[FEATURE] Add OPENSEARCH_JAVA_HOME env to override JAVA_HOME

Vagrantfile

@@ -484,6 +484,7 @@ def sh_install_deps(config,
     cat \<\<SUDOERS_VARS > /etc/sudoers.d/opensearch_vars
 Defaults   env_keep += "JAVA_HOME"
 Defaults   env_keep += "SYSTEM_JAVA_HOME"
+Defaults   env_keep += "OPENSEARCH_JAVA_HOME"
 SUDOERS_VARS
     chmod 0440 /etc/sudoers.d/opensearch_vars
   SHELL

distribution/packages/src/common/env/opensearch

@@ -6,7 +6,7 @@
 #OPENSEARCH_HOME=/usr/share/opensearch
 
 # OpenSearch Java path
-#JAVA_HOME=
+#OPENSEARCH_JAVA_HOME=
 
 # OpenSearch configuration directory
 # Note: this setting will be shared with command-line tools

distribution/packages/src/deb/init.d/opensearch

@@ -66,8 +66,9 @@ DAEMON=$OPENSEARCH_HOME/bin/opensearch
 DAEMON_OPTS="-d -p $PID_FILE"
 
 export OPENSEARCH_JAVA_OPTS
-export JAVA_HOME
 export OPENSEARCH_PATH_CONF
+export JAVA_HOME
+export OPENSEARCH_JAVA_HOME
 
 if [ ! -x "$DAEMON" ]; then
 	echo "The opensearch startup script does not exists or it is not executable, tried: $DAEMON"

distribution/packages/src/rpm/init.d/opensearch

@@ -53,6 +53,7 @@ export OPENSEARCH_JAVA_OPTS
 export JAVA_HOME
 export OPENSEARCH_PATH_CONF
 export OPENSEARCH_STARTUP_SLEEP_TIME
+export OPENSEARCH_JAVA_HOME
 
 lockfile=/var/lock/subsys/$prog
 

distribution/src/bin/opensearch-env

@@ -44,8 +44,11 @@ OPENSEARCH_HOME=`dirname "$OPENSEARCH_HOME"`
 # now set the classpath
 OPENSEARCH_CLASSPATH="$OPENSEARCH_HOME/lib/*"
 
-# now set the path to java
-if [ ! -z "$JAVA_HOME" ]; then
+# now set the path to java: OPENSEARCH_JAVA_HOME -> JAVA_HOME -> bundled JDK
+if [ ! -z "$OPENSEARCH_JAVA_HOME" ]; then
+  JAVA="$OPENSEARCH_JAVA_HOME/bin/java"
+  JAVA_TYPE="OPENSEARCH_JAVA_HOME"
+elif [ ! -z "$JAVA_HOME" ]; then
   JAVA="$JAVA_HOME/bin/java"
   JAVA_TYPE="JAVA_HOME"
 else

distribution/src/bin/opensearch-env.bat

@@ -39,16 +39,19 @@ if "%1" == "nojava" (
    exit /b
 )
 
-rem compariing to empty string makes this equivalent to bash -v check on env var
+rem comparing to empty string makes this equivalent to bash -v check on env var
 rem and allows to effectively force use of the bundled jdk when launching OpenSearch
-rem by setting JAVA_HOME=
-if "%JAVA_HOME%" == "" (
+rem by setting OPENSEARCH_JAVA_HOME= and JAVA_HOME= 
+if not "%OPENSEARCH_JAVA_HOME%" == "" (
+  set JAVA="%OPENSEARCH_JAVA_HOME%\bin\java.exe"
+  set JAVA_TYPE=OPENSEARCH_JAVA_HOME 
+) else if not "%JAVA_HOME%" == "" (
+  set JAVA="%JAVA_HOME%\bin\java.exe"
+  set JAVA_TYPE=JAVA_HOME
+) else (
   set JAVA="%OPENSEARCH_HOME%\jdk\bin\java.exe"
   set JAVA_HOME="%OPENSEARCH_HOME%\jdk"
   set JAVA_TYPE=bundled jdk
-) else (
-  set JAVA="%JAVA_HOME%\bin\java.exe"
-  set JAVA_TYPE=JAVA_HOME
 )
 
