文章目录
Health 信息是从 ApplicationContext 中所有的 HealthIndicator 的 Bean 中收集的, Spring Boot 内置了一些 HealthIndicator。
内置 HealthIndicator 监控检测
Name | Description |
---|---|
CassandraHealthIndicator | Checks that a Cassandra database is up. |
DiskSpaceHealthIndicator | Checks for low disk space. |
DataSourceHealthIndicator | Checks that a connection to DataSource can be obtained. |
ElasticsearchHealthIndicator | Checks that an Elasticsearch cluster is up. |
JmsHealthIndicator | Checks that a JMS broker is up. |
MailHealthIndicator | Checks that a mail server is up. |
MongoHealthIndicator | Checks that a Mongo database is up. |
RabbitHealthIndicator | Checks that a Rabbit server is up. |
RedisHealthIndicator | Checks that a Redis server is up. |
SolrHealthIndicator | Checks that a Solr server is up. |
我们,来看下源代码清单。
可见,Spring Boot 帮忙我们集成了许多比较常见的健康监控,例如 MySQL、 MongoDB、 Redis、 ElasticSearch、 Solr、 RabbitMQ 等。
自定义 HealthIndicator 监控检测
一般情况下,Spring Boot 提供的健康监控无法满足我们复杂的业务场景,此时,我们就需要定制自己的 HealthIndicator, 扩展自己的业务监控。
我们,实现 HealthIndicator 接口创建一个简单的检测器类。它的作用很简单,只是进行服务状态监测。此时,通过重写 health() 方法来实现健康检查。
- @Component
- public class CusStatusHealthIndicator implements HealthIndicator {
- @Override
- public Health health() {
- int errorCode = check();
- if (errorCode != 0) {
- return Health.down()
- .withDetail("status", errorCode)
- .withDetail("message", "服务故障")
- .build();
- }
- return Health.up().build();
- }
- private int check(){
- // 对监控对象的检测操作
- return HttpStatus.NOT_FOUND.value();
- }
- }
我们,来看看打印结果。
- {
- "status": "DOWN",
- "cusStatus": {
- "status": 404,
- "message": "服务故障"
- }
- }
此外,我们还可以通过继承 AbstractHealthIndicator 类,创建一个检测器类。
- @Component
- public class CusDiskSpaceHealthIndicator extends AbstractHealthIndicator {
- private final FileStore fileStore;
- private final long thresholdBytes;
- @Autowired
- public CusDiskSpaceHealthIndicator(
- @Value("${health.filestore.path:/}") String path,
- @Value("${health.filestore.threshold.bytes:10485760}") long thresholdBytes)
- throws IOException {
- fileStore = Files.getFileStore(Paths.get(path));
- this.thresholdBytes = thresholdBytes;
- }
- @Override
- protected void doHealthCheck(Health.Builder builder) throws Exception {
- long diskFreeInBytes = fileStore.getUnallocatedSpace();
- if (diskFreeInBytes >= thresholdBytes) {
- builder.up();
- } else {
- builder.down();
- }
- long totalSpaceInBytes = fileStore.getTotalSpace();
- builder.withDetail("disk.free", diskFreeInBytes);
- builder.withDetail("disk.total", totalSpaceInBytes);
- }
- }
AbstractHealthIndicator 实现 HealthIndicator 接口,并重写了 health() 方法来实现健康检查。因此,我们只需要重写 doHealthCheck 方法即可。
一般情况下,我们不会直接实现 HealthIndicator 接口,而是继承 AbstractHealthIndicator 抽象类。因为,我们只需要重写 doHealthCheck 方法,并在这个方法中我们关注于具体的健康检测的业务逻辑服务。
我们,来看看打印结果。
- {
- "status": "UP",
- "cusDiskSpace": {
- "status": "UP",
- "disk.free": 79479193600,
- "disk.total": 104856547328
- }
- }
源代码
相关示例完整代码: springboot-action
(完)
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- 版权声明:本文由 梁桂钊 发表于 梁桂钊的博客
- 转载声明:自由转载-非商用-非衍生-保持署名(创意共享3.0许可证),非商业转载请注明作者及出处,商业转载请联系作者本人。
- 文章标题:Spring Boot 揭秘与实战(九) 应用监控篇 - HTTP 健康监控
- 文章链接:http://blog.720ui.com/2017/springboot_09_actuator_http_healthindicator/
时间: 2024-11-08 05:07:31