Operating OpenShift. An SRE Approach to Managing Infrastructure
Book information
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Copyright Table of Contents Preface Conventions Used in This Book Using Code Examples O’Reilly Online Learning How to Contact Us Acknowledgments Chapter 1. Introduction Traditional Operations Teams How Site Reliability Engineering Helps OpenShift as a Tool for Site Reliability Engineers Individual Challenges for SRE Teams Chapter 2. Installing OpenShift OKD, OCP, and Other Considerations OKD OCP OSD, ROSA, and ARO Local Clusters with OpenShift Local Planning Cluster Size Instance Sizing Recommendations Node Sizing Recommendations Master Sizing Recommendations Infra Nodes Basic OpenShift Installations Installer-Provisioned Infrastructure Self-Provisioned Infrastructure Summary Chapter 3. Running Workloads on OpenShift Deploying Code Deploying Existing Container Images Deploying Applications from Git Repositories Accessing Deployed Services Accessing Services from Other Pods Distribution of Requests Exposing Services Route by Auto-generated DNS Names Route by Path External Load Balancers Securing Services with TLS Specifying TLS Certificates Redirecting Traffic to TLS Route Let’s Encrypt Trusted Certificates Encrypted Communication to the Service Summary Chapter 4. Security Cluster Access Role-Based Access Control Roles and ClusterRoles RoleBindings and ClusterRoleBindings CLI ServiceAccounts Threat Modelling Workloads Summary Chapter 5. Automating Builds OpenShift Image Builds Docker Build Source to Image (S2I) Build Custom S2I Images Red Hat OpenShift Pipelines Overview Install Red Hat OpenShift Pipelines Setting Up the Pipeline Turning the Pipeline into Continuous Integration Summary Chapter 6. In-Cluster Monitoring Stack Cluster Monitoring Operator Prometheus Operator User Workload Monitoring Visualizing Metrics Console Dashboards Using Grafana Summary Chapter 7. Advanced Monitoring and Observability Strategies Service Oriented Monitoring Service Level Indicators Service Level Objectives Tools Logging ClusterLogging Log Forwarding Loki Visualization Installation Creating a Grafana Instance Data Source Dashboards Summary Chapter 8. Automating OpenShift Cluster Operations Recurring Operations Tasks Application Updates Certificate Renewals OpenShift Updates Backups Automating Recurring Operations Tasks Persistence Creating Snapshots Using CronJobs for Task Automation Cluster Configuration Manage Cluster Configuration with OpenShift GitOps Installing OpenShift GitOps Managing Configuration with OpenShift GitOps Managing Configuration of Multiple Clusters with OpenShift GitOps Summary Chapter 9. Developing Custom Operators to Automate Cluster Operations Operator SDK Operator Design Bootstrapping the Operator Setting Up a CA Directory for Development Designing the Custom Resource Definition Installing the CustomResourceDefinition Local Operator Development The Reconcile Function Deploying the Operator Creating and Updating OpenShift Resources Specifying RBAC Permissions Routing Traffic to the Operator Adding Additional Controllers Updating Resource Status Summary Chapter 10. Practical Patterns for Operating OpenShift Clusters at Scale Cluster Lifecycle Cluster Configuration Logging Monitoring Alerting Automation On Call Primary On Call Backup On Call Shift Rotation Ticket Queue Incident Management When to Declare an Incident Inform the Customer Define Roles Incident Timeline Document the Process Postmortem Accessing OpenShift Clusters The Stage Is Yours Index About the Authors Colophon
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