Apply Changes fails on OPS Manager as it cant complete the IaaS verifiers due to "503 Service Unavailable" error:
"IaaS default: 'Connection failed: 503 \\\"Service Unavailable\\\"', type: PrivilegeVerifier\",
"IaaS default: 'Connection failed: 503 \\\"Service Unavailable\\\"', type: IaasConfigurationVerifier\",
"IaaS default: 'Connection failed: 503 \\\"Service Unavailable\\\"', type: AvailabilityZonesVerifier\",
"'Connection failed: 503 \\\"Service Unavailable\\\"', type: NetworksExistenceVerifier\"],
This is observed in OPS Manager ui and OPS Manager audit logs.
An attempt to create a VM fails as the Bosh Director cant connect to ssl proxy with status 503 Service Unavailable also observed.
"error": "Unknown CPI error 'Unknown' with message 'connect to ssl proxy failed with status 503 Service Unavailable' in 'create_vm' CPI method
vSphere UI is working as expected when verified via direct connectivity.
However connectivity from OPS Manager and Bosh Director to vSphere is via a HTTP Proxy and it is blocking the connectivity.
Review HTTP Proxy configuration in OPS Manager--->Setting (Top right hand)--->Proxy Settings. Confirm no proxy rules are as expected.
Review HTTP Proxy logs to determine why proxy is not allowing connectivity to vSphere.