Apply min-level logging config to root logger

core/runtime/src/main/java/io/quarkus/runtime/logging/LoggingSetupRecorder.java

@@ -89,7 +89,14 @@ public void initializeLogging(LogConfig config, LogBuildTimeConfig buildConfig,
         final LogContext logContext = LogContext.getLogContext();
         final Logger rootLogger = logContext.getLogger("");
 
-        rootLogger.setLevel(config.level);
+        if (config.level.intValue() < buildConfig.minLevel.intValue()) {
+            log.warnf("Root log level %s set below minimum logging level %s, promoting it to %s",
+                    config.level, buildConfig.minLevel, buildConfig.minLevel);
+
+            rootLogger.setLevel(buildConfig.minLevel);
+        } else {
+            rootLogger.setLevel(config.level);
+        }
 
         ErrorManager errorManager = new OnlyOnceErrorManager();
         final Map<String, CleanupFilterConfig> filters = config.filters;

integration-tests/logging-min-level-unset/src/test/java/io/quarkus/it/logging/minlevel/unset/LoggingMinLevelAboveTest.java

@@ -13,7 +13,7 @@
  * and only messages at same runtime log level or above are shown.
  */
 @QuarkusTest
-@QuarkusTestResource(SetRuntimeLogLevels.class)
+@QuarkusTestResource(SetCategoryRuntimeLogLevels.class)
 public class LoggingMinLevelAboveTest {
 
     @Test

integration-tests/logging-min-level-unset/src/test/java/io/quarkus/it/logging/minlevel/unset/LoggingMinLevelByDefaultTest.java

@@ -13,7 +13,7 @@
  * and there's no applicable runtime log level override.
  */
 @QuarkusTest
-@QuarkusTestResource(SetRuntimeLogLevels.class)
+@QuarkusTestResource(SetCategoryRuntimeLogLevels.class)
 public class LoggingMinLevelByDefaultTest {
 
     @Test

integration-tests/logging-min-level-unset/src/test/java/io/quarkus/it/logging/minlevel/unset/LoggingMinLevelGlobalTest.java

@@ -0,0 +1,46 @@
+package io.quarkus.it.logging.minlevel.unset;
+
+import static io.restassured.RestAssured.given;
+import static org.hamcrest.CoreMatchers.is;
+
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.test.common.QuarkusTestResource;
+import io.quarkus.test.junit.QuarkusTest;
+
+/**
+ * Tests that logging works as expected when min-level is default,
+ * and the global log level is below it.
+ */
+@QuarkusTest
+@QuarkusTestResource(SetGlobalRuntimeLogLevel.class)
+public class LoggingMinLevelGlobalTest {
+
+    @Test
+    public void testInfo() {
+        given()
+                .when().get("/log/bydefault/info")
+                .then()
+                .statusCode(200)
+                .body(is("true"));
+    }
+
+    @Test
+    public void testWarn() {
+        given()
+                .when().get("/log/bydefault/warn")
+                .then()
+                .statusCode(200)
+                .body(is("true"));
+    }
+
+    @Test
+    public void testNotTrace() {
+        given()
+                .when().get("/log/bydefault/not-trace")
+                .then()
+                .statusCode(200)
+                .body(is("true"));
+    }
+
+}

integration-tests/logging-min-level-unset/src/test/java/io/quarkus/it/logging/minlevel/unset/LoggingMinLevelPromoteTest.java

@@ -16,7 +16,7 @@
  * it will be automatically promoted to DEBUG.
  */
 @QuarkusTest
-@QuarkusTestResource(SetRuntimeLogLevels.class)
+@QuarkusTestResource(SetCategoryRuntimeLogLevels.class)
 public class LoggingMinLevelPromoteTest {
 
     @Test

integration-tests/logging-min-level-unset/src/test/java/io/quarkus/it/logging/minlevel/unset/SetRuntimeLogLevels.java → integration-tests/logging-min-level-unset/src/test/java/io/quarkus/it/logging/minlevel/unset/SetCategoryRuntimeLogLevels.java

@@ -5,7 +5,7 @@
 
 import io.quarkus.test.common.QuarkusTestResourceLifecycleManager;
 
-public final class SetRuntimeLogLevels implements QuarkusTestResourceLifecycleManager {
+public final class SetCategoryRuntimeLogLevels implements QuarkusTestResourceLifecycleManager {
 
     @Override
     public Map<String, String> start() {

integration-tests/logging-min-level-unset/src/test/java/io/quarkus/it/logging/minlevel/unset/SetGlobalRuntimeLogLevel.java

@@ -0,0 +1,21 @@
+package io.quarkus.it.logging.minlevel.unset;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import io.quarkus.test.common.QuarkusTestResourceLifecycleManager;
+
+public final class SetGlobalRuntimeLogLevel implements QuarkusTestResourceLifecycleManager {
+
+    @Override
+    public Map<String, String> start() {
+        final Map<String, String> systemProperties = new HashMap<>();
+        systemProperties.put("quarkus.log.level", "TRACE");
+        return systemProperties;
+    }
+
+    @Override
+    public void stop() {
+    }
+
+}