package gcp import ( "context" "fmt" "github.com/edgelesssys/constellation/internal/cloud/metadata" "github.com/edgelesssys/constellation/internal/gcpshared" ) // API handles all GCP API requests. type API interface { // RetrieveInstances retrieves a list of all accessible GCP instances with their metadata. RetrieveInstances(ctx context.Context, project, zone string) ([]metadata.InstanceMetadata, error) // RetrieveInstances retrieves a single GCP instances with its metadata. RetrieveInstance(ctx context.Context, project, zone, instanceName string) (metadata.InstanceMetadata, error) // RetrieveInstanceMetadata retrieves the GCP instance metadata of the current instance. RetrieveInstanceMetadata(attr string) (string, error) // RetrieveProjectID retrieves the GCP projectID containing the current instance. RetrieveProjectID() (string, error) // RetrieveZone retrieves the GCP zone containing the current instance. RetrieveZone() (string, error) // RetrieveInstanceName retrieves the instance name of the current instance. RetrieveInstanceName() (string, error) // RetrieveSubnetworkAliasCIDR retrieves the subnetwork CIDR of the current instance. RetrieveSubnetworkAliasCIDR(ctx context.Context, project, zone, instanceName string) (string, error) // RetrieveLoadBalancerIP retrieves the load balancer IP of the current instance. RetrieveLoadBalancerIP(ctx context.Context, project, zone string) (string, error) // SetInstanceMetadata sets metadata key: value of the instance specified by project, zone and instanceName. SetInstanceMetadata(ctx context.Context, project, zone, instanceName, key, value string) error // UnsetInstanceMetadata removes a metadata key-value pair of the instance specified by project, zone and instanceName. UnsetInstanceMetadata(ctx context.Context, project, zone, instanceName, key string) error } // Metadata implements core.ProviderMetadata interface. type Metadata struct { api API } // New creates a new Provider with real API and FS. func New(api API) *Metadata { return &Metadata{ api: api, } } // List retrieves all instances belonging to the current constellation. func (m *Metadata) List(ctx context.Context) ([]metadata.InstanceMetadata, error) { project, err := m.api.RetrieveProjectID() if err != nil { return nil, err } zone, err := m.api.RetrieveZone() if err != nil { return nil, err } instances, err := m.api.RetrieveInstances(ctx, project, zone) if err != nil { return nil, fmt.Errorf("retrieving instances list from GCP api: %w", err) } return instances, nil } // Self retrieves the current instance. func (m *Metadata) Self(ctx context.Context) (metadata.InstanceMetadata, error) { project, err := m.api.RetrieveProjectID() if err != nil { return metadata.InstanceMetadata{}, err } zone, err := m.api.RetrieveZone() if err != nil { return metadata.InstanceMetadata{}, err } instanceName, err := m.api.RetrieveInstanceName() if err != nil { return metadata.InstanceMetadata{}, err } return m.api.RetrieveInstance(ctx, project, zone, instanceName) } // GetInstance retrieves an instance using its providerID. func (m *Metadata) GetInstance(ctx context.Context, providerID string) (metadata.InstanceMetadata, error) { project, zone, instanceName, err := gcpshared.SplitProviderID(providerID) if err != nil { return metadata.InstanceMetadata{}, fmt.Errorf("invalid providerID: %w", err) } return m.api.RetrieveInstance(ctx, project, zone, instanceName) } // GetSubnetworkCIDR returns the subnetwork CIDR of the current instance. func (m *Metadata) GetSubnetworkCIDR(ctx context.Context) (string, error) { project, err := m.api.RetrieveProjectID() if err != nil { return "", err } zone, err := m.api.RetrieveZone() if err != nil { return "", err } instanceName, err := m.api.RetrieveInstanceName() if err != nil { return "", err } return m.api.RetrieveSubnetworkAliasCIDR(ctx, project, zone, instanceName) } // SupportsLoadBalancer returns true if the cloud provider supports load balancers. func (m *Metadata) SupportsLoadBalancer() bool { return true } // GetLoadBalancerIP returns the IP of the load balancer. func (m *Metadata) GetLoadBalancerIP(ctx context.Context) (string, error) { project, err := m.api.RetrieveProjectID() if err != nil { return "", err } zone, err := m.api.RetrieveZone() if err != nil { return "", err } return m.api.RetrieveLoadBalancerIP(ctx, project, zone) } // Supported is used to determine if metadata API is implemented for this cloud provider. func (m *Metadata) Supported() bool { return true }