• RobbieJ.Me

    Cloud, Applications and Software Engineering

    April 23, 2020
    New Mobile Home Lab Hardware.. Since posting a small teaser of the new home lab hardware on...
    New vSphere New Icon... This last year has been an incredible rollercoaster for Cloud Native at...
    It's VMworld Eurpoe time once again and as usual situated in the amazing city of Barcelonia....
    September 1, 2019
    Possibly the most exciting announcement coming from VMworld US 2019 was Project Pacific. Making...
  • Helpful Notes

    Mostly this part of my blog is helpful tips and reminders for myself.. perhaps you will find it useful too.

    K8S Shell

    I can never seem to remember how to run a quick pod shell for in cluster debugging. Here we go :

    kubectl run -i --tty --rm debug --image=busybox --restart=Never -- sh

    Details on k8s.io of course - get-shell-running-container  or the new and exciting k8s 1.8 ephemeral containers

    K8s Node Sizing & Pod Sizes

    Getting tripped up by having a pod unable to be scheduled due to resource constrains is a pain, and in my world often a result of mis-configuration rather than a real constraint. Especially when considering VM backed K8S clusters.

    kubectl describe node / kubectl describe pod / kubectl describe deployment

    get the details of the various constraints and map them back to VM configuration. Remember to let the hypervisor do its magic with resource management on the physical hardware and not double the 'reservation headroom' by allowing 20% cpu overhead on the VM then on the K8S cluster.

     

  • Current Useful Links

    Helpful places on the internet mostly for my memory.. perhaps useful to others.

    BitFusion - ML & GPU's

    A small tagline

    Quick overview of the VMWare Bitfusion technology and how it can scale across multiple K8S nodes sharing GPU resources. Very cool stuff.

  • About.. well me.

    Hello world....

    Robbie J

    Emerging Technology, Photography, Scuba Diving and Software Engineering.. that's me.

    Grew up on ZX Spectrums, Amstrad 464's, Commodore Amiga's, X86 Linux and PowerPC Mac's... I've always been a computer nerd.. then it became my job.. the best job in the world*

     

     

     

    *I suspect there are better more fulfilling jobs.. I just don't look up from the keyboard long enough to notice them.

     

     

  • Twitter is where my brain mostly finds interesing things..

    and I like to share..

All Posts
×