Skip to main content

NetApp Cloud Insights Preview, Part 4: Troubleshooting



Thank you for tuning in once again to my blog series on NetApp Cloud Insights. If you haven't seen the previous entries, here are some links:


In this post, I'm going to cover a really straightforward troubleshooting workflow that you can do within Cloud Insights to help you zero in on the root cause of some VM latency.  We'll start by searching for an asset (a VMware virtual machine in this case) from the search bar at the top of the Cloud Insights dashboard.



We can see a bit of increased latency beginning at approximately 12:00AM that we want to take a look at. On the right-hand side of the screen, Cloud Insights has identified other objects that it believes are correlated with the asset in question. The top correlated object, for example, is the VMware datastore where the VM is located. If we click the checkbox next to the datastore asset, it'll stack the chosen metrics (latency and IOPs for this example) on top of the existing values for the VM. 


You can see from the data above that there is a pretty good chance that increased I/O on the VMware datastore caused the VM latency to increase. 

In this particular case, the SnapMirror schedule for this volume starts at 12:00AM, so this behavior is expected, but it serves to illustrate how useful the data can be for troubleshooting. 

If you notice down in the lower-right, there is a section called "Greedy" - these are resources that are reporting higher-than-normal amounts of IOPs and may be impacting other workloads. It's not shown in the picture, but there is also a "Degraded" section if a troublesome workload is impacting other workloads negatively. 

It's pretty cool how you can layer all this data from multiple systems collected by Cloud Insights together and use it for root cause analysis and troubleshooting with just a few clicks.

This concludes the series on Cloud Insights, but please don't think that what I've covered here is the sum total of what Cloud Insights has to offer - it does SO MUCH more for public cloud monitoring, cost reclamation estimating, VM right-sizing, and more. As you may be aware, Insight 2018 US just wrapped up, where Cloud Insights was officially announced. So if these posts have piqued your interest, head out to cloud.netapp.com and sign up for a free trial of Cloud Insights and see for yourself. 

Thank you for reading!

Popular posts from this blog

How To: Unjoin NetApp Nodes from a Cluster

Let me paint you a word picture:

You've upgraded to a shiny new AFF - it's all racked, stacked, cabled and ready to rock. You've moved your volumes onto the new storage and your workloads are performing beautifully (of course) and it's time to put your old NetApp gear out to pasture.

We're going to learn how to unjoin nodes from an existing cluster. But wait! There are several prerequisites that must be met before the actual cluster unjoin can be done.


Ensure that you have either moved volumes to your new aggregates or offlined and deleted any unused volumes.Offline and delete aggregates from old nodes.Re-home data LIFs or disable/delete if they are not in use.Disable and delete intercluster LIFs for the old nodes (and remove them from any Cluster Peering relationships)Remove the old node's ports from any Broadcast Domains or Failover Groups that they may be a member of.Move epsilon to one of the new nodes (let's assume nodes 3 and 4 are the new nodes, in th…

ONTAP Configuration Compliance Auditing with PowerShell and Pester

I have been looking for a way to validate NetApp cluster configuration settings (once a configuration setting is set, I want to validate that it was set properly in a programmatic fashion) and prevent configuration drift (if a setting is different than its expected value, I want to know about it). I needed it to be able to scale out to dozens of clusters as well, so it needed to be something that I could run both automatically and on an ad-hoc basis if necessary.

NetApp PowerShell Toolkit

The core of the solution is the NetApp PowerShell Toolkit, without which this would likely not be possible. It contains 2300+ cmdlets for provisioning and managing NetApp storage components. It can be downloaded from the ToolChest on the NetApp MySupport site (with a valid login). You'll find exhaustive documentation there as well for each of the cmdlets along with syntax examples and sample code. It is a fantastic and easy way to automate common storage tasks - we use it in our environment for e…

Step up your HTTP security header game with NetScaler Rewrite Policies

There are a number of HTTP response headers that exist to increase web site security. If set properly, they can ensure that your site is less exposed to many common web vulnerabilities. By no means are these descriptions exhaustive, so I have included some references that can provide a more in-depth explanation at the bottom of each section. I'd also like to give a shout-out to the OWASP Secure Headers Project and Scott Helme of securityheaders.com - thank you!

Note: Screenshots are from a NetScaler VPX 12.1 - if you are running a different version, the screenshots may look different, but the logic is the same. So that I have something to bind these policies to, I've also already created a load-balancing virtual server named lb_web_ssl and a Service Group for two TurnKey LAMP servers on the back-end.

X-Frame-Options
The X-Frame-Options header is designed to guard against clickjacking (an attack where malicious content is hidden beneath a clickable button or element on a web si…