vSAN Error:
503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x00000089b916ed00] _serverNamespace = / action = Allow _po
Error: 503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x000000a63051bb30] _serverNamespace = / action = Allow _port = 8309)
You have vSAN and have restarted your ESXi host. Everything boots up and appears normal, but when you navigate to your ESXi address, you encounter this error: ‘503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x00000089b916ed00] _serverNamespace = / action = Allow _po’. Additionally, your host is not accessible from vCenter.
The solution is simple: don’t panic. Just wait for vCenter and ESXi to complete all their tasks. Restarting the ESXi host won’t help and could potentially make things worse. I decided to sleep and check again after a few hours, and everything was back to normal.