Book Review: Bad Blood


Bad Blood – Finished this pretty fast.

I finished this book in about 1.5 weeks.  I had some airplane travel time but I was riveted.  I was appalled, saddened, and shocked at the same time.  The book is a true story about a company named Theranos founded by Stanford dropout Elizabeth Holmes that appears to have falsified and misled investors, partners, and even worse its end customers:  People who were hoping to get better health care.

What made me the saddest was that Elizabeth Holmes could have been what many people, including my own three daughters, could have looked up to.  A brilliant charismatic leader on the forefront of the world of tech and health care, breaking glass, and making huge improvements in society.  We’ve seen the tech mogul story repeated with Gates, Jobs, Musk, Ellison, Bezos, etc.  But they’re all white dudes.  As a culture in tech we are craving some serious diversity and we get more lip service than real results.  Perhaps the reason Holmes was able to fool so many people was that she filled that void.  Would she had had as much success if she were a dude?  What sort of different treatment would she have received?

The book shows that her one great skill was to share a vision and get powerful people to buy into that vision.  The other thing it proved to me was how important transparency is.  I’ve seen it so many places where people don’t want transparency because it exposes people.  I first felt this when we did peer programming with my startup company Sumavi.  I was exposed for what I knew and didn’t know.  It was just one other coworker but I remember there was no time to goof around or slack off.  There was no time to pretend I knew something when I didn’t. However, transparency makes you better and makes you perform better.  What if everyone knew what you were doing all throughout the day?  Would it shame you or make you feel proud?  With Holmes we learn that with that lack of transparency nobody in the company really understood what was happening.

Ironically, what aggravated me in the book was the focus on time at the desk.  Sunny and Elizabeth both kept a tally of who worked long hours.  I’ve been a huge proponent of life balance, and Cisco has been a great company to work for on that front.  But I’ve seen so many times where time at the office does not translate to productivity.  In fact, I am betting that deep focus for 4 hours trumps any of those 12-16 hour days.

Lastly, what shocked me in the book (but I guess it shouldn’t anymore) is guess who went to jail?  Nobody.  Nobody admitted any wrongdoing, and yet Sunny and Elizabeth are as free as you and me right now.  I don’t understand this mentality.  This is the same mentality our current president of the United States has:  Never admit you did anything wrong.  I hope this trend goes away.  Elizabeth idolized Steve Jobs and tried to imitate some of his mannerisms.  Having read this book and the account of Steve Jobs in Walter Isaacson’s biography, the one thing Holmes didn’t seem to get was the passion that Jobs had.  Isaacson talks again and again on how Jobs would get emotional and cry in front of different people cause he felt so strongly about certain things.  It’s hard to know from this book what Holmes really cared about.  And to me this is one of the saddest parts of the story:  Holmes never provided any information to Carreyrou, but instead tried to destroy and threaten him.  I would really like to have more of her side of the details, but I don’t think we’ll get that.  For now, we can just take the lesson that being honest is really a good idea.

Kubernetes contexts

Today we had to work on switching between two kubernetes clusters.  The commands of the day are:

It’s surprisingly not so simple.  Perhaps there are tools out there that people know of to make it easier?  What I’ve been doing is taking to ~/.kube/config files and concatenating them together.  As an example, my config file looks as follows:

Notice how we combine them together.  Then I can switch contexts using the commands above.  I’ll have ccp or bm.

2018 – What did I do this year?

Big things of course!

