Replacing Certificates in a VMware vCloud Director Deployment

In a VMware vCloud Director deployment, it is essential to ensure that the certificates used for authentication and encryption are up-to-date and valid. This guide provides a step-by-step procedure for replacing the certificates of a single cell deployment, with modifications for multi-cell deployments. Please note that this procedure should only be performed by authorized personnel and with proper testing to ensure minimal downtime and disruption to the deployment.

Step 1: Backup the Existing Certificates

Before replacing the certificates, it is crucial to backup the existing ones to avoid any issues during the transition. You can use the following command to backup the certificates:

“`

vcloud-cmd –cell backup-certificate

“`

Step 2: Create a New Certificate Signing Request (CSR)

To create a new CSR, you will need to generate a new private key and certificate signing request file. You can use the following command to generate a new CSR:

“`

openssl req -x509 -newkey rsa:2048 -nodes -keyout cert.key -out cert.csr -subj “/CN=“

“`

Replace `` with the name of your cell. The generated CSR file will be located in the `cert.csr` file, and the private key will be located in the `cert.key` file.

Step 3: Send the CSR to Your CA for Signing

Once you have created the CSR, you need to send it to your Certificate Authority (CA) for signing. You can use the following command to send the CSR to your CA:

“`

openssl x509 -inform der -in cert.csr -out cert.pem -days 365 -CA ca.crt -CAkey ca.key -set_serial 1234567890

“`

Replace `ca.crt` and `ca.key` with the paths to your CA’s certificate and private key files, respectively. The `set_serial` option sets the serial number of the certificate to `1234567890`.

Step 4: Copy the Signed Certificate to Each Cell

Once your CA has signed the CSR, you need to copy the signed certificate to each cell in your deployment. You can use the following command to copy the signed certificate to a specific cell:

“`

vcloud-cmd –cell update-certificate cert.pem

“`

Replace `` with the name of the cell you want to update. The `update-certificate` command updates the certificate for the specified cell.

Step 5: Update the vCloud Director Configuration

After copying the signed certificate to each cell, you need to update the vCloud Director configuration to use the new certificates. You can use the following command to update the vCloud Director configuration:

“`

vcloud-cmd –config update-certificate

“`

This command updates the vCloud Director configuration to use the new certificates.

Step 6: Test the Certificates

After updating the vCloud Director configuration, you need to test the certificates to ensure that they are working correctly. You can use the following command to test the certificates:

“`

vcloud-cmd –cell certificate-test

“`

Replace `` with the name of the cell you want to test. The `certificate-test` command tests the certificates for the specified cell.

Multi-Cell Deployments

If you are using a multi-cell deployment, you need to extend the information in the `-ext “san=dns:…”` parameter of the certificate creation to include each cell DNS and IP, as well as the VIP FQDN at least. This ensures that the certificates are valid for all cells in the deployment.

Conclusion

In conclusion, replacing the certificates in a VMware vCloud Director deployment is a critical task that should be performed regularly to ensure the security and integrity of your deployment. By following the steps outlined in this guide, you can replace the certificates with minimal downtime and disruption to your deployment. Additionally, if you are using a multi-cell deployment, you need to extend the information in the `-ext “san=dns:…”` parameter of the certificate creation to include each cell DNS and IP, as well as the VIP FQDN at least.