# Monitoring Grafana \ Grafana is an open-source platform for data analysis and monitoring. It enables you to query, visualize, and comprehend metrics from various systems, such as databases, servers, cloud services, and many others. ## Prometheus Install #### 1 - Download latest software version ``` wget https://github.com/prometheus/prometheus/releases/download/v2.30.2/prometheus-2.30.2.linux-amd64 ``` #### 2 - Unzip ``` tar -xvf prometheus-2.30.2.linux-amd64.tar.gz ``` #### 3 - Copying contents from the prometheus directory to the appropriate directory ``` sudo cp -r ./prometheus-2.30.2.linux-amd64 /usr/local/bin/prometheus ``` #### 4 - Remove downloaded files ``` rm prometheus-2.30.2.linux-amd64.tar.gz rm -r prometheus-2.30.2.linux-amd64 ``` ### 5 - Creating service to run prometheus #### 5.1 - Create Prometheus Service File Create a file: ``` sudo vi /etc/systemd/system/prometheus.service ``` Put the following content inside it: ``` [Unit] Description=Prometheus Service After=network.target [Service] Type=simple ExecStart=/usr/local/bin/prometheus/prometheus --config.file /usr/local/bin/prometheus/prometheus.yml [Install] WantedBy=multi-user.target ``` #### 5.2 - Reload daemons ``` sudo systemctl daemon-reload ``` #### 6 - Execute the prometheus ``` sudo systemctl start prometheus ``` #### 7 - Checking if prometheus is really running ``` sudo systemctl status prometheus ``` Something like this will appear: ``` ● prometheus.service - Prometheus Service Loaded: loaded (/etc/systemd/system/prometheus.service; disabled; vendor preset: enabled) Active: active (running) since Sun 2021-10-03 04:55:46 UTC; 7min ago Main PID: 2388 (prometheus) Tasks: 6 (limit: 1071) Memory: 22.2M CGroup: /system.slice/prometheus.service └─2388 /usr/local/bin/prometheus/prometheus --config.file /usr/local/bin/prometheus/prometheus.yml ``` #### 8 - Enabling service in boot ``` sudo systemctl enable prometheus ``` ## Node exporter install #### 1 - Download latest software version ``` wget https://github.com/prometheus/node_exporter/releases/download/v1.3.1/node_exporter-1.3.1.linux-amd64.tar.gz ``` #### 2 - Unzip ``` tar -xvf node_exporter-1.3.1.linux-amd64.tar.gz ``` #### 3 - Copying contents from the node\_exporter directory to the appropriate directory ``` sudo cp -r ./node_exporter-1.3.1.linux-amd64 /usr/local/bin/node_exporter ``` #### 4 - Remove downloaded files ``` rm node_exporter-1.3.1.linux-amd64.tar.gz rm -r node_exporter-1.3.1.linux-amd64 ``` ### 5 - Creating service to run node\_exporter #### 5.1 - Create Node exporter Service File Create a file: ``` sudo vi /etc/systemd/system/node_exporter.service ``` Put the following content inside it: ``` [Unit] Description=Node Exporter Service After=network.target [Service] Type=simple ExecStart=/usr/local/bin/node_exporter/node_exporter [Install] WantedBy=multi-user.target ``` #### 5.2 - Reload daemons ``` sudo systemctl daemon-reload ``` #### 6 - Execute the node\_exporter ``` sudo systemctl start node_exporter ``` #### 7 - Checking if node\_exporter is really running ``` sudo systemctl status node_exporter ``` Something like this will appear: ``` sudo systemctl status node_exporter ● node_exporter.service - Node Exporter Service Loaded: loaded (/etc/systemd/system/node_exporter.service; disabled; vendor preset: enabled) Active: active (running) since Sun 2021-10-03 05:23:18 UTC; 14min ago Main PID: 2808 (node_exporter) Tasks: 3 (limit: 1071) Memory: 2.0M CGroup: /system.slice/node_exporter.service └─2808 /usr/local/bin/node_exporter/node_exporter ``` #### 8 - Enabling service in boot ``` sudo systemctl enable node_exporter ``` ## Grafana Install #### 1 - Download latest software version and install ``` sudo apt-get install -y adduser libfontconfig1 wget https://dl.grafana.com/oss/release/grafana_8.1.5_amd64.deb sudo dpkg -i grafana_8.1.5_amd64.deb ``` #### 2 - Remove downloaded package ``` rm grafana_8.1.5_amd64.deb ``` #### 3 - Start grafana-server service ``` sudo systemctl start grafana-server ``` #### 4 - Checking if grafana-server is really running ``` sudo systemctl status grafana-server ``` Something like this will appear: ``` ● grafana-server.service - Grafana instance Loaded: loaded (/lib/systemd/system/grafana-server.service; enabled; vendor preset: enabled) Active: active (running) since Sun 2021-10-03 23:40:30 UTC; 2h 41min ago Docs: http://docs.grafana.org Main PID: 7047 (grafana-server) Tasks: 11 (limit: 4705) Memory: 32.7M CGroup: /system.slice/grafana-server.service └─7047 /usr/sbin/grafana-server --config=/etc/grafana/grafana.ini --pidfile=/var/run/grafana/grafana-server.pid --packaging=deb cfg:default.paths.logs=/var/log/grafana cfg:default.paths.data=/var/lib/grafana cfg:default.paths.plugins=/var/lib/grafana/plugins cfg:defaul t.paths.provisioning=/etc/grafana/provisioning ``` #### 5 - Enabling service in boot ``` sudo systemctl enable grafana-server ``` #### 6 - Access Grafana Open Grafana at the following URL:
* Note: Open port 3000 in your firewall * Grafana's default credentials are: * username: admin password: admin
Note: a good security practice is to change the admin user password after the first login. #### 7 - Define Data Source Select Data source option in Configuration section in left panel.
