gluetun-wireguard-multiple-configs

wireguardfile.sh

#!/bin/sh
set -eu

log() {
  echo "[wireguardfile] $*"
}

WGCONFIGS="/gluetun/wireguard" 
WGCONF="/gluetun/wireguard/wg0.conf" # gluetun needs a /gluetun/wireguard/wg0.conf path to work
STATEFILE="/gluetun/wireguard/.wg_index"

log "Starting sequential WireGuard config selection"

mkdir -p "$WGCONFIGS"

FILES=$(ls -1 "$WGCONFIGS"/wireguard-*.conf 2>/dev/null | sort || true)

if [ -z "$FILES" ]; then
  log "ERROR: No WireGuard configs found in $WGCONFIGS"
  exit 1
fi

COUNT=$(printf "%s\n" $FILES | wc -l | tr -d ' ')
log "Found $COUNT WireGuard configs"

if [ -f "$STATEFILE" ]; then
  LAST=$(cat "$STATEFILE" || echo 0)
else
  LAST=0
fi

NEXT=$((LAST + 1))
if [ "$NEXT" -gt "$COUNT" ]; then
  NEXT=1
fi

SELECTED=$(printf "%s\n" $FILES | sed -n "${NEXT}p")

log "Last index: $LAST"
log "Next index: $NEXT"
log "Selected config: $SELECTED"

echo "$NEXT" > "$STATEFILE"

rm -f "$WGCONF"
ln -sf "$SELECTED" "$WGCONF"

log "Symlink created:"
ls -l "$WGCONF"

log "Handing control to Gluetun entrypoint"
exec /gluetun-entrypoint