Gmer4LfeandClaude Sonnet 4.6
009820e981
Removes all references to "failover" and "HA" (high availability) terminology from variable names, config keys, state values, rsync profile names, directory paths, and user-visible strings. Mapping: FAILOVER_* → FALLBACK_* FAILOVER_HOST*_RUNS_FOR → FALLBACK_HOST*_COVERS critical-failover → critical-fallback emby-failover → emby-fallback appdata-Failover/ → appdata-Fallback/ "FAILOVER" state value → "FALLBACK" failover_start key → fallback_start Failover/ directory → Fallback/ failover.sh → fallback.sh failover_state.db → fallback_state.db -Failover folder suffix → -Fallback State machine: NORMAL | FALLBACK | DARK (unchanged) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
453 lines
20 KiB
Bash
453 lines
20 KiB
Bash
#!/bin/bash
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# ==============================================================================================
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# ================================= Failover Test ==============================================
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# ==============================================================================================
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# Controlled simulation of the failover lifecycle — validates the entire failover sequence
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# without waiting for a real outage.
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#
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# ── WHAT THIS SCRIPT IS ───────────────────────────────────────────────────────────────────────
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# A test harness only — contains no failover logic.
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# All failover logic lives in fallback.sh and is exercised by this test.
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# Any changes to fallback.sh are automatically reflected here.
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#
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# ── TEST SEQUENCE ─────────────────────────────────────────────────────────────────────────────
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# Phase 1 — Pre-flight verify both servers reachable, daemons healthy,
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# version parity, fallback.sh exists, state is NORMAL
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# Phase 2 — Block Remote iptables rule drops all traffic to remote IP
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# Phase 3 — Fallback Detection wait for fallback.sh to detect outage and enter FAILOVER
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# Phase 4 — Container Start verify Tier 1 failover containers started locally
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# Phase 5 — Restore remove iptables rule, remote becomes reachable
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# Phase 6 — Handback wait for fallback.sh to complete handback to NORMAL
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# Phase 7 — Container Handback verify Tier 1 containers stopped locally after handback
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# Phase 8 — Report full pass/fail summary per phase
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#
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# ── SAFEGUARDS ────────────────────────────────────────────────────────────────────────────────
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# FALLBACK_ENABLED gate — aborts if fallback monitoring is disabled
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# iptables safety trap — rule ALWAYS removed on exit (crash, error, ctrl-c, normal)
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# remote connectivity always restored regardless of outcome
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# Version parity check — pre-flight verifies both servers on compatible unRAID versions
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# Remote Docker daemon — pre-flight verifies remote daemon is responsive
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# DOCKER_TIMEOUT — all docker calls protected against daemon hangs
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# MY_ID-based routing — tier containers selected via MY_ID not hostname comparison
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# Command validation — iptables and notify validated before use
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# Dry-run safe — full sequence walkthrough without touching iptables or containers
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#
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# ── WARNING ───────────────────────────────────────────────────────────────────────────────────
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# ⚠️ This script starts and stops REAL containers on both servers.
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# Run during a maintenance window — users will experience a brief service interruption.
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# Use --dry-run to walk through the sequence without any real changes.
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#
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# ── CONFIGURATION (master.conf) ───────────────────────────────────────────────────────────────
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# FALLBACK_TEST_BLOCK_WAIT — seconds to wait for fallback.sh to detect outage
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# FALLBACK_TEST_HANDBACK_WAIT — seconds to wait for fallback.sh to complete handback
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# FALLBACK_CHECK_INTERVAL — check interval of the running fallback.sh (informational)
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# FALLBACK_HANDBACK_STRIKES — strikes required before handback (informational)
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# FALLBACK_STATE_FILE — state file path to read current state
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#
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# ── USAGE ─────────────────────────────────────────────────────────────────────────────────────
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# fallback_test.sh — run full test sequence
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# fallback_test.sh --dry-run — walk through all phases without changes
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# fallback_test.sh --status — show current fallback state and test config
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# fallback_test.sh --log — verbose output
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# ==============================================================================================
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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source "$SCRIPT_DIR/../load_config.sh"
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parse_args "$@"
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FALLBACK_SCRIPT="$SCRIPT_DIR/fallback.sh"
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DOCKER_TIMEOUT=15
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# ==============================================================================================
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# ── SAFETY TRAP — always remove iptables rule on exit ─────────────────────────────────────────
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# ==============================================================================================
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# Fires on normal exit, error exit, ctrl-c, and script crashes.
