Support on-demand connection init in the provider

nsxt/provider.go

@@ -210,6 +210,12 @@ func Provider() *schema.Provider {
 				Optional:    true,
 				DefaultFunc: schema.EnvDefaultFunc("NSXT_CA", nil),
 			},
+			"on_demand_connection": {
+				Type:        schema.TypeBool,
+				Optional:    true,
+				Description: "Avoid initializing NSX connection on startup",
+				DefaultFunc: schema.EnvDefaultFunc("NSXT_ON_DEMAND_CONNECTION", false),
+			},
 		},
 
 		DataSourcesMap: map[string]*schema.Resource{
@@ -407,13 +413,19 @@ func Provider() *schema.Provider {
 }
 
 func configureNsxtClient(d *schema.ResourceData, clients *nsxtClients) error {
+	onDemandConn := d.Get("on_demand_connection").(bool)
 	clientAuthCertFile := d.Get("client_auth_cert_file").(string)
 	clientAuthKeyFile := d.Get("client_auth_key_file").(string)
 	clientAuthCert := d.Get("client_auth_cert").(string)
 	clientAuthKey := d.Get("client_auth_key").(string)
 	vmcToken := d.Get("vmc_token").(string)
 	vmcAuthMode := d.Get("vmc_auth_mode").(string)
 
+	if onDemandConn {
+		// On demand connection option is not supported with old SDK
+		return nil
+	}
+
 	if (len(vmcToken) > 0) || (vmcAuthMode == "Basic") {
 		// VMC can operate without token with basic auth, however MP API is not
 		// available for cloud admin user
@@ -605,6 +617,7 @@ func getConnectorTLSConfig(d *schema.ResourceData) (*tls.Config, error) {
 }
 
 func configurePolicyConnectorData(d *schema.ResourceData, clients *nsxtClients) error {
+	onDemandConn := d.Get("on_demand_connection").(bool)
 	host := d.Get("host").(string)
 	username := d.Get("username").(string)
 	password := d.Get("password").(string)
@@ -617,6 +630,19 @@ func configurePolicyConnectorData(d *schema.ResourceData, clients *nsxtClients)
 	policyGlobalManager := d.Get("global_manager").(bool)
 	vmcAuthMode := d.Get("vmc_auth_mode").(string)
 
+	isVMC := false
+	if (len(vmcAccessToken) > 0) || (vmcAuthMode == "Basic") {
+		isVMC = true
+		if onDemandConn {
+			return fmt.Errorf("on demand connection option is not supported with VMC")
+		}
+	}
+
+	if d.HasChange("license_keys") && onDemandConn {
+		// TODO - remove this constraint when license is rewritten with new SDK
+		return fmt.Errorf("on demand connection option is not supported with license feature")
+	}
+
 	if host == "" {
 		return fmt.Errorf("host must be provided")
 	}
@@ -683,7 +709,12 @@ func configurePolicyConnectorData(d *schema.ResourceData, clients *nsxtClients)
 	clients.PolicyEnforcementPoint = policyEnforcementPoint
 	clients.PolicyGlobalManager = policyGlobalManager
 
-	if (len(vmcAccessToken) > 0) || (vmcAuthMode == "Basic") {
+	if onDemandConn {
+		// version init will happen on demand
+		return nil
+	}
+
+	if isVMC {
 		// Special treatment for VMC since MP API is not available there
 		initNSXVersionVMC(*clients)
 		return nil
@@ -936,6 +967,11 @@ func getPolicyConnectorWithHeaders(clients interface{}, customHeaders *map[strin
 		connectorOptions = append(connectorOptions, client.WithRequestProcessors(requestProcessors...))
 	}
 	connector := client.NewConnector(c.Host, connectorOptions...)
+
+	// Init NSX version if not done yet
+	if nsxVersion == "" {
+		initNSXVersion(connector)
+	}
 	return connector
 }
 

website/docs/index.html.markdown

@@ -236,7 +236,12 @@ The following arguments are used to configure the VMware NSX-T Provider:
 * `global_manager` - (Optional) True if this is a global manager endpoint.
   False by default.
 * `license_keys` - (Optional) List of NSX-T license keys. License keys are applied
-  during plan and will not be deleted if they are removed from the configuration.
+  during plan or apply commands.
+* `on_demand_connection` - (Optional) Avoid verification on NSX connectivity on provider
+  startup. Instead, initialize the connection on demand. This setting can not be turned on
+  for VMC environments, and is not supported with deprecated NSX manager resources and
+  data sources. Note - this setting is useful when NSX manager is not yet available at 
+  time of provider evaluation, and not recommended to be turned on otherwise.
 
 ## NSX Logical Networking