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authorAnton Tananaev <anton.tananaev@gmail.com>2020-02-22 16:59:43 -0800
committerAnton Tananaev <anton.tananaev@gmail.com>2020-02-22 16:59:43 -0800
commit8d6e45331cb4ba86faaabfe7d1f9e7ccfd6e824d (patch)
treef6dcc78348c96a2785685dac603b5058304b62f6
parentdeb519ebd6798450509afaf4067e140edd7eb0d0 (diff)
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Support health monitoring
-rw-r--r--setup/default.xml1
-rw-r--r--setup/traccar.service3
-rw-r--r--src/main/java/org/traccar/Main.java59
-rw-r--r--src/main/java/org/traccar/api/HealthCheckService.java90
4 files changed, 130 insertions, 23 deletions
diff --git a/setup/default.xml b/setup/default.xml
index 1d82ad926..561b57a57 100644
--- a/setup/default.xml
+++ b/setup/default.xml
@@ -14,6 +14,7 @@
<entry key='web.port'>8082</entry>
<entry key='web.path'>./web</entry>
<entry key='web.cacheControl'>max-age=3600,public</entry>
+ <entry key='web.healthCheck'>true</entry>
<entry key='geocoder.enable'>false</entry>
<entry key='geocoder.type'>google</entry>
diff --git a/setup/traccar.service b/setup/traccar.service
index fe746dda8..6ae24ab8a 100644
--- a/setup/traccar.service
+++ b/setup/traccar.service
@@ -8,6 +8,9 @@ WorkingDirectory=/opt/traccar
ExecStart=/opt/traccar/jre/bin/java -jar tracker-server.jar conf/traccar.xml
SyslogIdentifier=traccar
SuccessExitStatus=143
+WatchdogSec=100
+Restart=on-failure
+RestartSec=10
[Install]
WantedBy=multi-user.target
diff --git a/src/main/java/org/traccar/Main.java b/src/main/java/org/traccar/Main.java
index 6ebd1d399..f5690b26d 100644
--- a/src/main/java/org/traccar/Main.java
+++ b/src/main/java/org/traccar/Main.java
@@ -1,5 +1,5 @@
/*
- * Copyright 2012 - 2019 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2020 Anton Tananaev (anton@traccar.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ import com.google.inject.Guice;
import com.google.inject.Injector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
+import org.traccar.api.HealthCheckService;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
@@ -105,6 +106,27 @@ public final class Main {
}
}
+ private static void scheduleHealthCheck() {
+ HealthCheckService service = new HealthCheckService();
+ if (service.isEnabled()) {
+ new Timer().scheduleAtFixedRate(
+ service.createTask(), service.getPeriod(), service.getPeriod());
+ }
+ }
+
+ private static void scheduleDatabaseCleanup() {
+ new Timer().scheduleAtFixedRate(new TimerTask() {
+ @Override
+ public void run() {
+ try {
+ Context.getDataManager().clearHistory();
+ } catch (SQLException error) {
+ LOGGER.warn("Clear history error", error);
+ }
+ }
+ }, 0, CLEAN_PERIOD);
+ }
+
public static void run(String configFile) {
try {
Context.init(configFile);
@@ -118,35 +140,26 @@ public final class Main {
Context.getWebServer().start();
}
- new Timer().scheduleAtFixedRate(new TimerTask() {
+ new Timer().schedule(new TimerTask() {
@Override
public void run() {
- try {
- Context.getDataManager().clearHistory();
- } catch (SQLException error) {
- LOGGER.warn("Clear history error", error);
- }
+ Context.getWebServer().stop();
}
- }, 0, CLEAN_PERIOD);
+ }, 10 * 60 * 1000);
- Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
- @Override
- public void uncaughtException(Thread t, Throwable e) {
- LOGGER.error("Thread exception", e);
- }
- });
+ scheduleHealthCheck();
+ scheduleDatabaseCleanup();
- Runtime.getRuntime().addShutdownHook(new Thread() {
- @Override
- public void run() {
- LOGGER.info("Shutting down server...");
+ Thread.setDefaultUncaughtExceptionHandler((t, e) -> LOGGER.error("Thread exception", e));
+
+ Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+ LOGGER.info("Shutting down server...");
- if (Context.getWebServer() != null) {
- Context.getWebServer().stop();
- }
- Context.getServerManager().stop();
+ if (Context.getWebServer() != null) {
+ Context.getWebServer().stop();
}
- });
+ Context.getServerManager().stop();
+ }));
} catch (Exception e) {
LOGGER.error("Main method error", e);
throw new RuntimeException(e);
diff --git a/src/main/java/org/traccar/api/HealthCheckService.java b/src/main/java/org/traccar/api/HealthCheckService.java
new file mode 100644
index 000000000..cd2856dfa
--- /dev/null
+++ b/src/main/java/org/traccar/api/HealthCheckService.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2020 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.api;
+
+import com.sun.jna.Library;
+import com.sun.jna.Native;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.Context;
+
+import java.util.TimerTask;
+
+public class HealthCheckService {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(HealthCheckService.class);
+
+ private SystemD systemD;
+
+ private boolean enabled;
+ private long period;
+
+ public HealthCheckService() {
+ if (Context.getConfig().getBoolean("web.healthCheck")
+ && System.getProperty("os.name").toLowerCase().startsWith("linux")) {
+ try {
+ systemD = Native.load("systemd", SystemD.class);
+ String watchdogTimer = System.getenv("WATCHDOG_USEC");
+ if (watchdogTimer != null && !watchdogTimer.isEmpty()) {
+ period = Long.parseLong(watchdogTimer) / 1000 * 4 / 5;
+ }
+ if (period > 0) {
+ LOGGER.info("Health check enabled with period {}", period);
+ enabled = true;
+ }
+ } catch (UnsatisfiedLinkError e) {
+ LOGGER.warn("No systemd support", e);
+ }
+ }
+ }
+
+ public boolean isEnabled() {
+ return enabled;
+ }
+
+ public long getPeriod() {
+ return period;
+ }
+
+ private String getUrl() {
+ String address = Context.getConfig().getString("web.address", "localhost");
+ int port = Context.getConfig().getInteger("web.port", 8082);
+ return "http://" + address + ":" + port + "/api/server";
+ }
+
+ public TimerTask createTask() {
+ return new TimerTask() {
+ @Override
+ public void run() {
+ LOGGER.debug("Health check running");
+ int status = Context.getClient().target(getUrl()).request().get().getStatus();
+ if (status == 200) {
+ int result = systemD.sd_notify(0, "WATCHDOG=1");
+ if (result < 0) {
+ LOGGER.warn("Health check notify error {}", result);
+ }
+ } else {
+ LOGGER.warn("Health check failed with status {}", status);
+ }
+ }
+ };
+ }
+
+ interface SystemD extends Library {
+ int sd_notify(int unset_environment, String state);
+ }
+
+}