583 lines
25 KiB
Bash
583 lines
25 KiB
Bash
#!/bin/bash
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# -----------------------------------------------------------------------------------------------
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# --------------------------------- Docker Watchdog --------------------------------------------
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# -----------------------------------------------------------------------------------------------
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# Two-tier self-healing container monitoring system — runs continuously as a background process.
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# Started by array_start.sh at array start — runs until array stops or SIGTERM received.
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#
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# Tier 1 — Strict monitoring (configured containers only)
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# Memory hard limits — immediate restart if exceeded
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# CPU thresholds — strike system, restart after CPU_FAIL_LIMIT strikes
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# HTTP responsiveness — strike system, restart after RESP_FAIL_LIMIT strikes
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# Required containers — must always be running, strike system with skip list
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#
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# Tier 2 — Global health scan (all running containers)
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# Unhealthy status — Docker HEALTHCHECK unhealthy → restart
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# OOM killed — kernel killed container → restart + notify
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# Crash loop detection — RestartCount climbing → notify, critical above limit
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# Dead containers — remove and restart
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# Unexpected exits — non-zero exit code → restart
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#
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# Cross-cutting intelligence:
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# Startup grace period — skip restarts while system is still booting
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# Dependency ordering — restart database before app
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# Restart loop protect — stop restarting after X restarts in X hours → skip list
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# Skip list auto-clear — clears when container recovers
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# Notification batching — one clean summary per cycle, not one ping per event
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# Quiet when healthy — only logs when something needs attention
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# Parity awareness — skips restarts during parity check
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#
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# Continuous loop:
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# Checks run every DOCKER_WATCHDOG_INTERVAL seconds (default 900 = 15min)
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# Clean shutdown on SIGTERM/SIGINT — sent by array stop
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# Variables scoped per-cycle — no state accumulation between cycles
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#
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# State files:
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# WATCHDOG_STATE_FILE — strike counts (/tmp — resets on reboot)
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# SYS_WATCHDOG_FAILED_FILE — persistent skip list (/boot — survives reboots)
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# WATCHDOG_CONTAINER_RESTART_LOG — restart history for loop detection
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#
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# All configuration in Master.conf under Docker Watchdog section.
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# Supports --dry-run and --status.
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# -----------------------------------------------------------------------------------------------
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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source "$SCRIPT_DIR/../Master.conf"
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source "$SCRIPT_DIR/../common.sh"
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parse_args "$@"
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# -----------------------------------------------------------------------------------------------
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# ━━━ $ICON_GEAR Setup — runs once at start ━━━
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# -----------------------------------------------------------------------------------------------
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echo ""
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echo "━━━ $ICON_GEAR Setup ━━━"
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if [[ "$EUID" -ne 0 ]]; then
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error "Must be run as root"
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exit 1
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fi
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success "Running as root"
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acquire_lock "continuous"
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# Select correct per-host watchdog lists — done once at startup
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detect_hosts
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if [[ "$LOCAL_SERVER_NAME" == "$HOST1" ]]; then
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WATCHDOG_REQUIRED_CONTAINERS=("${HOST1_WATCHDOG_REQUIRED_CONTAINERS[@]}")
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declare -A WATCHDOG_CONTAINER_URLS
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for key in "${!HOST1_WATCHDOG_CONTAINER_URLS[@]}"; do
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WATCHDOG_CONTAINER_URLS["$key"]="${HOST1_WATCHDOG_CONTAINER_URLS[$key]}"
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done
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else
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WATCHDOG_REQUIRED_CONTAINERS=("${HOST2_WATCHDOG_REQUIRED_CONTAINERS[@]}")
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declare -A WATCHDOG_CONTAINER_URLS
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for key in "${!HOST2_WATCHDOG_CONTAINER_URLS[@]}"; do
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WATCHDOG_CONTAINER_URLS["$key"]="${HOST2_WATCHDOG_CONTAINER_URLS[$key]}"
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done
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fi
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info "Watchdog running as: $LOCAL_SERVER_NAME"
