version: '3'
services:
prometheus:
image: prom/prometheus
container_name: prometheus
volumes:
- ./prometheus/:/etc/prometheus/
- prometheus_data:/prometheus
command:
- '--config.file=/etc/prometheus/prometheus.yml'
- '--storage.tsdb.path=/prometheus'
- '--web.console.libraries=/usr/share/prometheus/console_libraries'
- '--web.console.templates=/usr/share/prometheus/consoles'
ports:
- "9090:9090"
restart: always
volumes:
prometheus_data:
User blow command to run prometheus container.
docker-compose up -d
When container start successfully, input http://127.0.0.1:9090 in borrower to access prometheus website.
Install golang dependencies with blow commands
go get github.com/prometheus/client_golang/prometheus
go get github.com/prometheus/client_golang/prometheus/promauto
go get github.com/prometheus/client_golang/prometheus/promhttp
Create main.go file and paste blow code to it, then use go run main.go to start application
- recordMetrics function to record myself metrics
- access http://127.0.0.1:2112 to view all application's metrics
package main
import (
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
"net/http"
"time"
)
func recordMetrics() {
go func() {
for {
opsProcessed.Inc()
time.Sleep(2 * time.Second)
}
}()
}
var (
opsProcessed = promauto.NewCounter(prometheus.CounterOpts{
Name: "myapp_processed_ops_total",
Help: "The total number of processed events",
})
)
func main() {
recordMetrics()
http.Handle("/metrics", promhttp.Handler())
err := http.ListenAndServe(":2112", nil)
if err != nil {
panic(err)
}
}
If you want to push application's metrics to prometheus instance. Add blow configuration to prometheus.yml and restart prometheus instance. Such as whole prometheus.yml that stored prometheus dict.
scrape_configs:
- job_name: myapp
scrape_interval: 10s
static_configs:
- targets:
- localhost:2112
