gitpod/components/ws-manager-api/core.proto

syntax = "proto3";

package wsman;

option go_package = "github.com/gitpod-io/gitpod/ws-manager/api";

import "content-service-api/initializer.proto";
import "google/protobuf/timestamp.proto";
import "google/protobuf/duration.proto";

service WorkspaceManager {
    // getWorkspaces produces a list of running workspaces and their status
    rpc GetWorkspaces(GetWorkspacesRequest) returns (GetWorkspacesResponse) {}

    // startWorkspace creates a new running workspace within the manager's cluster
    rpc StartWorkspace(StartWorkspaceRequest) returns (StartWorkspaceResponse) {}

    // stopWorkspace stops a running workspace
    rpc StopWorkspace(StopWorkspaceRequest) returns (StopWorkspaceResponse) {}

    // describeWorkspace investigates a workspace and returns its status, and configuration
    rpc DescribeWorkspace(DescribeWorkspaceRequest) returns (DescribeWorkspaceResponse) {}

    // backupWorkspace backs up a running workspace
    rpc BackupWorkspace(BackupWorkspaceRequest) returns (BackupWorkspaceResponse) {}

    // subscribe streams all status updates to a client
    rpc Subscribe(SubscribeRequest) returns (stream SubscribeResponse) {}

    // markActive records a workspace as being active which prevents it from timing out
    rpc MarkActive(MarkActiveRequest) returns (MarkActiveResponse) {}

    // setTimeout changes the default timeout for a running workspace
    rpc SetTimeout(SetTimeoutRequest) returns (SetTimeoutResponse) {}

    // controlPort publicly exposes or un-exposes a network port for a workspace
    rpc ControlPort(ControlPortRequest) returns (ControlPortResponse) {}

    // takeSnapshot creates a copy of the workspace content which can initialize a new workspace.
    rpc TakeSnapshot(TakeSnapshotRequest) returns (TakeSnapshotResponse) {}

    // controlAdmission makes a workspace accessible for everyone or for the owner only
    rpc ControlAdmission(ControlAdmissionRequest) returns (ControlAdmissionResponse) {}

    // deleteVolumeSnapshot asks ws-manager to delete specific volume snapshot and delete source from cloud provider as well
    rpc DeleteVolumeSnapshot(DeleteVolumeSnapshotRequest) returns (DeleteVolumeSnapshotResponse) {}

    // UpdateSSHKey update ssh keys
    rpc UpdateSSHKey(UpdateSSHKeyRequest) returns (UpdateSSHKeyResponse) {}

    // describeCluster provides information about the cluster
    rpc DescribeCluster(DescribeClusterRequest) returns (DescribeClusterResponse) {}
}

// MetadataFilter describes conditions for matching a set of workspaces.
// The values of the fields have to match exactly, and set values must match.
message MetadataFilter {
    // owner is the ID of the Gitpod user to whom we'll bill this workspace and who we consider responsible for its content
	string owner = 1;

    // meta_id is the workspace ID of this currently running workspace instance on the "meta pool" side
    string meta_id = 2;

    // annotations must be a subset of the annotations of a workspace's metadata
    map<string, string> annotations = 3;
}

// GetWorkspacesRequest requests a list of running workspaces
message GetWorkspacesRequest {
    // MustMatch can specify an exactly matching filter for listing workspaces.
    // If not set, or all fields are empty, all workspaces are returned.
    MetadataFilter must_match = 1;
}

// GetWorkspacesResponse is the response to a get w
message GetWorkspacesResponse {
    // status are the status of all running workspaces
    repeated WorkspaceStatus status = 1;
}

// StartWorkspaceRequest requests that the workspace manager starts a workspace in its cluster
message StartWorkspaceRequest {
    // ID is a unique identifier of this workspace. No other workspace with the same name must be managed by this workspace manager
    string id = 1;

    // service_prefix is the unique ID/name that's prepended before the services associated with a workspace.
    // For example if the service_prefix is foobar there will be the services foobar-theia and foobar-ports.
    // If this field is empty the workspace ID becomes the service prefix.
    string service_prefix = 2;

