feat: enforce template-level constraints for TTL and autostart (#2018)

This PR adds fields to templates that constrain values for workspaces derived from that template.

- Autostop: Adds a field max_ttl on the template which limits the maximum value of ttl on all workspaces derived from that template. Defaulting to 168 hours, enforced on edits to workspace metadata. New workspaces will default to the templates's `max_ttl` if not specified.
- Autostart: Adds a field min_autostart_duration which limits the minimum duration between successive autostarts of a template, measured from a single reference time. Defaulting to 1 hour, enforced on edits to workspace metadata.

codersdk/organizations.go

@@ -61,6 +61,15 @@ type CreateTemplateRequest struct {
 	// templates, but it doesn't make sense for users.
 	VersionID       uuid.UUID                `json:"template_version_id" validate:"required"`
 	ParameterValues []CreateParameterRequest `json:"parameter_values,omitempty"`
+
+	// MaxTTLMillis allows optionally specifying the maximum allowable TTL
+	// for all workspaces created from this template.
+	MaxTTLMillis *int64 `json:"max_ttl_ms,omitempty"`
+
+	// MinAutostartIntervalMillis allows optionally specifying the minimum
+	// allowable duration between autostarts for all workspaces created from
+	// this template.
+	MinAutostartIntervalMillis *int64 `json:"min_autostart_interval_ms,omitempty"`
 }
 
 // CreateWorkspaceRequest provides options for creating a new workspace.

codersdk/templates.go

@@ -13,15 +13,17 @@ import (
 // Template is the JSON representation of a Coder template. This type matches the
 // database object for now, but is abstracted for ease of change later on.
 type Template struct {
-	ID                  uuid.UUID       `json:"id"`
-	CreatedAt           time.Time       `json:"created_at"`
-	UpdatedAt           time.Time       `json:"updated_at"`
-	OrganizationID      uuid.UUID       `json:"organization_id"`
-	Name                string          `json:"name"`
-	Provisioner         ProvisionerType `json:"provisioner"`
-	ActiveVersionID     uuid.UUID       `json:"active_version_id"`
-	WorkspaceOwnerCount uint32          `json:"workspace_owner_count"`
-	Description         string          `json:"description"`
+	ID                         uuid.UUID       `json:"id"`
+	CreatedAt                  time.Time       `json:"created_at"`
+	UpdatedAt                  time.Time       `json:"updated_at"`
+	OrganizationID             uuid.UUID       `json:"organization_id"`
+	Name                       string          `json:"name"`
+	Provisioner                ProvisionerType `json:"provisioner"`
+	ActiveVersionID            uuid.UUID       `json:"active_version_id"`
+	WorkspaceOwnerCount        uint32          `json:"workspace_owner_count"`
+	Description                string          `json:"description"`
+	MaxTTLMillis               int64           `json:"max_ttl_ms"`
+	MinAutostartIntervalMillis int64           `json:"min_autostart_interval_ms"`
 }
 
 type UpdateActiveTemplateVersion struct {