The VMware Certificate Authority (VMCA) is a component of VMware vSphere that manages certificates for vCenter Server and ESXi hosts. Here are some key points about VMCA:
- Certificate Management: VMCA automates the management of certificates within a vSphere deployment, making it easier to handle the numerous certificates required.
- Modes of Operation:
- VMCA Default: Uses a self-signed root certificate to issue certificates for vCenter, ESXi, and other VMware components.
- VMCA Enterprise: Acts as a subordinate CA, issuing certificates that trust up to the enterprise CA’s root certificate.
- Custom: Allows users to bypass VMCA and use their own certificates for VMware components.
- Integration with vSphere: VMCA is installed on every vCenter Server host and secures the solution without additional modifications. It provisions ESXi hosts with signed certificates when they are added to vCenter Server.
- Certificate Store: VMware Endpoint Certificate Store (VECS) is used to store certificates, private keys, and other certificate information locally on each host.
- Certificate Manager Tool: vSphere includes a Certificate Manager tool to simplify the process of managing and replacing certificates.