Ubuntu 환경에서 Prometheus 설치하는 방법을 정리하였습니다. Ubuntu 환경에서는 Prometheus의 DEB 패키지가
존재하기 때문에 apt install을 통해 설치가 가능합니다. 또한 node_exporter 만 필요한 경우 이전 등록했던
Prometheus on CentOS 8을 참고하시면 됩니다.
Prerequisite
Before install Prometheus, run sudo apt update && sudo apt dist-upgrade -y.
Ubuntu supports the Prometheus DEB packages, don’t need to change other
options.
Install Prometheus
Make user account for prometheus and install packages using following commands.
sudo useradd --no-create-home --shell /usr/sbin/nologin prometheus;
sudo apt install -y prometheus prometheus-node-exporter;
# Start and register services
sudo systemctl start prometheus prometheus-node-exporter;
sudo systemctl enable prometheus prometheus-node-exporter;
If you need node_exporter only, run following command.
sudo apt install -y prometheus-node-exporter;
# Start and register node_exporter service
sudo systemctl start prometheus-node-exporter;
sudo systemctl enable prometheus-node-exporter;
Register node_exporter node
If you installed node_exporter only on remote server, register node_exporter server on the main prometheus server.
scrape_configs:
- job_name: 'node'
# If prometheus-node-exporter is installed, grab stats about the local
# machine by default.
static_configs:
- targets: ['localhost:9100', '<other node_exporter node>:9100']
After register other node_exporter, restart prometheus service on the main prometheus server.
sudo systemctl restart prometheus;
Other Options
For the ubuntu system, we can add some prometheus options using the default
config file /etc/default/prometheus. So, if you want to run prometheus with
some options, add command line arguments on ARGS variable in that config
file.
Extend Retention Time
If you run prometheus with default options over 3 weeks, you cannot query all
metrics over 15 days. Prometheus will remove old data over the value of
--storage.tsdb.retention or --storage.tsdb.retention.time. The default that
value is 15d and it means remove old data over 15days.
But if you want query over 15d using prometheus, please add retention time options. I has set the retention time to 3 years.
ARGS="--storage.tsdb.retention=3y"