ESXi 6.5 – 503 Service Unavailable

June 10, 2019 Jordansphere ESXi

Problem There was a storage issue which caused one particular in a 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 = […]

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ESxI gui 503,

Host profile apply failed with error: Error: A specified parameter was not found

June 3, 2019 Jordansphere ESXi

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 […]

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host profile error, host profiled apply failed,

NSX Alert: Possible DHCP DOS Attack on Host

April 1, 2019 Jordansphere ESXi

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 […]

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NSX Alert, Possible DHCP DOS Attack on Host,

Determine vCenter Build in 5.5

March 22, 2019 Jordansphere VMware

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 

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Remove Datastore from Datastore Cluster in vCloud Director

March 8, 2019 Jordansphere 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 […]

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datastore cluster, Remove Datastore, vcloud,

NSX Manager Disconnected from vCenter

March 6, 2019 Jordansphere NSX

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 […]

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Upgrade Zabbix from 3.4 to 4.0 with Pacemaker/Corosync

February 6, 2019 Jordansphere Linux

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 […]

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3.4 to 4.0, corosync, pacemaker, Upgrade Zabbix,

Zerto: VMDK Cannot Be Synced Because It Is Inaccessible

January 18, 2019 Jordansphere VMware

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 […]

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A General System Error Occurred. Failed to SSH connect to Peer Node

January 17, 2019 Jordansphere VMware

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 […]

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UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY

December 6, 2018 Jordansphere Linux

Problem A CentOS VM was rebooted but failed to start with the following error: /dev/ampper/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/ampper/VolGroup-lv_root 3 Reboot system # reboot  

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