context deadline exceeded for junos_exporter container

[panks21]

Hi
I need some help as I am not able to figure out the solution. I used portainer to deploy the stack using following docker-compose

---

version: "3"

volumes:
prometheus-data:
driver: local
grafana-data:
driver: local

services:
prometheus:
image: prom/prometheus:latest
container_name: prometheus
ports:
- "9090:9090"
volumes:
- /etc/prometheus:/etc/prometheus
- prometheus-data:/prometheus
restart: unless-stopped
command:
- "--config.file=/etc/prometheus/prometheus.yml"

grafana:
image: grafana/grafana-oss:latest
container_name: grafana
ports:
- "4000:3000"
volumes:
- grafana-data:/var/lib/grafana
restart: unless-stopped

junos_exporter:
image: czerwonk/junos_exporter
container_name: junos_exporter
ports:
- 9326:9326
restart: unless-stopped
volumes:
- /root/junos_exporter_config.yml:/config.yml:ro

---

However prometheus shows the target as down all the time with error as "Get "http://junos_exporter:9326/metrics?target=10.2.14.254": context deadline exceeded"

prometheus.yml file is as below

---

global:

scrape_interval: 30s

scrape_timeout: 30s

scrape_configs:

• job_name: "prometheus"
  static_configs:
  • targets: ["localhost:9090"]
• job_name: 'junos'
  static_configs:
  • targets:
    • 10.2.14.254 # Target Device
      relabel_configs:
  • source_labels: [address]
    target_label: __param_target
  • source_labels: [__param_target]
    target_label: instance
  • target_label: address
    replacement: junos_exporter:9326 # The junos_exporter's real hostname:port

---

Even the curl to the host on port 9326 doesn't result in anything but the container is shown as healthy and no error logs present for the container

[4xoc]

You probably have to increase your scrape_timeout. Depending on the hardware device a scrape takes a long time because the control plane cpu isn't too fast for the high number of cli commands than can result from using the exporter. You probably need to experiment a bit with different models to find out the largest stable timeout. Maybe use multiple jobs for different devices.

Couple of examples of timeout I know to be good (typically with most exporter features enabled):
MX480/MX960 = 30s
EX4200/EX4300/SRX300/SRX320/SRX340/SRX345 is < 2m