I am setting up graphite / grafana for my spring boot application. I am trying to find how to get network information like bytes in / out (network stats). Can someone tell me how I could derive this information? I am using tomcat as boot server
See meter name tomcat.global.received and tomcat.global.sent which come from Tomcat JMX Bean GlobalRequestProcessor's bytesReceived and bytesSent attributes respectively.
See also the relevant part of code in Micrometer.
Related
I am creating a spring boot microservice project with intelij IDEA.
Currently I have developed three seperate spring boot rest services as customer service, vehicle service and spring cloud config server. Spring cloud config server is pointing to a github repository.
The issue is sometimes above projects take more than 10 minutes to run and sometimes does't run and give an error message as "failed to check application readystate intellij attached provider for the vm is not found". I have no idea why this happens ?
There are two possible causes:
1. IntelliJ IDEA and the Spring application are running in different JVMs.
There is a bug for IntelliJ IDEA regarding that:
https://youtrack.jetbrains.com/issue/IDEA-210665
Here is short summary:
IntelliJ IDEA uses local JMX connector for retrieving Spring Boot actuator endpoint's data by default. However, it could be impossible to get local JMX connector address via attach api if Spring Boot application and IntelliJ IDEA are run by different JVMs. In this case, add the following lines to VM options of your Spring Boot run configuration:
-Dcom.sun.management.jmxremote.port={some_port}
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
As mentioned in the official Oracle documentation, this configuration is insecure. Any remote user who knows (or guesses) your port number and host name will be able to monitor and control your Java applications and platform.
2. Prolonged time to retrieve local hostname
You can check that time using inetTester. Normally it should take only several milliseconds to complete. If it takes a long time then you can add the hostname returned by inetTester to /etc/hosts file like this:
127.0.0.1 localhost winsky
::1 localhost winsky
I'm trying to get micrometer metrics data to Splunk. Each metric endpoint gives the current value of a metric, so I would need Splunk to send a http request to my application periodically, or I can write the metric values to a log file periodically.
So how do I get my application to write the metric values to logs?
If you are in spring boot 2.x and Micrometer is of version 1.1.0+ you can create a bean of
periodic (1 minute) special logging registry see (https://github.com/micrometer-metrics/micrometer/issues/605)
#Bean
LoggingMeterRegistry loggingMeterRegistry() {
return new LoggingMeterRegistry();
}
This is by far the easiest way to log everything via logging system.
Another alternative is creating a scheduled job that will run some method on a bean with injected metering registry that will iterate over all the metrics (with possibly filtering out the metrics that you won't need) and preparing the log of your format.
If you think about this, this is exactly what the metrics endpoint of spring boot actuator does, except returning the data via http instead of writing to log.
Here is an up-to-date implementation of the relevant endpoint from the spring boot actuator source
I am newbie to micrometer. could anyone let me know how to manage microservice metrics centrally in spring boot ?
Where i can get all registered service information and matrices and stored metrics in influxdb ?
Assuming that you're asking "How to use Micrometer with Spring Boot for collecting metrics from heterogeneous services which have multiple instances on multiple hosts" as there is nothing special with the microservice architecture compared to the assumed environment, you need to add dimensions to metrics for hosts, application instances, and so on. You can achieve it with the common tags support. See the section for it in the Spring Boot reference guide.
UPDATED:
To answer the additional question on the below comment, I created a sample showing how to use common tags with environment variables. Note that it's on the branch common-tags-2.1.x-with-env, not the master.
I'd like to get the current number of active client request threads in a spring boot app using embedded tomcat so that I can expose it over actuator's metrics endpoint. I'm not looking for active sessions, but active request processing threads. Preferably, I'd like to get this data per connector as well.
Does anyone have any ideas on a good way to get at this information in spring boot?
I don't know if this is what you are looking for, but you can get serveral values like that via JMX. You can start you current Spring Boot app and open Java Mission Control ([JDK directory]/bin). Open MBean browser and have a look at Tomcat->Thread Pool->[ConnectorName]:
You can get those values programmatically, too.
Is there a way to check whether zookeeper connection is lost while running Spring boot application ? After some research I came across health indicators from spring boot . But i cant find any article related to checking the health of the zookeeper connection from Spring boot. Or is there a simple,effective way out without using Health indicators ?
springboot has spring-cloud-zookeeper, it has ZookeeperHealthIndicator . if you use spring-cloud-zookeeper you do not need to care about it. or you can write your own zookeeper health indicator and take it as a reference.