    // Metadata is data associated with this workspace that's required for other parts of Gitpod to function
    WorkspaceMetadata metadata = 3;

    // Spec is the configuration of the workspace that's required for the ws-manager to start the workspace
    StartWorkspaceSpec spec = 4;

    // DEPRECATED bool headless = 5
    // see https://developers.google.com/protocol-buffers/docs/proto3#reserved reg. gRPC field deprecation
    reserved 5;

    // Type denotes the kind of workspace we ought to start
    WorkspaceType type = 6;
}

message StartWorkspaceResponse {
    // URL is the external URL of the workspace
    string url = 1;

    // OwnerToken is the token of the workspace owner used for authentication
    string owner_token = 2;
}

// StopWorkspaceRequest requests that the workspace manager stops a workspace
message StopWorkspaceRequest {
    // ID is the unique identifier of the workspace to stop
    string id = 1;

    // Policy determines how quickly a workspace will be stopped
    StopWorkspacePolicy policy = 2;
}

enum StopWorkspacePolicy {
    NORMALLY = 0;
    IMMEDIATELY = 1;
    ABORT = 2;
}

// StopWorkspaceResponse is the answer to a stop workspace request
message StopWorkspaceResponse {}

// DescribeWorkspaceRequest requests the status of a workspace
message DescribeWorkspaceRequest {
    // ID is the unique identifier of the workspace to describe
    string id = 1;
}

// DescribeWorkspaceResponse is the answer to a workspace description request
message DescribeWorkspaceResponse {
    WorkspaceStatus status = 1;

    // LastActivity is the time when the workspace was last marked active - ISO8601 formated
    string lastActivity = 2;
}

// SubscribeRequest requests to be notified whenever the workspace status changes
message SubscribeRequest {
    // MustMatch can specify an exactly matching filter for listening to workspaces.
    // If not set, or all fields are empty, all workspace status updates or log output are returned.
    MetadataFilter must_match = 1;
}

// SubscribeResponse notifies a client when a workspace's status changes
message SubscribeResponse {
    WorkspaceStatus status = 1;
    // was used for logs
    reserved 2;
    map<string, string> header = 3;
}

// MarkActiveRequest marks a workspace as still in use
message MarkActiveRequest {
    // id is the ID of the workspace
    string id = 1;

    // closed marks a workspace as closed which will shorten its timeout
    bool closed = 2;

    // ignore_if_active only marks active when user never mark active, otherwise it will ignore
    bool ignore_if_active = 3;
}

// MarkActiveResponse is the answer to a mark workspace active request
message MarkActiveResponse {}

enum TimeoutType {
    WORKSPACE_TIMEOUT = 0;
    CLOSED_TIMEOUT = 1;
}

// SetTimeoutRequest configures the timeout of a workspace
message SetTimeoutRequest {
    // id is the ID of the workspace
    string id = 1;

    // duration is the new timeout duration. Must be a valid Go duration (see https://golang.org/pkg/time/#ParseDuration)
    string duration = 2;

    TimeoutType type = 3;
}

// SetTimeoutResponse is the answer to a set timeout request
message SetTimeoutResponse {}

// ControlPortRequest exposes or un-exposes networking ports of a workspace
message ControlPortRequest {
    // ID is the unique identifier of the workspace whose port to control
    string id = 1;

    // expose controls whether to make the port publicly available or bar if from being accessible outside of the worksapce.
    // If true, the port will become publicly available, if false it will become inaccessible from outside the workspace.
    bool expose = 2;

    // spec defines the port under control
    PortSpec spec = 3;
}

// ControlPortResponse is the answer to a workspace port control request
message ControlPortResponse {}

// TakeSnapshotRequest creates a copy of the workspace content. This copy can be used to initialize a new workspace.
message TakeSnapshotRequest {
    // ID is the unique identifier of the workspace of which to take a snapshot
    string id = 1;

    // return_immediately means we're not waiting until the snapshot is done but return immediately after starting it
    bool return_immediately = 2;
}