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# Remote connectivity is ALWAYS restored regardless of test outcome.
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IPTABLES_RULE_ACTIVE=false
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cleanup() {
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if [[ "$IPTABLES_RULE_ACTIVE" == true ]]; then
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echo ""
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warn "$ICON_SHIELD Cleanup — removing iptables block on $REMOTE_SERVER..."
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if [[ "$DRY_RUN" == false ]]; then
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iptables -D OUTPUT -d "$REMOTE_SERVER" -j DROP 2>/dev/null
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IPTABLES_RULE_ACTIVE=false
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warn "iptables rule removed — remote connectivity restored"
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else
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warn "DRY RUN — would remove iptables rule"
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fi
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fi
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}
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trap cleanup EXIT
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# ==============================================================================================
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# ━━━ Setup ━━━
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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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# FALLBACK_ENABLED gate — no point testing if failover is disabled
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if [[ "${FALLBACK_ENABLED:-false}" == false ]]; then
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warn "FALLBACK_ENABLED=false — fallback test aborted"
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warn "Enable fallback in master.conf before running this test"
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exit 0
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fi
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acquire_lock # strict single instance — modifies iptables and containers
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detect_hosts
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resolve_remote_ip
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# Validate commands used by this script
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validate_unraid_cmd \
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"$(which iptables 2>/dev/null || echo /sbin/iptables)" \
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"--version" "iptables" \
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"iptables" || { error "iptables not found — required for connectivity simulation"; exit 1; }
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validate_unraid_cmd \
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"/usr/local/emhttp/plugins/dynamix/scripts/notify" \
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"" "" \
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"unRAID notify script" || warn "unRAID notify script not found — native notifications disabled"
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if [[ ! -f "$FALLBACK_SCRIPT" ]]; then
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error "fallback.sh not found at $FALLBACK_SCRIPT"
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exit 1
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fi
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log "fallback.sh found at $FALLBACK_SCRIPT"
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[[ "$DRY_RUN" == true ]] && warn "DRY RUN — no iptables rules or container changes will be made"
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# ==============================================================================================
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# ━━━ Status ━━━
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# ==============================================================================================
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if [[ "$SHOW_STATUS" == true ]]; then
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local_ver=$(grep -oP '(?<=version=")[^"]+' /etc/unraid-version 2>/dev/null || echo "unknown")
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echo ""
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echo "━━━━━ $ICON_SUMMARY STATUS ━━━━━"
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echo "$ICON_HOST My ID: $MY_ID ($LOCAL_SERVER_NAME)"
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echo "$ICON_HOST Remote ID: $REMOTE_ID ($REMOTE_SERVER_NAME — $REMOTE_SERVER)"
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echo "$ICON_GEAR unRAID ver: $local_ver"
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echo "$ICON_FALLBACK Block wait: ${FALLBACK_TEST_BLOCK_WAIT}s"
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echo "$ICON_FALLBACK Handback wait: ${FALLBACK_TEST_HANDBACK_WAIT}s"
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echo "$ICON_FALLBACK Check interval: ${FALLBACK_CHECK_INTERVAL}s"
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echo "$ICON_FALLBACK Handback strikes: ${FALLBACK_HANDBACK_STRIKES}"
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echo "$ICON_GEAR Dry Run: $DRY_RUN"
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if [[ -f "$FALLBACK_STATE_FILE" ]]; then
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CURRENT_STATE=$(grep "^state=" "$FALLBACK_STATE_FILE" 2>/dev/null | cut -d= -f2)
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echo "$ICON_FALLBACK Current state: ${CURRENT_STATE:-unknown}"
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else
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echo "$ICON_FALLBACK Current state: no state file"
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fi
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# Show Tier 1 containers for this host
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TIER1_VAR="FALLBACK_${MY_ID}_COVERS_${REMOTE_ID}_TIER1"
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eval "TIER1_CONTAINERS=(\"\${${TIER1_VAR}[@]:-}\")"
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echo "$ICON_CONTAINERS Tier 1 to test: ${TIER1_CONTAINERS[*]:-none configured}"
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echo "━━━━━━━━━━━━━━━━━━━━━━━"
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exit 0
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fi
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# ==============================================================================================
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# ── PHASE TRACKING ────────────────────────────────────────────────────────────────────────────
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# ==============================================================================================
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PHASES_PASS=()
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PHASES_FAIL=()
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TOTAL_START=$(date +%s)
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phase_pass() { PHASES_PASS+=("$1"); warn "$ICON_DONE Phase: $1 — PASSED ✅"; }
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phase_fail() { PHASES_FAIL+=("$1"); error "Phase: $1 — FAILED ❌"; }
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# Get Tier 1 containers for this server's failover responsibility
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TIER1_VAR="FALLBACK_${MY_ID}_COVERS_${REMOTE_ID}_TIER1"
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eval "TIER1_CONTAINERS=(\"\${${TIER1_VAR}[@]:-}\")"