  • Took the whole family to Europe for 2.5 months.  This was the greatest.  Kids got such an education on this.  So happy we got to do this.  I worked with a lot of customers and internal Cisco people while over in Europe.  It was nice to finally be on their timezone to do this!
  • Rewrote the project including back end and front end.  We used this at a few banks here and there worldwide.  I did not do this alone and had lots of help.  I got to spend one week this year in Spain at the offices of one of the banks writing the code and making it work for them.  We added CentOS 7.5, RHV, ESX 6.7 and other operating system support.  I created some Ansible playbooks for this as well that we showed to a few customers.
  • Mentored several Cisco employees.  We worked in Prague for a week on building Windows support for KUBAM as well as all the backend fixes.  Really glad I got to be a part of that.
  • Kept up with our blockchain project!  I worked on this with Sana Abo helal the whole year.  We are just about finished.  Basically, its an IoT device system that allows you to subscribe to streaming feeds of other IoT devices using Ethereum.  I believe what blockchain is lacking is NOT another proprietary blockchain, but instead applications that can run on the blockchain.  Our Ashya project creates no new tokens and uses Ethereum as the way to subscribe.  We also make use of YOLO to send object recognition data to the subscribers!
  • DEVNETCoin.  This was a smart contract that I made for the Blockchain talks I do with Tom Davies.  We did this talk at Cisco Live EUR (Barcelona, Feb 2018), CodeMotion (Amsterdam, May 2018), Cisco Live US (Orlando, Jun 2018), and Cisco Live LATAM (Cancún, Dec 2018).  We are scheduled to do it again in Barcelona Jan 2019.  We are always adding things to it.  The last iteration we added the Metamask Web3JS libraries so people could buy the coins from their browsers if they had Metamask.
  • I spent a lot of time doing Kubernetes work for customers.  Mainly with the Cisco Container Platform.  Setting up a Hyperflex lab with ACI has been a lot of fun.  It’s still not 100% but there is lots to be proud of.  I wrote several articles on CCP including persistent volumes and integration with App Dynamics.  Trying to push the messaging on CCP has been a big push for me since September when I’ve really embraced it.  I’ll be delivering a 4 hour technical seminar on writing applications for on premise Kubernetes clusters in Jan 2019.  Yes of course you can come!
  • Helped Pete Johnson with the Fonk Apps Project.  This project may still be ahead of its time but I think if we work on it we’ll be able to have some interesting things for on-prem serverless activities.  I’m really pumped about writing applications this way.
  • Created a DEVNET sandbox lab on Tensorflow.  I guess we didn’t quite launch it, but we are very close!  I’ll be making sure it is up for the new year.
  • Education: Finished the Deep Learning specialization on Coursera!  Lots of work for this! Recertified the CCIE, and of course felt like I was learning something new like every day!  I worked on Minio, Kubernetes, Kubeless, Web3JS, Metamask, Keras, Tensorflow, Kafka,… feels like everyday I’m trying to figure out something new.  My ReactJS skills are better as are my python.  I didn’t do a lot of Golang this year unfortunately.  While Python is not my favorite it is still quite useful since UCS, ACI, and deep learning libs are all written in this language.

Blockchain, Kubernetes, and Tensorflow, oh my!  It’s not fair that I get to play with all the cool stuff.  I look forward to a very exciting 2019 and wish all you the best!



ESXi Kickstart and automated vCenter registration

I haven’t worked on VMware for a while but needed to work on a project to automatically install ESXi on a few servers.  I invented a tool called KUBAM that was originally for deploying Kubernetes on UCS Bare Metal (KUBAM) but have realized there are a lot of people that can benefit from the use of vMedia policy installations.  I’ve written a few articles on this method here and there.

When looking to deploy ESXi we had made the kickstart portion work perfectly and even upgraded it to 6.7.  However, when looking for information on how to automatically register the ESXi servers to vCenter after the installation was concluded the best we found was information from the legendary WIlliam Lam at VMware from a post in 2011.  Here we are 7 almost 8 years later still trying to accomplish the same thing.  The problem is the post was written in 2011 and ESXi updated the version from Python 2 to Python 3 and so parts of the script don’t work.  I’ve updated it in a dirty way to make it work and checked the code into the KUBAM project.  It could use some cleaning up to make it nice like William’s python.  I may do that as time goes on.  For now here is the code:

A few notes here:

  • urllib2 was split into different urllib packages so that is no longer included
  • The top line sets the default context to not do cert checks.  Usually I find in enterprise companies there are no certs so people just accept the cert even though there is no root authority.
  • I only have IP addresses for hostnames, but if you have DNS then you will probably want to add contents from William’s script.
  • I’m pretty lazy with this and not updating the logs.  I’ll probably go back and spend some time doing that in the future if I need to.

The code is found in the KUBAM project here.

To use this code, you can include it in your ESXi Kickstart file.  An example in the same directory is here.  Notice the key are the last lines:

We put the script (renamed in the ~/kubam directory of the installer.  Then as the machine boots up it grabs the file and runs the script registering itself.

The install is nice and without glamour.  It simply adds a new server to the cluster:

With my example I didn’t add another user account but I recommend it.  I also didn’t base encode the passwords but that is something you could do as well.



A brief history of on-prem serverless development

My colleague Pete Johnson, at Cisco has released a blog about a project called FONK.  I wanted to talk a little bit about why its important.

iOS Developers

Let’s first start back with the dawn of mobile application development.  Pretend you are an iPhone developer back in 2008.  You know Objective-C and you know how to make killer user interfaces and you make a fun game about dwarfs hunting butterflies. You release the game, the app is good, and you are happy.