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info "Check interval: ${DOCKER_WATCHDOG_INTERVAL}s"
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if ! command -v docker >/dev/null 2>&1; then
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error "Docker not found"
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exit 1
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fi
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success "Docker found"
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[[ "$DRY_RUN" == true ]] && warn "DRY RUN — no containers will be restarted"
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# Ensure state files exist
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touch "$WATCHDOG_STATE_FILE" "$WATCHDOG_CONTAINER_RESTART_LOG" \
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"$SYS_WATCHDOG_FAILED_FILE" 2>/dev/null
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# -----------------------------------------------------------------------------------------------
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# ━━━ $ICON_SUMMARY Status ━━━
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# -----------------------------------------------------------------------------------------------
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if [[ "$SHOW_STATUS" == true ]]; then
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echo ""
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echo "━━━━━ $ICON_SUMMARY STATUS ━━━━━"
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echo "$ICON_CONTAINERS Watched: ${!WATCHDOG_CONTAINERS[@]}"
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echo "$ICON_CONTAINERS Required: ${WATCHDOG_REQUIRED_CONTAINERS[*]}"
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echo "$ICON_WATCHDOG Scan all: $WATCHDOG_SCAN_ALL"
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echo "$ICON_WATCHDOG Interval: ${DOCKER_WATCHDOG_INTERVAL}s"
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echo "$ICON_WATCHDOG Startup grace: ${WATCHDOG_STARTUP_GRACE}s"
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echo "$ICON_WATCHDOG Restart limit: $WATCHDOG_CONTAINER_RESTART_LIMIT in ${WATCHDOG_CONTAINER_RESTART_WINDOW}h"
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echo "$ICON_WATCHDOG Batch notify: $WATCHDOG_BATCH_NOTIFY"
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echo "$ICON_WATCHDOG Ignore list: ${WATCHDOG_SCAN_IGNORE[*]:-none}"
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echo "$ICON_GEAR Dry Run: $DRY_RUN"
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UPTIME_S=$(awk '{print int($1)}' /proc/uptime)
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echo "$ICON_TIME System uptime: $(format_duration $UPTIME_S)"
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[[ "$UPTIME_S" -lt "$WATCHDOG_STARTUP_GRACE" ]] && \
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warn "Within startup grace period — restarts suppressed"
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echo "━━━━━━━━━━━━━━━━━━━━━━━"
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exit 0
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fi
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# -----------------------------------------------------------------------------------------------
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# HELPERS — defined once, used every cycle
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# -----------------------------------------------------------------------------------------------
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get_strikes() {
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grep "^${1}:" "${2}" 2>/dev/null | cut -d: -f2 || echo "0"
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}
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set_strikes() {
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local container="$1" count="$2" file="$3"
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if grep -q "^${container}:" "$file" 2>/dev/null; then
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sed -i "s/^${container}:.*/${container}:${count}/" "$file"
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else
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echo "${container}:${count}" >> "$file"
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fi
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}
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is_skipped() {
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grep -q "^${1}$" "$SYS_WATCHDOG_FAILED_FILE" 2>/dev/null
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}
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add_to_skip_list() {
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local container="$1" reason="$2"
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if ! is_skipped "$container"; then
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echo "$container" >> "$SYS_WATCHDOG_FAILED_FILE"
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error "$container added to skip list — $reason"
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queue_notify "$container added to skip list on $(hostname) — $reason — manual intervention needed" "critical"
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fi
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}
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remove_from_skip_list() {
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sed -i "/^${1}$/d" "$SYS_WATCHDOG_FAILED_FILE" 2>/dev/null
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success "$1 removed from skip list — recovered"
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}
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log_restart() {
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local container="$1"
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local now
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now=$(date '+%Y-%m-%d %H:%M:%S')
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local cutoff
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cutoff=$(date -d "${WATCHDOG_CONTAINER_RESTART_WINDOW} hours ago" '+%Y-%m-%d %H:%M:%S')
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echo "${container}|${now}" >> "$WATCHDOG_CONTAINER_RESTART_LOG"
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local tmp="${WATCHDOG_CONTAINER_RESTART_LOG}.tmp"
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awk -F'|' -v cutoff="$cutoff" '$2 >= cutoff' \
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"$WATCHDOG_CONTAINER_RESTART_LOG" > "$tmp" && \
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mv "$tmp" "$WATCHDOG_CONTAINER_RESTART_LOG"
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}
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get_restart_count() {
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local container="$1"
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local cutoff
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cutoff=$(date -d "${WATCHDOG_CONTAINER_RESTART_WINDOW} hours ago" '+%Y-%m-%d %H:%M:%S')
