SDDC Manager Backup Fails - Invalid parameter: Validation failed for directory path /backup/site1 on server xx.xx.xx.xx. Please make sure backup directory is intact and sftp server has write permissions on backup path.

Products

• VMware Cloud Foundation
• VMware SDDC Manager

Issue/Introduction

• SDDC Manager backups failing.

  Invalid parameter: Validation failed for directory path /backups/SDDC on server xx.xx.xx.xx. Please  ensure backup directory is intact and sftp server has write permissions on backup path.

  Sample screenshot
  

• Error in /var/log/vmware/vcf/operationsmanager/operationsmanager.log

  DEBUG [vcf_om,6cb1a29c326943b4,bff0] [c.vmware.vcf.secure.ssh.SshExecuter,http-nio-127.0.0.1-7300-e
  xec-8] Unable to establish SSH session to host <SFTP_SERVER_IP>
  com.jcraft.jsch.JSchException: reject HostKey: <SFTP_SERVER_IP>

  
  
  

Environment

VMware Cloud Foundation 4.x

VMware Cloud Foundation 5.x

 

Cause

Mismatch of external sftp server's ssh keys in sddc manager known_hosts files

Resolution

• Update the ssh keys of the SFTP server in SDDC Manager known hosts files.
• Contact Broadcom support if you need assistance