viwib2: wait up to 30 seconds trying to reach the viwib

openwrt/viwib-2-configure.sh

@@ -36,11 +36,12 @@ public_key=$(echo $private_key | wg pubkey)
 vpn_endpoint_host=vpn-2a0ae5c1600.ungleich.ch
 vpn_endpoint_pubkey=ygZQW3OSiMJl/RpKyaJVE0GSt6bjEDnoxdMJsNiloRE=
 
-ping -c3 ${viwib_ip}
-if [ $? -ne 0 ]; then
-    echo "Cannot reach ${viwib_ip}, aborting"
-    exit 1
-fi
+i=0
+while [ $i -lt 30 ]; do
+    echo "Trying to reach ${viwib_ip} ($i)"
+    ping -c1 ${viwib_ip} >/dev/null && break
+    i=$((i+1))
+done
 
 
 cat <<EOF | ssh -t "root@${viwib_ip}"