DCD-1020: Make/enforce assumption that JVM packages setup a common symlink.

group_vars/aws_node_local.yml

@@ -34,8 +34,10 @@ atl_product_installation_versioned: "{{ atl_product_installation_base }}/{{ atl_
 atl_product_installation_current: "{{ atl_product_installation_base }}/current"
 atl_installer_temp: "{{ atl_installation_base }}/tmp"
 
-atl_jre_home: "{{ 'java' if atl_use_system_jdk else (atl_product_installation_current + '/jre') }}"
-atl_java_binary: "{{ atl_jre_home }}/bin/java"
+# NOTE: If using the non-installer java we expect to have the full JDK
+# installed and linked to `/usr/lib/jvm/java`, usually via `alternatives`.
+atl_java_home: "{{ '/usr/lib/jvm/java' if atl_use_system_jdk else (atl_product_installation_current + '/jre') }}"
+atl_java_binary: "{{ atl_java_home }}/bin/java"
 
 atl_product_logs_default: &logs_default
   - path: "{{ atl_product_installation_current }}/logs/*"

roles/crowd_config/tasks/main.yml

@@ -51,7 +51,7 @@
   lineinfile:
     path: "{{ atl_product_installation_versioned }}/apache-tomcat/bin/setenv.sh"
     insertafter: "EOF"
-    line: 'export JAVA_HOME=/usr/lib/jvm/jre-{{ java_version }}-openjdk'
+    line: "export JAVA_HOME={{ atl_java_home }}"
 
 - name: Create application directories
   file:

roles/product_common/tasks/ubuntu.yml

@@ -1,9 +1,20 @@
 ---
 
 - name: Install JDK if necessary on Ubuntu
-  package:
-    name:
-      - openjdk-{{ java_major_version }}-jdk-headless
+  block:
+
+    - name: Install JDK package
+      package:
+        name:
+          - openjdk-{{ java_major_version }}-jdk-headless
+
+    - name: Ensure common symlink exists
+      alternatives:
+        link: "/usr/lib/jvm/java"
+        name: "java_sdk"
+        path: "/usr/lib/jvm/java-8-openjdk-amd64"
+        priority: 99
+
   when: atl_use_system_jdk
   tags:
     - runtime_pkg