This section explains how to perform the following upgrade.

To upgrade to CSP 1.4.2 - PKI Hub 1.5.2

1. Follow the steps in Downloading the installation files to download the following file: 

   Cryptographic Security Platform 1.4.2 - PKI Hub 1.5.2 for VMware vSphere, Hyper-V and Nutanix

    You need this ISO image file to upgrade any installation, ISO-based or non-ISO-based. ​

2. Back up the installation state as explained in the "Backing up PKI Hub" section of the PKI Hub Guide for the version you are upgrading from.
3. Repeat the following steps sequentially on each PKI Hub node, ensuring they are not performed simultaneously on multiple nodes. 
   1. Use an SFTP client to copy the PKI Hub ISO image file to the /home/sysadmin node folder. 
   2. Run the clusterctl upgrade command and wait for it to complete (around 2 hours) before proceeding to the next node.
4. Reboot each node sequentially, allowing at least 15 minutes between reboots.
5. Back up the installation state as explained in section Backing up PKI Hub of this guide.