Prometheus Server installation and configuration:
Prometheus is a free software application used for event monitoring and alerting. It records real-time metrics in a time series database (allowing for high dimensionality) built using a HTTP pull model, with flexible queries and real-time alerting.The project is written in Go and licensed under the Apache 2 License, with source code available on GitHub, and is a graduated project of the Cloud Native Computing Foundation, along with Kubernetes and Envoy.
Pre-Requisites :
Create a Cloud Playground server:
- Distribution: Ubuntu 18.04 Bionic Beaver LTS
- Size: Small
- Tag: Prometheus
Step 1 : Create a user, group, and directories for Prometheus:
#sudo useradd -M -r -s /bin/false prometheus
#sudo mkdir /etc/prometheus /var/lib/prometheus
Step 2:Download and extract the pre-compiled binaries:
#tar xzf prometheus-2.16.0.linux-amd64.tar.gz prometheus-2.16.0.linux-amd64/
Step 3: Move the files from the downloaded archive to the appropriate locations and set ownership:
#sudo cp prometheus-2.16.0.linux-amd64/{prometheus,promtool} /usr/local/bin/
#sudo chown prometheus:prometheus #/usr/local/bin/{prometheus,promtool}
#sudo cp -r prometheus-2.16.0.linux-amd64/{consoles,console_libraries} /etc/prometheus/
#sudo cp prometheus-2.16.0.linux-amd64/prometheus.yml /etc/prometheus/prometheus.yml
#sudo chown -R prometheus:prometheus /etc/prometheus
#sudo chown prometheus:prometheus /var/lib/prometheus
Step 4: Briefly test your setup by running Prometheus in the foreground:
#prometheus — config.file=/etc/prometheus/prometheus.yml
Step 5: Create a systemd unit file for Prometheus:
#sudo vi /etc/systemd/system/prometheus.service
Define the Prometheus service in the unit file:
[Unit]
Description=Prometheus Time Series Collection and Processing Server
Wants=network-online.target
After=network-online.target
[Service]
User=prometheus
Group=prometheus
Type=simple
ExecStart=/usr/local/bin/prometheus \
— config.file /etc/prometheus/prometheus.yml \
— storage.tsdb.path /var/lib/prometheus/ \
— web.console.templates=/etc/prometheus/consoles \
— web.console.libraries=/etc/prometheus/console_libraries
[Install]
WantedBy=multi-user.target
Step 6: Start and enable the Prometheus service:
#sudo systemctl daemon-reload
#sudo systemctl start prometheus
#sudo systemctl enable prometheus
Step 7: Make an HTTP request to Prometheus to verify it is able to respond:
curl localhost:9090
Step 8: You can also access Prometheus in a browser using the server’s public IP address: http://<PROMETHEUS_SERVER_PUBLIC_IP>:9090.
