Free GitOps Workshop + Intro to Kubernetes & GitOps

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January 12, 2021
Free Workshop
Intro to Kubernetes + GitOps
Mark Emeis, Principal Engineer, Weaveworks
David Harris, Product Manager, Weaveworks
Tamao Nakahara, VP of DX, Weaveworks

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Weaveworks is founded on open source
● Flux & Flagger (CNCF): GitOps and Progressive Delivery for k8s
● Cortex (CNCF): Distributed, Long-term-storage TSDB compatible
with Prometheus
● (and many many more projects!)
And now … Weave GitOps!
weave.works

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Speakers Help/Support
Mark Emeis
Principal Engineer
David Harris
PM, Weaveworks
Tamao Nakahara
VP of DX,
Weaveworks
Duration
90-120 Minutes
Browser
Safari copy/paste
shortcuts may not work
Using Zoom
Questions?
• Use chat (button: top
left corner of screen)
• Escape to exit full
screen
• “To Everyone” or “To
all panelists and
attendees”
Support:
https://support.zoom.us/hc/
en-us/articles/206175806-T
op-Questions
Troubleshooting
Use chat
If the issue is not easily resolved,
we ask that you follow along as
we demo the sample app.
Free GitOps Workshop

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👋 Welcome!
Agenda:
Intro to Kubernetes & GitOps
Weave GitOps overview
Weave GitOps Getting started
Follow along at weave.works/product/gitops-core/

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👋 Get started & Get connected 💬 🤝
1. Weave GitOps: weave.works/product/gitops-core/
2. Getting Started: Click on “Getting Started” link from
the above link
3. Need help? #weave-gitops slack at
https://bit.ly/WeaveGitOpsSlack

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Coming Up
Weave Online User Group
(https://www.meetup.com/Weave-User-Group/)
● Jan. 26: Free GitOps Workshop
● Jan 27: GitOps & Flux Refresher with Priyanka Ravi
● Feb 2: Get Started with Flux with Priyanka Ravi
● Feb 9: Free GitOps Workshop
● And many more…

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Intro to Kubernetes
and GitOps
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Mark Emeis
Principal Engineer for Weave GitOps
30+ years in the software industry
Working with containers and Kubernetes
for 5+ years
Twitter: @markemeis
GitHub: palemtnrider
mark.emeis@weave.works
Weave-community.slack.com: Mark E.

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Outline/Background
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● Intro to Kubernetes

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Outline/Background
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○ Container Clusters - The Modern Ops Stack for the Cloud

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Outline/Background
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○ Core API - Namespaces, Pods, Services

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Outline/Background
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○ Core API - Namespaces, Pods, Services, Events, Secrets, Conﬁg, …
○ apps, storage, coord., discovery, jobs, certiﬁcates, networking, RBAC

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Outline/Background
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○ apps, storage, coord., discovery, jobs, certiﬁcates, networking, RBAC, ...
○ Extending Kubernetes - CRDs, Controllers, Operators

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Outline/Background
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● Intro to GitOps
○ (Need something to wrangle all of that complexity)

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Outline/Background
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● Intro to GitOps
○ Cloud-Native Best-Practices for Kubernetes

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Outline/Background
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● Intro to GitOps
○ Git: Version-Controlled, Immutable Storage

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Outline/Background
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● Intro to GitOps
○ Git: Version-Controlled, Immutable Storage
○ Ops: Continuous Delivery, Declarative Conﬁguration, Automation

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● A platform for distributed applications
● Or A platform for platforms
● Or A modern cloud platform
● Or An Open-source platform for Operations
● Or A platform for hosting twelve-factor applications
What is Kubernetes?
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● A platform for distributed applications
● Or A platform for platforms
● Or A modern cloud platform
● Or An Open-source platform for operations
● Or A platform for hosting twelve-factor applications
What is Kubernetes?
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● Open source software managed by CNCF of the linux foundation
● Key components: Control Plane, API server, Data Plane, Workloads
What is Kubernetes?
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● Standard framework w/ Conformance Testing
● Diﬀerent experiences are possible, depending on:
○ Self-hosted (on-premise) vs. Managed Kubernetes
○ Environments Dev/Test users / vs. for Production infrastructure
● Mostly same experience across all cloud providers
What is Kubernetes?
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● Key concept - “Desired State”
● Declarative conﬁguration - what not how
○ eg. Deployments of containerized apps
● Controllers drive the actual state toward desired state
What is Kubernetes?
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● Pod
○ kubectl run --image
ghcr.io/palemtnrider/weave-gitops:v0.3.2 -> pod
running 1 container
● Pods have a lifecycle (Pending, Running, Succeeded, Failed,
Unknown, Waiting, Terminated, Evicted)
● A “pod” deﬁnition like this by itself is not declarative. Calling a
single instance (named) – imperative behavior
What does that mean? (Example - Bad)
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● Deployment -> (replicas: [N], template @ speciﬁcation)
○ Kubectl apply -f dep.yaml -> ReplicaSet (replicas: [N],
immutable speciﬁcation)
(Deployment desires a matching ReplicaSet)
○ -> Pods[N] (each: [Ready], single @ immutable spec)
(ReplicaSet desires [N] pods at ready state)
● Declarative primitives rescue you from managing the imperative
lifecycle of pods (built-in to Kubernetes)
What does that mean? (Example)
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● Job -> (replicas: [N], template @ speciﬁcation)
● CronJob -> Job (replicas: [N], immutable speciﬁcation)
(Triggered automatically on a schedule)
● StatefulSet -> Pods[N] (like a Deployment, but Stateful)
(Each replica has identity, bound to a Persistent Volume)
● Control Loops - Kubernetes Controller Manager
Drives each resource toward declared state
What does that mean?
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● Declare your desired state
● Apply to your Kubernetes environment
● Control Loops for primitives and custom resources drive toward
and maintain declared state
What does that mean?
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● What would it look like if the desired state of an entire
cluster/system was represented as a single artifact?
What is GitOps?
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● Git Commit - with Kubernetes YAML manifests
What is GitOps?
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● Git Commit - with Kubernetes YAML manifests
● (GitOps is more than that)
What is GitOps?
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● Greater Visibility
○ Surfaces important metrics
● Improved Security
○ Less permissions
○ Access Log
● Easier Compliance
○ Standardization
○ Auditibility
Beneﬁts for Business

