86 lines
3.5 KiB
Bash
Executable File
86 lines
3.5 KiB
Bash
Executable File
#!/bin/bash
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### the used parts of this scrits have been written by tech_at_hangar.org
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## This unused part of this script checks for given minimum space on a mounted volume, and alerts ntfy in case the limit is surpassed. it stays here as a reference only. I copied the script from internet but I lost the reference, sorry!
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## root volume
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#mingigs=10
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#avail=$(df | awk '$6 == "/" && $4 < '$mingigs' * 1024*1024 { print $4/1024/1024 }')
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#if [ -n "$avail" ]; then
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# curl -k --retry 3 \
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# -d "Only $avail GB available on the root disk. Better clean that up." \
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# -H "Title: Low disk space alert on $(hostname)" \
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# -H "Priority: default" \
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# -H "Tags: warning,cd" \
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# $topicurl
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#fi
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## The first part of this script checks for disk usage and alerts if it exceeds 94%
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## The second part of this script checks for missing disks on btrfs raid1 devices and alerts ntfy in case of missing devices
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## The third part of this script checks for read/write errors on disks in mounted partitions and alerts ntfy in case of errors
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# the ntfy instance where you are senfing alerts to:
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topicurl=https://NTFY_SERVER_IP/disk_alerts
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### check disk usage status and notify if more then 95% is in use
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# print every /dev/ disk mounted, write all results in a single line, separated by commas and remove last comma
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mounted_partitions="$(df | awk '{print $1}' | grep '/dev/' | tr '\n' ',' | awk '{sub(/,$/,""); print}')"
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for i in ${mounted_partitions//,/ }
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do
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# df on every mounted disk detected, take the 5th column, remove the % symbol, and output only the second line
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disk_occupation=$(df $i | awk '{print $5}' | tail -n+2 | sed 's/.$//')
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if [ ${disk_occupation} -gt 95 ] ; then
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curl -k --retry 3 \
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-d "Less then 5% space available on the $i partition. Better clean that up." \
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-H "Title: Low disk space alert on $(hostname)" \
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-H "Priority: default" \
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-H "Tags: warning,cd" \
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$topicurl
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fi
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done
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### check btrfs raid status on btrfs devices
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if (btrfs fi show | grep -wic "Some devices missing"); then
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echo Bad: - Btrfs is missing devices, some disk is broken
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echo Sending alert...
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curl -k --retry 3 \
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-d "Bad - Some devices are missing in btrfs: maybe a broken disk?" \
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-H "Title: Missing disks in btrfs on $(hostname)" \
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-H "Priority: high" \
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-H "Tags: warning,boar" \
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$topicurl
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fi
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### check errors on btrfs devices
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# get list of btrfs mounted partition, put all results in a single line separated by a comma and remove the last comma
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mounted_btrfs_partitions="$(mount | grep btrfs | awk '{print $3}' | tr '\n' ',' | awk '{sub(/,$/,""); print}')"
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for i in ${mounted_btrfs_partitions//,/ }
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do
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# check btrfs errors on mounted device, if all output is 0 then return a single "1"
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check_disk_errors=$(btrfs device stats $i | awk '{print $2}' | grep -c 0 -v)
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if [ ${check_disk_errors} -eq 1 ] ; then
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: # do nothing if output is a single "1"
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else
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echo Bad: - Btrfs is detecting errors on partition $i, some disk is about to be broken
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echo Sending alert...
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curl -k --retry 3 \
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-d "Bad - Errors on btrfs mounted device $i: you will have to replace a disk. Check the status of mounted disks with: btrfs device stats $i" \
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-H "Title: btrfs errors on partition $i of $(hostname)" \
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-H "Priority: high" \
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-H "Tags: warning,boar" \
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$topicurl
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fi
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done
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