As the game gets bigger you realize you’d like to add features to make it so certain parts of the game are stored in the cloud.  For example, you want to keep the all time highest score for all players who have ever played the game with their avatar name.  Bragging rights are cool, and you want your game to be cool.

The problem is, you don’t have any expertise in this.  You know how to write Objective-C but you don’t know how to manage servers.  In fact, you have probably never even installed an operating system in your life.  So even though someone may be really good at spinning up VMs and putting NGINX on it and running some back end ruby on rails code, that is more hassle than you want.  All you want is a backend that you don’t have to manage where the game can upload and retrieve all time highest player scores and display it.

To do this, you know you want a place in the cloud that accepts a JSON POST request to send the highest score and you want to be able to put a GET request to get the highest scores.  If you don’t know what POST or GET are, they are basic HTTP request methods.  Read more here.  You don’t want to manage servers, virtual machines, or even containers.  (Also, containers don’t really get popular until 2014 so we are still 6 years away from that).


What you want is a service.  And in 2008 if we wait a little bit until 2011 then we start to see two cool solutions emerge for us:  Firebase and Parse.  Firebase was bought by Google and still lives on but Parse was bought by Facebook and closed down.  Both of these two companies offered a Backend-As-A-Service for your applications.  Really cool.  Now you could just use their GUI and put in database calls and then call it with your mobile app.  You didn’t have to learn about managing VMs and all that.  It was great!

The other thing that people start to realize is that it is good to accompany a mobile app with a web page.  To make it consistent, it would be great if the webpage would call the same APIs as the mobile app.  That way you only need to maintain one backend that both the web and mobile app can call.  Great!  How to do that?  Remember we still don’t want to manage VMs, OSes, or even the stacks that run that.  Well it turns out that AWS has offered us static web page hosting on S3.

Static web page hosting on S3 doesn’t sound like something that would call APIs.  But let’s understand what it is.  Our dwarf game is now hiring a web developer who knows Javascript.  When you visit a website that has javascript, the javascript doesn’t run on that site.  Javascript runs on your browser.  What happens is your browser goes to the URL and the URL gives you static HTML files.  Some of those files are javascript, css, and html that execute on your browser.  So we can actually host this in a public S3 bucket, point people to go there and they download the code.  You get replication, durability, high availability and uptime for free!  Still no VMs, no containers, no operating systems.

Enter AWS

It is now 2014 and you are a smart person at AWS.  You see this Backend as a service trend start to come and realize you could make some more money.  You also notice that some of these backend as a service companies also call your own products like your databases.  You’re also worried about the threat of Google and Facebook entering the market and taking more of your customers.  What do you do?  You build a backend as a service by stitching together your own services.  The advantage you have at AWS:  You already have some well known database services: RDS, DynamoDB, etc.  You also own S3 and your customers are already using it for static pages.  You also own API Gateway which allows you to call S3 services on the backend but it needs something a little more powerful.  So how can you complete the picture?  You introduce AWS Lambda.

In December 2014 AWS introduced AWS Lambda and many people were puzzled by the idea of function as a service.  What good was it for?  Why would you want to call a function based on an event? If you keep in mind the entire architecture then you realize that AWS Lambda just completes the picture.  No VMs, no containers, no operating systems.  No expertise needed in running this.  Just put code in their GUI and off you go.  Since you already use S3 you can easily put your functions in AWS and you are golden.

Let’s realize that this way of running applications is not the right way for every application.  Remember our dwarf game is pretty simple.  We just want to store the high score and get and receive it.  We may chose to add user identities and logins later as well, and our app can handle that.  But at some point if the complexity gets too much on the back end we’ll have to hire a backend engineer.  But for now we can still run it all with javascript and put our backend on AWS lambda, API Gateway, and DynamoDB.


In 2014 something happened that probably wasn’t meant to.  Google introduced Kubernetes to the world and that was intentional.  After all, nobody was using their cloud and they wanted to make people realize that they could use containers on their cloud better than anyone else.  By open sourcing Kubernetes Google could make a splash and assert some dominance.  That was intentional.  But what wasn’t intentional was that when 2015 hit and Kubernetes 1.0 was released it actually started adding some parity between public clouds and private clouds.