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● Easier Deploys
○ Locally & Remotely
● Reduced knowledge required to interact with a cluster
● No cluster write credentials needed to interact with a cluster
○ “Kubectl apply, edit, create, wait where was I again”
○ “I ran a command that has left things in an irreversible state”
Beneﬁts for Developers
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● Less code to maintain
○ scripts that go kubectl apply ➡ replaced by trusted OSS
● Less permissions
○ write cluster account ➡ replaced by git
● Easier Rollbacks
○ Previous commit + deploy job ➡ previous commit
● Easier to track changes
● Provides a layer of standardization for delivery
Beneﬁts for Platform Teams
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● Declarative Conﬁguration
● Version Controlled, Immutable artifacts
● Single Source of Truth
What is GitOps?
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● Automated Delivery
What is GitOps?
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● Automated Delivery of Declarative Resources
What is GitOps?
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● Agents running in the cluster, Reconciling Deﬁnitions
What is GitOps?
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● Agents running in the cluster, Reconciling Deﬁnitions
● “Closed Loop”
What is GitOps?
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At a Glance
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��💻
��
This is my system
��

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At a Glance
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��💻
��
This is my system
1 - Declarative
2 - Version Controlled

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At a Glance
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��💻
��
This is my system
��
1 - Declarative
2 - Version Controlled
3- Automated Delivery
4 - Software Agents
5 - Closed Loop

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API
CI
>_
kubectl
��🏽💻
��💻
��
Registry
docker
build
��
��
��
Traditional

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- Git centric way of implementing continuous delivery
- Beneﬁts include
- Increased Productivity
- Enhanced Developer Experience
- Improved Stability
- Higher Reliability
- Consistency and Standardization
- Stronger Security Guarantees
- 4 Principles
- GitOps overcomes the problems of tightly-coupled CI and CD
In Summary

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Weave GitOps
Unlocking Cloud Agility
Customer Value with
GitOps
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Tamao Nakahara, VP of Developer Experience, Weaveworks

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Weaveworks is a software and services company founded in 2014.
We are known for world class tools and delivery to a global customer base including the
world’s biggest companies. The biggest clouds use our software and partner with us.
1. We provide a modular solution for customers transitioning to a cloud native platform
2. We are a neutral vendor adding value to any ﬂavor of managed Kubernetes
3. We deliver consistent management and operational control to IT
We are leaders in “GitOps” – best practices for consistent management of cloud native apps
Introduction to Weaveworks

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IT delivery velocity leads to competitive business success
DORA1
research shows that technical organisations with the best velocity on four key software delivery
measures are twice as likely to meet their organisational goals.
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1. https://services.google.com/fh/ﬁles/misc/state-of-devops-2019.pdf

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Code
Test Commit
Build
Aims:
Maximal time coding
Fast cycle times
Local environment
● Simple development experience that scales
from local kind clusters to full scale
deployment
● GitOps improves every stage from
development to ﬂeet deployment
● Developer-focused tools and UX enable
developers to be more productive across
teams and enterprises
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Weave GitOps Core and Enterprise
The Kubernetes Native, Flux Native, GitOps Platform

https://cloud.google.com/blog/products/devops-sre/the-2019-accelerate-state-of-devops-elite-performance-productivity-and-scaling

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Challenge: Developer Velocity
❏ Slow feature delivery cycles
❏ Manual, unreliable deployments
❏ Downtime during deployment
Accelerate software lifecycles through automation
Solution: GitOps Automation
❏ Resilient and Automated
deployment process
❏ Continuous application delivery
❏ Increase MTTD and decrease MTTR

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Weave Gitops Core: Flux Native, Open Source
Application Delivery
● Represents the repositories that store a
collection of a declarative description of
runnable units
● Describes for the platform how to
deploy, start, operate, and retire the
corresponding service artifact.
● Presents which of those repos is being
polled by the Weave GitOps controllers
● Presents the services and the
workloads running in instances in a
speciﬁc environment, including status
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Weave GitOps Enteprise
Scaling Gitops
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Educate Enable Platform Applications
Weaveworks Consulting, Training and CRE Service
• Guided technology choices
• Cloud native reference
architecture designs
• Cloud native technology
options and selection
Weave GitOps Enterprise
• Infrastructure of your choice:
public cloud and on premise
• Conﬁguration management
for the whole platform
• Integrated security
• 24/7 Support
DevOps
• Automation, management
and Continuous Delivery
• Prometheus monitoring
and alerting
• Training for cluster
operators, application
operators and developers
• Delivery of POCs and
experimental environments
Accelerating the path to Cloud Native
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GET STARTED FAST DESIGN AND BUILD
DELIVER A PRODUCTION
READY K8S PLATFORM
ENABLE AN AGILE
DELIVERY MODEL
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Conﬁdential do not distribute
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weave.works
Thank you

Free GitOps Workshop + Intro to Kubernetes & GitOps

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Free GitOps Workshop + Intro to Kubernetes & GitOps