JordansphereVMware
SSO Drift – The Authentication Server Returned Error
Problem In a Vsphere 6.5 environment running an external PSC we had an issue where the time occasionally drifted leaving users unable to login. The VCSA and PSC both synced with the same NTP servers but seems to occur now and again. Resolution To fix the issue, SSH to both VCSA and PSC […]
ESXi 6.5 – 503 Service Unavailable
Problem There was a storage issue which caused one particular host not to recover correctly. I was unable to login to the ESXi GUI and when I tried to restart the management services the GUI completely stopped functioning with the following error: 503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x03ff40e8] _serverNamespace = / action = […]
Host profile apply failed with error: Error: A specified parameter was not found
Issue: Running vSphere 6.7 I applied a host profile to a cluster. A couple of hosts didnt like the host profile so I decided to detach it entriely. I was still presented with the error: Host profile apply failed with error: Error: A specified parameter was not found Resolution There are two ways of […]
NSX Alert: Possible DHCP DOS Attack on Host
Problem Running NSX. 6.4.3. An error was keep appearing on one of our 6.7 ESXi hosts: NSX Alert: Possible DHCP DOS attack on host Resolution I believe this is a false positive from a bug in 6.4.x To check if there are any issues log into the affected ESXi host and run the following […]
Determine vCenter Build in 5.5
To check the vCenter build: 1) via C++ Client Help -> About VMware Vsphere 2) Via Web Client Home -> Vcenter -> vCenter Servers -> {Select vCenter server} -> Summary
Remove Datastore from Datastore Cluster in vCloud Director
Current Setup vCloud Director : 9.1 vSphere: 6.5 We have a datastore cluster with 2 datastores inside. As you can seee there are two datastores. saneql01-01 is the datastore I want to remove and is showing as empty Note: The official recommendation was to "remove the tag in vCenter and […]
NSX Manager Disconnected from vCenter
Problem We noticed NSX Manager had become disonnected from both the lookup service and vCenter Troubleshooting Check Connectivity From NSX Manager # debug connection {IP_of_vCenter} PING 10.63.240.1(10.63.240.1): 56 data bytes 64 bytes from 10.63.240.1: icmp_seq=0 ttl=64 time=0.205 ms 64 bytes from 10.63.240.1: icmp_seq=1 ttl=64 time=0.134 ms 64 bytes from 10.63.240.1: icmp_seq=2 ttl=64 time=0.096 ms […]
Zerto: VMDK Cannot Be Synced Because It Is Inaccessible
Problem After upgrading vSphere 6.5 to 6.7 U1 the VPG I was protecting failed witn the error: VMDK cannot be synced because it is inaccessible Troubleshooting The vsphere user (linked to AD) account used with zerto had access to the DS I was already using Zerto 6.5 U2 -which was the first release that supported […]
A General System Error Occurred. Failed to SSH connect to Peer Node
Problem A general system error occurred. Failed to ssh conenct peer node xxx.xxx.xxx.xxx vCenter: 10.34.59.1 Peer: 10.34.59.2 Witness: 10.34.59.3 Troubleshooting SSH is enabled on the primary VC (10.34.59.1) The peer deployed correctly and I could ping it via the HA link using HA IP addreses. However, I could not telnet on port 22 to […]
Change Default Gateway of NSX Controller
Problem A default gateway on the IP Pool servicing the NSX controllers had been mistyped during installtion. I needed to change this so my montioring system could route traffic to the 3 controllers. Versions: NSX .6.4.3 vCenter 6.7 Caveats NTP Server was on a different subnet so current controllers could not route to […]