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# ==============================================================================================
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# ━━━ Phase 1 — Pre-flight ━━━
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# ==============================================================================================
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echo ""
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echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
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echo " $ICON_SHIELD FALLBACK TEST — $(date '+%Y-%m-%d %H:%M:%S')"
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echo " $ICON_HOST $MY_ID ($LOCAL_SERVER_NAME) → $REMOTE_ID ($REMOTE_SERVER_NAME)"
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echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
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echo ""
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echo "━━━ $ICON_SHIELD Phase 1 — Pre-flight ━━━"
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# Remote reachable
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if ping_remote; then
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log "$REMOTE_SERVER_NAME is reachable"
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else
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error "$REMOTE_SERVER_NAME is not reachable — cannot run test"
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phase_fail "Pre-flight"
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exit 1
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fi
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# Internet reachable
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if ping_internet; then
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log "Internet is reachable"
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else
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error "No internet connectivity — cannot run test"
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phase_fail "Pre-flight"
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exit 1
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fi
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# Version parity — test may produce misleading results on mismatch
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if ! check_unraid_version_parity; then
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error "unRAID version mismatch — test aborted to prevent misleading results"
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phase_fail "Pre-flight"
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exit 1
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fi
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# Remote Docker daemon — must be responsive before test manipulates containers
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if ! check_remote_docker_daemon; then
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error "Remote Docker daemon not responsive — cannot run test"
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phase_fail "Pre-flight"
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exit 1
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fi
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# Fallback state must be NORMAL before test
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if [[ -f "$FALLBACK_STATE_FILE" ]]; then
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CURRENT_STATE=$(grep "^state=" "$FALLBACK_STATE_FILE" 2>/dev/null | cut -d= -f2)
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if [[ "$CURRENT_STATE" != "NORMAL" ]]; then
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error "Fallback state is $CURRENT_STATE — must be NORMAL before running test"
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phase_fail "Pre-flight"
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exit 1
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fi
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log "Fallback state is NORMAL"
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else
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warn "No state file found — assuming NORMAL (first run)"
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fi
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# Tier 1 containers configured
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if [[ ${#TIER1_CONTAINERS[@]} -eq 0 ]]; then
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error "No Tier 1 containers configured for $MY_ID → $REMOTE_ID"
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error "Check FALLBACK_${MY_ID}_COVERS_${REMOTE_ID}_TIER1 in master_host*.conf"
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phase_fail "Pre-flight"
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exit 1
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fi
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log "Tier 1 containers: ${TIER1_CONTAINERS[*]}"
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phase_pass "Pre-flight"
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# ==============================================================================================
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# ━━━ Phase 2 — Block Remote Connectivity ━━━
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# ==============================================================================================
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echo ""
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echo "━━━ $ICON_PING Phase 2 — Block Remote Connectivity ━━━"
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warn "Adding iptables rule — dropping all traffic to $REMOTE_SERVER ($REMOTE_SERVER_NAME)"
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if [[ "$DRY_RUN" == false ]]; then
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iptables -I OUTPUT -d "$REMOTE_SERVER" -j DROP
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IPTABLES_RULE_ACTIVE=true
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# Verify block is working
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sleep 2
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if ! ping -c1 -W2 "$REMOTE_SERVER" &>/dev/null; then
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log "Connectivity block confirmed — ping to remote fails as expected"
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phase_pass "Block Remote"
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else
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error "iptables rule did not block connectivity — ping still succeeds"
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phase_fail "Block Remote"
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exit 1
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fi
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else
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warn "DRY RUN — would block $REMOTE_SERVER with iptables DROP rule"
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phase_pass "Block Remote"
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fi
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# ==============================================================================================
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# ━━━ Phase 3 — Fallback Detection ━━━
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# ==============================================================================================
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echo ""
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echo "━━━ $ICON_FALLBACK Phase 3 — Fallback Detection ━━━"
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warn "Waiting ${FALLBACK_TEST_BLOCK_WAIT}s for fallback.sh to detect outage..."
