| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // gcsproxy is an artifact server backed by GCS and can run in either retrieval |
| // (read) or staging (write) mode. |
| package main |
| |
| import ( |
| "context" |
| "flag" |
| "log" |
| "net" |
| |
| "github.com/apache/beam/sdks/go/pkg/beam/artifact/gcsproxy" |
| pb "github.com/apache/beam/sdks/go/pkg/beam/model/jobmanagement_v1" |
| "google.golang.org/grpc" |
| ) |
| |
| const ( |
| retrieve = "retrieve" |
| stage = "stage" |
| ) |
| |
| var ( |
| mode = flag.String("mode", retrieve, "Proxy mode: retrieve or stage.") |
| endpoint = flag.String("endpoint", "", "Server endpoint to expose.") |
| manifest = flag.String("manifest", "", "Location of proxy manifest.") |
| ) |
| |
| func main() { |
| flag.Parse() |
| if *manifest == "" { |
| log.Fatal("No proxy manifest location provided. Use --manifest=gs://foo/bar") |
| } |
| if *endpoint == "" { |
| log.Fatal("No endpoint provided. Use --endpoint=localhost:12345") |
| } |
| |
| gs := grpc.NewServer() |
| |
| switch *mode { |
| case retrieve: |
| // Retrieval mode. We download the manifest -- but not the |
| // artifacts -- eagerly. |
| |
| log.Printf("Starting retrieval proxy from %v on %v", *manifest, *endpoint) |
| |
| md, err := gcsproxy.ReadProxyManifest(context.Background(), *manifest) |
| if err != nil { |
| log.Fatalf("Failed to obtain proxy manifest %v: %v", *manifest, err) |
| } |
| proxy, err := gcsproxy.NewRetrievalServer(md) |
| if err != nil { |
| log.Fatalf("Failed to create artifact server: %v", err) |
| } |
| pb.RegisterArtifactRetrievalServiceServer(gs, proxy) |
| |
| case stage: |
| // Staging proxy. We update the blobs next to the manifest |
| // in a blobs "directory". |
| |
| log.Printf("Starting staging proxy to %v on %v", *manifest, *endpoint) |
| |
| proxy, err := gcsproxy.NewStagingServer(*manifest) |
| if err != nil { |
| log.Fatalf("Failed to create artifact server: %v", err) |
| } |
| pb.RegisterArtifactStagingServiceServer(gs, proxy) |
| |
| default: |
| log.Fatalf("Invalid mode: '%v', want '%v' or '%v'", *mode, retrieve, stage) |
| } |
| |
| listener, err := net.Listen("tcp", *endpoint) |
| if err != nil { |
| log.Fatalf("Failed to listen to %v: %v", *endpoint, err) |
| } |
| log.Fatalf("Server failed: %v", gs.Serve(listener)) |
| } |