Select Prometheus datasource type.
Define Prometheus name and URL. URL: [http://localhost:9090](http://localhost:9090/)
Click in Save and test button.
#### 8 - Import Dashboard
Upload file and click in load button. \\
Define name of Dashboard, select folder and click in import button.
If everything happens normally, your dashboard will appear on the screen.
## Grafana Alerts #### 1 - Access the Alert menu and then click Admin
#### 2 - Click the "Add Alertmanager" button
#### 3 - Set the URL where your external alertmanager instance is installed and click on the "Add alertmanagers" button
#### 4 - Access the panel inside the Dashboard that you want to add the alert, right-click on the panel and then click "Edit"
#### 5 - Click the "Alert" tab and click the "Create alert rule from this panel" button to create an alert with a direct link to this panel.
#### 6 - Define the name of the alert, the folder, the function, select the query and the limit that will be used for the alert.
#### 7 - Set the field "evaluate every" and "for", if necessary add a custom label and then click "Save and exit"
## Nginx Install and enable HTTPS connections with Let's Encrypt ``` sudo apt install nginx ``` Enable Nginx in boot: ``` sudo systemctl enable nginx ``` Certbot snap version install: ``` sudo snap install core; sudo snap refresh core sudo snap install --classic certbot sudo ln -s /snap/bin/certbot /usr/bin/certbot sudo certbot --nginx ``` Configure /etc/nginx/sites-enabled/default : ``` location / { # First attempt to serve request as file, then # as directory, then fall back to displaying a 404. try_files $uri $uri/ =404; proxy_pass http://localhost:3000; } location /api/live { proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "Upgrade"; proxy_set_header Host $http_host; proxy_pass http://localhost:3000/; } location /grafana/ { proxy_pass http://localhost:3000/; proxy_set_header Host $Host; proxy_max_temp_file_size 0; } ``` Configure /etc/grafana/grafana.ini : ``` [server] root_url = %(protocol)s://%(domain)s:/grafana serve_from_sub_path = true ``` Restart nginx and grafana-server services : ``` sudo systemctl restart grafana-server sudo systemctl restart nginx ``` ## Configuring names in hosts file #### 1 - Edit /etc/hosts file Define the names that will be used for each host, and put them in the file /etc/hosts, follow exemple: ``` sudo nano /etc/hosts nameofhost1 10.0.0.1 nameofhost2 10.0.0.2 nameofhost3 10.0.0.3 ``` #### 2 - Test configuration with ping command ``` ping nameofhost ``` Something like this will appear: ``` PING localhost (10.0.0.1) 56(84) bytes of data. 64 bytes from ip6-localhost (10.0.0.1): icmp_seq=1 ttl=64 time=0.012 ms 64 bytes from ip6-localhost (10.0.0.1): icmp_seq=2 ttl=64 time=0.042 ms ``` if the IP address that returns after the command matches the name you put in the /etc/hosts file, the configuration is correct Now in the configuration of prometheus you can configure the host name instead of the IP ``` - job_name: "Validators" static_configs: - targets: ["nameofhost1:9100","nameofhost2:9100","nameofhost3:9100"] ``` ## GitHub OAuth2 Authentication #### 1 - Register your application with GitHub To enable the GitHub OAuth2 you must register your application with GitHub. GitHub will generate a client ID and secret key for you to use. When you create the application you will need to specify a callback URL. Specify this as callback: ``` https://myrealdomain.com/grafana/login/github ``` Access your organization
Access Settings of your organization
Access Developer section and select OAuth App
Click in "New OAuth App"
Define OAuth app info
Get Client ID and generate new client secret
Store your Client ID and Client secret for alertmanager configuration #### 2 - Set root\_url in grafana.ini file ``` sudo nano /etc/grafana/grafana.ini [server] root_url = https://myrealdomain.com/grafana serve_from_sub_path = true ``` #### 3 - Enable GitHub in Grafana in grafana.ini file ``` sudo nano /etc/grafana/grafana.ini [auth.github] enabled = true allow_sign_up = true client_id = YOUR_GITHUB_APP_CLIENT_ID client_secret = YOUR_GITHUB_APP_CLIENT_SECRET scopes = user:email,read:org auth_url = https://github.com/login/oauth/authorize token_url = https://github.com/login/oauth/access_token api_url = https://api.github.com/user # space-delimited organization names allowed_organizations = organization1 organization2 ``` #### 4 - Restart grafana-server service ``` sudo systemctl restart grafana-server ``` #### 5 - After logout we have a login option with github
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