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awk -F'|' -v c="$container" -v cutoff="$cutoff" \
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'$1==c && $2>=cutoff' "$WATCHDOG_CONTAINER_RESTART_LOG" 2>/dev/null | wc -l
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}
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dependencies_satisfied() {
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local container="$1"
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local deps="${WATCHDOG_DEPENDENCIES[$container]:-}"
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[[ -z "$deps" ]] && return 0
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for dep in $deps; do
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local status
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status=$(docker inspect -f '{{.State.Running}}' "$dep" 2>/dev/null)
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if [[ "$status" != "true" ]]; then
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warn "$container — dependency $dep is not running — skipping restart this cycle"
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return 1
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fi
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done
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return 0
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}
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safe_restart() {
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local container="$1" reason="$2"
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local restart_count
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restart_count=$(get_restart_count "$container")
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if [[ "$restart_count" -ge "$WATCHDOG_CONTAINER_RESTART_LIMIT" ]]; then
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add_to_skip_list "$container" \
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"restarted $restart_count times in ${WATCHDOG_CONTAINER_RESTART_WINDOW}h"
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return 2
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fi
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dependencies_satisfied "$container" || return 1
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local uptime_s
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uptime_s=$(awk '{print int($1)}' /proc/uptime)
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if [[ "$uptime_s" -lt "$WATCHDOG_STARTUP_GRACE" ]]; then
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warn "$container — within startup grace period — skipping restart"
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return 1
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fi
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if [[ "$DRY_RUN" == true ]]; then
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warn "DRY RUN — would restart $container ($reason)"
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return 0
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fi
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info "Restarting $container ($reason) [restart $((restart_count + 1))/$WATCHDOG_CONTAINER_RESTART_LIMIT in window]..."
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if docker restart "$container" >/dev/null 2>&1; then
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success "$ICON_STARTED $container restarted"
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log_restart "$container"
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return 0
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else
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error "Failed to restart $container"
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return 1
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fi
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}
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queue_notify() {
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local message="$1" severity="${2:-warning}"
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NOTIFY_EVENTS+=("${severity}|${message}")
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log "Queued: $message"
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}
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flush_notify() {
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[[ ${#NOTIFY_EVENTS[@]} -eq 0 ]] && return
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if [[ "$WATCHDOG_BATCH_NOTIFY" == "true" ]]; then
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local highest_severity="normal"
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local messages=()
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for event in "${NOTIFY_EVENTS[@]}"; do
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local sev="${event%%|*}" msg="${event#*|}"
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messages+=("$msg")
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[[ "$sev" == "critical" ]] && highest_severity="warning"
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[[ "$sev" == "warning" && "$highest_severity" == "normal" ]] && highest_severity="warning"
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done
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local summary
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summary=$(printf '%s. ' "${messages[@]}")
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notify "Docker Watchdog on $(hostname) — ${#NOTIFY_EVENTS[@]} event(s): $summary" \
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"Docker Watchdog" "$highest_severity"
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else
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for event in "${NOTIFY_EVENTS[@]}"; do
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local sev="${event%%|*}" msg="${event#*|}"
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[[ "$sev" == "critical" ]] && sev="warning"
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notify "$msg" "Docker Watchdog" "$sev"
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done
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fi
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NOTIFY_EVENTS=()
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}
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is_parity_running() {
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grep -q "progress" /var/local/emhttp/parity-date.txt 2>/dev/null
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}
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# -----------------------------------------------------------------------------------------------
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# CLEAN SHUTDOWN — trap SIGTERM/SIGINT from array stop
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# -----------------------------------------------------------------------------------------------
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WATCHDOG_RUNNING=true
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cleanup() {
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echo ""
