Argo Rollouts

Christian Hernandez

Head of Community

Akuity

Evan Shortiss

Dev. Advocate & TMM

Red Hat

Ryan Jarvinen

Dev. Advocate

Red Hat

Progressive Delivery with

red.ht/scale-rollouts

at #SCaLE22x

How it started…

Attendee Survey

Do you feel comfortable using:

• Git
• Docker or podman
• Kubernetes
• Jenkins
• ArgoCD
• “GitOps”
• Blue/Green deployments
• Canary deployments

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CI / CD

Every 4 months Every week/day/hour

Continuous Developer Flow

Outer

loop

Inner

loop

Pull/Merge Request

Production

Inner loop

Outer loop

Developer

Test

What is GitOps?

Treat everything as code

Git is the single source of truth

Operations through Git workflows

CI/CD versus GitOps

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CI/CD Engines

�Jenkins�Spinnaker�Tekton�Concourse CI�…...

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Desired State

Cluster State

Observe State

Take Action

GitOps �Engines

ACM, ArgoCD, FluxCD�Razee, Faros

Desired State

Cluster State

Progressive Delivery

• No Big Bang
• Deploy != Release
• Metrics
• Subset of Users

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What is Progressive Delivery?

• Decreases Downtime
• Limits the Tragedy
• Deploy & Release to Production faster
• Less mocking or setting up unreliable ‘fake’ services

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Why Progressive Delivery?

Delivery Techniques

Blue Green Deployment

• All Or Nothing
• Quick Rollback

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Canary Releases

• Small Percentage
• Increase depending on success metrics

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Argo Rollouts

Argo Rollouts

https://argo-rollouts.readthedocs.io/en/stable/

• Rollouts is a drop-in replacement for Kubernetes Deployment with advanced capabilities for Progressive Delivery
• Supports two types of deployment strategies:
• Blue-Green
• Canary
• Integrates with a variety of traffic management solutions to shape traffic
• Automates deployment and rollbacks with advanced analysis capabilities

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Argo Rollouts

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ArgoCD detects change

rollout

Monitors Data

Rolling out automatically

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apiVersion: argoproj.io/v1alpha1

kind: Rollout

metadata:

name: rollouts-demo

labels:

app: rollouts-demo

spec:

strategy:

canary:

steps:

- setWeight: 20

- pause:

duration: "1m"

- setWeight: 50

- pause:

duration: "2m"

canaryService: rollouts-demo-canary

stableService: rollouts-demo-backend

trafficRouting:

istio:

virtualService:

name: rollout-vsvc

routes:

- primary

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“Smart” Progressive Delivery

Based on Metrics

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Metrics Based Rollouts

strategy:

canary:

analysis:

args:

- name: service-name

value: rollouts-demo-canary.canary.svc.cluster.local

templates:

- templateName: success-rate

canaryService: rollouts-demo-canary

stableService: rollouts-demo-stable

trafficRouting:

istio:

virtualService:

name: rollout-vsvc

routes:

- primary

steps:

- setWeight: 30

- pause: { duration: 20s }

- setWeight: 40

- pause: { duration: 10s }

- setWeight: 60

- pause: { duration: 10s }

- setWeight: 80

- pause: { duration: 5s }

- setWeight: 90

- pause: { duration: 5s }

- setWeight: 100

- pause: { duration: 5s }

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Metrics Based Rollouts

apiVersion: argoproj.io/v1alpha1

kind: AnalysisTemplate

metadata:

name: success-rate

spec:

args:

- name: service-name

metrics:

- name: success-rate

interval: 10s

successCondition: len(result) == 0 || result[0] >= 0.95

failureLimit: 2

provider:

prometheus:

address: https://internal:demo@prometheus.istio-system.svc.cluster.local:9090

query: |

sum(irate(istio_requests_total{

reporter="source",

destination_service=~"{{args.service-name}}",

response_code!~"5.*"}[30s])

)

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Workshop

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Workshop Registration

red.ht/workshop-rollout

Workshop Instructions

• Provide a unique email address

(addresses are not collected)

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• The password is “rollout”

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WorkShop URL�

WorkShop Instructions

Workshop content permalink:�https://openshiftdemos.github.io/argo-rollouts-workshop/argo-rollouts-workshop/main/index.html

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https://developers.redhat.com/e-books/path-gitops

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Free Developer e-Books & tutorials!

developers.redhat.com/eventtutorials�

Thank you!

Ryan Jarvinen

Dev. Advocate

Red Hat

@ryanj

Christian Hernandez

Head of Community

Akuity

@christianh814

Evan Shortiss

Dev. Advocate

Red Hat

@evanshortiss