GitOps
Content
Installing and managing OpenShift GitOps for declarative cluster and application management:
OpenShift GitOps Installation
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Operator Installation: Install OpenShift GitOps Operator from OperatorHub or via CLI
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Instance Configuration: Configure ArgoCD instances for different environments (dev, staging, prod)
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Resource Sizing: Size ArgoCD components based on repository count and sync frequency requirements
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High Availability: Configure ArgoCD for high availability in production environments
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Namespace Management: Set up appropriate namespaces and RBAC for GitOps operations
ArgoCD Configuration Management
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Repository Integration: Connect ArgoCD to Git repositories (GitHub, GitLab, Bitbucket, etc.)
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Cluster Registration: Register additional OpenShift clusters as ArgoCD deployment targets
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Application Projects: Configure ArgoCD projects to organize and isolate applications
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RBAC Configuration: Set up role-based access control for different teams and environments
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SSO Integration: Integrate ArgoCD with OpenShift OAuth or external identity providers
Application Lifecycle Management
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Application Definitions: Create and manage ArgoCD Application custom resources
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Sync Policies: Configure automatic vs manual sync policies and sync windows
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Health Checks: Define custom health checks for application resources
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Rollback Procedures: Implement rollback strategies for failed deployments
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Multi-cluster Deployments: Manage applications across multiple OpenShift clusters
GitOps Workflow Implementation
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Repository Structure: Establish standardized Git repository structures for infrastructure and applications
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Branching Strategy: Implement GitOps-friendly branching strategies (GitFlow, trunk-based, etc.)
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Promotion Workflows: Set up automated promotion workflows between environments
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Secret Management: Integrate external secret management solutions (Vault, External Secrets Operator)
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Configuration Management: Manage environment-specific configurations using Kustomize or Helm
Monitoring and Observability
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ArgoCD Metrics: Monitor ArgoCD performance, sync status, and application health
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Sync Monitoring: Track application sync frequency, duration, and success rates
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Drift Detection: Monitor and alert on configuration drift between Git and cluster state
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Audit Logging: Enable comprehensive audit logging for GitOps operations
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Notification Setup: Configure notifications for sync failures, drift detection, and deployment events
Security and Compliance
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Git Repository Security: Implement secure Git repository access using SSH keys or tokens
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Image Security: Integrate image scanning and security policies into GitOps workflows
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Policy Enforcement: Use Open Policy Agent (OPA) Gatekeeper for policy-as-code enforcement
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Compliance Scanning: Integrate compliance tools into GitOps deployment pipelines
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Access Controls: Implement least-privilege access for GitOps service accounts and users
Disaster Recovery and Backup
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ArgoCD Backup: Implement backup strategies for ArgoCD configuration and application definitions
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Repository Backup: Ensure Git repository backup and disaster recovery procedures
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Cluster Recovery: Establish cluster recovery procedures using GitOps for rapid restoration
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State Reconstruction: Implement procedures to reconstruct cluster state from Git repositories
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Testing Recovery: Regularly test disaster recovery procedures in non-production environments