From 13943577721a875d0fda097f85c25d7d2ae8b4fb Mon Sep 17 00:00:00 2001 From: Trey Blancher Date: Mon, 7 Aug 2023 22:20:41 -0400 Subject: [PATCH] Initial commit 2023-08-07 --- LICENSE | 674 ++++++++++++++++++++++++++++++++++++++++++++ README.md | 35 +++ psi-alerts.sh | 224 +++++++++++++++ psi-alerts@.service | 13 + psi-monitor.service | 10 + 5 files changed, 956 insertions(+) create mode 100644 LICENSE create mode 100644 README.md create mode 100755 psi-alerts.sh create mode 100644 psi-alerts@.service create mode 100644 psi-monitor.service diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..5944d87 --- /dev/null +++ b/README.md @@ -0,0 +1,35 @@ +# Pressure Stall Information (PSI) - Alerts +## PURPOSE + +This project aims to deliver Pressure Stall Information (PSI) alerts via +standard Linux graphical desktop (through `libnotify` compatible daemons and +CLI programs), and email (email-to-SMS is also supported). This can alert the +system administrator of CPU, I/O, or Memory (RAM) pressure in near real time. + +## PREREQUISITES +* A Linux system with kernel 5.2.0 or greater +* systemd +* zsh +* ssh (OpenSSH, for desktop notifications) +* psi-by-example (a modified version of this is included in this project as a + submodule) + +## INSTALL +First, clone this repository with the `--recurse-submodules` flag: +``` +$ git clone --recurse-submodules https://git.eldon.me/trey/psi-alerts.git +``` + +## CONFIGURE +Included in this project are a number of systemd units: + * psi-monitor.service + * psi-alerts@.service (template service) + +## TODO +* finish INSTALL section + * figure out how we're actually going to build all submodules + * and install them +* finish CONFIGURE section + * about defining an instance and editing it + * `sudo systemctl edit psi-alerts@.service` + * mainly for `Environment=` variables diff --git a/psi-alerts.sh b/psi-alerts.sh new file mode 100755 index 0000000..57c5c57 --- /dev/null +++ b/psi-alerts.sh @@ -0,0 +1,224 @@ +#!/usr/bin/env zsh +# + +svc="psi-monitor.service" +cpu="/proc/pressure/cpu" +mem="/proc/pressure/memory" +io="/proc/pressure/io" +email_to="trey@blancher.net" +sms_dst="2517511550@msg.fi.google.com" +sms_domain="msg.fi.google.com" +port="5999" +ssh_host="localhost" +clear_threshold="5.0" +notification_cmd="dunstify" +notification_opts="--timeout=0 --printid --urgency=critical --icon=/usr/share/icons/breeze-dark/emblems/16/emblem-warning.svg" +id_idx=15 + +print_psi () { + local psi_file="${1}" + cat "${(P)psi_file}" +} + +print_pidstat () { + local psi_type="${1}" + local opts="-l --human" + + case "${psi_type}" in + MEM) + opts="-r ${opts}" + ;; + IO) + opts="-d ${opts}" + ;; + CPU) + opts="-u ${opts}" + ;; + *) + print "Invalid psi_type: ${psi_type}" >&2 + ;; + esac + + pidstat "${opts}" +} + +send_notice () { + local psi_type="${1}" + shift + + local current_alarms="" + if [[ -n "${1}" ]]; then + current_alarms="${1}" + fi + + local psi + case "${psi_type}" in + CPU|MEM|IO) + psi="$(print_psi $(tr '[[:upper:]]' '[[:lower:]]' <<< "${psi_type}"))" + ;; + *) + psi="Multiple alarms, current alarms are ${current_alarms}!" + ;; + esac + + integer dunst_id + if ! dunst_id=$(ssh -q "${ssh_host}" -p ${port} \ + "${notification_cmd} ${notification_opts} 'deltachunk: PSI ${psi_type} triggered!' '${psi}'"); then + print "Connection to dunst failed!" >&2 + false + else + echo ${dunst_id} + true + fi +} + +send () { + if [[ "${#@}" -lt 2 ]] && [[ "${#@}" -gt 3 ]]; then + echo "Wrong number of arguments to send()!" >&2 + return false + fi + + local psi_type="${1}" + shift + + local current_alarms="${1}" + shift + + local dst + if [[ "${current_alarms}" =~ "@" ]]; then + dst="${current_alarms}" + unset current_alarms + else + dst="${1}" + fi + + local psi="$(print_psi $(tr '[[:upper:]]' '[[:lower:]]' <<< ${psi_type}))" + + local