feat: add support for Spot VMs and validation for provisioning options

cli/cmd/bootstrap_gcp.go

@@ -69,6 +69,7 @@ func AddBootstrapGcpCmd(parent *cobra.Command, opts *GlobalOptions) {
 	flags.StringVar(&bootstrapGcpCmd.CodesphereEnv.SSHPublicKeyPath, "ssh-public-key-path", "~/.ssh/id_rsa.pub", "SSH Public Key Path (default: ~/.ssh/id_rsa.pub)")
 	flags.StringVar(&bootstrapGcpCmd.CodesphereEnv.SSHPrivateKeyPath, "ssh-private-key-path", "~/.ssh/id_rsa", "SSH Private Key Path (default: ~/.ssh/id_rsa)")
 	flags.BoolVar(&bootstrapGcpCmd.CodesphereEnv.Preemptible, "preemptible", false, "Use preemptible VMs for Codesphere infrastructure (default: false)")
+	flags.BoolVar(&bootstrapGcpCmd.CodesphereEnv.Spot, "spot", false, "Use Spot VMs for Codesphere infrastructure. Falls back to standard VMs if spot capacity unavailable (default: false)")
 	flags.IntVar(&bootstrapGcpCmd.CodesphereEnv.DatacenterID, "datacenter-id", 1, "Datacenter ID (default: 1)")
 	flags.StringVar(&bootstrapGcpCmd.CodesphereEnv.CustomPgIP, "custom-pg-ip", "", "Custom PostgreSQL IP (optional)")
 	flags.StringVar(&bootstrapGcpCmd.CodesphereEnv.InstallConfigPath, "install-config", "config.yaml", "Path to install config file (optional)")

docs/oms_beta_bootstrap-gcp.md

@@ -47,6 +47,7 @@ oms beta bootstrap-gcp [flags]
       --registry-user string              Custom Registry username (only for GitHub registry type) (optional)
       --secrets-dir string                Directory for secrets (default: /etc/codesphere/secrets) (default "/etc/codesphere/secrets")
       --secrets-file string               Path to secrets files (optional) (default "prod.vault.yaml")
+      --spot                              Use Spot VMs for Codesphere infrastructure. Falls back to standard VMs if spot capacity unavailable (default: false)
       --ssh-private-key-path string       SSH Private Key Path (default: ~/.ssh/id_rsa) (default "~/.ssh/id_rsa")
       --ssh-public-key-path string        SSH Public Key Path (default: ~/.ssh/id_rsa.pub) (default "~/.ssh/id_rsa.pub")
       --ssh-quiet                         Suppress SSH command output (default: true) (default true)

internal/bootstrap/gcp/gcp.go

@@ -93,6 +93,7 @@ type CodesphereEnvironment struct {
 	InstallHash          string       `json:"install_hash"`
 	InstallSkipSteps     []string     `json:"install_skip_steps"`
 	Preemptible          bool         `json:"preemptible"`
+	Spot                 bool         `json:"spot"`
 	WriteConfig          bool         `json:"-"`
 	GatewayIP            string       `json:"gateway_ip"`
 	PublicGatewayIP      string       `json:"public_gateway_ip"`
@@ -306,9 +307,22 @@ func (b *GCPBootstrapper) ValidateInput() error {
 		return err
 	}
 
+	err = b.validateVMProvisioningOptions()
+	if err != nil {
+		return err
+	}
+
 	return b.validateGithubParams()
 }
 