 if not exist !JAVA! (

qa/os/src/test/java/org/opensearch/packaging/test/ArchiveTests.java

@@ -85,6 +85,7 @@ public void test20PluginsListWithNoPlugins() throws Exception {
     public void test30MissingBundledJdk() throws Exception {
         final Installation.Executables bin = installation.executables();
         sh.getEnv().remove("JAVA_HOME");
+        sh.getEnv().remove("OPENSEARCH_JAVA_HOME");
 
         final Path relocatedJdk = installation.bundledJdk.getParent().resolve("jdk.relocated");
 
@@ -105,6 +106,7 @@ public void test30MissingBundledJdk() throws Exception {
 
     public void test31BadJavaHome() throws Exception {
         final Installation.Executables bin = installation.executables();
+        sh.getEnv().remove("OPENSEARCH_JAVA_HOME");
         sh.getEnv().put("JAVA_HOME", "doesnotexist");
 
         // ask for opensearch version to quickly exit if java is actually found (ie test failure)
@@ -114,11 +116,23 @@ public void test31BadJavaHome() throws Exception {
 
     }
 
+    public void test31BadOpensearchJavaHome() throws Exception {
+        final Installation.Executables bin = installation.executables();
+        sh.getEnv().put("OPENSEARCH_JAVA_HOME", "doesnotexist");
+
+        // ask for opensearch version to quickly exit if java is actually found (ie test failure)
+        final Result runResult = sh.runIgnoreExitCode(bin.opensearch.toString() + " -V");
+        assertThat(runResult.exitCode, is(1));
+        assertThat(runResult.stderr, containsString("could not find java in OPENSEARCH_JAVA_HOME"));
+
+    }
+
     public void test32SpecialCharactersInJdkPath() throws Exception {
         final Installation.Executables bin = installation.executables();
         assumeTrue("Only run this test when we know where the JDK is.", distribution().hasJdk);
 
         final Path relocatedJdk = installation.bundledJdk.getParent().resolve("a (special) path");
+        sh.getEnv().remove("OPENSEARCH_JAVA_HOME");
         sh.getEnv().put("JAVA_HOME", relocatedJdk.toString());
 
         try {
@@ -154,6 +168,8 @@ public void test50StartAndStop() throws Exception {
     }
 
     public void test51JavaHomeOverride() throws Exception {
+        sh.getEnv().remove("OPENSEARCH_JAVA_HOME");
+
         Platforms.onLinux(() -> {
             String systemJavaHome1 = sh.run("echo $SYSTEM_JAVA_HOME").stdout.trim();
             sh.getEnv().put("JAVA_HOME", systemJavaHome1);
@@ -171,8 +187,29 @@ public void test51JavaHomeOverride() throws Exception {
         assertThat(FileUtils.slurpAllLogs(installation.logs, "opensearch.log", "*.log.gz"), containsString(systemJavaHome1));
     }
 
-    public void test52BundledJdkRemoved() throws Exception {
+    public void test51OpensearchJavaHomeOverride() throws Exception {
+        Platforms.onLinux(() -> {
+            String systemJavaHome1 = sh.run("echo $SYSTEM_JAVA_HOME").stdout.trim();
+            sh.getEnv().put("OPENSEARCH_JAVA_HOME", systemJavaHome1);
+            sh.getEnv().put("JAVA_HOME", "doesnotexist");
+        });
+        Platforms.onWindows(() -> {
+            final String systemJavaHome1 = sh.run("$Env:SYSTEM_JAVA_HOME").stdout.trim();
+            sh.getEnv().put("OPENSEARCH_JAVA_HOME", systemJavaHome1);
+            sh.getEnv().put("JAVA_HOME", "doesnotexist");
+        });
+
+        startOpenSearch();
+        ServerUtils.runOpenSearchTests();
+        stopOpenSearch();
+
+        String systemJavaHome1 = sh.getEnv().get("OPENSEARCH_JAVA_HOME");
+        assertThat(FileUtils.slurpAllLogs(installation.logs, "opensearch.log", "*.log.gz"), containsString(systemJavaHome1));
+    }
+
+    public void test52JavaHomeBundledJdkRemoved() throws Exception {
         assumeThat(distribution().hasJdk, is(true));
+        sh.getEnv().remove("OPENSEARCH_JAVA_HOME");
 
