Table of Contents

• Title and Copyright Information
• Preface
  • Audience
  • Documentation Accessibility
  • Related Documents
  • Conventions
  • Guide to This Document
  • Diversity and Inclusion
• 1 Introduction to Zero Downtime Patching
  • What Is Zero Downtime Patching?
  • Identifying a Zero Downtime Patch
  • Types of Patching Workflows
  • The Patching Workflow Process
  • Reverting an Update
  • Rolling Out a Patched Oracle Home: Overview
  • Rolling Out a New Java Version: Overview
  • Rolling Out Updated Applications: Overview
  • In-Memory Session Replication for ZDT Rollouts
• 2 Preparing for Zero Downtime Patching
  • ZDT Patching Restrictions
  • Preparing to Migrate Singleton Services
    • Creating a JSON File for Migrating Singleton Services
  • Preparing to Roll Out a Patched Oracle Home
    • Creating a Second Oracle Home
    • Applying Patches to the Second Oracle Home
    • Creating an Archive and Distributing It to Each Node
  • Preparing to Upgrade to a New Java Version
  • Preparing to Update to New Application Versions
    • The Effects of Staging Modes
    • Creating an Application Update JSON File
• 3 Patching an Existing WebLogic Server Installation
  • Using Zero Downtime Patching
  • Obtaining a List of Applied Patches
• 4 Configuring and Monitoring Workflows
  • Strategies for Rolling Out a Patched Oracle Home
  • Starting the Administration Server
  • Using WLST to Initiate and Monitor Workflows
    • Rolling Out a New Oracle Home
    • Updating Your Java Version
    • Updating Both Oracle Home and the Java Version
    • Rolling Out Updated Applications
    • Reverting to the Previous Oracle Home, Java Home, or Applications
    • Initiating a Rolling Restart of Servers
    • Monitoring Workflow Progress
    • Executing, Reverting, and Resuming Stopped Workflows
    • Useful WLST Commands for Workflows
    • Sample WLST Script
  • Using the WebLogic Server Administration Console to Create and Monitor Workflows
    • Accessing ZDT Workflow Functions in the WebLogic Server Administration Console
    • Creating a New Workflow for a Domain, Clusters, or Servers
    • Monitoring and Managing Workflows
      • Viewing Workflow Details
      • Viewing Server Status
      • Viewing Cluster Status
    • Workflow Statuses
    • Workflow Logging
      • Filtering the Log File
      • Log Message Format
• 5 Modifying Workflows Using Custom Hooks
  • About Extension Points
  • The Patching Workflow Process for Custom Hooks
  • Specifying Extensions to Modify the Workflow