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log "fallback.sh check interval: ${FALLBACK_CHECK_INTERVAL}s"
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if [[ "$DRY_RUN" == false ]]; then
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sleep "$FALLBACK_TEST_BLOCK_WAIT"
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if [[ -f "$FALLBACK_STATE_FILE" ]]; then
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NEW_STATE=$(grep "^state=" "$FALLBACK_STATE_FILE" 2>/dev/null | cut -d= -f2)
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if [[ "$NEW_STATE" == "FALLBACK" ]]; then
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log "State changed to FALLBACK — outage detected correctly ✅"
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phase_pass "Fallback Detection"
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else
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error "State is $NEW_STATE — expected FALLBACK after ${FALLBACK_TEST_BLOCK_WAIT}s"
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warn "Is fallback.sh running? Check User Scripts plugin"
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phase_fail "Fallback Detection"
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fi
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else
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error "No state file found after wait — fallback.sh may not be running"
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phase_fail "Fallback Detection"
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fi
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else
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warn "DRY RUN — would wait ${FALLBACK_TEST_BLOCK_WAIT}s then check for FALLBACK state"
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phase_pass "Fallback Detection"
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fi
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# ==============================================================================================
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# ━━━ Phase 4 — Container Start Verification ━━━
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# ==============================================================================================
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echo ""
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echo "━━━ $ICON_CONTAINERS Phase 4 — Tier 1 Containers Started Locally ━━━"
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log "Checking Tier 1 containers: ${TIER1_CONTAINERS[*]}"
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if [[ "$DRY_RUN" == false ]]; then
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CONTAINERS_OK=true
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for container in "${TIER1_CONTAINERS[@]}"; do
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[[ -z "$container" ]] && continue
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STATUS=$(timeout "$DOCKER_TIMEOUT" docker inspect -f '{{.State.Running}}' \
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"$container" 2>/dev/null)
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if [[ "$STATUS" == "true" ]]; then
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log "$ICON_RUNNING $container is running locally ✅"
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else
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error "$ICON_NOT_RUNNING $container is NOT running locally"
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CONTAINERS_OK=false
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fi
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done
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if [[ "$CONTAINERS_OK" == true ]]; then
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phase_pass "Container Start"
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else
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phase_fail "Container Start"
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fi
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else
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warn "DRY RUN — would verify these Tier 1 containers started: ${TIER1_CONTAINERS[*]}"
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phase_pass "Container Start"
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fi
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# ==============================================================================================
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# ━━━ Phase 5 — Restore Remote Connectivity ━━━
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# ==============================================================================================
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echo ""
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echo "━━━ $ICON_PING Phase 5 — Restore Remote Connectivity ━━━"
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warn "Removing iptables block — $REMOTE_SERVER_NAME becomes reachable again"
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if [[ "$DRY_RUN" == false ]]; then
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iptables -D OUTPUT -d "$REMOTE_SERVER" -j DROP 2>/dev/null
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IPTABLES_RULE_ACTIVE=false
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sleep 3
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if ping_remote; then
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log "$REMOTE_SERVER_NAME is reachable again ✅"
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phase_pass "Restore Connectivity"
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else
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error "$REMOTE_SERVER_NAME still unreachable after removing iptables rule"
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phase_fail "Restore Connectivity"
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fi
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else
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warn "DRY RUN — would remove iptables rule"
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phase_pass "Restore Connectivity"
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fi
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# ==============================================================================================
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# ━━━ Phase 6 — Handback ━━━
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# ==============================================================================================
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echo ""
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echo "━━━ $ICON_FALLBACK Phase 6 — Handback ━━━"
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warn "Waiting ${FALLBACK_TEST_HANDBACK_WAIT}s for fallback.sh to complete handback..."