         Path relocatedJdk = installation.bundledJdk.getParent().resolve("jdk.relocated");
         try {
@@ -197,7 +234,37 @@ public void test52BundledJdkRemoved() throws Exception {
         }
     }
 
+    public void test52OpensearchJavaHomeBundledJdkRemoved() throws Exception {
+        assumeThat(distribution().hasJdk, is(true));
+
+        Path relocatedJdk = installation.bundledJdk.getParent().resolve("jdk.relocated");
+        try {
+            mv(installation.bundledJdk, relocatedJdk);
+            Platforms.onLinux(() -> {
+                String systemJavaHome1 = sh.run("echo $SYSTEM_JAVA_HOME").stdout.trim();
+                sh.getEnv().put("OPENSEARCH_JAVA_HOME", systemJavaHome1);
+                sh.getEnv().put("JAVA_HOME", "doesnotexist");
+            });
+            Platforms.onWindows(() -> {
+                final String systemJavaHome1 = sh.run("$Env:SYSTEM_JAVA_HOME").stdout.trim();
+                sh.getEnv().put("OPENSEARCH_JAVA_HOME", systemJavaHome1);
+                sh.getEnv().put("JAVA_HOME", "doesnotexist");
+            });
+
+            startOpenSearch();
+            ServerUtils.runOpenSearchTests();
+            stopOpenSearch();
+
+            String systemJavaHome1 = sh.getEnv().get("OPENSEARCH_JAVA_HOME");
+            assertThat(FileUtils.slurpAllLogs(installation.logs, "opensearch.log", "*.log.gz"), containsString(systemJavaHome1));
+        } finally {
+            mv(relocatedJdk, installation.bundledJdk);
+        }
+    }
+
     public void test53JavaHomeWithSpecialCharacters() throws Exception {
+        sh.getEnv().remove("OPENSEARCH_JAVA_HOME");
+
         Platforms.onWindows(() -> {
             String javaPath = "C:\\Program Files (x86)\\java";
             try {
@@ -250,6 +317,7 @@ public void test54ForceBundledJdkEmptyJavaHome() throws Exception {
         // cleanup from previous test
         rm(installation.config("opensearch.keystore"));
 
+        sh.getEnv().put("OPENSEARCH_JAVA_HOME", "");
         sh.getEnv().put("JAVA_HOME", "");
 
         startOpenSearch();

qa/os/src/test/java/org/opensearch/packaging/test/PackagingTestCase.java

@@ -33,6 +33,7 @@
 package org.opensearch.packaging.test;
 
 import com.carrotsearch.randomizedtesting.JUnit3MethodProvider;
+import com.carrotsearch.randomizedtesting.RandomizedContext;
 import com.carrotsearch.randomizedtesting.RandomizedRunner;
 import com.carrotsearch.randomizedtesting.annotations.TestCaseOrdering;
 import com.carrotsearch.randomizedtesting.annotations.TestGroup;
@@ -182,11 +183,19 @@ public void setup() throws Exception {
 
         sh.reset();
         if (distribution().hasJdk == false) {
-            Platforms.onLinux(() -> sh.getEnv().put("JAVA_HOME", systemJavaHome));
-            Platforms.onWindows(() -> sh.getEnv().put("JAVA_HOME", systemJavaHome));
+            // Randomly switch between JAVA_HOME and OPENSEARCH_JAVA_HOME
+            final String javaHomeEnv = randomBoolean() ? "JAVA_HOME" : "OPENSEARCH_JAVA_HOME";
+            logger.info("Using " + javaHomeEnv);
+
+            Platforms.onLinux(() -> sh.getEnv().put(javaHomeEnv, systemJavaHome));
+            Platforms.onWindows(() -> sh.getEnv().put(javaHomeEnv, systemJavaHome));
         }
     }
 
