Events and Metrics

README.md

Events, Meet Metrics

You shouldn't have to go to separate applications for different data types. Juttle allows you to seamlessly combine events like log data, code deploys, and change windows with metrics like CPU, memory, disk or statsd and JMX metrics.

This example plots a typical metric (response time) and overlays server errors combed from logs on the host "sea.0" as vertical bars.

Your Turn:

• Line 3: Changing the hosts from "sea.0" to "sjc.1" or ["sea.0", "sea.1"]
• Line 8: Change the calculation from max to avg or min

data.juttle

export sub demo_metrics(from) {
   demo cdn -every :1 second: -period :1 second:
   -nhosts 3 -dos 0.7 -dos_router markov
   metrics "response_ms" -from from
}
 
export sub demo_events(from) {
   demo cdn -nhosts 3 -dos .7 -dos_router markov
   events -from from
}

main.juttle

import "data.juttle" as d; // Load the demo data configuration
 
const hosts = ["sea.0"]; // Declare the list of host(s) to look at

// Compute the maximum response time of the host(s) on a time chart
d.demo_metrics -from :5 minutes ago: |
filter service = "search" && host in hosts |
batch 5 |
reduce value = max(value) by host |
@timechart -by host -name response_time -title "Response time correlated with errors";
 
// Overlay server error event markers on the chart
d.demo_events -from :5 minutes ago: |
filter name = "server_error" && host in hosts |
@events -on response_time -labelField host -textField name