Deploying Aria Suite LCM from SDDC manager fails at "VRSLCM_DEPLOYMENT_FAILED Could not SSH to VMware Aria Suite Lifecycle!"

Products

• VMware SDDC Manager

Issue/Introduction

This issue occurs when the Aria Suite tries to deploy the VM in the vCenter server but is unable to SSH with the SDDC MANAGER. 

/var/log/vmware/vcf/domainmanager/domainmanager.log

YYYY-MM-DDTxx:xx:xx:xxx+0000 ERROR [vcf_dm,685a44bxxxxxxxxxxxxxxx,xxxx] [c.v.e.s.o.model.error.ErrorFactory,dm-exec-12]  [B431MA] VRSLCM_STATUS_UPDATE_FAILED Updating VMware Aria Suite Lifecycle status failed

com.vmware.evo.sddc.orchestrator.exceptions.OrchTaskException: Updating VMware Aria Suite Lifecycle status failed

Caused by: java.lang.RuntimeException: POST request failed with: {"errorCode":"INVENTORY_RESOURCE_NOT_FOUND","arguments":["Domain"],"message":"Domain not found","referenceToken":"6JUL4A"}

YYYY-MM-DD-xxxxx.xxx+0000 ERROR [vcf_dm,685a50fxxxxxxxxxxxxxxxxx,xxxx] [c.v.e.s.o.model.error.ErrorFactory,dm-exec-2]  [ED0SKN] VRSLCM_DEPLOYMENT_FAILED Could not SSH to VMware Aria Suite Lifecycle!

com.vmware.evo.sddc.orchestrator.exceptions.OrchTaskException: Could not SSH to VMware Aria Suite Lifecycle!

Environment

VMware cloud Foundation 5.x

Cause

The issue occurs when VMware Aria Suite Lifecycle (vRLCM) attempts to deploy the appliance but fails to establish an SSH connection with the SDDC Manager, resulting in deployment failure. This indicates that the SSH authentication between SDDC Manager and vRSLCM VM is failing, likely due to invalid credentials, missing key exchange configuration, or a network connectivity issue between the two components during the orchestration task.

This failure prevents SDDC Manager from completing the deployment workflow for Aria Suite Lifecycle, and also affects its ability to update the status of the deployment.

Resolution

• Follow the below KB to update the ssh host key on the sddc manager 

  How to update the SSH host keys on the SDDC Manager

• Please create a password that meets the complexity requirements.