Set root logger level for CLIs

libs/cli/build.gradle

@@ -12,6 +12,7 @@ apply plugin: 'elasticsearch.publish'
 dependencies {
   api 'net.sf.jopt-simple:jopt-simple:5.0.2'
   api project(':libs:core')
+  api project(':libs:logging')
 
   testImplementation(project(":test:framework")) {
     exclude group: 'org.elasticsearch', module: 'cli'

libs/cli/src/main/java/module-info.java

@@ -11,6 +11,8 @@
 module org.elasticsearch.cli {
     requires jopt.simple;
     requires org.elasticsearch.base;
+    requires java.logging;
+    requires org.elasticsearch.logging;
 
     exports org.elasticsearch.cli;
 }

libs/cli/src/main/java/org/elasticsearch/cli/Command.java

@@ -15,6 +15,8 @@
 import joptsimple.OptionSpec;
 
 import org.elasticsearch.core.SuppressForbidden;
+import org.elasticsearch.logging.Level;
+import org.elasticsearch.logging.internal.spi.LoggerFactory;
 
 import java.io.Closeable;
 import java.io.IOException;
@@ -84,12 +86,16 @@ protected void mainWithoutErrorHandling(String[] args, Terminal terminal, Proces
             return;
         }
 
+        LoggerFactory loggerFactory = LoggerFactory.provider();
         if (options.has(silentOption)) {
             terminal.setVerbosity(Terminal.Verbosity.SILENT);
+            loggerFactory.setRootLevel(Level.OFF);
         } else if (options.has(verboseOption)) {
             terminal.setVerbosity(Terminal.Verbosity.VERBOSE);
+            loggerFactory.setRootLevel(Level.DEBUG);
         } else {
             terminal.setVerbosity(Terminal.Verbosity.NORMAL);
+            loggerFactory.setRootLevel(Level.INFO);
         }
 
         execute(terminal, options, processInfo);

libs/logging/src/main/java/module-info.java

@@ -9,5 +9,5 @@
 
 module org.elasticsearch.logging {
     exports org.elasticsearch.logging;
-    exports org.elasticsearch.logging.internal.spi to org.elasticsearch.server;
+    exports org.elasticsearch.logging.internal.spi to org.elasticsearch.server, org.elasticsearch.cli;
 }

libs/logging/src/main/java/org/elasticsearch/logging/internal/spi/LoggerFactory.java

@@ -9,6 +9,7 @@
 
 package org.elasticsearch.logging.internal.spi;
 
+import org.elasticsearch.logging.Level;
 import org.elasticsearch.logging.Logger;
 
 /**
@@ -26,6 +27,8 @@ public static LoggerFactory provider() {
 
     public abstract Logger getLogger(Class<?> clazz);
 
+    public abstract void setRootLevel(Level level);
+
     public static void setInstance(LoggerFactory INSTANCE) {
         LoggerFactory.INSTANCE = INSTANCE;
     }

server/src/main/java/org/elasticsearch/common/logging/internal/LoggerFactoryImpl.java

@@ -10,6 +10,8 @@
 package org.elasticsearch.common.logging.internal;
 
 import org.apache.logging.log4j.LogManager;
+import org.elasticsearch.common.logging.Loggers;
+import org.elasticsearch.logging.Level;
 import org.elasticsearch.logging.Logger;
 import org.elasticsearch.logging.internal.spi.LoggerFactory;
 
@@ -30,4 +32,10 @@ public Logger getLogger(Class<?> clazz) {
         // classloader a class comes from, we will use the root logging config.
         return getLogger(clazz.getName());
     }
+
+    @Override
+    public void setRootLevel(Level level) {
+        var log4jLevel = LevelUtil.log4jLevel(level);
+        Loggers.setLevel(LogManager.getRootLogger(), log4jLevel);
+    }
 }

x-pack/plugin/security/src/main/java/module-info.java

@@ -49,6 +49,7 @@
     requires oauth2.oidc.sdk;
     requires org.slf4j;
     requires unboundid.ldapsdk;
+    requires org.elasticsearch.logging;
 
     exports org.elasticsearch.xpack.security.action to org.elasticsearch.server;
     exports org.elasticsearch.xpack.security.action.apikey to org.elasticsearch.server;