClientCert,
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}
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return tlsConfig, nil
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}
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