Add Rocky Linux and AlmaLinux support

.github/workflows/ci.yml

@@ -29,6 +29,9 @@ jobs:
           - centos-stream-9
           - centos-stream-10
           - debian-12
+          - rockylinux-8
+          - rockylinux-9
+          - rockylinux-10
           - ubuntu-2204
           - ubuntu-2404
         suite:
@@ -105,6 +108,8 @@ jobs:
           - "almalinux-8"
           - "almalinux-9"
           - "debian-12"
+          - "rockylinux-8"
+          - "rockylinux-9"
           - "ubuntu-2004"
           - "ubuntu-2204"
           - "ubuntu-2404"

CHANGELOG.md

@@ -5,8 +5,13 @@ This file is used to list changes made in each version of the docker cookbook.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [11.10.2](https://github.com/sous-chefs/docker/compare/11.10.1...v11.10.2) (2025-10-15)
+## Unreleased
+
+### Added
 
+* Add Rocky Linux and AlmaLinux support - map to CentOS repositories since they are CentOS successors
+
+## [11.10.2](https://github.com/sous-chefs/docker/compare/11.10.1...v11.10.2) (2025-10-15)
 
 ### Bug Fixes
 

README.md

@@ -23,10 +23,12 @@ This cookbook is maintained by the Sous Chefs. The Sous Chefs are a community of
 ## Platform Support
 
 - Amazon Linux 2
-- Debian 9/10/11
+- Debian 9/10/11/12
 - Fedora
-- Ubuntu 18.04/20.04/22.04
-- CentOS 7/8
+- Ubuntu 18.04/20.04/22.04/24.04
+- CentOS 7/8/9
+- Rocky Linux 8/9
+- AlmaLinux 8/9
 
 ## Cookbook Dependencies
 

metadata.rb

@@ -16,5 +16,7 @@
 supports 'fedora'
 supports 'redhat'
 supports 'ubuntu'
+supports 'rocky'
+supports 'almalinux'
 
 gem 'docker-api', '>= 2.3', '< 3'

resources/installation_package.rb

@@ -142,6 +142,9 @@ def version_string(v)
           # s390x is only available under rhel platform
         elsif platform?('redhat', 'oracle') && (arch == 's390x' || !el7?)
           'rhel'
+          # Rocky and AlmaLinux are CentOS successors, use centos repos
+        elsif platform?('rocky', 'almalinux')
+          'centos'
           # use rhel for all el8 since CentOS 8 is dead
         elsif el8? && !platform?('centos')
           'rhel'

spec/docker_test/installation_package_spec.rb

@@ -196,6 +196,74 @@
     end
   end
 
+  context 'Rocky Linux 8: testing default action, default properties' do
+    platform 'rocky', '8'
+    cached(:subject) { chef_run }
+    it 'installs docker' do
+      expect(chef_run).to create_docker_installation_package('default')
+    end
+    it do
+      expect(chef_run).to create_yum_repository('docker').with(
+        baseurl: 'https://download.docker.com/linux/centos/8/x86_64/stable',
+        gpgkey: 'https://download.docker.com/linux/centos/gpg',
+        description: 'Docker Stable repository',
+        gpgcheck: true,
+        enabled: true
+      )
+    end
+  end
+
+  context 'Rocky Linux 9: testing default action, default properties' do
+    platform 'rocky', '9'
+    cached(:subject) { chef_run }
+    it 'installs docker' do
+      expect(chef_run).to create_docker_installation_package('default')
+    end
+    it do
+      expect(chef_run).to create_yum_repository('docker').with(
+        baseurl: 'https://download.docker.com/linux/centos/9/x86_64/stable',
+        gpgkey: 'https://download.docker.com/linux/centos/gpg',
+        description: 'Docker Stable repository',
+        gpgcheck: true,
+        enabled: true
+      )
+    end
+  end
+
+  context 'AlmaLinux 8: testing default action, default properties' do
+    platform 'almalinux', '8'
+    cached(:subject) { chef_run }
+    it 'installs docker' do
+      expect(chef_run).to create_docker_installation_package('default')
+    end
+    it do
+      expect(chef_run).to create_yum_repository('docker').with(
+        baseurl: 'https://download.docker.com/linux/centos/8/x86_64/stable',
+        gpgkey: 'https://download.docker.com/linux/centos/gpg',
+        description: 'Docker Stable repository',
+        gpgcheck: true,
+        enabled: true
+      )
+    end
+  end
+
+  context 'AlmaLinux 9: testing default action, default properties' do
+    platform 'almalinux', '9'
+    cached(:subject) { chef_run }
+    it 'installs docker' do
+      expect(chef_run).to create_docker_installation_package('default')
+    end
+    it do
+      expect(chef_run).to create_yum_repository('docker').with(
+        baseurl: 'https://download.docker.com/linux/centos/9/x86_64/stable',
+        gpgkey: 'https://download.docker.com/linux/centos/gpg',
+        description: 'Docker Stable repository',
+        gpgcheck: true,
+        enabled: true
+      )
+    end
+  end
+
   # Coverage of all recent docker versions
   # To ensure test coverage and backwards compatibility
   # With the frequent changes in package naming convention