For exporting the metrics (to Prometheus) from the spring boot micro service, we can use the spring boot actuator and one more option is to use the Prometheus JMX exporter(https://github.com/prometheus/jmx_exporter) as a javaAgent when running the service. Though both of the options serve the same purpose, I do see that the JMX exporter is exporting way lot more metrics than the spring boot actuator. I was scouting through some spring boot documentations to see if there is any option to enable more metrics with spring boot actuator, looks like all the JMX metrics are enabled by default. So the questions is, is there a way to expose more metrics from spring boot actuator? Is there any recommendation or comparison study available for both the options mentioned above?
Any help here is greatly appreciated. Thanks!
If you are using Spring boot 2.x, then it works like this:
In Spring Boot 2.0, the in-house metrics were replaced with Micrometer support, so we can expect breaking changes. If our application was using metric services such as GaugeService or CounterService, they will no longer be available.
Instead, we're expected to interact with Micrometer directly. In Spring Boot 2.0, we'll get a bean of type MeterRegistry autoconfigured for us.
for Spring boot 1.x:
The metrics endpoint publishes information about OS and JVM as well as application-level metrics. Once enabled, we get information such as memory, heap, processors, threads, classes loaded, classes unloaded, and thread pools along with some HTTP metrics as well.
and this seems to work like Prometheus JMX
Related
I am using spring boot actuator (Spring Boot 2) to monitor the state of the application. Prometheus collects metrics. It calls endpoint actuator/prometheus. But there are quite a lot of metrics there. Is there any way to disable some of the metrics for prometheus?
i want to expose the disk usage for my micro-service to Prometheus, i'm already using micrometer and micrometer Prometheus with jdk 11 and spring boot actuator
im able to get all the other metrics working like tomcat_sessions and jvm_buffer_total_capacity_bytes etc,
and i can't seem to find a way of exposing the disk usage
Spring Boot comes with a neat remote monitoring shell (http://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-remote-shell.html) that's installed into Spring Boot apps by adding spring-boot-starter-remote-shell dependency. It provides access to Spring beans, jdbc, allows extension by custom commands, plugs into Spring Security for authentication, you can connect to it via SSH etc...
I would really like this feature in my regular non-boot Spring MVC application. I've searched the internet and Spring docs and found nothing. Any ideas how to achieve this besides reverse engineering spring-boot-starter-remote-shell sources?
I want to use spring's dependency injection for now(other core functionalites later maybe) in tomcat application.
I want to set up spring 2.5.5 in tomcat7, But don't have clarity on how to do this.
Specifically I am confused because I don't know whether to use Spring MVC or use just spring in tomcat.
I found this question helpful: Tomcat with Spring, But still didn't get the whole scenario on how to setup tomcat with spring.
You can do either, using just core spring with tomcat is fine. MVC provides additional functionality.
Take a look at the spring source examples on github, and read their docs.
(BTW I thouroughy spring-MVC component - it really saves time developing webapps)
I have a Spring based application that uses Spring core, Spring MVC and Spring Data (Mongo) on the server side, and designed as a typical 3-tier application.
I have a list of services, that are typical Spring services/beans that I wish you integrate with memcached to cache some of my service results.
Can someone guide me to the steps to integrate memcached with spring for such an application?
A sample/tutorial/blog that gives a step by step process would be just great.
Thanks.
If you use Spring 3.1 take a look at Spring Cache abstraction. It's the easiest way to integrate caching in Spring application. Unfortunately Spring doesn't support memcached out of the box, there's only support for ehcache.
As far as I know there isn't available any provider that can store data to memcached through Spring Cache. In few days next version 3.0.0 of Simple Spring Memcached is going to be released with such support. In mean time you may try one of the latest snapshot or use Simple Spring Memcached 2.0.0 directly without Spring Cache abstraction.
UPDATE: Simple Spring Memcached 3.0.0 with Spring Cache integration is already available.
It's very trivial to do. You can look at 3levelmemcache project as an example at github its Spring based abstraction.