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ssh

VMware Cloud FoundationVMware NSX

NSX Manager Repository High Disk Usage

by Tommy Grot
written by Tommy Grot 1 minutes read

If you’ve recently upgraded your NSX environment and noticed a spike in disk usage for the repository partition, you’re not alone. In this blog post, we’ll dive into the reasons behind this increase and provide some tips on how to manage and optimize your disk space. We’ll discuss common causes for the surge in disk usage post-upgrade, and explore some best practices for keeping your NSX environment running smoothly.

VMware Cloud Foundation (SDDC Manager) Password Lookup Utility

Next, we will need to SSH into the NSX Managers, if you are running NSX within VMware Cloud Foundation, you will need to run the VCF Lookup Password Utility within the SDDC Manager and login via remote console in vSphere to enable SSH services

To Start SSH Service on NSX Manager –

start service ssh

To Enable SSH Service on reboot –

set service start-on-boot

There is the 84% Usage of the repository partition, this partition holds all the previous patches and upgrades of NSX.

Now we delete the old folders, I also had old version of NSX Advanced Load Balancer which I cleaned up as well.

Example –

rm -rf 4.1.2.1.0.22667789/

There we go! No more alarms for high disk usage.

After a upgrade of your VMware NSX environment, it is always good to clean up the bundles and old binaries to prevent high disk usage and prevent and issue with your NSX Managers.

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VMware Troubleshooting

vSphere ESXi Dump Collector

by Tommy Grot
written by Tommy Grot 2 minutes read

If you have any issues or errors that occur within the ESXi Hypervisor, the ESXi Collector will send the current state of the VMkernel Memory. This will dump the core to the vCenter via network. So if a ESXi host fails or gets compromised there will be traces of sys log and other logs sent to the vCenter Serve which could be in the same organization datacenter or reside somewhere else in the cloud.

Cyber Security Tip! – DISABLE SSH after you are done working with it, this is strongly recommend to harden the ESXi host and prevent any cyber attacks against SSH (Port 22)

The ESXi Dump Collector traffic is not encrypted so best practice is to set it on a isolated VLAN that the internet or other networks do not communicate with it.

First step, is to log into VMware Server Management, also known as, VAMI.

https://YOUR_VCENTER_IP_OR_DNS:5480/

The login credentials to log into VAMI

Username : root

Password : The Password you setup during installation.

Once you are logged into VAMI, you will need to go to the Services section. Then look for VMware vSphere ESXI Dump Collector.

Select it, and click START

After the VMware vSphere ESXi Dump Collector is started and running, log into your ESXi host(s) via SSH.

To enable SSH on the cluster, login your vCenter, then go to the ESXi host, Click on Configure -> System -> Services. You will see SSH, click on that and select START.

Once SSH has started, open up your favorite SSH tool, for this tutorial I am using Putty. You may download it here.

Then log into the ESXi host and you will execute few commands to enable the ESXi host to offload the VMkernel logs to the vCenter Dump Collector.

esxcli system coredump network set --interface-name vmk0 --server (YOUR vCENTER IP) --server-port 6500
esxcli system coredump network set --enable true
esxcli system coredump network get

After all those 3 commands are executed with your specific vCenter IP, you will see that the final command will get the coredump network configuration and display it in the SSH session. Once that is enabled you will see that the Alert for ESXi Core Dumps log go away and logs are offloaded.

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