The document discusses monitoring tools such as Prometheus, Nagios, and others, detailing their configuration for tracking various metrics. It includes examples of setting up alert rules and notification configurations, specifically highlighting Prometheus's functionality. Additionally, it describes the use of client libraries and exporters for different environments and services.

1. What is your
application doing
right now?
Matthias Grüter
@mattgruter

3. It will happen to you!

4. Nagios
Monit
Consul
Pingdom
Munin
Curl
InfluxDB
Bosun
Graphite
Prometheus
Dashing
JMX
Riemann
Librato
Codahale Metrics
Collectd
...

5. Nagios
Monit
Consul
Pingdom
Munin
Curl
InfluxDB
Bosun
Graphite
Prometheus
Dashing
JMX
Riemann
Librato
Codahale Metrics
Collectd
...

6. Enter Prometheus
promotheus.io
by SoundCloud

7. Client Libraries: Java, Ruby, Go, Python, Bash, Node…
Exporters: Docker, Mesos, AWS CloudWatch, JMX, StatsD
Out-of-the-Box: etcd, cAdvisor, Kubernetes
Pushgateway
Scrape

8. Query
http_requests_total
http_requests_total{env=”prod”}
http_requests_total{name=~”worker”}

10. job: {
name: "container-exporter"
scrape_interval: "5s"
target_group: {
target: "http://exporter:9104/metrics"
}
}
prometheus.conf

13. [...]
rule_file: "/etc/prometheus/prometheus.rules"
prometheus.conf
ALERT InstanceDown
IF up == 0
FOR 5m
WITH {}
SUMMARY "Instance {{$labels.instance}} down"
DESCRIPTION "{{$labels.instance}} has been down
for more than 5 minutes."
prometheus.rules

14. notification_config {
name: "alerts"
slack_config {
webhook_url: <URL>
send_resolved: true
}
}
aggregation_rule {
repeat_rate_seconds: 300
notification_config_name: "alert"
}
Prometheus Alert Manager

16. Qubit Coins

19. job: {
name: "balance"
scrape_interval: "5s"
target_group: {
labels: {
label: {
name: "zone"
value: "eu-central-1"
}
label: {
name: "env"
value: "prod"
}
}
target: "http://webapp:8080/metrics"
}
}
prometheus.conf

20. static final Gauge numberOfCoins = Gauge.build()
.name("coins")
.help("Number of coins").register();
// …
numberOfCoins.set(42);
Java
● Gauges
● Summary
● Counter
● Histogram