## Deploying ordering nodes 

Now, deploy the ordering service in your organization. 

1. On the Nodes  page, click  Add ordering service . 

2. Confirm that the option to Create an ordering service  is selected. Then, click Next . 

3. Give your ordering service a Display name , and choose whether you want your ordering service to have one node (sufficient for development and testing) or five nodes (good for production). If you want to use an external CA, select it here. 

Note:  To use an external CA, you must first build an MSP definition file that includes certificates from the external CA. Then, import that file into the Organizations tab. 

Click Next . 

4. On the next panel, select Ordering Service CA as your CA. Then, select the enroll ID  for the node identity that you created for your ordering service from the drop-down list, and enter the associated secret . Then, select your MSP from the drop-down list. 

5. The next side panel asks for TLS CA information. When you created the CA, a TLS CA was created alongside it. This CA is used to create certificates for the secure communication layer for nodes. Therefore, in the drop-down list select the enroll ID  for the ordering service identity that you created, and enter its associated secret . The TLS Certificate Signing Request (CSR) hostname is an option for those who want to specify a custom domain name that can be used to address the ordering service endpoint. Click Next . 

6. Configure resource allocation for the node. The selections that you make here are applied to all five ordering nodes. If you want to learn more about how to allocate resources in IBM Cloud for your node, see this topic in the IBM Knowledge Center: https://cloud.ibm.com/docs/services/blockchain?topic=blockchain-ibp-console-gov ern#ibp-console-govern-allocate-resources 

7. In the Associate identity step, you can choose an admin for your ordering service. Select an admin and click Next . 

8. Review the Summary page  and click Add ordering service . 

Figure 4-36 confirms that the ordering service was successfully deployed. 