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info "Docker watchdog received shutdown signal — stopping cleanly"
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WATCHDOG_RUNNING=false
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exit 0
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}
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trap cleanup SIGTERM SIGINT
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# -----------------------------------------------------------------------------------------------
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# ━━━ CONTINUOUS MONITORING LOOP ━━━
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# -----------------------------------------------------------------------------------------------
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info "Docker watchdog started — checking every ${DOCKER_WATCHDOG_INTERVAL}s"
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echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
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CYCLE=0
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while [[ "$WATCHDOG_RUNNING" == true ]]; do
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((CYCLE++))
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CYCLE_START=$(date +%s)
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# Re-source Master.conf each cycle — picks up any config changes without restart
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source "$SCRIPT_DIR/../Master.conf"
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# Rebuild per-host lists after re-source in case they changed
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if [[ "$LOCAL_SERVER_NAME" == "$HOST1" ]]; then
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WATCHDOG_REQUIRED_CONTAINERS=("${HOST1_WATCHDOG_REQUIRED_CONTAINERS[@]}")
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for key in "${!HOST1_WATCHDOG_CONTAINER_URLS[@]}"; do
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WATCHDOG_CONTAINER_URLS["$key"]="${HOST1_WATCHDOG_CONTAINER_URLS[$key]}"
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done
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else
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WATCHDOG_REQUIRED_CONTAINERS=("${HOST2_WATCHDOG_REQUIRED_CONTAINERS[@]}")
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for key in "${!HOST2_WATCHDOG_CONTAINER_URLS[@]}"; do
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WATCHDOG_CONTAINER_URLS["$key"]="${HOST2_WATCHDOG_CONTAINER_URLS[$key]}"
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done
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fi
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# Per-cycle variables — cleared each iteration, no accumulation
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NOTIFY_EVENTS=()
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T1_RESTARTS=0
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T1_WARNINGS=0
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T2_RESTARTS=0
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T2_WARNINGS=0
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# Rebuild ignore map each cycle in case config was updated
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declare -A IGNORE_MAP
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for c in "${WATCHDOG_SCAN_IGNORE[@]}"; do
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[[ -n "$c" ]] && IGNORE_MAP["$c"]=1
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done
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# Startup grace check
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UPTIME_SECONDS=$(awk '{print int($1)}' /proc/uptime)
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IN_GRACE_PERIOD=false
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if [[ "$UPTIME_SECONDS" -lt "$WATCHDOG_STARTUP_GRACE" ]]; then
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IN_GRACE_PERIOD=true
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fi
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# Parity check — skip restarts during parity to avoid I/O interference
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if is_parity_running; then
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log "Parity check in progress — skipping restart actions this cycle"
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sleep "$DOCKER_WATCHDOG_INTERVAL"
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continue
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fi
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# ── TIER 1 — Strict Monitoring ──────────────────────────────────────────────────────────
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# Required containers
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if [[ ${#WATCHDOG_REQUIRED_CONTAINERS[@]} -gt 0 ]]; then
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for container in "${WATCHDOG_REQUIRED_CONTAINERS[@]}"; do
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[[ -z "$container" ]] && continue
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STATUS=$(docker inspect -f '{{.State.Running}}' "$container" 2>/dev/null)
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if is_skipped "$container"; then
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if [[ "$STATUS" == "true" ]]; then
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remove_from_skip_list "$container"
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set_strikes "$container" 0 "$WATCHDOG_STATE_FILE"
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sed -i "/^${container}|/d" "$WATCHDOG_CONTAINER_RESTART_LOG" 2>/dev/null
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queue_notify "$container recovered on $(hostname) — removed from skip list" "normal"
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else
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warn "$container — on skip list, manual intervention needed"
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fi
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continue
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fi
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if [[ "$STATUS" == "true" ]]; then
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set_strikes "$container" 0 "$WATCHDOG_STATE_FILE"
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else
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STRIKES=$(get_strikes "$container" "$WATCHDOG_STATE_FILE")
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STRIKES=$(( STRIKES + 1 ))
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set_strikes "$container" "$STRIKES" "$WATCHDOG_STATE_FILE"
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warn "$container — not running (strike $STRIKES/$SYS_WATCHDOG_STRIKE_LIMIT)"
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((T1_WARNINGS++))
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if [[ "$STRIKES" -ge "$SYS_WATCHDOG_STRIKE_LIMIT" ]]; then
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result=0
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safe_restart "$container" "required container down" || result=$?
