/
xds.go
97 lines (83 loc) · 3.1 KB
/
xds.go
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package controlplane
import (
"context"
"encoding/hex"
"fmt"
envoy_service_discovery_v3 "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
"golang.org/x/sync/errgroup"
"github.com/pomerium/pomerium/internal/log"
"github.com/pomerium/pomerium/internal/telemetry/trace"
"github.com/pomerium/pomerium/pkg/cryptutil"
"github.com/pomerium/pomerium/pkg/protoutil"
)
const (
clusterTypeURL = "type.googleapis.com/envoy.config.cluster.v3.Cluster"
listenerTypeURL = "type.googleapis.com/envoy.config.listener.v3.Listener"
routeConfigurationTypeURL = "type.googleapis.com/envoy.config.route.v3.RouteConfiguration"
)
func (srv *Server) buildDiscoveryResources(ctx context.Context) (map[string][]*envoy_service_discovery_v3.Resource, error) {
ctx, span := trace.StartSpan(ctx, "controlplane.Server.buildDiscoveryResources")
defer span.End()
cfg := srv.currentConfig.Load()
log.Info(ctx).Msg("controlplane: building discovery resources")
eg, ctx := errgroup.WithContext(ctx)
var clusterResources []*envoy_service_discovery_v3.Resource
eg.Go(func() error {
clusters, err := srv.Builder.BuildClusters(ctx, cfg)
if err != nil {
return fmt.Errorf("error building clusters: %w", err)
}
for _, cluster := range clusters {
clusterResources = append(clusterResources, &envoy_service_discovery_v3.Resource{
Name: cluster.Name,
Version: hex.EncodeToString(cryptutil.HashProto(cluster)),
Resource: protoutil.NewAny(cluster),
})
}
return nil
})
var listenerResources []*envoy_service_discovery_v3.Resource
eg.Go(func() error {
listeners, err := srv.Builder.BuildListeners(ctx, cfg, false)
if err != nil {
return fmt.Errorf("error building listeners: %w", err)
}
for _, listener := range listeners {
listenerResources = append(listenerResources, &envoy_service_discovery_v3.Resource{
Name: listener.Name,
Version: hex.EncodeToString(cryptutil.HashProto(listener)),
Resource: protoutil.NewAny(listener),
})
}
return nil
})
var routeConfigurationResources []*envoy_service_discovery_v3.Resource
eg.Go(func() error {
routeConfigurations, err := srv.Builder.BuildRouteConfigurations(ctx, cfg)
if err != nil {
return fmt.Errorf("error building route configurations: %w", err)
}
for _, routeConfiguration := range routeConfigurations {
routeConfigurationResources = append(routeConfigurationResources, &envoy_service_discovery_v3.Resource{
Name: routeConfiguration.Name,
Version: hex.EncodeToString(cryptutil.HashProto(routeConfiguration)),
Resource: protoutil.NewAny(routeConfiguration),
})
}
return nil
})
err := eg.Wait()
if err != nil {
return nil, err
}
log.Info(ctx).
Int("cluster-count", len(clusterResources)).
Int("listener-count", len(listenerResources)).
Int("route-configuration-count", len(routeConfigurationResources)).
Msg("controlplane: built discovery resources")
return map[string][]*envoy_service_discovery_v3.Resource{
clusterTypeURL: clusterResources,
listenerTypeURL: listenerResources,
routeConfigurationTypeURL: routeConfigurationResources,
}, nil
}