Build Your First Kubernetes Cluster on vSpheredl.geekboy.pro:8080/VMworld 2019/CODE1151UR.pdf ·...

#vmworld

CODE1151UR

Build Your First Kubernetes Cluster on vSphere with Kubeadm

Kenny Coleman, VMware, Inc.

#CODE1151UR #k8s #kubeadm #gokennygo

VMworld 2019 Content: Not for publication or distribution

©2019 VMware, Inc.

Disclaimer

This presentation may contain product features or functionality that are currently under development.

This overview of new technology represents no commitment from VMware to deliver these features in any generally available product.

Features are subject to change, and must not be included in contracts, purchase orders, or sales agreements of any kind.

Technical feasibility and market demand will affect final delivery.

Pricing and packaging for any new features/functionality/technology discussed or presented, have not been determined.

2

The information in this presentation is for informational purposes only and may not be incorporated into any contract. There is no commitment or obligation to deliver any items presented herein. VMworld 2019 Content: Not for publication or distribution

©2019 VMware, Inc. 3

Kubernetes

The focus is on orchestration

Kubernetes functions as a master/worker relationship. Master roles require availability of

it’s services to keep quorum and schedule containers on worker nodes. Kubernetes

master components are critical to the overall health of the cluster.


4©2019 VMware, Inc.

“Cool! Let’s Build Something”

- Every Engineer



Kubernetes is an abstraction layer that allows freedom for customization and tailoring for any platform. Run it in on your local machine, hosted in the cloud, turnkey cloud options, on-premises turnkey solutions, or completely custom to “do it yourself” (DIY).

ChoicesAnd choices and choices and choices



From The Kubernetes Documentation:

Best-practice “fast paths” for creating a minimum viable cluster.

Installing various nice-to-have addons, monitoring solutions, and cloud-specific addons, is not in scope.

Instead, we expect higher-level and more tailored tooling to be built on top of kubeadm.

Inference

Kubernetes is hard. Kubeadm is a tool that builds and upgrades clusters very well. The ability to operationalize Kubernetes beyond installation is dependent upon maturity of the organization.

KubeadmBuilt by the community for the community



From the Beginning…It all starts with the machine

Step 1.

Choose your distro:• Ubuntu, CentOS, CoreOS, SUSE, RancherOS, Talos Etc

Step 2.

Make your distro configurable as a template/AMI/etc. • Countless blogs with outdated methods?

• Will the template work with your environment? (ie Cloud Init vs Static IP)

• Process for updating templates

• Install Docker and Kubernetes components? Automate?

• Sizing requirements?



Installing KubernetesOr is there more research to do?

DOCS, BLOGS, AND MORE DOCS!

What container runtime do you want to use?

• Docker? Rkt? Or some other CRI compatible offering?

• Lessons learned from running Docker in production?

• What container runtime version is supported with the version of Kubernetes? What happens after yum install docker-ce?

Architecturally, single or multi-master? Stacked or separate etcd?

• Different paths in the docs

• Load Balancers, DNS, certificate sharing, and more to investigate



More research to weigh out the differences:

Is there an advantage to have overlay L2 vs L3?

kubeadm init requires special instructions for each solution.

What tools are available for troubleshooting?

How to manage at scale?

What is the scaling point?

NetworkingMore choices? Yes more!



Ready to Install?Not quite yet

Persistent Storage

Native in-tree driver to provide persistent backing for Kubernetes applications.

Continually evolving (API, process, plugin model)

Cloud/Provider Specific Configs and Initialization

Few examples of how to locate or properly configure flags on kubelet and manifests after cluster initialization

Few examples with kubeadm exist (even for major cloud providers)



The best install guide that’s still a work in progress

1. Creating an Ubuntu 18.04 LTS cloud image for cloning on VMware• Reliant on DHCP

2. Setting up K8s and the vSphere Cloud Provider using kubeadm• All the little details that seem to have not made it into the

actual docs. For both kubeadm and vSphere• Uses Flannel as the networking layer• Learn to automate from here

3. Using the vSphere Cloud Provider for K8s to dynamically deploy volumes• Storage Classes, apps, and the k8s dashboard.

Now Can We Install?Sure, Good Luck!

Credit to @myleasgray


https://blah.cloud/kubernetes/creating-an-ubuntu-18-04-lts-cloud-image-for-cloning-on-vmware/

https://blah.cloud/kubernetes/setting-up-k8s-and-the-vsphere-cloud-provider-using-kubeadm/

https://blah.cloud/kubernetes/using-the-vsphere-cloud-provider-for-k8s-to-dynamically-deploy-volumes/


Want to See It in Action?You’re really selling it here…

DEMO TIME!



Kubernetes Worker

Operationalize the entire stack

Logging

Monitoring

Dependency Management

Security

Upgrades

Automated Repeatability

Regression Testing

Support

There’s more than installationMove to Production?

App App

Kubernetes Control Plane

Kubernetes Worker

App App

Infrastructure



Create Dynamic HA (multi-master) clusters (Beta in 1.15)

kubeadm for Windows (Alpha in 1.16)

Advanced kubeadm Configuration to match more Kubernetes parameters

Advanced kubeadm Configuration using Kustomize

Kubeadm Roadmap



Get Started



Build your own vSphere ClusterClick to edit optional subtitle; delete or type a space if not needed

Kubernetes is complicated – use a pre-packaged solution that does this for you.

We recommend kubeadm for installation of kubernetes.

Stand up a cluster with kubeadm for free here: https://training.play-with-kubernetes.com/kubernetes-workshop/


https://training.play-with-kubernetes.com/kubernetes-workshop/


The best install guide that’s still a work in progress

1. Creating an Ubuntu 18.04 LTS cloud image for cloning on VMware• Reliant on DHCP

2. Setting up K8s and the vSphere Cloud Provider using kubeadm• All the little details that seem to have not made it into the

actual docs. For both kubeadm and vSphere• Uses Flannel as the networking layer• Learn to automate from here

3. Using the vSphere Cloud Provider for K8s to dynamically deploy volumes• Storage Classes, apps, and the k8s dashboard.

Automated Steps to Install Kubernetes on CentOS7 with Kubeadm and vSphere

• https://gist.github.com/kacole2/200ae9362b010480f866d82a363c5327

Build your own vSphere Cluster


https://blah.cloud/kubernetes/creating-an-ubuntu-18-04-lts-cloud-image-for-cloning-on-vmware/

https://blah.cloud/kubernetes/setting-up-k8s-and-the-vsphere-cloud-provider-using-kubeadm/

https://blah.cloud/kubernetes/using-the-vsphere-cloud-provider-for-k8s-to-dynamically-deploy-volumes/

https://gist.github.com/kacole2/200ae9362b010480f866d82a363c5327


Learn about the features of VMware Enterprise PKS

- https://www.vmware.com/try-vmware/pks-hol-labs.html

Try out our VMware PKS Hands On LabFREE VMware HOL


Build Your First Kubernetes Cluster on vSpheredl.geekboy.pro:8080/VMworld 2019/CODE1151UR.pdf ·...

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