// TakeSnapshotResponse is the answer to a take snapshot request
message TakeSnapshotResponse {
    // URL is the location of the snapshot encoded such that it can be passed back to a snapshot initializer.
    string url = 1;
}

// ControlAdmissionRequest controls the admission of users to a workspace
message ControlAdmissionRequest {
    // ID is the unique identifier of the workspace whoose admission to control
    string id = 1;

    // level is the new workspace admission level
    AdmissionLevel level = 2;
}

message ControlAdmissionResponse {}

// DeleteVolumeSnapshotRequest deletes volume snapshot from the cluster and cloud provider
message DeleteVolumeSnapshotRequest{
    // ID is the name of volume snapshot, which is equal to instance id of workspace it was taken from
    string id = 1;

    // volume_handle is a unique string that is used to restore volume handle in k8s from cloud provider backend
    string volume_handle = 2;

    // soft_delete controls whether manager should attempt to restore volume snapshot from handle if it doesn't exist in the cluster yet
    bool soft_delete = 3;

    // ws_type is the type of workspace (prebuild or regular) to which this volume snapshot belongs
    WorkspaceType ws_type = 4;
}

message DeleteVolumeSnapshotResponse {
    // was_deleted will be true if we were able to delete volume snapshot from the cluster
    bool was_deleted = 1;
}

enum AdmissionLevel {
    // WORKSPACE_ADMIT_OWNER_ONLY means the workspace can only be accessed using the owner token
    ADMIT_OWNER_ONLY = 0;

    // WORKSPACE_ADMIT_EVERYONE means the workspace (including ports) can be accessed by everyone.
    ADMIT_EVERYONE = 1;
}

// BackupWorkspaceRequest backs up a running workspace
message BackupWorkspaceRequest {
    // ID is the unique identifier of the workspace of which to take a backup
    string id = 1;
}

// BackupWorkspaceResponse is the answer to a backup workspace request
message BackupWorkspaceResponse {
    // URL is the location of the backup
    string url = 1;
}

// UpdateSSHKeyRequest update ssh public key
message UpdateSSHKeyRequest {
    // ID is the unique identifier of the workspace
    string id = 1;

    // keys is a set of authorized_keys
    repeated string keys = 2;
}

// UpdateSSHKeyResponse is the answer to a upload ssh key request
message UpdateSSHKeyResponse {}

// WorkspaceStatus describes a workspace status
message WorkspaceStatus {
    // ID is the unique identifier of the workspace
    string id = 1;

    // version of the status update. Workspace instances themselves are unversioned,
    // but their status has different versions.
    // The value of this field has no semantic meaning (e.g. don't interpret it as
    // as a timestamp), but it can be used to impose a partial order.
    // If a.status_version < b.status_version then a was the status before b.
    uint64 status_version = 10;

    // Metadata is data associated with this workspace that's required for other parts of Gitpod to function
    WorkspaceMetadata metadata = 2;

    // Spec is the workspace spec during runtime
    WorkspaceSpec spec = 3;

    // the phase of a workspace is a simple, high-level summary of where the workspace is in its lifecycle
    WorkspacePhase phase = 4;

    // conditions detail the current state of the workspace
    WorkspaceConditions conditions = 5;

    // message is an optional human-readable message detailing the current phase
    string message = 6;

    // repo details the Git working copy status of the workspace.
    // Note: this is a best-effort field and more often than not will not be present. Its absence does not
    // indicate the absence of a working copy.
    contentservice.GitStatus repo = 7;

    // runtime contains information about the workspace's runtime environment
    WorkspaceRuntimeInfo runtime = 8;

    // auth provides authentication information about the workspace. This info is primarily used by ws-proxy.
    WorkspaceAuthentication auth = 9;

    // metrics contains metrics about the workspace
    InitializerMetrics initializer_metrics = 11;
}

