141 lines
3.8 KiB
Bash
141 lines
3.8 KiB
Bash
#!/bin/bash
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# Copyright (C) 2026 Cédric Abonnel
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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MONITORING_LIB_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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MONITORING_BASE_DIR="$(cd "${MONITORING_LIB_DIR}/.." && pwd)"
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MONITORING_CONF_DIR="${MONITORING_BASE_DIR}/conf"
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# Chargement config globale
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if [ -f "${MONITORING_CONF_DIR}/monitoring.conf" ]; then
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# shellcheck source=/dev/null
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. "${MONITORING_CONF_DIR}/monitoring.conf"
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fi
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SCRIPT_NAME="${SCRIPT_NAME:-$(basename "$0")}"
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SCRIPT_PATH="${SCRIPT_PATH:-$(readlink -f "$0" 2>/dev/null || realpath "$0" 2>/dev/null || echo "$0")}"
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STATUS_OK=0
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STATUS_WARNING=1
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STATUS_ERROR=2
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STATUS_INTERNAL=3
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CURRENT_STATUS=$STATUS_OK
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LOG_LEVEL=${LOG_LEVEL:-INFO}
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json_escape() {
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local s="${1:-}"
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s="${s//\\/\\\\}"
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s="${s//\"/\\\"}"
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s="${s//$'\n'/\\n}"
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s="${s//$'\r'/\\r}"
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s="${s//$'\t'/\\t}"
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printf '%s' "$s"
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}
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log_event() {
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local level="$1"
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local event="$2"
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local message="$3"
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shift 3
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local ts extra key value kv
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ts="$(date --iso-8601=seconds)"
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extra=""
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for kv in "$@"; do
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key="${kv%%=*}"
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value="${kv#*=}"
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extra="${extra},\"$(json_escape "$key")\":\"$(json_escape "$value")\""
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done
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printf '{"ts":"%s","host":"%s","app":"%s","level":"%s","event":"%s","message":"%s"%s}\n' \
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"$(json_escape "$ts")" \
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"$(json_escape "${HOSTNAME_FQDN:-unknown}")" \
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"$(json_escape "$SCRIPT_NAME")" \
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"$(json_escape "$level")" \
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"$(json_escape "$event")" \
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"$(json_escape "$message")" \
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"$extra" >> "${LOG_FILE:-/var/log/monitoring/events.jsonl}"
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}
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set_status() {
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local new_status="$1"
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if [ "$new_status" -gt "$CURRENT_STATUS" ]; then
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CURRENT_STATUS="$new_status"
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fi
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}
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log_debug() { log_event "DEBUG" "$@"; }
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log_info() { log_event "INFO" "$@"; }
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log_notice() { log_event "NOTICE" "$@"; }
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log_warning() { log_event "WARNING" "$@"; set_status "$STATUS_WARNING"; }
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log_error() { log_event "ERROR" "$@"; set_status "$STATUS_ERROR"; }
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log_critical() { log_event "CRITICAL" "$@"; set_status "$STATUS_ERROR"; }
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fail_internal() {
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log_event "ERROR" "internal_error" "$1"
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exit "$STATUS_INTERNAL"
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}
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exit_with_status() {
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exit "$CURRENT_STATUS"
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}
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require_cmd() {
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local cmd
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for cmd in "$@"; do
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command -v "$cmd" >/dev/null 2>&1 || fail_internal "Commande requise absente: $cmd"
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done
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}
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load_conf_if_exists() {
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local conf="$1"
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[ -f "$conf" ] && . "$conf"
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}
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lock_or_exit() {
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local lock_name="${1:-$SCRIPT_NAME}"
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local lock_file="${MONITORING_LOCK_DIR:-/var/lock/monitoring}/${lock_name}.lock"
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exec 9>"$lock_file" || fail_internal "Impossible d'ouvrir le lock $lock_file"
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flock -n 9 || {
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log_notice "already_running" "Une autre instance est déjà en cours" "lock=$lock_file"
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exit 0
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}
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}
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threshold_level() {
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local value="$1"
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local warning="$2"
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local critical="$3"
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if [ "$value" -ge "$critical" ]; then
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printf 'CRITICAL'
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elif [ "$value" -ge "$warning" ]; then
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printf 'WARNING'
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else
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printf 'INFO'
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fi
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}
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safe_mv() {
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local src="$1"
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local dst="$2"
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mv -f "$src" "$dst" || fail_internal "Échec du déplacement de $src vers $dst"
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}
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ensure_parent_dir() {
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local file="$1"
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mkdir -p "$(dirname "$file")" || fail_internal "Impossible de créer le répertoire parent de $file"
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} |