If you had installed your RHEL/CentOS 5 system using LSILogic Parallel controller, you may have noticed the horrible I/O performance… You unfortunately cannot just change the controller type and expect your VM to boot. There is a few easy steps to ensure that the OS can boot with the new controller. FIRST thing FIRST :… Read More »
If you just have reconfigured your virtual machine hardware in vCenter and can see that the status is stuck at “In progress…” for a while (much longer than usual, even though waiting 30 minutes for something that should normally take 5 seconds), then you may be facing the bug I have seen in vCenter version… Read More »
Having the following error trying to apply IP restriction in the ESXi firewall using the vSphere client? Call “HostFirewallSystem.UpdateRuleset” for object “firewallSystem” on ESXi “0.0.0.0” failed. Operation failed, diagnostics report: Sysinfo error on operation returned status : Already exists. Please see the VMkernel log for detailed error information This behaviour can happen under the following… Read More »
The following error may occur if you have requested a VM to be deleted from disk : A general system error occured: Input/output error In my particular case, the VM was up to 12 Tb and after a little while the operation was running, the error message above showed up in vCenter. The virtual machine… Read More »
The following error is usually represented by a “pink screen of death” with the following output : PCPU 0 locked up. Failed to ack TLB invalidate. @BlueScreen: PCPU 0 locked up. Failed to ack TLB invalidate. NMI IPI received. Was eip(base):ebp:cs [0x76a42(0x41802f800000):0x412520x4010](Src 0x1, CPU2 The cause is that when interrupt occur, a context switch must… Read More »
I recently had the following issue in vCenter : A non-existent network still associated with a virtual machine but marked as inactive. The VM has no longer any network interface mapped to that network but it still show in the network map and the VM overview. It turned out that a snapshot for this VM… Read More »
Having the following error trying to connect to the VMware vSphere Web Client? 503 Service Unavailable (Failed to connect to endpoint: [class Vmacore::Http::LocalServiceSpec:0000000002D9B4A0] _serverNamespace = /vsphere-client _isRedirect = false _port = 9090) This is usually caused because the “VMware vSphere Web client” service has stopped unexpectedly or not started on boot. This service is and… Read More »
Having the following notification after adding a new VMFS volume to your VMware vSphere/vCenter 6? Deprecated VMFS volume(s) found on the host. Please consider upgrading volume(s) to the latest version. If this message show up even though they are at the latest version, it mean you have hit a known issue of vCenter 6 (which… Read More »
Having this error message trying to open a virtual machine (guest) console? The VMRC Console has Disconnected. Trying to reconnect This is probably because either your host or vCenter server does not have the necessary ports opened or filtered. You should have the following port opened on the firewall : tcp-443 tcp-902 tcp-7331 tcp-9443 (vCenter… Read More »
VMware ESXi hypervisor have some great SNMP capability, whatever to gather information status of your hardware, monitoring or statistic usage of your resources. Follow these easy steps to enable such feature. 1. Enable SSH from the vSphere client and connect to it using your favorite terminal application : Configuration tab > Security Profile > Services >… Read More »