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 = Read More…
Author: Jordansphere
I currently work for an ISP on the South coast as a Senior Engineer. I mainly spend my time maintaining the Cloud. CCNA, VCP4/5, VCP-Cloud
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 Read More…
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 Read More…
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 Read More…
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 Read More…
Upgrade Zabbix from 3.4 to 4.0 with Pacemaker/Corosync
Here are the instructions for upgrading Zabbix from 3.4 to 4.0 in a HA setup in a Pacemaker and Corosync environment. In this particular setup there are 6 servers – depicted below Two web front ends Two Zabbix Servers Two DB servers Steps Pre-requisite: As this was running in a VMware environment I snapshotted each Read More…
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 Read More…
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 10.34.59.2 Resolution Read More…
UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY
Problem A CentOS VM was rebooted but failed to start with the following error: /dev/mapper/VolGroup-lv_root: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY Solution 1) Enter CLI {Enter root password} 2) Run filesystem check . In my case. # fsck -y /dev/mapper/VolGroup-lv_root 3 Reboot system # reboot
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