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Merged
vkucera merged 1 commit into from
Mar 23, 2026
Merged

Simplify monitoring functions #46

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80 changes: 44 additions & 36 deletions monitor_system.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@ FILE_BASE="$HOME/monitor-logs"

TITLE_WARNING="**:warning: $HOSTNAME warning**\n"

# Scheduled restart
TIME_RESTART="2026-03-15 08:00:00"
TIME_REMINDER_RESTART="10" # minutes before restart to send a reminder

Expand All @@ -38,56 +39,63 @@ notify_mattermost() {
check_memory() {
local memory_total
local memory_available
local message=""
local memory_min
local message
local logfile
local report_once=1
memory_total="$(free | grep Mem | awk '{print $2}')"
memory_available="$(free | grep Mem | awk '{print $7}')"
local notify=0
if [[ "$HARD" -eq 1 ]]; then
local logfile="${FILE_BASE}/memory_full"
logfile="${FILE_BASE}/memory_full"
memory_min=$((MEMORY_LIMIT_HARD * memory_total / 100))
if ((memory_available < memory_min)); then
[[ -f "${logfile}" ]] && return 0
message="${TITLE_WARNING}@all Available memory is almost **EXHAUSTED**: $((memory_available/1048576)) GiB (threshold $((memory_min/1048576)) GiB)"
notify=1
date +"%F_%H-%M-%S" > "${logfile}"
else
rm -f "${logfile}"
fi
message="${TITLE_WARNING}@all Available memory is almost **EXHAUSTED**: $((memory_available / 1048576)) GiB (threshold $((memory_min / 1048576)) GiB)"
else
memory_min=$((MEMORY_LIMIT_SOFT * memory_total /100))
if ((memory_available < memory_min)); then
message="${TITLE_WARNING}@all Available memory is low: $((memory_available/1048576)) GiB (threshold $((memory_min/1048576)) GiB)"
notify=1
fi
logfile="${FILE_BASE}/memory_getting_full"
memory_min=$((MEMORY_LIMIT_SOFT * memory_total / 100))
message="${TITLE_WARNING}@all Available memory is low: $((memory_available / 1048576)) GiB (threshold $((memory_min / 1048576)) GiB)"
fi
if [[ $notify -eq 1 ]]; then
local text="${message}\n"
text+="\n| user | usage [GiB] |\n|---|---|\n"
text+="$(ps S -e --no-headers -o user:20,pss | awk '{m[$1] += $2; m["total"] += $2} END{for(u in m) {print u, m[u]}}' | sort -rnk 2 | head -5 | awk '{printf "| %s | %.0f |\\n", $1, $2/1048576}')"
notify_mattermost "$text"
if ((memory_available >= memory_min)); then
rm -f "${logfile}"
return 0
fi
if [[ -f "${logfile}" && "$report_once" -eq 1 ]]; then
return 0
fi
date +"%F_%H-%M-%S" > "${logfile}"
local text="${message}\n"
text+="\n| user | usage [GiB] |\n|---|---|\n"
text+="$(ps S -e --no-headers -o user:20,pss | awk '{m[$1] += $2; m["total"] += $2} END{for(u in m) {print u, m[u]}}' | sort -rnk 2 | head -5 | awk '{printf "| %s | %.0f |\\n", $1, $2 / 1048576}')"
notify_mattermost "$text"
}

check_disk() {
local path="$1"
local disk_use
disk_use=$(df "${path}" | awk '{print $5}' | tail -n1)
disk_use=${disk_use%'%'}
local space_used
local space_max
local message
local logfile
local report_once=1
space_used=$(df "${path}" | awk '{print $5}' | tail -n1)
space_used=${space_used%'%'}
if [[ "$HARD" -eq 1 ]]; then
local logfile="${FILE_BASE}/${path}/disk_full"
mkdir -p "${FILE_BASE}/${path}"
if ((disk_use > DISK_LIMIT_HARD)); then
[[ -f "${logfile}" ]] && return 0
notify_mattermost "${TITLE_WARNING}@all Disk in ${path} is **FULL**: ${disk_use} % (threshold ${DISK_LIMIT_SOFT} %)"
date +"%F_%H-%M-%S" > "${logfile}"
else
rm -f "${logfile}"
fi
logfile="${FILE_BASE}/${path}/disk_full"
space_max=$DISK_LIMIT_HARD
message="${TITLE_WARNING}@all Disk in ${path} is **FULL**: ${space_used} % (threshold ${space_max} %)"
else
if ((disk_use > DISK_LIMIT_SOFT)); then
notify_mattermost "${TITLE_WARNING}@all Disk usage in ${path} is high: ${disk_use} % (threshold ${DISK_LIMIT_SOFT} %)"
fi
logfile="${FILE_BASE}/${path}/disk_getting_full"
space_max=$DISK_LIMIT_SOFT
message="${TITLE_WARNING}@all Disk usage in ${path} is high: ${space_used} % (threshold ${space_max} %)"
fi
if ((space_used <= space_max)); then
rm -f "${logfile}"
return 0
fi
if [[ -f "${logfile}" && "$report_once" -eq 1 ]]; then
return 0
fi
mkdir -p "${FILE_BASE}/${path}"
date +"%F_%H-%M-%S" > "${logfile}"
notify_mattermost "$message"
}

check_processes() {
Expand Down