PodCTL - Enterprise Kubernetes

Latest Episodes:

PodCTL Basics - How to Containerize an Application Sep 13, 2017

Show notes

Show Overview: Brian and Tyler discuss the basics of how an application gets into a container, how to layer OS + applications + dependencies, how a container interacts with a container registry, and how container files different from Kubernetes manifests.
Show Notes:

Topic 1 - How does a Container know what application to run?

Metadata
Image Layers

Topic 2 - Can any Application run in a Container? Does it have to be modified?

User namespace vs. Root
Resource requirements

Topic 3 - How does a Container interact with a Container Registry?
Topic 4 - How does a Container tell Kubernetes about it’s Application needs (HA, Static IP, Storage, etc.)?

Pods and Manifests

Topic 5 - Can a Containerized Application interact with other applications? How?

Within a Cluster
DNS Services / Networking
Kubernetes Services
Service Discovery frameworks

Feedback?

Email: PodCTL at gmail dot com
Twitter: @PodCTL
Web: http://podctl.com

Understanding the Cloud Native Ecosystem Sep 11, 2017

Show notes

Show: 5
Show Overview: Brian and Tyler talk with Chris Aniszczyk (@cra, CTO/COO of CNCF, Executive Director of OCI) about the Cloud-Native Ecosystem, if there is a CNCF "stack", the CNCF process for project acceptance, and the growth vs. hype of Kubernetes.
Show Notes:

[TRANSCRIPTION] PodCTL #5 - Understanding the Cloud-Native Ecosystem
Cloud Native Computing Foundation (CNCF) Homepage
CNCF Landscape
Open Containers Initiative (OCI) Homepage
KubeCon & CloudNativeCon - Austin, TX (Dec.6-8)

News of the Week

Interview with Chris Aniszczyk
Topic 1 - Welcome to the show. What hats do you wear at both the CNCF and OCI?
Topic 2 - How do the CNCF projects and OCI projects work together? (example: why is rkt or containerd in the CNCF and not OCI?)
Topic 3 - What is the role of the CNCF?

Is there a CNCF stack?

Can you talk about how projects get engaged with CNCF and the process of “official” vs. “incubation”, etc?

Will it ever make sense to have a “certification” program for CNCF-associated offerings, or does that create too much overhead?

Topic 4 - With so many projects being created, in different parts of the stack, where do you potentially see the next “official” projects coming from?
Topic 5 - Can you give us your perspective on some of the noise recently around Kubernetes?
Community Question of the Week:
Q: My company runs mostly pre-packed Windows applications. Is there anything that we can do with Containers or Kubernetes to help them?
Feedback?

Email: PodCTL at gmail dot com
Twitter: @PodCTL
Web: http://podctl.com

PodCTL Basics - Linux Containers Sep 07, 2017

Show notes

Show Overview: Brian and Tyler discuss the basics of Linux containers.
Show Notes:

Segment 1 - What is a Linux Container?

Filesystem + Metadata (JSON)

Segment 2 - How do Linux hosts interact (and isolate) Linux Containers?

Host OS vs. Container OS
Container isolation
Container security 101

Segment 3 - How does a container interact with Networking and Storage?

Pass-thru host details
CNI - Container Native Interface
Native container networking
Storage Volumes (static & dynamic)

Segment 4 - Can any Application run in a Linux Container? Does it have to be modified?

User namespace vs root
Resource requirements

Feedback?

Email: PodCTL at gmail dot com
Twitter: @PodCTL
Web: http://podctl..com

All the Tools in the Kubernetes Toolbox Sep 04, 2017

Show notes

Show: 4
Show Description: Brian and Tyler discuss the broad range of tools that are available to deploy, operate and manage Kubernetes environments. There are lots of options...

Show Notes:

Segment 1 - [News of the Week]

VMware, Google and Pivotal announced a packaged version of the Kubo project, called Pivotal Container Service (PKS).
CNCF continues to be the center of Enterprise IT with VMware, Pivotal joining

Segment 2 - Why do Open Source Projects often end up with so many installers?
Segment 3 - What are some of the common types of tools for kubernetes installations?

Install on your laptop (e.g. Minikube, Minishift, etc.)
Public Services (OpenShift Online, GKE, Azure Container Service, etc)
Quickstart installer on a public cloud (e.g. Heptio, DO, kops, etc.)
Kubernetes-specific installers (kubeadm, kubicorn, kargo, etc.)
Deployment scripts and variations on “runbooks” (e.g. Ansible, Chef, Puppet, etc.)

Segment 4 - What are some of the Day 2 tools that are used with Kubernetes?

Upgrade tools (e.g. 1-click, Operators, etc.)
Monitoring & Management (e.g. Prometheus, Datadog, New Relic, Zabbix, SysDig, CoScale) - https://blog.openshift.com/monitoring-openshift-three-tools/
Logging (e.g. EFK, Loggly, etc.)
Application Frameworks - Save that for future shows!

Feedback?

Email: PodCTL at gmail dot com
Twitter: @PodCTL
Web: http://podctl.com

Making Sense of Container Standards Aug 28, 2017

Show notes

Show: 3
Show Description: Brian and Tyler talk with Vincent Batts (@vbatts, Principle Software Engineer in the Office of Technology for Container Architecture at Red Hat) about the state of container standards - OCI, containerd, Moby, Linux vs. Windows containers, etc.

