Need help,
I am not able to pass 2nd question despite solving the question exactly from solution,
Configure Prometheus and Node servers to use authentication to communicate. Find more details below:
(a) Username should be prometheus.
(b) Password should be secret-password, use the apache2-utils package to create a hash of the password.
(c) Configure node exporter’s config file, i.e., config.yml to use the authentication
(d) Finally, restart node exporter service once done.
Note: You should be able to SSH into node01 and node02 through user root (without any password) from prometheus-server. Once you SSH into any node (for example node01) and you are done with your changes, remember to exit from that node (i.e node01) before SSH into the another node (i.e node02).
Solution:
SSH to node01:
ssh root@node01
Install apache2-utils package:
apt update
apt install apache2-utils -y
Generate password hash:
htpasswd -nBC 10 "" | tr -d ':\n'; echo
It will ask for the password twice as below (enter password secret-password twice):
New password:
Re-type new password:
Finally, you will get a hashed value of your password.
Edit /etc/node_exporter/config.yml file:
vi /etc/node_exporter/config.yml
Add below lines in it:
basic_auth_users:
prometheus: <hashed-password>
Restart node_exporter service
systemctl restart node_exporter
exit
You can verify the changes using curl command:
curl http://node01:9100/metrics
return output should be Unauthorized
Note: Follow same steps for node02 except generating the password hash, you should be able to use the same password hash for node02.