Question

@Component
public class CustomHealthIndicator extends AbstractHealthIndicator {

@Override
protected void doHealthCheck(Health.Builder builder) throws Exception {
    // Use the builder to build the health status details that should be reported.
    // If you throw an exception, the status will be DOWN with the exception message.

    builder.up()
            .withDetail("app", "Alive and Kicking")
            .withDetail("error", "Nothing! I'm good.");
}

} 在这里，我注意到默认的运行状况检查是通过/ health进行的，当dataConnection池缺少可用的连接时，我想覆盖上面的内容，我需要返回pod not ready。我还需要检查数据库的运行状况。该如何实现？

Answer 1

我做过类似的事情很久了。根据我对HikariDataSource的经验，得出的结果是：

@Autowired
    private DataSource dataSource;

    @Override
    protected void doHealthCheck(Health.Builder builder) throws Exception {

        HikariDataSource ds = (HikariDataSource) dataSource;
        Integer maxSize = ds.getMaximumPoolSize();
        Integer active = new HikariDataSourcePoolMetadata(ds).getActive();
        Double usage = new Double((active / maxSize) * 100);

        Health.Builder workingBuilder;

        if(usage > 90) {
            workingBuilder = builder.down();
        }else {
            workingBuilder = builder.up();
        }

        workingBuilder.withDetail("max", maxSize) //
        .withDetail("active", active)//
        .withDetail("usage", usage);
    }

通过执行器指标或使用

也许有更好的方法

   ds.getHealthCheckProperties()
   ds.getHealthCheckRegistry()

如何检查数据库运行状况和连接池运行状况

1 个答案: