Editing Monitoring Server (section)

===Membuat backgroud service prometheus===
Kita buatkan file servicenya :
 sudo nano /etc/systemd/system/prometheus.service
sehingga isinya secara sederhana seperti berikut ini :
 #Prometheus Service
 
 [Unit]
 Description=Prometheus
 Documentation=https://prometheus.io/docs/introduction/overview/
 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/comnsole_libraries
 
 [Install]
 WantedBy=multi-user.target
Karena ada konfigurasi baru maka prometheus perlu di reload
  sudo systemctl daemon-reload
Kemudaian cek status prometheus
 sudo systemctl status prometheus.service
Disini statusnya masih dalam keadaan inactive
 ● prometheus.service - Prometheus
      Loaded: loaded (/etc/systemd/system/prometheus.service; disabled; vendor preset: enabled)
      Active: inactive (dead)
        Docs: https://prometheus.io/docs/introductions/overview/
Agar stausnya active dan servicenya enable maka jalankan command berikut :
 sudo systemctl enable --now prometheus.service
hasilnya :
 Created symlink /etc/systemd/system/multi-user.target.wants/prometheus.service → /etc/systemd/system/prometheus.service.
Cek sekali lagi :
 sudo systemctl status prometheus
hasilmya sudah running :
 ● prometheus.service - Prometheus
      Loaded: loaded (/etc/systemd/system/prometheus.service; enabled; vendor preset: enabled)
      Active: active (running) since Mon 2023-10-23 08:36:04 UTC; 2s ago
        Docs: https://prometheus.io/docs/introductions/overview/
    Main PID: 5597 (prometheus)
       Tasks: 5 (limit: 2252)
      Memory: 50.9M
      CGroup: /system.slice/prometheus.service
              └─5597 /usr/local/bin/prometheus --config.file /etc/prometheus/prometheus.yml --storage.tsdb.path /var/lib/promethe>
 
 Oct 23 08:36:04 pcbuntu systemd[1]: Started Prometheus.
Selanjutnya cek dan validasi sesuai port default di 9090 degan cara :
 sudo lsof -n -i | grep prometheus
menghasilkan :
 prometheu 2872      prometheus    7u  IPv6  36798      0t0  TCP *:9090 (LISTEN)
 prometheu 2872      prometheus   11u  IPv4  37901      0t0  TCP 127.0.0.1:56360->127.0.0.1:9090 (ESTABLISHED)
 prometheu 2872      prometheus   12u  IPv6  37902      0t0  TCP 127.0.0.1:9090->127.0.0.1:56360 (ESTABLISHED)
Dapat dilihat port server yang akan dimonitor sudah aktif, selanjutnya coba akses ip_server:9090.
Sebelumnya cek dulu ip server menggunakan :
 hostname -I
misal hasilnya :
 10.10.10.7
Dapat di akses menggunakan browser 10.10.10.7:9090 maka akan terbuka halaman Prometheus namun msh belum dilengkap metric-metric untuk memonitor system server, seperti cpu, memory, hardisk dan sebagainya.
Sampai pada tahap ini perispan Prometheus sudah selesai.