// IDEImage configures the IDE images a workspace will use
message IDEImage {
    // web_ref is a reference to an OCI image used for serving the web-based IDE
    string web_ref = 1;
    // DEPRECATED desktop_ref is an optional reference to an OCI image used for serving desktop IDEs
    reserved 2;
    // supervisor_ref is a reference to an OCI image used as supervisor
    string supervisor_ref = 3;
    // DEPRECATED desktop_plugin_ref is an optional reference to an OCI image used for serving desktop IDE plugin
    reserved 4;
}

// WorkspaceSpec is the specification of a workspace at runtime
message WorkspaceSpec {
    // workspace_image is the name of the Docker image this workspace runs
    string workspace_image = 1;

    // deprecated_ide_image is a field present for backwards compatibility and the same
    // as IDEImage.web_ref. If both fields are present, IDEImage.web_ref takes precedence.
    reserved 2;

    // headless marks this workspace a headless one - headless workspaces are not intended for users but for automation
    bool headless = 3;

    // URL is the external URL of the workspace
    string url = 4;

    // exposed_ports lists all ports which this workspace has exposed to the outside world
    repeated PortSpec exposed_ports = 5;

    // workspace type denotes what kind of workspace this is, e.g. if it's user-facing, prebuilding content or probing the service
    WorkspaceType type = 6;

    // The intervals in which a heartbeat must be received for the workspace not to time out
    string timeout = 7;

    // ide_image is the name of the Docker image used as IDE
    IDEImage ide_image = 8;

    // class names the class of this workspace
    string class = 9;

    // ide_image_layers are contains the images needed for the ide to run,
    // including ide-desktop, desktop-plugin and so on
    repeated string ide_image_layers = 10;

    // The timeout for closed ide.
    string closed_timeout = 11;
}

// PortSpec describes a networking port exposed on a workspace
message PortSpec {
    // port is the outward-facing port
    uint32 port = 1;

    // DEPRECATED target is the inward-facing target port
    reserved 2;

    // visibility defines the visibility of the port
    PortVisibility visibility = 3;

    // url is the public-facing URL this port is available at
    string url = 4;

    // protocol is the workspace port protocol, default is http
    PortProtocol protocol = 5;
}

// PortVisibility defines who may access a workspace port which is guarded by an authentication in the proxy
enum PortVisibility {
    // private (default) means the port is accessible by the workspace owner only, unless the workspace's admission is
    // set to everyone.
    PORT_VISIBILITY_PRIVATE = 0;

    // public means the port is accessible by everybody using the workspace port URL
    PORT_VISIBILITY_PUBLIC = 1;
}

// PortProtocol defines the workspace port protocol
enum PortProtocol {
    // http means workspace port protocol is http
    PORT_PROTOCOL_HTTP = 0;

    // https means workspace port protocol is https
    PORT_PROTOCOL_HTTPS = 1;
}

// VolumeSnapshotInfo defines volume snapshot information
message VolumeSnapshotInfo {
    // volume_snapshot_name is the name of volume snapshot
    string volume_snapshot_name = 1;

    // volume_snapshot_handle is a handle that is used to restore volume snapshot
    string volume_snapshot_handle = 2;
}

// WorkspaceCondition gives more detailed information as to the state of the workspace. Which condition actually
// has a value depends on the phase the workspace is in.
message WorkspaceConditions {
    // failed contains the reason the workspace failed to operate. If this field is empty, the workspace has not failed.
    string failed = 1;

    // timeout contains the reason the workspace has timed out. If this field is empty, the workspace has not timed out.
    string timeout = 2;

    // pulling_images marks if the workspace is currently pulling its images. This condition can only be set during PhaseCreating
    WorkspaceConditionBool pulling_images = 3;

    // DEPRECATED service_exists denotes if the workspace theia-/ports- services exist. This condition will be true if either of the two services exist.
    reserved 4;

    // snapshot contains a snapshot URL if a snapshot was produced prior to shutting the workspace down. This condition is only used for headless workspaces.
    string snapshot = 5;

    // final_backup_complete determines if the last state of the workspace has been backed up to remote storage.
    // Once this is true, a new workspace with the same ID will be able to use this backup.
    WorkspaceConditionBool final_backup_complete = 6;

