vCenter 6 fails to boot with LVM file system errors and needs fsck

If your vCenter server 6 has ever crashed or maybe after you performed an upgrade you are presented with a screen telling you that you need to run an fsck on the file system.  Now logically you run fsck against /dev/sda3 which is the root partition.  If you find that there are no errors on /dev/sda3 you might find yourself scratching your head and wondering what now.  You could go and try to check /dev/sda1 & /dev/sda2.  With no luck there the head scratching may become a bit more intense.  I found myself in this situation recently as well as a few other folks with no answer how to get this resolved.

In vCenter 6 you will notice there are now a number of LVM partitions and these are most likely the cause to your pain.  Below are the steps you can take to resolve the issue and get your vCenter back up and running.

 

  1. First you need to get access to the filesystem.  I like to do this by changing the grub boot parameters, I have better success this way.
    1. When the grub boot loader is up press space to stop the auto boot.
    2. The press “p” and enter your password if you didn’t set one it’s “vmware”.
    3. Next on the 2nd entry in the list press “e” for edit.
    4. Then on the 2nd entry again press “e” again to edit the line and add “init=/bin/bash” to the end of the line and press “enter”.
    5. Now press “b” to boot single user mode
  2. Once the console is up and running you need to mount your / partition in Read/Write mode.  You can do this by issuing the following command mount -n -o remount,rw /
  3. Now issue the following two commands:
    1. lvm lvscan
    2. lvm vgchange -ay
  4. Once you have run these two commands you can now run fsck against your lvm volumes.  As an example let’s say the volume with errors is log_vg-log.  You would issue the command fsck -y /dev/mapper/log_vg-log
  5. Once you have repaired all the effected partitions reboot and you should be good to go.

That’s it, you should now have a working vCenter server again.

Home Automation with vRealize Orchestrator and Wink

You might read the title and think to yourself ‘Why would I want to use vRO with Wink?”  Well there are a number of reasons.  I created this because being an automation specialist I thought it would be cool to automate my home.  When I started down this path I got a wink hub, a smartthing hub, a philips hue hub, Chamberlain MyQ Garage Door Openers, Kwickset locks, Leviton & GE switches, Light Bulbs, a Smappee Energy, Water, & Gas Monitor, Nest Thermostat, Nest Protect, EcoBee, Ring doorbell, Canary, Harmony Hub, and a number of other hubs, devices, and sensors.  As I started my project I realized on their own non of these products do a great job at automation.  Sure you can control things via na app, but I want more than that.   I don’t just want automation either, I want intelligent automation.

A simple example:  I want my door locks to be locked after a defined period of time being unlocked.  Well sure I can create a rule or robot that say lock door after x time, but that’s lacking intelligence.  Maybe I want to lock the door only if it is closed.  Non of these systems can do that.  However with vRO I can create a workflow that locks the door and checks the door sensor to determine if it is opened or closed and if it’s closed, lock the door, if not check again in x period of time until it can be locked.

Another example:  I park my vehicle in the garage.  I like to remote start my vehicle in the winter to warm it up.  I would sometimes forget to open my garage door then start my vehicle.  With vRO I can mount a Nest Protect on my garage door right behind my exhaust and set a rule that if CO is detected, open the garage door.  Alternatively I can use a OBDLink hooked up to my vehicle computer and through Dash determine if my vehicle is running and trigger garage door to open.  You get the idea.

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VMware vSphere 6 – Manually upgrading vSphere 6.0 to vSphere 6.0 Update 2 with ease

You have read all the announcements about vSphere 6.0 Update 2 being released and now you want to upgrade.  Maybe you haven’t tried out the embedded web ui and are tired on needing to use the thick client when your VC goes down.  Whatever the reason applying the update is pretty easy and straight forward.

Updating vCenter Appliance

First things first we need to upgrade vCenter to Update 2.  To do this manually you will first need to download the vSphere patch iso VMware-vCenter-Server-Appliance-6.0.0.20000-3634791-patch-FP.iso from myvmware.  Once you have downloaded the iso simply follow these steps to apply the update:

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VMware Sample Exchange beta

It dawned on me that you all may not be aware of the VMware Sample Exchange.  The sample exchange is a place where you can go to find samples shared by many different folks.  Some by VMware employees others by customers, and partners.  On the sample exchange you can share all sorts of things from sample code written in many different languages, vRO workflows, blueprints, and more.  With the ability to turn blueprints into code in vRA7 the sample exchange makes it possible to share those blueprints with others and the best part is it’s free!

I encourage all of you to participate.  The more of you that share your work the better this community will become for all.

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New author and guest authors on dailyhypervisor

I’m happy to inform everyone that dailyhypervisor has a new author that will be bringing you some great cloud management content.  Chris Lennon a very talented individual on the VMware National Software Defined Enterprise Solution Engineering Team.  Chris has expert knowledge in vRealize Automation, vRealize Operations,  vRealize Log Insight, vRealize Configuration manager, and more.   You can check out Chris’s bio here.

Dailyhypervisor is also getting some new guest bloggers as well.  I would like to also welcome Gary Coburn and Paul Gifford as guest bloggers who will also be posting articles related to cloud automation and the software defined datacenter.  Look for some great new content to from these great new contributors.