Add quiet option to disable console logging (#20422)

This commit adds a -q/--quiet option to Elasticsearch so that it does not log anything in the console and closes stdout & stderr streams. This is useful for SystemD to avoid duplicate logs in both journalctl and /var/log/elasticsearch/elasticsearch.log while still allows the JVM to print error messages in stdout/stderr if needed.

closes #17220

TESTING.asciidoc

@@ -368,7 +368,8 @@ These are the linux flavors the Vagrantfile currently supports:
 * debian-8 aka jessie, the current debian stable distribution
 * centos-6
 * centos-7
-* fedora-22
+* fedora-24
+* oel-6 aka Oracle Enterprise Linux 6
 * oel-7 aka Oracle Enterprise Linux 7
 * sles-12
 * opensuse-13
@@ -377,7 +378,6 @@ We're missing the following from the support matrix because there aren't high
 quality boxes available in vagrant atlas:
 
 * sles-11
-* oel-6
 
 We're missing the follow because our tests are very linux/bash centric:
 

core/src/main/java/org/elasticsearch/bootstrap/Bootstrap.java

@@ -227,12 +227,12 @@ final class Bootstrap {
     }
 
     /**
-     * This method is invoked by {@link Elasticsearch#main(String[])}
-     * to startup elasticsearch.
+     * This method is invoked by {@link Elasticsearch#main(String[])} to startup elasticsearch.
      */
     static void init(
             final boolean foreground,
             final Path pidFile,
+            final boolean quiet,
             final Map<String, String> esSettings) throws BootstrapException, NodeValidationException {
         // Set the system property before anything has a chance to trigger its use
         initLoggerPrefix();
@@ -259,8 +259,9 @@ final class Bootstrap {
             }
         }
 
+        final boolean closeStandardStreams = (foreground == false) || quiet;
         try {
-            if (!foreground) {
+            if (closeStandardStreams) {
                 final Logger rootLogger = ESLoggerFactory.getRootLogger();
                 final Appender maybeConsoleAppender = Loggers.findAppender(rootLogger, ConsoleAppender.class);
                 if (maybeConsoleAppender != null) {
@@ -285,7 +286,7 @@ final class Bootstrap {
 
             INSTANCE.start();
 
-            if (!foreground) {
+            if (closeStandardStreams) {
                 closeSysError();
             }
         } catch (NodeValidationException | RuntimeException e) {

core/src/main/java/org/elasticsearch/bootstrap/BootstrapException.java

@@ -26,7 +26,7 @@ import java.util.Map;
  * Wrapper exception for checked exceptions thrown during the bootstrap process. Methods invoked
  * during bootstrap should explicitly declare the checked exceptions that they can throw, rather
  * than declaring the top-level checked exception {@link Exception}. This exception exists to wrap
- * these checked exceptions so that {@link Bootstrap#init(boolean, Path, Map)} does not have to
+ * these checked exceptions so that {@link Bootstrap#init(boolean, Path, boolean, Map)} does not have to
  * declare all of these checked exceptions.
  */
 class BootstrapException extends Exception {

core/src/main/java/org/elasticsearch/bootstrap/Elasticsearch.java

@@ -44,6 +44,7 @@ class Elasticsearch extends SettingCommand {
     private final OptionSpecBuilder versionOption;
     private final OptionSpecBuilder daemonizeOption;
     private final OptionSpec<Path> pidfileOption;
+    private final OptionSpecBuilder quietOption;
 
     // visible for testing
     Elasticsearch() {
@@ -58,6 +59,10 @@ class Elasticsearch extends SettingCommand {
             .availableUnless(versionOption)
             .withRequiredArg()
             .withValuesConvertedBy(new PathConverter());
+        quietOption = parser.acceptsAll(Arrays.asList("q", "quiet"),
+            "Turns off standard ouput/error streams logging in console")
+            .availableUnless(versionOption)
+            .availableUnless(daemonizeOption);
     }
 