Let me explain.  To have an AWS experience on Prem the best thing you could do was OpenStack or some other do it yourself project.  OpenStack was pretty complicated, to put it nicely.  There were very few orgs that successfully implemented OpenStack on prem and so many people kept migrating to the public cloud.  Kubernetes has been so impactful that companies that have tried to resist or compete against it have thrown in the towel and embraced it.  Check out the list:

  • Google: Offered GKE, the initial cloud based kubernetes platform
  • RedHat (now IBM): Completely threw away OpenShift PaaS code and built entirely on Kubernetes
  • Pivotal: Had their own solution but now pushes PKS
  • Azure: AKS Kubernetes offering
  • Amazon: AWS who resisted and offered several different ways to manage containers (ECS, faregate, etc) finally offered native Kubernetes with EKS.

Many of these organizations probably would have rather liked to own the solution but everyone is now a Kubernetes provider!  The way of the PaaS is dying.  They are morphing into opinionated Kubernetes services.

But the biggest impact of all, to me, was that it started giving parity between public clouds and private clouds.  The same Kubernetes platform that runs on AWS, GCP, Azure, PKS, could be run on your own data center on  your own bare metal servers.  You just leveled the playing field and made it easier for me to bring my apps back on prem.  (If I wanted to, but of course why would I?)  Well for the dwarf game developer, I have no need to go back on prem.  But if I’m a big enterprise with lots of space in my datacenter, this might look interesting.

Kubernetes is simple to install, and much easier to manage than OpenStack, but still has its challenges.  However, as enterprises mature, perhaps it won’t be so bad?  After all there are solutions now from vendors including Cisco that offer Kubernetes with enterprise support.

FaaS, Object Storage, NoSQL, Kubernetes

Back to the mobile app world.  When AWS lambda came out some people made a framework called serverless (check out  People thought this whole function as a service thing was pretty rad.  But now what makes it radder is we have  a solution to run it on our own data centers using just Kubernetes.

I worked with Pete a little on his FONK project by submitting some code samples for the Guestbook app running on Kubeless.  For a developer to not have to worry about creating Dockerfiles, Kubernetes YAML files, and being able to just write code and get it working it is very appealing.  This serverless business is still pretty cutting edge and even though we are 3 years from when AWS came out with Lambda, there is still a lot of buzz about it and people jumping into the space.  What I like about FONK is that it levels the playing field between what I can get on public clouds and private clouds.  Certainly many people would argue that using a private cloud is the only way to go, but I see great dangers in this.

  1.  I am not comfortable with a company as big as Amazon making even more money off of me and holding me hostage.  I know they are good. I’ve used their stuff. I just don’t
  2. At a certain scale it is more cost effective to run kubernetes on prem than running in any public cloud. Granted you must have the expertise
  3. I can get better performance on my own datacenter.  Sure if I have to burst, public cloud is great.  But for chugging apps, I like my on prem stuff.

You can entirely disagree with me and you could be right.  But just remember, in engineering it is always about tradeoffs.  It’s not wrong or right.  It’s what tradeoffs do you want.


Technical Details on Gas on Ethereum

I’ve been working over the last year off and on on different smart contracts.  What follows are some technical details I sent to some of my colleagues here at Cisco regarding gas price and gas limits.  Two important parts of Ethereum that are not understood very well: Units and Gas.


1 Ether in Ethereum is divisible up to 18 decimal units.  The smallest unit is called a wei.  Thus, 1 wei  followed by 18 zeros equals 1 ether.  So:
The other important unit to know is a gwei.  A gwei is halfway between 1 ether and 1 wei.

In solidity everything is stored in wei values.  There are no fractions nor decimals, we just work with integers.  So by having this long zero values provide a way to have decimals without having decimals.

There are several functions I’ve used in some recent test cases that use this conversion as it is much easier.  Here are some examples:

Essentially, the fromWei function lets you format a value from wei to something else, like ether.  The toWei let’s you convert from ether to wei without having to write out all the zeros.  In Ethereum we have this whole other BigNumber class to deal with.  BigNumber is the class that allows us to store these giant 18 digit numbers as well as manipulate them.   It’s important to understand the units before understanding how gas works.


Gas is a unit or number of steps to be execute for your contract. Gas has fixed number of units for a specific operation/computation, this is fixed by Ethereum community. For example to add two numbers EVM consumes it may consumes 3 gas units. You set a Gas Limit in your transaction to tell how many steps you are willing to take.  The unit of gas is not in Ether, Gwei, or Wei.  It’s just an integer representing a number of steps.

