DefinIT Because if IT were easy, everyone would do it…

4Apr/140

Book review: Networking for VMware Administrators

Posted by Sam McGeown

NetworkingForVMwareAdministratorsI recently got my hands on a copy* of Chris Wahl and Steve Pantol’s Networking for VMware Administrators and was very keen to read it – especially given the reputation of the authors. I came to the book as someone who is at CCNA level (although now expired) and someone who regularly designs complex VMware networks using standard and distributed switches. I would class myself as having a fairly decent understanding of networking, though not a networking specialist.

The book starts out at from a really basic level explaining OSI, what a protocol is etc. and builds on the foundation set out as it progresses. Part I of the book gives are really good explanation of not only the basics of networking, but a lot of the “why” as well. If you’ve done CCNA level networking exams then you will know most of this stuff – but it’s always good to refresh, and maybe cover any gaps.

Part II of the book translates the foundations set out in Part I into the virtual world and takes you through the similarities and differences with between virtual and physical. It gives a good overview of the vSphere Standard Switch (VSS) and vSphere Distributed Switch (vDS) and even has a chapter on the Cisco 1000v. One of the really useful parts of the book are the lab examples and designs, which takes you though the design process and considerations to get to the solution.

1Apr/140

Some useful vSphere related diagrams

Posted by Simon Eady

VMware.jpgOne of the things that never fails to amaze me are the superb PDF diagrams I occasionally stumble upon so i thought it would be a useful idea to list some of the the ones I have found on my travels.

VMware vSphere 5 Memory Management and Monitoring diagram

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2017642

2017642_vSphere5MemoryManagementDiagramv1-2

 

 

 

 

 

 

Concepts and best practices in Resource Pools

http://federicocinalli.com/blog/item/194-concepts-and-best-practices-in-resource-pools#.Uzre1_ldV8F

conceptsandbestpractices

 

 

 

 

 

 

6Mar/140

Installing VMware Site Recovery Manager (SRM) 5.5 in the Lab

Posted by Sam McGeown

Site Recovery ManagerI've been playing about with a compact SRM install in my lab - since I have limited resources and only one site I wanted to create a run-through for anyone learning SRM to be able to do it in their own lab too. I am creating two sites on the same IP subnet (pretend it's a stretched LAN across two sites) and will be protecting a single, tiny Linux web server using vSphere Replication. I'm aiming to cover SAN based replication in a later post.

Below is the list of hosts and VMs running for this exercise:

  • ESXi-01 - my "Protected Site" - this is running DC-01, VC-01, SRM-01 and VRA-01 (to be installed later)
  • ESXi-02 - my "Recovery Site" - this is running VC-02, SRM-02 and VRA-02 (to be installed later)
  • DC-01 – this is my domain controller, I’m only going to use one DC for both “sites” as I don’t have the compute resource available to have a second running. This is also my Certificate Authority.
  • VC-01 – this is my primary Virtual Center server, it’s a Windows 2012 R2 server. It is managing ESXi-01.
  • VC-02 – this is my “recovery site” and it’s a Virtual Center Server Appliance (VCSA). It is managing ESXi-02
  • SRM-01 - “protected site” SRM server, base install of Windows Server 2012 at this point
  • SRM-02 - “recovery site” SRM server, base install of Windows Server 2012 at this point
  • WEB-01 - this is a really, really, basic Ubuntu web server I've deployed from a template to use for testing.

Right - without further ado, let's get stuck in!

3Mar/140

VCSA 5.5 Web Client fails to log on with “SSL certificate verification failed”

Posted by Sam McGeown

This had me scratching my head, what seemed to be a common problem wasn’t fixed by the common solution. It was actually my fault – too familiar with the product and setting things up too quickly to test.

I installed a VCSA 5.5 instance in my lab as a secondary site for some testing and during the process found I couldn’t log on to the web client – it failed with the error:

Failed to connect to VMware Lookup Service https://vCVA_IP_address:7444/lookupservice/sdk - SSL certificate verification failed.

There are several VMware KB articles about this (2033338 and 2058430) which point to regenerating the SSL certificate as the solution to this – unfortunately in my case it didn’t seem to work.

I had a closer look at the certificate being generated and noticed that the Subject Name was malformed “CN=vc-02.definit.loca” – that led me to the network config of the VCSA. I’d entered the FQDN into the “host name” field, which was in turn being passed to the certificate generation, truncated and throwing the SSL error. Changing the FQDN back to the host name “VC-02” and regenerating the certificate resolved the issue.

If you do have to follow that process, remember to disable the SSL certificate regeneration after it’s fixed – otherwise you’ll suffer slow boot times!

I’ll put that one down to over-familiarity with the product!

12Feb/140

VMware vSphere Mobile Watchlist released

Posted by Simon Eady

For those of you unaware VMware recently released the VMware vSphere Mobile Watchlist

What does it do?

"VMware vSphere Mobile Watchlist allows you to monitor the virtual machines you care about in your vSphere infrastructure remotely on your phone. Discover diagnostic information about any alerts on your VMs using VMware Knowledge Base Articles and the web. Remediate problems from your phone by using power operations or delegate the problem to someone on your team back at the datacenter."

Features include..

  • REMEDIATE REMOTELY
    Use power operations to remediate many situations remotely from your device.
  • VMS AT A GLANCE
    Review the status of these VMs from your device including: their state, health, console and related objects.

I have been using it for a day or so and I have found it very useful, presently I have it installed on my Android Phone and Tablet.

If you consider using this in conjunction with VPN or whatever your preferred secure method to connect to your work LAN when you are "out and about" its a great way to quickly take a look at any problematic VMs without needing to fire up your laptop.

Its available on Android and iOS and is well worth a quick look.

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