     /**
@@ -92,17 +97,19 @@ class Elasticsearch extends SettingCommand {
 
         final boolean daemonize = options.has(daemonizeOption);
         final Path pidFile = pidfileOption.value(options);
+        final boolean quiet = options.has(quietOption);
 
         try {
-            init(daemonize, pidFile, settings);
+            init(daemonize, pidFile, quiet, settings);
         } catch (NodeValidationException e) {
             throw new UserException(ExitCodes.CONFIG, e.getMessage());
         }
     }
 
-    void init(final boolean daemonize, final Path pidFile, final Map<String, String> esSettings) throws NodeValidationException {
+    void init(final boolean daemonize, final Path pidFile, final boolean quiet, final Map<String, String> esSettings)
+            throws  NodeValidationException {
         try {
-            Bootstrap.init(!daemonize, pidFile, esSettings);
+            Bootstrap.init(!daemonize, pidFile, quiet, esSettings);
         } catch (BootstrapException | RuntimeException e) {
             // format exceptions to the console in a special way
             // to avoid 2MB stacktraces from guice, etc.

core/src/test/java/org/elasticsearch/bootstrap/ElasticsearchCliTests.java

@@ -43,6 +43,9 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
         runTestThatVersionIsMutuallyExclusiveToOtherOptions("--version", "--daemonize");
         runTestThatVersionIsMutuallyExclusiveToOtherOptions("--version", "-p", "/tmp/pid");
         runTestThatVersionIsMutuallyExclusiveToOtherOptions("--version", "--pidfile", "/tmp/pid");
+        runTestThatVersionIsMutuallyExclusiveToOtherOptions("--version", "-q");
+        runTestThatVersionIsMutuallyExclusiveToOtherOptions("--version", "--quiet");
+
         runTestThatVersionIsReturned("-V");
         runTestThatVersionIsReturned("--version");
     }
@@ -66,7 +69,7 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
     }
 
     private void runTestVersion(int expectedStatus, Consumer<String> outputConsumer, String... args) throws Exception {
-        runTest(expectedStatus, false, outputConsumer, (foreground, pidFile, esSettings) -> {}, args);
+        runTest(expectedStatus, false, outputConsumer, (foreground, pidFile, quiet, esSettings) -> {}, args);
     }
 
     public void testPositionalArgs() throws Exception {
@@ -74,21 +77,21 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
             ExitCodes.USAGE,
             false,
             output -> assertThat(output, containsString("Positional arguments not allowed, found [foo]")),
-            (foreground, pidFile, esSettings) -> {},
+            (foreground, pidFile, quiet, esSettings) -> {},
             "foo"
         );
         runTest(
             ExitCodes.USAGE,
             false,
             output -> assertThat(output, containsString("Positional arguments not allowed, found [foo, bar]")),
-            (foreground, pidFile, esSettings) -> {},
+            (foreground, pidFile, quiet, esSettings) -> {},
             "foo", "bar"
         );
         runTest(
             ExitCodes.USAGE,
             false,
             output -> assertThat(output, containsString("Positional arguments not allowed, found [foo]")),
-            (foreground, pidFile, esSettings) -> {},
+            (foreground, pidFile, quiet, esSettings) -> {},
             "-E", "foo=bar", "foo", "-E", "baz=qux"
         );
     }
@@ -109,7 +112,7 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
                 expectedStatus,
                 expectedInit,
                 outputConsumer,
-                (foreground, pidFile, esSettings) -> assertThat(pidFile.toString(), equalTo(expectedPidFile.toString())),
+                (foreground, pidFile, quiet, esSettings) -> assertThat(pidFile.toString(), equalTo(expectedPidFile.toString())),
                 args);
     }
 