    // deployed indicates if a workspace container is currently deployed. If this condition is false, there is no means for the user to alter the workspace content.
    WorkspaceConditionBool deployed = 7;

    // network_not_ready indicates if a workspace container is currently experiencing a network problem.
    WorkspaceConditionBool network_not_ready = 8;

    // first_user_activity is the time when MarkActive was first called on the workspace
    google.protobuf.Timestamp first_user_activity = 9;

    // headless_task_failed indicates that a headless workspace task failed
    string headless_task_failed = 10;

    // stopped_by_request is true if the workspace was stopped using a StopWorkspace call
    WorkspaceConditionBool stopped_by_request = 11;

    // volume_snapshot contains info about volume snapshot that was used to save persistent volume
    VolumeSnapshotInfo volume_snapshot = 12;

    // aborted is true if StopWorkspace was called with StopWorkspacePolicy set to ABORT
    WorkspaceConditionBool aborted = 13;
}

// WorkspaceConditionBool is a trinary bool: true/false/empty
enum WorkspaceConditionBool {
    FALSE = 0;
    TRUE = 1;
    EMPTY = 2;
}

// WorkspacePhase is a simple, high-level summary of where the workspace is in its lifecycle.
// The phase is not intended to be a comprehensive rollup of observations of the workspace state,
// nor is it intended to be a comprehensive state machine.
// (based on  https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#pod-phase)
enum WorkspacePhase {
    // Unknown indicates an issue within the workspace manager in that it cannot determine the actual phase of
    // a workspace. This phase is usually accompanied by an error.
    UNKNOWN = 0;

    // Pending means the workspace does not yet consume resources in the cluster, but rather is looking for
    // some space within the cluster. If for example the cluster needs to scale up to accomodate the
    // workspace, the workspace will be in Pending state until that happened.
    PENDING = 1;

    // Creating means the workspace is currently being created. That includes downloading the images required
    // to run the workspace over the network. The time spent in this phase varies widely and depends on the current
    // network speed, image size and cache states.
    CREATING = 2;

    // Initializing is the phase in which the workspace is executing the appropriate workspace initializer (e.g. Git
    // clone or backup download). After this phase one can expect the workspace to either be Running or Failed.
    INITIALIZING = 3;

    // Running means the workspace is able to actively perform work, either by serving a user through Theia,
    // or as a headless workspace.
    RUNNING = 4;

    // Interrupted is an exceptional state where the container should be running but is temporarily unavailable.
    // When in this state, we expect it to become running or stopping anytime soon.
    INTERRUPTED = 7;

    // Stopping means that the workspace is currently shutting down. It could go to stopped every moment.
    STOPPING = 5;

    // Stopped means the workspace ended regularly because it was shut down.
    STOPPED = 6;
}

// WorkspaceMetadata is data associated with a workspace that's required for other parts of the system to function
message WorkspaceMetadata {
    message ImageInfo {
        // TotalSize is the total size of the image
        int64 total_size = 1;

        // WorkspaceImageSize is the size of the workspace image
        int64 workspace_image_size = 2;
    }
    message Metrics {
        ImageInfo image = 1;
    }

    // owner is the ID of the Gitpod user to whom we'll bill this workspace and who we consider responsible for its content
    string owner = 1;

    // meta_id is the workspace ID of this currently running workspace instance on the "meta pool" side
    string meta_id = 2;

    // started_at is the time when this workspace was started. Consider this field read-only, i.e. setting in a request will have no effect.
    google.protobuf.Timestamp started_at = 3;

    // Annotations are key/value pairs that gets attached to the workspace.
    // This is primarily intended for annotating headless workspace loads.
    map<string, string> annotations = 4;

    // team the workspace belongs to, if the workspace is not associated with a team, this property will be empty
    optional string team = 5;

    // project the workspace belongs to, if the workspace is not associated with a project, this property will be empty
    optional string project = 6;

