《Kubernetes Operators》电子书PDF下载

Table Of Contents

1. Operators Teach Kubernetes New Tricks

   How Kubernetes Works
   Example: Stateless Web Server
   Stateful Is Hard
   Operators Are Software SREs
   How Operators Work
   Kubernetes CRs
   How Operators Are Made
   Example: The etcd Operator
   The Case of the Missing Member
   Who Are Operators For?
   Operator Adoption
   Let’s Get Going!

2. Running Operators

   Setting Up an Operator Lab
   Cluster Version Requirements
   Authorization Requirements
   Standard Tools and Techniques
   Suggested Cluster Configurations
   Checking Your Cluster Version
   Running a Simple Operator
   A Common Starting Point
   Fetching the etcd Operator Manifests
   CRs: Custom API Endpoints
   Who Am I: Defining an Operator Service Account
   Deploying the etcd Operator
   Declaring an etcd Cluster
   Exercising etcd
   Scaling the etcd Cluster
   Failure and Automated Recovery
   Upgrading etcd Clusters
   Cleaning Up
   Summary

3. Operators at the Kubernetes Interface

   Standard Scaling: The ReplicaSet Resource
   Custom Resources
   CR or ConfigMap?
   Custom Controllers
   Operator Scopes
   Namespace Scope
   Cluster-Scoped Operators
   Authorization
   Service Accounts
   Roles
   RoleBindings
   ClusterRoles and ClusterRoleBindings
   Summary

4. The Operator Framework

   Operator Framework Origins
   Operator Maturity Model
   Operator SDK
   Installing the Operator SDK Tool
   Operator Lifecycle Manager
   Operator Metering
   Summary

5. Sample Application: Visitors Site

   Application Overview
   Installation with Manifests
   Deploying MySQL
   Backend
   Frontend
   Deploying the Manifests
   Accessing the Visitors Site
   Cleaning Up
   Summary

6. Adapter Operators

   Helm Operator
   Building the Operator
   Fleshing Out the CRD
   Reviewing Operator Permissions
   Running the Helm Operator
   Ansible Operator
   Building the Operator
   Fleshing Out the CRD
   Reviewing Operator Permissions
   Running the Ansible Operator
   Testing an Operator
   Summary
   Resources

7. Operators in Go with the Operator SDK

   Initializing the Operator
   Operator Scope
   Custom Resource Definitions
   Defining the Go Types
   The CRD Manifest
   Operator Permissions
   Controller
   The Reconcile Function
   Operator Writing Tips
   Retrieving the Resource
   Child Resource Creation
   Child Resource Deletion
   Child Resource Naming
   Idempotency
   Operator Impact
   Running an Operator Locally
   Visitors Site Example
   Summary
   Resources

8. Operator Lifecycle Manager

   OLM Custom Resources
   ClusterServiceVersion
   CatalogSource
   Subscription
   InstallPlan
   OperatorGroup
   Installing OLM
   Using OLM
   Exploring the Operator
   Deleting the Operator
   OLM Bundle Metadata Files
   Custom Resource Definitions
   Cluster Service Version File
   Package Manifest File
   Writing a Cluster Service Version File
   Generating a File Skeleton
   Metadata
   Owned CRDs
   Required CRDs
   Install Modes
   Versioning and Updating
   Writing a Package Manifest File
   Running Locally
   Prerequisites
   Building the OLM Bundle
   Installing the Operator Through OLM
   Testing the Running Operator
   Visitors Site Operator Example
   Summary
   Resources

9. Operator Philosophy

   SRE for Every Application
   Toil Not, Neither Spin
   Automatable: Work Your Computer Would Like
   Running in Place: Work of No Enduring Value
   Growing Pains: Work That Expands with the System
   Operators: Kubernetes Application Reliability Engineering
   Managing Application State
   Golden Signals Sent to Software
   Seven Habits of Highly Successful Operators
   Summary

10. Getting Involved

    Feature Requests and Reporting Bugs
    Contributing
    Sharing Operators
    Summary

A. Running an Operator as a Deployment Inside a Cluster

B. Custom Resource Validation

C. Role-Based Access Control (RBAC)

Index

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Kubernetes Operators