# Uzdevuma Z6.2 piemēra fails (kurss VPS un Linux serveru pārvaldība)
# Serveris "web1" (Debian 13). Pašu izveidots pakalpojums, kas darbina nelielu tīmekļa lietotni.

anna@web1:~$ systemctl status factuurapp
× factuurapp.service - Factuurapp (Node.js)
     Loaded: loaded (/etc/systemd/system/factuurapp.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Mon 2026-11-09 10:15:07 CET; 12min ago
   Duration: 412ms
    Process: 2291 ExecStart=/usr/bin/node /opt/factuurapp/server.js (code=exited, status=1/FAILURE)
   Main PID: 2291 (code=exited, status=1/FAILURE)
        CPU: 389ms

anna@web1:~$ sudo journalctl -u factuurapp --since "2026-11-09 10:14" --no-pager
nov 09 10:15:01 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:01 web1 node[2240]: Factuurapp 3.2.0 start op 127.0.0.1:3000
nov 09 10:15:01 web1 node[2240]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:01 web1 node[2240]:     at Server.setupListenHandle [as _listen2] (node:net:1908:16)
nov 09 10:15:02 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:02 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:03 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 1.
nov 09 10:15:03 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:03 web1 node[2252]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:03 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:03 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:04 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 2.
nov 09 10:15:04 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:05 web1 node[2266]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:05 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:05 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:06 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 3.
nov 09 10:15:06 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:06 web1 node[2279]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:06 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:06 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Scheduled restart job, restart counter is at 4.
nov 09 10:15:07 web1 systemd[1]: Started factuurapp.service - Factuurapp (Node.js).
nov 09 10:15:07 web1 node[2291]: Error: listen EADDRINUSE: address already in use 127.0.0.1:3000
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Main process exited, code=exited, status=1/FAILURE
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Start request repeated too quickly.
nov 09 10:15:07 web1 systemd[1]: factuurapp.service: Failed with result 'exit-code'.
nov 09 10:15:07 web1 systemd[1]: Failed to start factuurapp.service - Factuurapp (Node.js).

anna@web1:~$ sudo ss -tlnp | grep 3000
LISTEN 0 511 127.0.0.1:3000 0.0.0.0:* users:(("node",pid=1187,fd=21))

Jautājumi:
1. Kā sauc pakalpojumu (unit)?
2. Cik reizes pakalpojums kopā tika palaists (Started rindas)?
3. Ar kādu izejas kodu (status) programma apstājās?
4. Kāds ir cēlonis saskaņā ar pirmo kļūdas paziņojumu?
   a. Trūkst faila server.js
   b. Portu 3000 adresē 127.0.0.1 jau izmanto cits process
   c. Serverim ir par maz atmiņas
   d. Pakalpojums darbojas kā nepareizs lietotājs
5. Cikos (hh:mm:ss) systemd pārtrauca atkārtotas palaišanas mēģinājumus?
6. Kurš process aizņem portu (pid)?