+// validateVMProvisioningOptions checks that spot and preemptible options are not both set
+func (b *GCPBootstrapper) validateVMProvisioningOptions() error {
+	if b.Env.Spot && b.Env.Preemptible {
+		return fmt.Errorf("cannot specify both --spot and --preemptible flags; use --spot for the newer spot VM model")
+	}
+	return nil
+}
+
 // validateInstallVersion checks if the specified install version exists and contains the required installer artifact
 func (b *GCPBootstrapper) validateInstallVersion() error {
 	if b.Env.InstallLocal != "" {
@@ -686,6 +700,7 @@ func (b *GCPBootstrapper) EnsureComputeInstances() error {
 	wg := sync.WaitGroup{}
 	errCh := make(chan error, len(vmDefs))
 	resultCh := make(chan vmResult, len(vmDefs))
+	logCh := make(chan string, len(vmDefs))
 	rootDiskSize := int64(200)
 	if b.Env.RegistryType == RegistryTypeGitHub {
 		rootDiskSize = 50
@@ -694,6 +709,47 @@ func (b *GCPBootstrapper) EnsureComputeInstances() error {
 		wg.Add(1)
 		go func(vm VMDef) {
 			defer wg.Done()
+
+			existingInstance, err := b.GCPClient.GetInstance(projectID, zone, vm.Name)
+			if err != nil {
+				if !isNotFoundError(err) {
+					errCh <- fmt.Errorf("failed to get instance %s: %w", vm.Name, err)
+					return
+				}
+			}
+			if existingInstance != nil {
+				instanceStatus := existingInstance.GetStatus()
+				if instanceStatus == "TERMINATED" || instanceStatus == "STOPPED" || instanceStatus == "SUSPENDED" {
+					// Start the stopped instance
+					err = b.GCPClient.StartInstance(projectID, zone, vm.Name)
+					if err != nil {
+						errCh <- fmt.Errorf("failed to start stopped instance %s: %w", vm.Name, err)
+						return
+					}
+				}
+
+				// Wait until the instance is RUNNING and IPs are populated.
+				readyInstance, err := b.waitForInstanceRunning(projectID, zone, vm.Name, vm.ExternalIP)
+				if err != nil {
+					errCh <- fmt.Errorf("instance %s did not become ready: %w", vm.Name, err)
+					return
+				}
+
+				externalIP := ""
+				internalIP := readyInstance.GetNetworkInterfaces()[0].GetNetworkIP()
+				if len(readyInstance.GetNetworkInterfaces()[0].GetAccessConfigs()) > 0 {
+					externalIP = readyInstance.GetNetworkInterfaces()[0].GetAccessConfigs()[0].GetNatIP()
+				}
+				resultCh <- vmResult{
+					vmType:     vm.Tags[0],
+					name:       vm.Name,
+					externalIP: externalIP,
+					internalIP: internalIP,
+				}
+				return
+			}
+
+			// Instance doesn't exist, create it
 			disks := []*computepb.AttachedDisk{
 				{
 					Boot:       protoBool(true),
@@ -737,9 +793,7 @@ func (b *GCPBootstrapper) EnsureComputeInstances() error {
 				Tags: &computepb.Tags{
 					Items: vm.Tags,
 				},
-				Scheduling: &computepb.Scheduling{
-					Preemptible: &b.Env.Preemptible,
-				},
+				Scheduling: b.buildSchedulingConfig(),
 				NetworkInterfaces: []*computepb.NetworkInterface{
 					{
 						Network:    protoString(network),
@@ -767,9 +821,9 @@ func (b *GCPBootstrapper) EnsureComputeInstances() error {
 				}
 			}
 
-			err = b.GCPClient.CreateInstance(projectID, zone, instance)
-			if err != nil && !isAlreadyExistsError(err) {
-				errCh <- fmt.Errorf("failed to create instance %s: %w", vm.Name, err)
+			err = b.createInstanceWithFallback(projectID, zone, instance, vm.Name, logCh)
+			if err != nil {
+				errCh <- err
 				return
 			}
 
@@ -802,6 +856,11 @@ func (b *GCPBootstrapper) EnsureComputeInstances() error {
 
 	close(errCh)
 	close(resultCh)
+	close(logCh)
+
+	for msg := range logCh {
+		b.stlog.Logf("%s", msg)
+	}
 
 	var errs []error
 	for err := range errCh {
@@ -843,6 +902,93 @@ func (b *GCPBootstrapper) EnsureComputeInstances() error {
 	return nil
 }
 