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case $result in
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0) set_strikes "$container" 0 "$WATCHDOG_STATE_FILE"
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((T1_RESTARTS++))
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queue_notify "$container was down and restarted on $(hostname)" "warning" ;;
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2) : ;;
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*) queue_notify "$container failed to restart on $(hostname)" "warning" ;;
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esac
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fi
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fi
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done
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fi
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# Memory and CPU monitoring
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if [[ ${#WATCHDOG_CONTAINERS[@]} -gt 0 ]]; then
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STATS=$(docker stats --no-stream \
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--format "{{.Name}}|{{.MemUsage}}|{{.CPUPerc}}" 2>/dev/null)
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TOTAL_CORES=$(nproc 2>/dev/null || echo 1)
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for container in "${!WATCHDOG_CONTAINERS[@]}"; do
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MEM_LIMIT_MB="${WATCHDOG_CONTAINERS[$container]}"
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CONTAINER_STATS=$(echo "$STATS" | grep "^${container}|" | head -1)
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[[ -z "$CONTAINER_STATS" ]] && continue
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MEM_USAGE=$(echo "$CONTAINER_STATS" | cut -d'|' -f2 | awk '{print $1}')
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MEM_UNIT=$(echo "$MEM_USAGE" | grep -oE '[A-Za-z]+')
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MEM_VALUE=$(echo "$MEM_USAGE" | grep -oE '[0-9.]+')
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case "$MEM_UNIT" in
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GiB|GB) MEM_MB=$(awk "BEGIN {printf \"%.0f\", $MEM_VALUE * 1024}") ;;
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MiB|MB) MEM_MB=$(awk "BEGIN {printf \"%.0f\", $MEM_VALUE}") ;;
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KiB|KB) MEM_MB=$(awk "BEGIN {printf \"%.0f\", $MEM_VALUE / 1024}") ;;
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*) MEM_MB=0 ;;
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esac
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CPU_RAW=$(echo "$CONTAINER_STATS" | cut -d'|' -f3 | tr -d '%')
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CPU_NORM=$(awk "BEGIN {printf \"%.1f\", $CPU_RAW / $TOTAL_CORES}")
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CPU_INT=$(printf "%.0f" "$CPU_NORM")
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if [[ "$MEM_MB" -ge "$MEM_LIMIT_MB" ]]; then
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error "$container — memory exceeded hard limit ${MEM_LIMIT_MB}MB"
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safe_restart "$container" "memory hard limit exceeded"
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((T1_RESTARTS++))
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queue_notify "$container exceeded memory limit on $(hostname) — restarted" "warning"
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fi
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if [[ "$CPU_INT" -ge "$HARD_CPU_THRESHOLD" ]]; then
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CPU_STRIKES=$(get_strikes "${container}_cpu" "$WATCHDOG_STATE_FILE")
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CPU_STRIKES=$(( CPU_STRIKES + 1 ))
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set_strikes "${container}_cpu" "$CPU_STRIKES" "$WATCHDOG_STATE_FILE"
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if [[ "$CPU_STRIKES" -ge "$CPU_FAIL_LIMIT" ]]; then
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safe_restart "$container" "CPU threshold exceeded"
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set_strikes "${container}_cpu" 0 "$WATCHDOG_STATE_FILE"
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((T1_RESTARTS++))
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queue_notify "$container CPU ${CPU_NORM}% on $(hostname) — restarted" "warning"
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fi
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else
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set_strikes "${container}_cpu" 0 "$WATCHDOG_STATE_FILE"
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fi
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done
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fi
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# HTTP responsiveness
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if [[ ${#WATCHDOG_CONTAINER_URLS[@]} -gt 0 ]]; then
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for container in "${!WATCHDOG_CONTAINER_URLS[@]}"; do
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URL="${WATCHDOG_CONTAINER_URLS[$container]}"
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if curl -sf --max-time "$CURL_TIMEOUT" "$URL" >/dev/null 2>&1; then
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set_strikes "${container}_http" 0 "$WATCHDOG_STATE_FILE"
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else
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HTTP_STRIKES=$(get_strikes "${container}_http" "$WATCHDOG_STATE_FILE")
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HTTP_STRIKES=$(( HTTP_STRIKES + 1 ))
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set_strikes "${container}_http" "$HTTP_STRIKES" "$WATCHDOG_STATE_FILE"
|
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warn "$container — not responding at $URL (strike $HTTP_STRIKES/$RESP_FAIL_LIMIT)"
|
|
((T1_WARNINGS++))
|
|
if [[ "$HTTP_STRIKES" -ge "$RESP_FAIL_LIMIT" ]]; then
|
|
safe_restart "$container" "HTTP unresponsive"
|
|
set_strikes "${container}_http" 0 "$WATCHDOG_STATE_FILE"
|
|
((T1_RESTARTS++))
|
|
queue_notify "$container unresponsive at $URL on $(hostname) — restarted" "warning"
|
|
fi
|
|
fi
|
|
done
|
|
fi
|
|
|
|
# ── TIER 2 — Global Health Scan ─────────────────────────────────────────────────────────
|
|
if [[ "$WATCHDOG_SCAN_ALL" == "true" ]]; then
|
|
ALL_CONTAINERS=$(docker ps --format "{{.Names}}" 2>/dev/null)
|
|
|
|
# Unhealthy containers
|
|
if [[ "$WATCHDOG_RESTART_UNHEALTHY" == "true" ]]; then
|
|
UNHEALTHY=$(docker ps --filter health=unhealthy --format "{{.Names}}" 2>/dev/null)
|
|
while IFS= read -r container; do
|
|
[[ -z "$container" ]] && continue
|
|
[[ -n "${IGNORE_MAP[$container]:-}" ]] && continue
|
|
is_skipped "$container" && continue
|
|
error "$container — unhealthy"
|
|
((T2_WARNINGS++))
|
|
result=0
|
|
safe_restart "$container" "unhealthy health status" || result=$?
