pass agent hostname to server and persist

cmd/drone-agent/agent.go

@@ -6,11 +6,13 @@ import (
 	"io"
 	"io/ioutil"
 	"log"
+	"os"
 	"strconv"
 	"sync"
 	"time"
 
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
 
 	"github.com/cncd/pipeline/pipeline"
 	"github.com/cncd/pipeline/pipeline/backend"
@@ -31,6 +33,11 @@ func loop(c *cli.Context) error {
 		},
 	}
 
+	hostname := c.String("hostname")
+	if len(hostname) == 0 {
+		hostname, _ = os.Hostname()
+	}
+
 	// TODO pass version information to grpc server
 	// TODO authenticate to grpc server
 
@@ -44,6 +51,7 @@ func loop(c *cli.Context) error {
 			password: c.String("password"),
 		}),
 	)
+
 	if err != nil {
 		return err
 	}
@@ -52,7 +60,10 @@ func loop(c *cli.Context) error {
 	client := rpc.NewGrpcClient(conn)
 
 	sigterm := abool.New()
-	ctx := context.Background()
+	ctx := metadata.NewOutgoingContext(
+		context.Background(),
+		metadata.Pairs("hostname", hostname),
+	)
 	ctx = interrupt.WithContextFunc(ctx, func() {
 		println("ctrl+c received, terminating process")
 		sigterm.Set()

cmd/drone-agent/main.go

@@ -39,6 +39,10 @@ func main() {
 			Name:   "debug",
 			Usage:  "start the agent in debug mode",
 		},
+		cli.StringFlag{
+			EnvVar: "DRONE_HOSTNAME,HOSTNAME",
+			Name:   "hostname",
+		},
 		cli.StringFlag{
 			EnvVar: "DRONE_PLATFORM",
 			Name:   "platform",

server/rpc.go

@@ -10,6 +10,8 @@ import (
 
 	oldcontext "golang.org/x/net/context"
 
+	"google.golang.org/grpc/metadata"
+
 	"github.com/Sirupsen/logrus"
 	"github.com/cncd/logging"
 	"github.com/cncd/pipeline/pipeline/rpc"
@@ -207,6 +209,14 @@ func (s *RPC) Upload(c context.Context, id string, file *rpc.File) error {
 		return err
 	}
 
+	metadata, ok := metadata.FromContext(c)
+	if ok {
+		hostname, ok := metadata["hostname"]
+		if ok && len(hostname) != 0 {
+			proc.Machine = hostname[0]
+		}
+	}
+
 	if file.Mime == "application/json+logs" {
 		return s.store.LogSave(
 			proc,
@@ -238,6 +248,13 @@ func (s *RPC) Init(c context.Context, id string, state rpc.State) error {
 		log.Printf("error: cannot find proc with id %d: %s", procID, err)
 		return err
 	}
+	metadata, ok := metadata.FromContext(c)
+	if ok {
+		hostname, ok := metadata["hostname"]
+		if ok && len(hostname) != 0 {
+			proc.Machine = hostname[0]
+		}
+	}
 
 	build, err := s.store.GetBuild(proc.BuildID)
 	if err != nil {