all: remove packet arm64 machines

linux-arm64-packet builder machine is getting decommissioned on
27/06/22. This CL removes the build machine before the decommission.

Fixes golang/go#53436

Change-Id: I9992481bddc3376d86ec0d69d8e7da0157333adf
Reviewed-on: https://go-review.googlesource.com/c/build/+/413154
Run-TryBot: Carlos Amedee <carlos@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Carlos Amedee <carlos@golang.org>

cmd/buildlet/stage0/stage0.go

@@ -85,7 +85,7 @@ func main() {
 		}
 	case "linux/arm64":
 		switch env := os.Getenv("GO_BUILDER_ENV"); env {
-		case "host-linux-arm64-packet", "host-linux-arm64-aws":
+		case "host-linux-arm64-aws":
 			// No special setup.
 		default:
 			panic(fmt.Sprintf("unknown/unspecified $GO_BUILDER_ENV value %q", env))
@@ -182,16 +182,6 @@ Download:
 		cmd.Args = append(cmd.Args, reverseHostTypeArgs("host-linux-s390x")...)
 	case "linux/arm64":
 		switch buildEnv {
-		case "host-linux-arm64-packet":
-			hostname := os.Getenv("HOSTNAME") // if empty, docker container name is used
-			cmd.Args = append(cmd.Args,
-				"--reverse-type="+buildEnv,
-				"--workdir=/workdir",
-				"--hostname="+hostname,
-				"--halt=false",
-				"--reboot=false",
-				"--coordinator=farmer.golang.org:443",
-			)
 		case "host-linux-arm64-aws":
 			// no special configuration
 		default:

cmd/coordinator/status.go

@@ -149,7 +149,6 @@ var basePinErr atomic.Value
 func addHealthCheckers(ctx context.Context, sc *secret.Client) {
 	addHealthChecker(newMacHealthChecker())
 	addHealthChecker(newMacOSARM64Checker())
-	addHealthChecker(newPacketHealthChecker())
 	addHealthChecker(newOSUPPC64Checker())
 	addHealthChecker(newOSUPPC64leChecker())
 	addHealthChecker(newOSUPPC64lePower9Checker())
@@ -399,20 +398,6 @@ func expectedHosts(hostType string) int {
 	return hc.ExpectNum
 }
 
-func newPacketHealthChecker() *healthChecker {
-	var hosts []string
-	for i := 1; i <= expectedHosts("host-linux-arm64-packet"); i++ {
-		name := fmt.Sprintf("packet%02d", i)
-		hosts = append(hosts, name)
-	}
-	return &healthChecker{
-		ID:     "packet",
-		Title:  "Packet linux/arm64 machines",
-		DocURL: "https://github.com/golang/build/tree/master/env/linux-arm64/packet",
-		Check:  reverseHostChecker(hosts),
-	}
-}
-
 func newOSUPPC64Checker() *healthChecker {
 	var hosts []string
 	for i := 1; i <= expectedHosts("host-linux-ppc64-osu"); i++ {

dashboard/builders.go

@@ -564,14 +564,6 @@ var Hosts = map[string]*HostConfig{
 		SSHUsername:     "root",
 		HermeticReverse: true,
 	},
-	"host-linux-arm64-packet": &HostConfig{
-		Notes:           "On 96 core packet.net host (Xenial) in Docker containers (Debian Buster); run by Go team. See x/build/env/linux-arm64/packet",
-		IsReverse:       true,
-		HermeticReverse: true,
-		ExpectNum:       8,
-		env:             []string{"GOROOT_BOOTSTRAP=/usr/local/go-bootstrap"},
-		SSHUsername:     "root",
-	},
 	"host-linux-arm64-aws": &HostConfig{
 		Notes:           "Debian Buster, EC2 arm64 instance. See x/build/env/linux-arm64/aws",
 		VMImage:         "ami-03089323a1d38e652",
@@ -2528,11 +2520,6 @@ func init() {
 		distTestAdjust: ppc64DistTestPolicy,
 		env:            []string{"GO_TEST_TIMEOUT_SCALE=2"}, // see golang.org/issues/44422
 	})
-	addBuilder(BuildConfig{
-		Name:     "linux-arm64-packet",
-		HostType: "host-linux-arm64-packet",
-		FlakyNet: true, // maybe not flaky, but here conservatively
-	})
 	addBuilder(BuildConfig{
 		Name:              "linux-arm64-aws",
 		HostType:          "host-linux-arm64-aws",