Simple Linux(🐧) server alerting, which sends push notifications to your devices 📱💻
There are three parts to this script:
- 👨⚕️Health Alerts (CPU,RAM,DISK)
- 📂 File Integrity (/etc/passwd /etc/shadow)
- 🗝️ SSH Alert (PAM.D Integration)
Screenshots: TBA
- Requires to run as root user (Monitors critical files)
- Install bc at packages (apt-get install bc at)
- Install NTFY (https://github.com/dschep/ntfy)
sudo pip install ntfy[emoji]
Edit/Create the file /root/.config/ntfy/ntfy.yml See NTFY documentation. For example, for pushover. we would put:
ntfy.yml
backends:
- pushover
pushover:
user_key: pastethekeyherefrompushover
Confirm NTFY works by typing:
ntfy send "test"
You should recieve the push notification to your device if setup correctly.
su root
cd /opt
crontab -e
*/10 * * * * /opt/EZ-Server-Alerting/health_scan.sh >/dev/null 2>&1
For SSH Alerts we directly want to implement with PAM.d
TBA
Regular performance of the script looks to be good.
time ./health_scan.sh
real 0m0.039s
user 0m0.004s
sys 0m0.000s
strace -c ./health_scan.sh
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
99.83 0.040349 672 60 23 wait4
0.10 0.000042 0 226 41 stat
0.03 0.000014 0 239 fstat
0.03 0.000014 0 29 29 ioctl
0.00 0.000000 0 260 read
0.00 0.000000 0 31 write
0.00 0.000000 0 232 36 open
0.00 0.000000 0 362 26 close
0.00 0.000000 0 19 5 lseek
0.00 0.000000 0 386 mmap
0.00 0.000000 0 247 mprotect
0.00 0.000000 0 21 munmap
0.00 0.000000 0 108 brk
0.00 0.000000 0 411 rt_sigaction
0.00 0.000000 0 315 rt_sigprocmask
0.00 0.000000 0 23 rt_sigreturn
0.00 0.000000 0 224 150 access
0.00 0.000000 0 25 pipe
0.00 0.000000 0 52 dup2
0.00 0.000000 0 12 getpid
0.00 0.000000 0 39 clone
0.00 0.000000 0 20 execve
0.00 0.000000 0 5 uname
0.00 0.000000 0 10 4 fcntl
0.00 0.000000 0 2 chdir
0.00 0.000000 0 9 getrlimit
0.00 0.000000 0 3 sysinfo
0.00 0.000000 0 92 getuid
0.00 0.000000 0 92 getgid
0.00 0.000000 0 92 geteuid
0.00 0.000000 0 92 getegid
0.00 0.000000 0 12 getppid
0.00 0.000000 0 12 getpgrp
0.00 0.000000 0 18 getgroups
0.00 0.000000 0 9 sigaltstack
0.00 0.000000 0 27 2 statfs
0.00 0.000000 0 20 arch_prctl
0.00 0.000000 0 1 futex
0.00 0.000000 0 2 set_tid_address
0.00 0.000000 0 3 2 fadvise64
0.00 0.000000 0 2 set_robust_list
------ ----------- ----------- --------- --------- ----------------
100.00 0.040419 3844 318 total
To debug the errors strace -o strace.out -f ./health_scan.sh
To debug cronjob not working
*/10 * * * * /opt/EZ-Server-Alerting/health_scan.sh >> /opt/EZ-Server-Alerting/error.log 2>&1
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