    // metrics contains metrics about the workspace
    Metrics metrics = 7;
}

// WorkspaceRuntimeInfo details the workspace's runtime, e.g. executing system, node other information
// about the environment the workspace runs in. This information serves a diagnostic purpose only and
// should not be directly acted upon.
message WorkspaceRuntimeInfo {
    // node_name is the name of the node the workspace runs on
    string node_name = 1;
    // pod_name is the name of the pod the workspace runs in
    string pod_name = 2;
    // node_ip is the IP of the node the workspace runs on
    string node_ip = 3;
}

// WorkspaceAuthentication contains authentication information used by ws-proxy to allow/deny access to
// workspaces and their ports.
message WorkspaceAuthentication {
    // Admission describes who can access the workspace and its ports.
    AdmissionLevel admission = 1;

    // Owner token is the token one needs to access the workspace. Its presence is checked by ws-proxy.
    string owner_token = 2;
}

// StartWorkspaceSpec specifies the configuration of a workspace for a workspace start
message StartWorkspaceSpec {
    // workspace_image is the Docker image name of the workspace container
    string workspace_image = 1;

    // deprecated_ide_image is a field present for backwards compatibility and the same
    // as IDEImage.web_ref. If both fields are present, IDEImage.web_ref takes precedence.
    reserved 2;

    // feature_flags provide a means for starting variants of workspaces (e.g. a privileged one)
    repeated WorkspaceFeatureFlag feature_flags = 3;

    // initializer configures how the workspace is to be initialized
    contentservice.WorkspaceInitializer initializer = 4;

    // ports is the set of ports which ought to be exposed to the internet
    repeated PortSpec ports = 5;

    // envvars are user-defined environment variables which ought to be available in the workspace
    repeated EnvironmentVariable envvars = 6;

    // checkout_location describes where the code has been checked out to
    reserved 7;

    // workspace_location describes where the workspace root of Theia will be
    string workspace_location = 8;

    // Git configures the Git user in the workspace
    GitSpec git = 9;

    // timeout optionally sets a custom workspace timeout
    string timeout = 10;

    // admission controlls who can access the workspace and its ports.
    AdmissionLevel admission = 11;

    // ide_image is the Docker image name of the IDE image
    IDEImage ide_image = 12;

    // Class denotes the class of the workspace we ought to start
    string class = 13;

    // volume_snapshot to use to restore PVC from, if set
    reserved 14;

    // ssh_public_keys is user's uploaded ssh public keys
    repeated string ssh_public_keys = 15;

    // sys_envvars are system level environment variables which ought to be available in the workspace
    repeated EnvironmentVariable sys_envvars = 16;

    // ide_image_layers are contains the images needed for the ide to run,
    // including ide-desktop, desktop-plugin and so on
    repeated string ide_image_layers = 17;

    // timeout optionally sets a custom closed timeout
    string closed_timeout = 18;

    // maximum lifetime of the workspace
    string maximum_lifetime = 19;
}

// WorkspaceFeatureFlag enable non-standard behaviour in workspaces
enum WorkspaceFeatureFlag {
    // NOOP feature flag is just here because I don't want privileged to be 0
    NOOP = 0;

    // Privileged workspaces allowed users to become root by making them root on the machine.
    // They've been the precursor to user-namespaced workspaces.
    reserved 1;

    // Was used for appplitools-specific workspace config (e.g., proxy + network restriction)
    // APPLITOOLS = 2;
    reserved 2;

    // Was used for RegistryFacade which enabled the image pull through the registry facade.
    // Now this is the standard way.
    reserved 3;

    // FullWorkspaceBackup does away with the /workspace host mount. All workspace content lives
    // in the ephemeral container storage. We initlialize workspaces using content layer served by
    // the registry facade and back them up using regular "hardlink backups".
    reserved 4;

    // Was used to ensure a workspace is not subject to ws-daemon's dynamic resource limits.
    // In this sence it's akin to "guaranteed" (as compared to burstable) resources for workspaces.
    reserved 5;

    // Was used for UserNamespace
    reserved 6;