|
|
[[ $result -eq 0 ]] && ((T2_RESTARTS++)) && \
|
|
queue_notify "$container unhealthy on $(hostname) — restarted" "warning"
|
|
done <<< "$UNHEALTHY"
|
|
fi
|
|
|
|
# OOM killed
|
|
if [[ "$WATCHDOG_NOTIFY_OOM" == "true" ]]; then
|
|
while IFS= read -r container; do
|
|
[[ -z "$container" ]] && continue
|
|
[[ -n "${IGNORE_MAP[$container]:-}" ]] && continue
|
|
is_skipped "$container" && continue
|
|
OOM=$(docker inspect -f '{{.State.OOMKilled}}' "$container" 2>/dev/null)
|
|
if [[ "$OOM" == "true" ]]; then
|
|
error "$container — OOM killed"
|
|
((T2_WARNINGS++))
|
|
result=0
|
|
safe_restart "$container" "OOM killed" || result=$?
|
|
[[ $result -eq 0 ]] && ((T2_RESTARTS++)) && \
|
|
queue_notify "$container OOM killed on $(hostname) — restarted" "warning"
|
|
fi
|
|
done <<< "$ALL_CONTAINERS"
|
|
fi
|
|
|
|
# Crash loop detection
|
|
if [[ "$WATCHDOG_NOTIFY_CRASHLOOP" == "true" ]]; then
|
|
while IFS= read -r container; do
|
|
[[ -z "$container" ]] && continue
|
|
[[ -n "${IGNORE_MAP[$container]:-}" ]] && continue
|
|
is_skipped "$container" && continue
|
|
RESTART_COUNT=$(docker inspect -f '{{.RestartCount}}' "$container" 2>/dev/null || echo 0)
|
|
PREV_COUNT=$(grep "^${container}_docker:" "$WATCHDOG_STATE_FILE" 2>/dev/null | cut -d: -f2 || echo 0)
|
|
set_strikes "${container}_docker" "$RESTART_COUNT" "$WATCHDOG_STATE_FILE"
|
|
if [[ "$RESTART_COUNT" -gt "$PREV_COUNT" && "$RESTART_COUNT" -gt 0 ]]; then
|
|
((T2_WARNINGS++))
|
|
if [[ "$RESTART_COUNT" -ge "$WATCHDOG_CRASH_LIMIT" ]]; then
|
|
error "$container — crash loop CRITICAL: $RESTART_COUNT restarts"
|
|
queue_notify "$container crash loop CRITICAL on $(hostname) — manual intervention needed" "critical"
|
|
else
|
|
warn "$container — restarted since last check (total: $RESTART_COUNT)"
|
|
queue_notify "$container restarted on $(hostname) — count: $RESTART_COUNT" "warning"
|
|
fi
|
|
fi
|
|
done <<< "$ALL_CONTAINERS"
|
|
fi
|
|
|
|
# Dead containers
|
|
if [[ "$WATCHDOG_RESTART_DEAD" == "true" ]]; then
|
|
DEAD=$(docker ps -a --filter status=dead --format "{{.Names}}" 2>/dev/null)
|
|
while IFS= read -r container; do
|
|
[[ -z "$container" ]] && continue
|
|
[[ -n "${IGNORE_MAP[$container]:-}" ]] && continue
|
|
is_skipped "$container" && continue
|
|
error "$container — dead"
|
|
((T2_WARNINGS++))
|
|
RESTART_COUNT=$(get_restart_count "$container")
|
|
if [[ "$RESTART_COUNT" -ge "$WATCHDOG_CONTAINER_RESTART_LIMIT" ]]; then
|
|
add_to_skip_list "$container" "dead — restarted $RESTART_COUNT times"
|
|
elif [[ "$DRY_RUN" == false ]]; then
|
|
docker rm "$container" >/dev/null 2>&1
|
|
if docker start "$container" >/dev/null 2>&1; then