To get basic fees to get some idea of how much gas, note the following:

  • 32k gas to create a contract.
  • 21k gas for normal transaction
  • 200 gas * 1 byte of byte code.
  • Transaction data costs 64 for non-zero bytes and 4 for zero bytes
  • Constructor cost

See this response on Ethereum Stack Exchange.

The limit of computation per block is not constant. Miners can set this.

VALUE field – The amount of wei to transfer from the sender to the recipient, this is the value we are going to send to either another user or to a contract.

GASPRICE value, representing the fee the sender is willing to pay for gas. One unit of gas corresponds to the execution of one atomic instruction, Gasprice is in wei. Wei is a smallest unit. (1 wei = 10^-18 ether or 10^18 wei = 1 ether. Because it is quite high, we use gwei.  1 gwei = 1,000,000,000 wei.

Total cost of transaction is Gas Limit * Gas Price

Gas price fluctuates. During normal times:

  • 40 GWEI will always get you in next block
  • 20 GWEI will get you in the next few blocks
  • 2 GWEI will get you in the next few minutes.

Depends on what minors are willing to take.

To see the current price for a unit of gas you can run:

The new function in web3.js 1.0.0 (still beta as of this writing) requires a callback:

(the callbacks are always error, response in 1.0.0 so in the new stuff you’ll get two values printed in the console log)

This will be about 20 Gwei. Or you can look to see what the Gas price is at the ETH Gas Station. The current price shown at the ETH Gas station is 11 Gwei (std) and 9 Gwei (safe low).  Creating contracts seem to cost a little more.

In practice when we’ve created contracts we’ve seen that we can use the estimateGas function to tell how much for storing the bytes:

The callback function for the contracts we’ve been working on shows the gas limit (or amount of gas) is about 645234.  But this is only the cost of storing the contract code on the blockchain.  You need to add more gas limit for creating the contract, for passing parameters, etc.  We’ve found that by adding 80000 more to our gas Limit the contract goes through.

Bluetooth Speaker and Microphone on Raspberry Pi

If you want your own Jarvis from Ironman the first step is to have a computer that can listen to what you say and then talk back to you.  The software for that is the hard part but with some AI and RNNs we can get some pretty good functionality.  That comes later, so let’s first start up with the microphone and audio.  I am using a Raspberry Pi 3 and will now set these peripherals up.


I bought a basic USB microphone that cost me an outrageous $4.50.  After plugging it into the Raspberry Pi, we can test and use it.  First we see that it is there with:

To record something we will use this command to record 3 seconds of audio and take the input from the -D device plughw:1,0

This will output the test.wav file.  This file can now be played back when we setup our bluetooth speaker.

Bluetooth Speaker

My bluetooth speaker was a pretty cool model I bought for tunes while working out.  Turning it on and making sure its not connected to anything else I logged into the Raspberry Pi and entered the command:

I then entered the ‘scan on’ command (but didn’t have to) and a bunch of devices showed up.  I picked the one I wanted and got its mac address:

I then ran the commands:

The speaker then showed connected.  Now we know its there let’s try to set the system to use it. Running the command:

We get:

This is great because it shows the speaker is connected and ready to work.  Now we can play the wav file through this bluetooth speaker.  The default audio of the Raspberry Pi is set to play out of the analog jack.  So if we run:

It doesn’t play anything.  Changing the command we can specify the device to play through:

Here the mac address shown below is the mac address of the bluetooth device.  It plays but it is really staticy, so the recording isn’t may favorite.  To determine if its the microphone or the audio we simply play another file:

We can simplify this device configuration by adding it to the /usr/share/alsa/alsa.conf.d/20-bluealsa.conf.  We add the following at the end:

In the above I’ve just named my device “oontz” and put in my own MAC address of the device as well as a description.  Everything else should be the same for your setup.  Then we can run:

Now, to make this the default we can add a similar entry to the ~/.asoundrc file.  Mine looks like this:

It is similar to the previous entry, but we have named it pcm.!default.  Now when we play the wav file it will use this as the default:

Cool.  Default sound setup for bluetooth.  Persistent reconnect will be the next topic!



Kubernetes OnPrem Storage

Lately I came across a few bare metal servers in our lab and decided I would test some of my ideas on setting up a bare metal kubernetes cluster on these nodes.  I started thinking that if I were to do so I would need some persistent storage.  There were a few options I could choose from:

  • I could NFS mount to all the nodes a server that had a ton of disks in it.  I could also find an old NetApp array or something else in here that may do the trick.
  • I could use Cisco Hyperflex.  The only problem was that HX requires VMware or Windows, both are not options for me as I refuse to pay their licensing costs.
  • One project minio caught my eye as a great solution as I could get great object store on prem.  It is already managed by kubernetes so it becomes native storage.  I loved this idea.

