GitOps: Stop, collaborate and deploy | DevNation Tech Talk

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The barrier to using Kubernetes and Openshift has never been lower, but how do we manage the applications that run on these clusters? During this presentation, we will have a live demonstration deploying a GitOps tool and then using it to manage both applications as well as cluster resources. We will also migrate an application live across the United States on multiple clusters with zero downtime, all managed through git.

Technology

CONFIDENTIAL designator
V0000000
GitOps
Stop, Collaborate, and Deploy
1
Ryan Cook
Principal Software Engineer
@cooktheryan

CONFIDENTIAL designator
V0000000
GitOps
● YAML objects stored in git repository with version control
● Templating available with Helm or Kustomize
● Quite simply “kubectl apply -f $path” runs over and over
● No object type creation limitations

CONFIDENTIAL designator
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Best Practices
● Least privileges as possible
● Store code and Kubernetes objects in different repositories
● Kubernetes objects should be in a private repo
○ Secrets
○ Routing information
● Document the process to create/recreate GitOps the
artifacts

CONFIDENTIAL designator
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Deployment Models
● Hub and Spoke
● Independent

CONFIDENTIAL designator
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ArgoCD
● Web UI
● Templating available with Helm or Kustomize
● Multiple sync options
○ Pruning
○ Auto-sync
○ Webhook
● Multiple cluster conﬁguration

CONFIDENTIAL designator
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Kustomize
● Allows you to override values in your Kubernetes objects
● Integrated into kubectl
● kustomize is super powerful for multisite

CONFIDENTIAL designator
V0000000
Architecture

CONFIDENTIAL designator
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Stop, Collaborate, and Deploy
DEMO

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