[GEODE-10525] 2.0 RELEASE BLOCKER : Update Installation Guide for Java 17 Requirements

[JinwooHwang]

Description

This PR updates the Apache Geode documentation to reflect the minimum Java version requirement change from Java 8 to Java 17.

Changes

Documentation Updates

1. geode-book/config.yml

   • Updated min_java_version from '8' to '17'
   • Updated min_java_update from '121' to '16'
   • Updated product_version from '1.15' to '2.0'
   • Updated product_version_nodot from '115' to '20'
   • Updated product_version_old_minor from '1.14' to '1.15'
   • Updated documentation directory path from docs/guide/115 to docs/guide/20

2. geode-docs/getting_started/installation/install_standalone.html.md.erb

   • Updated Java path format from jdk1.8.0_121 to jdk-17.0.16 (modern Java versioning)
   • Updated all JAVA_HOME examples for Unix/Linux platforms
   • Updated all JAVA_HOME examples for Windows platforms

Files Modified

• geode-book/config.yml
• geode-docs/getting_started/installation/install_standalone.html.md.erb

Files Using Template Variables (Automatically Updated)

The following files use <%=vars.min_java_version%> and <%=vars.min_java_update%> variables and will automatically reflect the Java 17 requirement:

• geode-docs/getting_started/system_requirements/host_machine.html.md.erb
• geode-docs/getting_started/15_minute_quickstart_gfsh.html.md.erb
• geode-docs/configuring/cluster_config/persisting_configurations.html.md.erb
• geode-docs/configuring/running/running_the_locator.html.md.erb
• geode-docs/configuring/running/running_the_cacheserver.html.md.erb

Testing

• Documentation builds successfully without broken links
• Preview server confirms Java 17.0.16 is displayed in all examples
• Path format correctly uses modern Java versioning (jdk-17.x instead of jdk1.8.x)
• All references to Java versions are consistent across documentation

Preview

After these changes, the documentation will show:

• Minimum Java Version: Java SE Development Kit 17 with update 16 or higher
• JAVA_HOME Examples:
  • Unix/Linux: /usr/java/jdk-17.0.16
  • Windows: C:\Program Files\Java\jdk-17.0.16

Related

• Aligns with Apache Geode 2.0 release requirements
• Part of Jakarta EE migration effort

For all changes, please confirm:

• Is there a JIRA ticket associated with this PR? Is it referenced in the commit message?
• Has your PR been rebased against the latest commit within the target branch (typically develop)?
• Is your initial contribution a single, squashed commit?
• Does gradlew build run cleanly?
• Have you written or updated unit tests to verify your changes?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?

[JinwooHwang]

Thank you so much for your review and approval, @raboof. We are ready to merge.

[JinwooHwang]

All checks have passed.