Are you still on vCloud Director 9.7 (VCD) in multi-cell configuration? Then you are susceptible to Java Message Service (JMS) certificate expiration issue. Read on.
In multi-cell set up VCD cells need to communicate between themselves. They use shared database but for much faster and efficient communication they also use internal ActiveMQ message bus. It is used for activity sharing and vCenter Server events notifications. If the message bus is dysfunctional it slows any operations almost to halt. For this particular certificate issue you will see in the logs similar message:
Could not accept connection from tcp://<primary-cell-IP:port> : javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
In vCloud Director 9.7 the bus communication become encrypted in preparation for other use cases (read here). On upgrade or new deployment of each cell new certificate was issued by internal VCD_CA with 365 day duration. In vCloud Director 10.0 or VMware Cloud Director 10.1 the certificate is regenerated upon upgrade and its duration is extended to 3 years.
To find out the certificates expiry date, run the following command from any cell:
/opt/vmware/vcloud-director/bin/cell-management-tool jms-certificates -status
It will for every cell print out its JMS certificate details:
Cell with UUID fd0d2ca0-e357-4aae-9a3b-1c1c5d143d05 and IP 192.168.3.12 has jms certificate: [
Signature Algorithm: SHA256withRSA, OID = 1.2.840.1135184.108.40.206
Key: Sun RSA public key, 2048 bits
public exponent: 65537
Validity: [From: Wed Jun 12 15:38:11 UTC 2019,
To: Thu Jun 11 15:38:11 UTC 2020]
Yes, this particular cell’s certificate will expire Jun 12 2020 – in less than two months!
Set a calendar reminder and when the certificate expiration day is approaching run the following command.
/opt/vmware/vcloud-director/bin/cell-management-tool jms-certificates --certgen
Or upgrade to vCloud Director 10.0 or newer.
Update 21/05/2020: KB 78964 has been published on this topic. Also if the CA signing certificate is expired you will need to disable SSL altogether, restart the cell, regenerate the cert and re-enable SSL.