Show Notes:

Segment 1 - News of the Week

Red Hat and Microsoft announce partnership around Windows Containers and OpenShift and Azure, plus much more.

Segment 2 - An Interview with Vincent Batts

Topic 1 - Welcome to the show Vincent. Tell us what types of things you work on in the container community.
Topic 2 - 2yrs ago, there was docker and rkt arguing about container standards, and the OCI emerged. Can you give us an update on where container standards are today?
Topic 3 - What is this new concept called CRI-O, and how does it relate to Kubernetes?
Topic 4 - Containers always used to be Linux-specific, but we’re starting to hear more noise around Windows containers. Is this Microsoft specific, or are standards groups working on this too?

Segment 3 - Question(s) of the Week

Q1: What’s the difference between the Host OS and the Container OS, and do they need to be the same?
A1: A Comparison of Linux Container Images

Feedback?

Email: PodCTL at gmail dot com
Twitter: @PodCTL
Web: http://PodCTL.com

PodCTL Basics - What is Kubernetes? Aug 21, 2017

Show notes

Show: PodCTL Basics #1
Show Overview: The basics of Kubernetes.

Show Notes:

Segment 1 - What is Kubernetes?

Technology that spawned from Google’s internal “Borg” system for running application in containers.
Open source project donated to the CNCF in 2015.
Open source community of 1500+ engineers working on various sub-projects that make up the Kubernetes system.

Segment 2 - How does Kubernetes work?

etcd
Kubernetes API
Kubernetes scheduler
Kubelet on each worker machine
Controllers

Segment 3 - What’s the relationship between Kubernetes and Containers?

Containers describe what application bits run on a machine
Kubernetes is the framework that places containers on machines and ensures that the containers run in a well-defined manner (start/stop, highly available, load-balanced, etc.)

Segment 4 - Are there alternative technologies that work similar to Kubernetes?

Kubernetes is ultimately a framework that schedules containers
Mesos Marathon
Docker Swarm
Nomad from Hashicorp
Lots of homegrown, DIY systems, mostly based on scripting

Segment 5 - How can a company get Kubernetes or use Kubernetes?

Use the Open source software from the Kubernetes community
Use commercially available distributions of Kubernetes from multiple vendors
Consume Kubernetes-as-a-Service from multiple cloud providers

Feedback?

Email: PodCTL at gmail dot com
Twitter: @PodCTL
Web: http://podctl.com

Who has a Kubernetes problem? Aug 21, 2017

Show notes

Show Description: Brian and Tyler discuss some of the use-cases that businesses have for using Kubernetes. They review several public examples of Kubernetes uses, both in web scale and Enterprise environments.
Show Notes:

GitHub Goes All-In on Kubernetes (via TheNewStack)
KubeCon / CloudNativeCon CFP is Due August 21st

Segment 1 - Thank you for the great response to the initial show. Response has been very positive and we’ve already had like 8-10 people ask to be guests on the show. The challenge is to figure out what to do on show #2 or #3 since there is so much happening. So we’ve decided that for a while, we’re going to make sure that we cover all the fundamentals of containers and Kubernetes.
Segment 2 - News of the Week

GitHub announces details of how they use Kubernetes
AWS does not announce a Kubernetes services at AWS Summit in NYC
KubeCon CFP is due by August 21st

Segment 3 - How are companies using Kubernetes?

daemonSets (instance on each node), replicaSets (specific # is always running), jobs (run to completion), statefulSets (stateful apps) vs persistent Volumes (stateful storage)
Kubernetes Job Openings
Customer sessions at Red Hat Summit
OpenShift Commons Gathering (videos)
Kubernetes Case-Studies

Segment 4 - How to Learn More

Free Kubernetes Training from CNCF
Kubernetes by Example (Michael Hausenblas)
How does the Kubernetes scheduler work? (Julia Evans)
Kubernetes the Hard Way (Kelsey Hightower)

Segment 5 - Question(s) of the Week

Q1: What’s the right way to install Kubernetes? There seem like too many options.
A1: Kubernetes: A Little Guide to Install Options

Feedback?

Email: PodCTL at gmail dot com
Twitter: @PodCTL
Web: http://PodCTL.com

3.6 Ways to Love Kubernetes Aug 11, 2017

Show notes

Show: 1
Show Overview: Brian Gracely (@bgracely) and Tyler Britten (@vmtyler) introduce the PodCTL podcast, discuss the latest news in the Kubernetes community, highlight the OpenShift 3.6 launch, and answers some frequently asked questions about Linux containers.
Show Links:

Show Notes

Topic 1: An Introduction to the new podcast and our hosts.
Topic 2: News and Updates from the Kubernetes and CNCF Communities
Topic 3: What's new in OpenShift 3.6 with this week's launch?
Topic 4: How can people learn more about OpenShift, or get hands-on experience?- Self-Paced Online Learning:

Learning Links:

Free Self-Pace Online Learning - learn.openshift.com
Free Cloud Tier: OpenShift Online
Locally on your laptop: MiniShift Topic 5: The hosts answer some frequently asked questions about Containers, Kubernetes and OpenShift - Question 1: Can you run a 3rd-party Container Registry with OpenShift? - Question 2: How should you run your containers (privileged, non-privileged)?

Feedback?

Email: podctl at gmail dot com
Twitter: @PodCTL
Homepage: PodCTL.com

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