subj="PSI on deltachunk ${psi_type} triggered!" + + + local body="Pressure Stall Information triggered on ${psi_type} at $(date +'%FT%T %Z')" + if [[ -n "${current_alarms}" ]]; then + body="${body}\nMultiple alarms triggered: ${current_alarms}" + # if this is not an SMS, include pidstat info + if [[ ! "${dst}" =~ "${sms_domain}" ]]; then + for p in $(tr '|' ' ' <<< "${current_alarms}"); do + body="${body}\n\n$(print_pidstat ${p})" + done + fi + fi + + + local email=$(mktemp /tmp/psi.eml.XXXX) + + cat <<-EOF > ${email} + ${body} + +EOF + + + /usr/bin/mail --resource-files=/ \ + --subject="${subj}" \ + --end-options \ + ${dst} < ${email} +} + +is_clear () { + local psi_type="${1}" + local psi_file="$(tr '[[:upper:]]' '[[:lower:]]' <<< "${psi_type}")" + + local avg10=$(grep some "${(P)psi_file}" | awk '{print $2}' | awk -F= '{print $2}') + local prev=$(grep some "${(P)psi_file}" | awk '{print $5}' | awk -F= '{print $2}') + + + if [[ ${avg10} -lt ${clear_threshold} ]]; then + return 0 + else + return 1 + fi +} + +exec_notices () { + local psi_type="${1}" + shift + local current_alarms="${1}" + + local dunst_id=-1 + if [[ -n "${psi_type}" ]]; then + case "${psi_type}" in + CPU|MEM|IO) + dunst_id=$(send_notice "${psi_type}" "${current_alarms}"); + send "${psi_type}" "${current_alarms}" "${sms_dst}" + send "${psi_type}" "${current_alarms}" "${email_to}" + ;; + *) + echo "Something went wrong!" >&2 + false + ;; + esac + fi + if [[ "${dunst_id}" -ge 0 ]]; then + print "${dunst_id}" + true + else + false + fi +} + +check_dunst_id_is_visible () { + local dunst_id="${1}" + + typeset -a ids + if ids=$(ssh -q "${ssh_host}" -p ${port} \ + "dunstctl history | jq '.data[0][][${id_idx}].data'"); then + echo "Connection to dunst failed!" >&2 + return 2 + fi + + if grep -qP "\b${dunst_id}\b" <<< "${ids}"; then + true + else + false + fi +} +#set -x +local current_alarm="" +local last_alarm="" +typeset -A notice_sent +typeset -A secs +integer last_dunst_id=-1 + +journalctl -b 0 -fu "${svc}" | \ +while read line; do + local psi_type="$(grep -Eo "(CPU|MEM|IO) PSI event" <<< "${line}" | grep -Eo "CPU|MEM|IO")" + if [[ -n "${psi_type}" ]]; then + secs+=(${psi_type} $(date +%s)) + if [[ "${psi_type}" != "${last_alarm}" ]]; then + if [[ ! ${notice_sent[${psi_type}]} ]]; then + last_dunst_id=$(exec_notices "${psi_type}" "${current_alarms}") + notice_sent+=(${psi_type} true) + elif (( last_dunst_id >= 0 )) && ! check_dunst_id_is_visible "${last_dunst_id}"; then + continue + fi + fi + last_alarm="${psi_type}" + if [[ -z "${current_alarms}" ]]; then + current_alarms="${psi_type}" + else + if ! grep -q "${psi_type}" <<< "${current_alarms}"; then + current_alarms="${current_alarms}|${psi_type}" + fi + fi + else + typeset -a alarms=( $(tr '|' ' ' <<< "$current_alarms") ) + for alarm in ${alarms}; do + integer elapsed=$(( $(date +%s) - ${secs[${alarm}]} )) + if is_clear "${alarm}" && (( elapsed > 300 )); then + current_alarms=$(sed -E "s/${alarm}\|?//" <<< "${current_alarms}") + last_alarm=$(awk -F'|' '{print $NF}' <<< "${current_alarms}") + fi + done + fi +done +#set +x + diff --git a/psi-alerts@.service b/psi-alerts@.service new file mode 100644 index 0000000..5d8c07b --- /dev/null +++ b/psi-alerts@.service @@ -0,0 +1,13 @@ +[Unit] +Description=Pressure Stall Information (PSI) alerts +PartOf=multi-user.target +After=psi-monitor.service + +[Service] +User=%i +Type=simple +ExecStart=psi-alert.sh + +[Install] +WantedBy=multi-user.target + diff --git a/psi-monitor.service b/psi-monitor.service new file mode 100644 index 0000000..4d24042 --- /dev/null +++ b/psi-monitor.service @@ -0,0 +1,10 @@ +[Unit] +Description=Pressure Stall Information (PSI) Monitor +PartOf=multi-user.target + +[Service] +Type=simple +ExecStart=/usr/local/sbin/psi-monitor + +[Install] +WantedBy=multi-user.target