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log "Requires $FALLBACK_HANDBACK_STRIKES consecutive checks at ${FALLBACK_CHECK_INTERVAL}s"
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log "Minimum handback time: $(( FALLBACK_HANDBACK_STRIKES * FALLBACK_CHECK_INTERVAL ))s"
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if [[ "$DRY_RUN" == false ]]; then
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sleep "$FALLBACK_TEST_HANDBACK_WAIT"
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if [[ -f "$FALLBACK_STATE_FILE" ]]; then
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FINAL_STATE=$(grep "^state=" "$FALLBACK_STATE_FILE" 2>/dev/null | cut -d= -f2)
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if [[ "$FINAL_STATE" == "NORMAL" ]]; then
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log "State returned to NORMAL — handback completed ✅"
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phase_pass "Handback"
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else
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error "State is $FINAL_STATE — expected NORMAL after ${FALLBACK_TEST_HANDBACK_WAIT}s"
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warn "Handback may still be in progress — check fallback.sh output"
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phase_fail "Handback"
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fi
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else
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error "No state file found"
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phase_fail "Handback"
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fi
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else
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warn "DRY RUN — would wait ${FALLBACK_TEST_HANDBACK_WAIT}s then verify NORMAL state"
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phase_pass "Handback"
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fi
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# ==============================================================================================
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# ━━━ Phase 7 — Container Handback Verification ━━━
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# ==============================================================================================
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echo ""
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echo "━━━ $ICON_CONTAINERS Phase 7 — Tier 1 Containers Stopped Locally ━━━"
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log "Verifying Tier 1 containers returned to $REMOTE_SERVER_NAME"
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if [[ "$DRY_RUN" == false ]]; then
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HANDBACK_OK=true
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for container in "${TIER1_CONTAINERS[@]}"; do
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[[ -z "$container" ]] && continue
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STATUS=$(timeout "$DOCKER_TIMEOUT" docker inspect -f '{{.State.Running}}' \
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"$container" 2>/dev/null)
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if [[ "$STATUS" != "true" ]]; then
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log "$ICON_NOT_RUNNING $container stopped locally — handed back ✅"
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else
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error "$ICON_RUNNING $container still running locally — handback may have failed"
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HANDBACK_OK=false
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fi
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done
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if [[ "$HANDBACK_OK" == true ]]; then
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phase_pass "Container Handback"
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else
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phase_fail "Container Handback"
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fi
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else
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warn "DRY RUN — would verify Tier 1 containers stopped locally after handback"
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phase_pass "Container Handback"
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fi
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TOTAL_END=$(date +%s)
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# ==============================================================================================
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# ━━━ Test Report ━━━
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# ==============================================================================================
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echo ""
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echo "━━━━━ $ICON_SUMMARY FALLBACK TEST REPORT ━━━━━"
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echo "$ICON_HOST My ID: $MY_ID ($LOCAL_SERVER_NAME)"
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echo "$ICON_HOST Remote: $REMOTE_ID ($REMOTE_SERVER_NAME)"
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echo "$ICON_TIME Duration: $(format_duration $((TOTAL_END - TOTAL_START)))"
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echo ""
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echo " Phase Results:"
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for phase in "${PHASES_PASS[@]}"; do
|
|
echo " $ICON_SUCCESS $phase"
|
|
done
|
|
for phase in "${PHASES_FAIL[@]}"; do
|
|
echo " $ICON_ERROR $phase"
|
|
done
|
|
echo ""
|
|
|
|
PASS_COUNT=${#PHASES_PASS[@]}
|
|
FAIL_COUNT=${#PHASES_FAIL[@]}
|
|
TOTAL_PHASES=$(( PASS_COUNT + FAIL_COUNT ))
|
|
|
|
if [[ "$DRY_RUN" == true ]]; then
|
|
warn "DRY RUN — no changes made"
|
|
elif [[ "$FAIL_COUNT" -eq 0 ]]; then
|
|
warn "$ICON_DONE ALL $TOTAL_PHASES PHASES PASSED"
|
|
notify "Fallback test PASSED on $(hostname) — all $TOTAL_PHASES phases completed" \
|
|
"Fallback Test" "normal"
|
|
else
|
|
error "$FAIL_COUNT/$TOTAL_PHASES PHASES FAILED"
|
|
notify "Fallback test FAILED on $(hostname) — $FAIL_COUNT/$TOTAL_PHASES phases failed: ${PHASES_FAIL[*]}" \
|
|
"Fallback Test" "warning"
|
|
fi
|
|
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
|
|
|
|
[[ "$FAIL_COUNT" -gt 0 ]] && exit 1
|
|
exit 0 |