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Argo CD.
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01

What is Argo CD and what problem does it solve?

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Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. It solves several key problems:

  • Configuration Drift: Ensures that the actual state of Kubernetes clusters matches the desired state defined in Git repositories
  • Manual Deployments: Eliminates manual kubectl commands and reduces human error
  • Lack of Visibility: Provides a centralized view of application deployments across multiple clusters
  • Inconsistent Environments: Ensures consistency between development, staging, and production environments
  • Audit Trail: Maintains a complete history of deployments through Git commits

Argo CD continuously monitors Git repositories and automatically synchronizes the desired application state with the live state in Kubernetes clusters.

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02

Explain the GitOps principles and how Argo CD implements them.

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GitOps is based on four core principles:

  1. Declarative: The entire system is described declaratively using YAML manifests
  2. Versioned and Immutable: All changes are tracked in Git with complete version history
  3. Pulled Automatically: Changes are automatically pulled and applied to the target environment
  4. Continuously Reconciled: The system continuously ensures actual state matches desired state

Argo CD implements these principles by:

  • Using Git repositories as the single source of truth for application configurations
  • Continuously polling Git repositories for changes
  • Automatically detecting configuration drift and providing options to sync
  • Maintaining an audit trail through Git commit history
  • Supporting rollbacks through Git reverts
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03

What are the different installation methods for Argo CD?

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Argo CD can be installed using several methods:

1. kubectl apply (Basic):

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml

2. Helm Chart:

helm repo add argo https://argoproj.github.io/argo-helm
helm install argocd argo/argo-cd -n argocd --create-namespace

3. Operator-based Installation:
Using the Argo CD Operator for more advanced lifecycle management

4. Kustomize:
For customized installations with environment-specific configurations

High Availability Setup:
For production environments, use the HA manifest:

kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/ha/install.yaml
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04

What is an Argo CD Application and how do you create one?

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Intermediate 9
05

What are the key differences between Argo CD and traditional CI/CD tools?

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06

Describe the core components of Argo CD architecture.

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07

How does Argo CD handle multi-cluster deployments?

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08

How do you configure Argo CD for high availability?

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09

Explain the different sync policies in Argo CD.

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10

How does Argo CD handle different manifest generation tools?

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11

What is configuration drift and how does Argo CD detect it?

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12

How does RBAC work in Argo CD?

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13

What are common Argo CD troubleshooting scenarios and solutions?

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Expert 9
14

Explain different sync strategies and when to use them.

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15

How do you implement progressive delivery with Argo CD?

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16

What are the security best practices for Argo CD?

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17

What are ApplicationSets and when would you use them?

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18

How do you implement App of Apps pattern in Argo CD?

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19

How do you handle secrets management in Argo CD?

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20

What are the monitoring and observability best practices for Argo CD?

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21

How do you implement disaster recovery for Argo CD?

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22

What are the performance optimization techniques for Argo CD at scale?

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Argo CD cheatsheet

Contents 16 sections · ~7 min skim Pro

Argo CD Interview Cheat Sheet

  • Summary01
  • What is Argo CD?02
  • Core Concepts03
  • Architecture04
  • Installation05
  • Basic Operations06
  • Advanced Features07
  • Security & RBAC08
  • Helm Integration09
  • Kustomize Integration10
  • Monitoring & Notifications11
  • Troubleshooting12
  • + 4 more inside
Open full sheet

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