+    private boolean randomBoolean() {
+        return RandomizedContext.current().getRandom().nextBoolean();
+    }
+
     @After
     public void teardown() throws Exception {
         if (installation != null && failed == false) {

qa/os/src/test/java/org/opensearch/packaging/test/WindowsServiceTests.java

@@ -149,12 +149,20 @@ public void test13InstallMissingBundledJdk() throws IOException {
     }
 
     public void test14InstallBadJavaHome() throws IOException {
+        sh.getEnv().put("OPENSEARCH_JAVA_HOME", "");
         sh.getEnv().put("JAVA_HOME", "doesnotexist");
         Result result = sh.runIgnoreExitCode(serviceScript + " install");
         assertThat(result.exitCode, equalTo(1));
         assertThat(result.stderr, containsString("could not find java in JAVA_HOME"));
     }
 
+    public void test14InstallBadOpensearchJavaHome() throws IOException {
+        sh.getEnv().put("OPENSEARCH_JAVA_HOME", "doesnotexist");
+        Result result = sh.runIgnoreExitCode(serviceScript + " install");
+        assertThat(result.exitCode, equalTo(1));
+        assertThat(result.stderr, containsString("could not find java in OPENSEARCH_JAVA_HOME"));
+    }
+
     public void test15RemoveNotInstalled() {
         Result result = assertFailure(serviceScript + " remove", 1);
         assertThat(result.stdout, containsString("Failed removing '" + DEFAULT_ID + "' service"));
@@ -163,6 +171,7 @@ public void test15RemoveNotInstalled() {
     public void test16InstallSpecialCharactersInJdkPath() throws IOException {
         assumeTrue("Only run this test when we know where the JDK is.", distribution().hasJdk);
         final Path relocatedJdk = installation.bundledJdk.getParent().resolve("a (special) jdk");
+        sh.getEnv().put("OPENSEARCH_JAVA_HOME", "");
         sh.getEnv().put("JAVA_HOME", relocatedJdk.toString());
 
         try {
@@ -248,6 +257,7 @@ public void test32StopNotStarted() throws IOException {
 
     public void test33JavaChanged() throws Exception {
         final Path relocatedJdk = installation.bundledJdk.getParent().resolve("jdk.relocated");
+        sh.getEnv().put("OPENSEARCH_JAVA_HOME", "");
 
         try {
             mv(installation.bundledJdk, relocatedJdk);
@@ -261,6 +271,22 @@ public void test33JavaChanged() throws Exception {
         }
     }
 
+    public void test33OpensearchJavaChanged() throws Exception {
+        final Path relocatedJdk = installation.bundledJdk.getParent().resolve("jdk.relocated");
+        sh.getEnv().put("JAVA_HOME", "");
+
+        try {
+            mv(installation.bundledJdk, relocatedJdk);
+            sh.getEnv().put("OPENSEARCH_JAVA_HOME", relocatedJdk.toString());
+            assertCommand(serviceScript + " install");
+            sh.getEnv().remove("OPENSEARCH_JAVA_HOME");
+            assertCommand(serviceScript + " start");
+            assertStartedAndStop();
+        } finally {
+            mv(relocatedJdk, installation.bundledJdk);
+        }
+    }
+
     public void test60Manager() throws IOException {
         Path serviceMgr = installation.bin("opensearch-service-mgr.exe");
         Path tmpServiceMgr = serviceMgr.getParent().resolve(serviceMgr.getFileName() + ".tmp");