@@ -124,7 +127,22 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
                 ExitCodes.OK,
                 true,
                 output -> {},
-                (foreground, pidFile, esSettings) -> assertThat(foreground, equalTo(!expectedDaemonize)),
+                (foreground, pidFile, quiet, esSettings) -> assertThat(foreground, equalTo(!expectedDaemonize)),
+                args);
+    }
+
+    public void testThatParsingQuietOptionWorks() throws Exception {
+        runQuietTest(true, "-q");
+        runQuietTest(true, "--quiet");
+        runQuietTest(false);
+    }
+
+    private void runQuietTest(final boolean expectedQuiet, final String... args) throws Exception {
+        runTest(
+                ExitCodes.OK,
+                true,
+                output -> {},
+                (foreground, pidFile, quiet, esSettings) -> assertThat(quiet, equalTo(expectedQuiet)),
                 args);
     }
 
@@ -133,7 +151,7 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
                 ExitCodes.OK,
                 true,
                 output -> {},
-                (foreground, pidFile, esSettings) -> {
+                (foreground, pidFile, quiet, esSettings) -> {
                     assertThat(esSettings.size(), equalTo(2));
                     assertThat(esSettings, hasEntry("foo", "bar"));
                     assertThat(esSettings, hasEntry("baz", "qux"));
@@ -147,7 +165,7 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
                 ExitCodes.USAGE,
                 false,
                 output -> assertThat(output, containsString("Setting [foo] must not be empty")),
-                (foreground, pidFile, esSettings) -> {},
+                (foreground, pidFile, quiet, esSettings) -> {},
                 "-E", "foo="
         );
     }
@@ -157,7 +175,7 @@ public class ElasticsearchCliTests extends ESElasticsearchCliTestCase {
                 ExitCodes.USAGE,
                 false,
                 output -> assertThat(output, containsString("network.host is not a recognized option")),
-                (foreground, pidFile, esSettings) -> {},
+                (foreground, pidFile, quiet, esSettings) -> {},
                 "--network.host");
     }
 

distribution/src/main/packaging/systemd/elasticsearch.service

@@ -21,10 +21,17 @@ ExecStartPre=/usr/share/elasticsearch/bin/elasticsearch-systemd-pre-exec
 
 ExecStart=/usr/share/elasticsearch/bin/elasticsearch \
                                                 -p ${PID_DIR}/elasticsearch.pid \
+                                                --quiet \
                                                 -Edefault.path.logs=${LOG_DIR} \
                                                 -Edefault.path.data=${DATA_DIR} \
                                                 -Edefault.path.conf=${CONF_DIR}
 
+# StandardOutput is configured to redirect to journalctl since
+# some error messages may be logged in standard output before
+# elasticsearch logging system is initialized. Elasticsearch
+# stores its logs in /var/log/elasticsearch and does not use
+# journalctl by default. If you also want to enable journalctl
+# logging, you can simply remove the "quiet" option from ExecStart.
 StandardOutput=journal
 StandardError=inherit
 

docs/reference/setup/install/systemd.asciidoc

@@ -18,13 +18,36 @@ sudo systemctl stop elasticsearch.service
 --------------------------------------------
 
 These commands provide no feedback as to whether Elasticsearch was started
-successfully or not.  Instead, this information will be written to the
-`systemd` journal, which can be tailed as follows:
+successfully or not. Instead, this information will be written in the log
+files located in `/var/log/elasticsearch/`.
+
+By default the Elasticsearch service doesn't log information in the `systemd`
+journal. To enable `journalctl` logging, the `--quiet` option must be removed
+ from the `ExecStart` command line in the `elasticsearch.service` file.
+
+When `systemd` logging is enabled, the logging information are available using
+the `journalctl` commands:
+
+To tail the journal:
 
 [source,sh]
 --------------------------------------------
 sudo journalctl -f
 --------------------------------------------
 
-Log files can be found in `/var/log/elasticsearch/`.
+To list journal entries for the elasticsearch service:
+
+[source,sh]
+--------------------------------------------
+sudo journalctl --unit elasticsearch
+--------------------------------------------
+
+To list journal entries for the elasticsearch service starting from a given time:
+
+[source,sh]
+--------------------------------------------
+sudo journalctl --unit elasticsearch --since  "2016-10-30 18:17:16"
+--------------------------------------------
 
+Check `man journalctl` or https://www.freedesktop.org/software/systemd/man/journalctl.html for
+more command line options.

