Updating the monitoring suite

Updating Prometheus

Download the latest version

Download the latest version of Prometheus and run the checksum verification process to ensure that the downloaded file has not been tampered with.

cd
curl -LO https://github.com/prometheus/prometheus/releases/download/v2.45.0/prometheus-2.45.0.linux-amd64.tar.gz
echo "1c7f489a3cc919c1ed0df2ae673a280309dc4a3eaa6ee3411e7d1f4bdec4d4c5 prometheus-2.45.0.linux-amd64.tar.gz" | sha256sum --check

Expected output: Verify output of the checksum verification

prometheus-2.45.0.linux-amd64.tar.gz: OK

Replace existing version

If checksum is verified, extract the files and move them into the /usr/local/bin and /etc/prometheus directories for neatness and best practice. Then, clean up the duplicated copies.

tar xvf prometheus-2.45.0.linux-amd64.tar.gz
sudo cp prometheus-2.45.0.linux-amd64/prometheus /usr/local/bin/
sudo cp prometheus-2.45.0.linux-amd64/promtool /usr/local/bin/
sudo cp -r prometheus-2.45.0.linux-amd64/consoles /etc/prometheus
sudo cp -r prometheus-2.45.0.linux-amd64/console_libraries /etc/prometheus
sudo rm prometheus-2.45.0.linux-amd64.tar.gz
sudo rm -r prometheus-2.45.0.linux-amd64

Restart the service

Reload the systemd daemon, restart the service, and monitor the journal logs.

sudo systemctl daemon-reload
sudo systemctl restart prometheus.service
sudo systemctl status prometheus.service

Expected output: The service should say it is "active (running)".

Check the journal logs to make sure there are no error messages.

sudo journalctl -fu prometheus -o cat | ccze -A

Updating Node Exporter

Download the latest version

Download the latest version of Node Exporter and run the checksum verification process to ensure that the downloaded file has not been tampered with.

cd
curl -LO https://github.com/prometheus/node_exporter/releases/download/v1.6.1/node_exporter-1.6.1.linux-amd64.tar.gz
echo "ecc41b3b4d53f7b9c16a370419a25a133e48c09dfc49499d63bcc0c5e0cf3d01 node_exporter-1.6.1.linux-amd64.tar.gz" | sha256sum --check

Expected output: Verify output of the checksum verification

node_exporter-1.6.1.linux-amd64.tar.gz: OK

If checksum is verified, extract the files and move them into the (/usr/local/bin) directory for neatness and best practice. Then, clean up the duplicated copies.

tar xvf node_exporter-1.6.1.linux-amd64.tar.gz
sudo cp node_exporter-1.6.1.linux-amd64/node_exporter /usr/local/bin
rm node_exporter-1.6.1.linux-amd64.tar.gz
rm -r node_exporter-1.6.1.linux-amd64

Restart the service

Reload the systemd daemon, restart the service, and monitor the journal logs.

sudo systemctl daemon-reload
sudo systemctl restart node_exporter.service
sudo systemctl status node_exporter.service

Expected output: The service should say it is "active (running)".

Check the journal logs to make sure there are no error messages.

sudo journalctl -fu node_exporter -o cat | ccze -A

Updating Grafana

Updating Grafana is done via the Linux APT packages as part of the overall OS update. Run the following command:

sudo apt update -y && sudo apt upgrade -y

Then, reboot the system.

sudo reboot