    // PERSISTENT_VOLUME_CLAIM feature flag for enabling PVC\Snapshot feature support
    reserved 7;

    // Was used for PROTECTED_SECRETS feature flag to enable secrets support
    reserved 8;

    // WORKSPACE_CLASS_LIMITING feature flag for enabling resuorce limiting based on workspace class
    reserved 9;

    // WORKSPACE_CONNECTION_LIMITING feature flag for enabling network connection rate limiting
    WORKSPACE_CONNECTION_LIMITING = 10;

    // WORKSPACE_PSI feature flag for enabling pressure stall information for workspaces
    WORKSPACE_PSI = 11;

    // SSH_CA feature flag for enabling SSH CA for workspaces
    SSH_CA = 12;
}

// GitSpec configures the Git available within the workspace
message GitSpec {
    // The Git username
    string username = 1;

    // The Git email address
    string email = 2;
}

// EnvironmentVariable describes an env var as key/value pair
message EnvironmentVariable {
    message SecretKeyRef {
        string secret_name = 1;
        string key = 2;
    }

    string name = 1;
    string value = 2;

    // Pulls the value from a secret in the cluster.
    // Use this field with great caution: if the name is wrong or Kubernetes cannot find the secret,
    // your workspace will not start. Value takes precedence over this field.
    SecretKeyRef secret = 3;
}

// WorkspaceType specifies the purpose/use of a workspace. Different workspace types are handled differently by all parts of the system.
enum WorkspaceType {
    // Regular workspaces are your off-the-mill workspaces intended for users. They are directly user-facing and hence are most important.
    REGULAR = 0;

    // Prebuild workspaces are workspaces used to pre-build the content of other workspaces. They run headless and have no direct user-interaction.
    PREBUILD = 1;

    // DEPRECATED: Probe workspaces.
    reserved 2;

    // DEPRECATED Ghost workspaces
    reserved 3;

    // Imagebuild workspaces build a workspace, incl. their Gitpod layer. They run headless and have no direct user-interaction.
    IMAGEBUILD = 4;
}

// ExposedPorts describes the exposed ports of a workspace
message ExposedPorts {
    // ports is the set of ports which ought to be exposed to the internet
    repeated PortSpec ports = 1;
}

// SSHPublicKeys describes the user's uploaded ssh public keys, it will be used only in annotations.
message SSHPublicKeys {
    // keys is the set of ssh public key
    repeated string keys = 1;
}

// DescribeClusterRequest requests information about the cluster
message DescribeClusterRequest {}

// DescribeClusterResponse is the answer to a DescribeClusterRequest
message DescribeClusterResponse {
    // workspace classes that are supported by the cluster
    repeated WorkspaceClass workspace_classes = 1;

    // preferred_workspace_class is the workspace class that is preferred by the cluster (consider this the "default" workspace class)
    string preferred_workspace_class = 2;
}

// WorkspaceClass describes a workspace class that is supported by the cluster
message WorkspaceClass {
    // ID is a unique identifier (within the cluster) of this workspace class
    string id = 1;

    // The string we display to users in the UI
    string display_name = 2;

    // The description of this workspace class
    string description = 3;

    // The cost of running a workspace of this class per minute expressed in credits
    float credits_per_minute = 4;
}

// Add these new message definitions
message InitializerMetric {
    // duration in nanoseconds (standard protobuf duration)
    google.protobuf.Duration duration = 1;

    // size in bytes
    uint64 size = 2;
}

message InitializerMetrics {
	// git contains metrics for the git initializer step
    InitializerMetric git = 1;

	// file_download contains metrics for the file download initializer step
    InitializerMetric file_download = 2;

	// snapshot contains metrics for the snapshot initializer step
	// This used for workspaces started from snapshots.
    InitializerMetric snapshot = 3;

	// backup contains metrics for the backup initializer step
    InitializerMetric backup = 4;

	// prebuild contains metrics for the prebuild initializer step
    InitializerMetric prebuild = 5;

	// composite contains metrics for the composite initializer step
    InitializerMetric composite = 6;
}