|
|
success "$container removed from dead state and restarted"
|
|
log_restart "$container"
|
|
((T2_RESTARTS++))
|
|
queue_notify "$container was dead on $(hostname) — restarted" "warning"
|
|
fi
|
|
fi
|
|
done <<< "$DEAD"
|
|
fi
|
|
|
|
# Unexpected exits
|
|
if [[ "$WATCHDOG_RESTART_CRASHED" == "true" ]]; then
|
|
CRASHED=$(docker ps -a \
|
|
--filter status=exited \
|
|
--format "{{.Names}}|{{.Status}}" 2>/dev/null | \
|
|
grep -v "Exited (0)")
|
|
while IFS='|' read -r container status; do
|
|
[[ -z "$container" ]] && continue
|
|
[[ -n "${IGNORE_MAP[$container]:-}" ]] && continue
|
|
is_skipped "$container" && continue
|
|
SKIP=false
|
|
for req in "${WATCHDOG_REQUIRED_CONTAINERS[@]}"; do
|
|
[[ "$container" == "$req" ]] && SKIP=true && break
|
|
done
|
|
[[ "$SKIP" == true ]] && continue
|
|
error "$container — $status (unexpected exit)"
|
|
((T2_WARNINGS++))
|
|
result=0
|
|
safe_restart "$container" "unexpected exit" || result=$?
|
|
[[ $result -eq 0 ]] && ((T2_RESTARTS++)) && \
|
|
queue_notify "$container crashed on $(hostname) ($status) — restarted" "warning"
|
|
done <<< "$CRASHED"
|
|
fi
|
|
fi
|
|
|
|
# Send notifications if any events this cycle
|
|
flush_notify
|
|
|
|
# Only log summary if something happened — quiet when all healthy
|
|
TOTAL_RESTARTS=$(( T1_RESTARTS + T2_RESTARTS ))
|
|
TOTAL_WARNINGS=$(( T1_WARNINGS + T2_WARNINGS ))
|
|
|
|
if [[ "$TOTAL_RESTARTS" -gt 0 || "$TOTAL_WARNINGS" -gt 0 ]]; then
|
|
CYCLE_END=$(date +%s)
|
|
echo ""
|
|
echo "━━━ $ICON_WATCHDOG Cycle $CYCLE — $(date '+%Y-%m-%d %H:%M:%S') ━━━"
|
|
echo "$ICON_WATCHDOG T1: $T1_RESTARTS restarts / $T1_WARNINGS warnings"
|
|
echo "$ICON_WATCHDOG T2: $T2_RESTARTS restarts / $T2_WARNINGS warnings"
|
|
echo "$ICON_TIME Duration: $(format_duration $(( CYCLE_END - CYCLE_START )))"
|
|
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
|
|
else
|
|
log "Cycle $CYCLE — all healthy ($(date '+%H:%M:%S'))"
|
|
# Heartbeat — periodic proof of life
|
|
if [[ "${DOCKER_WATCHDOG_HEARTBEAT:-true}" == true ]]; then
|
|
HB_SECONDS=$(( ${DOCKER_WATCHDOG_HEARTBEAT_HOURS:-1} * 3600 ))
|
|
UPTIME_SECONDS=$(( CYCLE * DOCKER_WATCHDOG_INTERVAL ))
|
|
if [[ "$HB_SECONDS" -gt 0 ]] && (( UPTIME_SECONDS % HB_SECONDS < DOCKER_WATCHDOG_INTERVAL )) && [[ "$UPTIME_SECONDS" -gt 0 ]]; then
|
|
HB_UPTIME_HR=$(( UPTIME_SECONDS / 3600 ))
|
|
info "♥ docker_watchdog alive — ~${HB_UPTIME_HR}hr uptime ($(date '+%H:%M:%S'))"
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
# Sleep until next cycle — interruptible by SIGTERM
|
|
sleep "$DOCKER_WATCHDOG_INTERVAL" &
|
|
wait $!
|
|
|
|
done |