As I started thinking more about this I realized how great the Kubernetes Storage Interface idea is.  Looking at Hyperflex, a lot of the heavy lifting done in the code is managing the nodes and installing the controllers.  Much of this Kubernetes gives you for free.  The future then of distributed storage that we’ve been getting from VMware with VSAN or HX, or Nutanix is looking more to me of a place that Kubernetes can dominate.

Another project that holds great promise to me is Rook.  Rook uses the idea of Kubernetes Operators to set up distributed storage including Minio and Ceph.  Operators become the expert in deploying and running these systems.

Examine what containers have done for software development:  A new way to easily distribute and run applications in consistent environments.  Now consider, by extension that Kubernetes is using some of that goodness to deploy infrastructure.  It used to be pretty complicated to setup and manage the lifecycle of databases, Kafka streams, or other services required by the applications.  Now, though, Kubernetes is making this easier for us.

I’ll be examining some of these ideas in some upcoming posts, but I’m pretty excited about what these new features enable us.

Finally, I’d say:  If you are a storage vendor or selling storage software, if you don’t have a kubernetes strategy, its time to start looking at it.  Not only will it increase your time to market, but it will make the upgrading, lifecycle, and maintenance of your storage system for free.  And I’m not talking about how Kubernetes can run on top of your storage, I’m talking about how your storage should be running inside Kubernetes.

Update:  Check out Rook / Ceph in action:

Docker based Jupyter Notebook on B200 M5 with Tesla P6

We have a fresh system, let’s install Docker.  Here we are using CentOS 7.5 and logged in as root.

First make sure your date/clock is correct, if not, fix:

Install Docker

Install NVIDIA Docker

Following the README we do:

The output of this command should give you something like the following:

We can now run the python notebook to get started with Tensorflow

This will give us a session.  The session will look something like this:

Take note of the token printed out above.  Yours will look different.  Since this is running on a server, we will open an SSH tunnel to be able to talk to the Jupyter notebook

We can now open our web browser to http://localhost:9999.  This will then redirect us to the :8888 port on the server.  This way we can access our machine.  It will ask us for a token.  Now we can put the token that was outputted when we started the docker container.

After entering the token we can go through the Jupyter Notebook Tensorflow tutorials.

Using Docker is a ton easier than installing everything on this server by hand.  We did omit some of the nvidia driver setup requirements found in my previous post.


Hands on with NVIDIA P6 and UCS B200 M5

Just got access to a new UCS B200 M5 blade!  My goal is to create a tensorflow lab on it.  Let’s get cracking!

It was installed with CentOS 7.5

cat /etc/redhat-release

Let’s make sure there is indeed a GPU:

Ok, now we need to get some drivers. We go to NVIDIA’s page, fill out the form and get some drivers for RHEL7.

While waiting for downloads, we make it so we can sudo without a password. Run sudo visudo and edit these lines:

Now let’s install the VNC server and some other packages we’ll need.  This will give us development tools and a remote desktop

Now let’s attach to it… hmm.  we can’t.  Is selinux running?

yep.  Let’s turn that off for now.  We don’t need this.  Use sudo to modify /etc/sysconfig/selinux

Have to reboot.  But first let’s install the driver:

edit /etc/default/grub to disable the nouvea driver.

load the new grub file

Add the nouvea driver to the blacklist by appending to (or creating in my case) /etc/modprobe.d/blacklist.conf

Back up the old stuff and make the new initrd

Now we reboot.

I installed the the 32 bit compatible libraries because diskspace is cheap and time is short.

CUDA Libraries

We want tensorflow with the CUDA libraries.  It makes tensorflow fast!  We get it by navigating to their page.  I downloaded the runtime one.

I answer the questions as follows:

Since all went well you will see the following output

(or at least something similar)

Now lets get the environment setup.  Append to ~/.bash_profile

(I’m using 9.2 as this is the version of cuda I’ve installed, it may be different when you install so change as updates come available.)

cuDNN Library

To download the cuDNN libraries you need to have an NVIDIA developer account.  You’ll have to login to the download site and download the Linux version

Here we are cuDNN v 7.2.1 with CUDA 9.2 as that is the library we used.


Installing Tensorflow

Install pip

Now we can install tensorflow:




Installing NVIDIA Drivers on RHEL or CentOS 7