+// buildSchedulingConfig creates the scheduling configuration based on spot/preemptible settings
+func (b *GCPBootstrapper) buildSchedulingConfig() *computepb.Scheduling {
+	if b.Env.Spot {
+		return &computepb.Scheduling{
+			ProvisioningModel:         protoString("SPOT"),
+			OnHostMaintenance:         protoString("TERMINATE"),
+			AutomaticRestart:          protoBool(false),
+			InstanceTerminationAction: protoString("STOP"),
+		}
+	}
+	if b.Env.Preemptible {
+		return &computepb.Scheduling{
+			Preemptible: protoBool(true),
+		}
+	}
+
+	return &computepb.Scheduling{}
+}
+
+// createInstanceWithFallback attempts to create an instance with the configured settings.
+// If spot VMs are enabled and creation fails due to capacity issues, it falls back to standard VMs.
+func (b *GCPBootstrapper) createInstanceWithFallback(projectID, zone string, instance *computepb.Instance, vmName string, logCh chan<- string) error {
+	err := b.GCPClient.CreateInstance(projectID, zone, instance)
+	if err == nil {
+		return nil
+	}
+
+	if isAlreadyExistsError(err) {
+		return nil
+	}
+
+	if b.Env.Spot && isSpotCapacityError(err) {
+		logCh <- fmt.Sprintf("Spot capacity unavailable for %s, falling back to standard VM", vmName)
+		instance.Scheduling = &computepb.Scheduling{}
+		err = b.GCPClient.CreateInstance(projectID, zone, instance)
+		if err != nil && !isAlreadyExistsError(err) {
+			return fmt.Errorf("failed to create instance %s (fallback to standard VM): %w", vmName, err)
+		}
+		return nil
+	}
+
+	return fmt.Errorf("failed to create instance %s: %w", vmName, err)
+}
+
+// waitForInstanceRunning polls GetInstance until the instance status is RUNNING
+// and its internal IP (and external IP, when needsExternalIP is true) are populated.
+// It returns the ready instance or an error if the deadline is exceeded.
+func (b *GCPBootstrapper) waitForInstanceRunning(projectID, zone, name string, needsExternalIP bool) (*computepb.Instance, error) {
+	const (
+		maxAttempts  = 60
+		pollInterval = 5 * time.Second
+	)
+	for attempt := range maxAttempts {
+		inst, err := b.GCPClient.GetInstance(projectID, zone, name)
+		if err != nil {
+			return nil, fmt.Errorf("failed to poll instance %s: %w", name, err)
+		}
+
+		if inst.GetStatus() == "RUNNING" &&
+			len(inst.GetNetworkInterfaces()) > 0 &&
+			inst.GetNetworkInterfaces()[0].GetNetworkIP() != "" &&
+			(!needsExternalIP || (len(inst.GetNetworkInterfaces()[0].GetAccessConfigs()) > 0 &&
+				inst.GetNetworkInterfaces()[0].GetAccessConfigs()[0].GetNatIP() != "")) {
+			return inst, nil
+		}
+
+		if attempt < maxAttempts-1 {
+			time.Sleep(pollInterval)
+		}
+	}
+	return nil, fmt.Errorf("timed out waiting for instance %s to be RUNNING with IPs assigned after %s",
+		name, time.Duration(maxAttempts)*pollInterval)
+}
+
+// isSpotCapacityError checks if the error is related to spot VM capacity issues
+func isSpotCapacityError(err error) bool {
+	if err == nil {
+		return false
+	}
+	errStr := err.Error()
+	return strings.Contains(errStr, "ZONE_RESOURCE_POOL_EXHAUSTED") ||
+		strings.Contains(errStr, "UNSUPPORTED_OPERATION") ||
+		strings.Contains(errStr, "stockout") ||
+		strings.Contains(errStr, "does not have enough resources") ||
+		status.Code(err) == codes.ResourceExhausted
+}
+
 // EnsureGatewayIPAddresses reserves 2 static external IP addresses for the ingress
 // controllers of the cluster.
 func (b *GCPBootstrapper) EnsureGatewayIPAddresses() error {
@@ -1591,6 +1737,10 @@ func isAlreadyExistsError(err error) bool {
 	return status.Code(err) == codes.AlreadyExists || strings.Contains(err.Error(), "already exists")
 }
 
+func isNotFoundError(err error) bool {
+	return status.Code(err) == codes.NotFound || strings.Contains(err.Error(), "not found")
+}
+
 // readSSHKey reads an SSH key file, expanding ~ in the path
 func (b *GCPBootstrapper) readSSHKey(path string) (string, error) {
 	realPath := util.ExpandPath(path)

internal/bootstrap/gcp/gcp_client.go

@@ -48,6 +48,7 @@ type GCPClientManager interface {
 	CreateFirewallRule(projectID string, rule *computepb.Firewall) error
 	CreateInstance(projectID, zone string, instance *computepb.Instance) error
 	GetInstance(projectID, zone, instanceName string) (*computepb.Instance, error)
+	StartInstance(projectID, zone, instanceName string) error
 	CreateAddress(projectID, region string, address *computepb.Address) (string, error)
 	GetAddress(projectID, region, addressName string) (*computepb.Address, error)
 	EnsureDNSManagedZone(projectID, zoneName, dnsName, description string) error
@@ -552,6 +553,26 @@ func (c *GCPClient) GetInstance(projectID, zone, instanceName string) (*computep
 	})
 }
 
+// StartInstance starts a stopped Compute Engine instance in the specified project and zone.
+func (c *GCPClient) StartInstance(projectID, zone, instanceName string) error {
+	client, err := compute.NewInstancesRESTClient(c.ctx)
+	if err != nil {
+		return err
+	}
+	defer util.IgnoreError(client.Close)
+
+	op, err := client.Start(c.ctx, &computepb.StartInstanceRequest{
+		Project:  projectID,
+		Zone:     zone,
+		Instance: instanceName,
+	})
+	if err != nil {
+		return err
+	}
+
+	return op.Wait(c.ctx)
+}
+
 // CreateAddress creates a new static IP address in the specified project and region.
 func (c *GCPClient) CreateAddress(projectID, region string, address *computepb.Address) (string, error) {
 	client, err := compute.NewAddressesRESTClient(c.ctx)