docs/reference/setup/install/zip-targz.asciidoc

@@ -52,11 +52,14 @@ Elasticsearch can be started from the command line as follows:
 ./bin/elasticsearch
 --------------------------------------------
 
-By default, Elasticsearch runs in the foreground, prints its logs to `STDOUT`,
-and can be stopped by pressing `Ctrl-C`.
+By default, Elasticsearch runs in the foreground, prints its logs to the
+standard output (`stdout`), and can be stopped by pressing `Ctrl-C`.
 
 include::check-running.asciidoc[]
 
+Log printing to `stdout` can be disabled using the `-q` or `--quiet`
+option on the command line.
+
 [[setup-installation-daemon]]
 ==== Running as a daemon
 

qa/evil-tests/src/test/java/org/elasticsearch/bootstrap/EvilElasticsearchCliTests.java

@@ -38,7 +38,7 @@ public class EvilElasticsearchCliTests extends ESElasticsearchCliTestCase {
                 ExitCodes.OK,
                 true,
                 output -> {},
-                (foreground, pidFile, esSettings) -> {
+                (foreground, pidFile, quiet, esSettings) -> {
                     assertThat(esSettings.size(), equalTo(1));
                     assertThat(esSettings, hasEntry("path.home", value));
                 });
@@ -49,7 +49,7 @@ public class EvilElasticsearchCliTests extends ESElasticsearchCliTestCase {
                 ExitCodes.OK,
                 true,
                 output -> {},
-                (foreground, pidFile, esSettings) -> {
+                (foreground, pidFile, quiet, esSettings) -> {
                     assertThat(esSettings.size(), equalTo(1));
                     assertThat(esSettings, hasEntry("path.home", commandLineValue));
                 },

qa/vagrant/src/test/resources/packaging/scripts/60_systemd.bats

@@ -68,9 +68,24 @@ setup() {
     # starting Elasticsearch so we don't have to wait for elasticsearch to scan for
     # them.
     install_elasticsearch_test_scripts
+
+    # Capture the current epoch in millis
+    run date +%s
+    epoch="$output"
+
     systemctl start elasticsearch.service
     wait_for_elasticsearch_status
     assert_file_exist "/var/run/elasticsearch/elasticsearch.pid"
+    assert_file_exist "/var/log/elasticsearch/elasticsearch.log"
+
+    # Converts the epoch back in a human readable format
+    run date --date=@$epoch "+%Y-%m-%d %H:%M:%S"
+    since="$output"
+
+    # Verifies that no new entries in journald have been added
+    # since the last start
+    run journalctl _SYSTEMD_UNIT=elasticsearch.service --since "$since"
+    [ "$status" -eq 1 ]
 }
 
 @test "[SYSTEMD] start (running)" {

test/framework/src/main/java/org/elasticsearch/bootstrap/ESElasticsearchCliTestCase.java

@@ -32,7 +32,7 @@ import static org.hamcrest.CoreMatchers.equalTo;
 abstract class ESElasticsearchCliTestCase extends ESTestCase {
 
     interface InitConsumer {
-        void accept(final boolean foreground, final Path pidFile, final Map<String, String> esSettings);
+        void accept(final boolean foreground, final Path pidFile, final boolean quiet, final Map<String, String> esSettings);
     }
 
     void runTest(
@@ -46,9 +46,9 @@ abstract class ESElasticsearchCliTestCase extends ESTestCase {
             final AtomicBoolean init = new AtomicBoolean();
             final int status = Elasticsearch.main(args, new Elasticsearch() {
                 @Override
-                void init(final boolean daemonize, final Path pidFile, final Map<String, String> esSettings) {
+                void init(final boolean daemonize, final Path pidFile, final boolean quiet, final Map<String, String> esSettings) {
                     init.set(true);
-                    initConsumer.accept(!daemonize, pidFile, esSettings);
+                    initConsumer.accept(!daemonize, pidFile, quiet, esSettings);
                 }
             }, terminal);
             assertThat(status, equalTo(expectedStatus));