attempt to implement workaround for sudomesh/bugs#24 . fyi @bennlich

create_exitnode.sh

@@ -144,6 +144,7 @@ EOF
 
 git clone https://github.com/${EXITNODE_REPO} /opt/exitnode
 cp -r /opt/exitnode/src/etc/* /etc/
+cp -r /opt/exitnode/src/opt/* /opt/
 mkdir -p /var/lib/babeld
 cp /opt/exitnode/l2tp_broker.cfg $TUNNELDIGGER_HOME/broker/l2tp_broker.cfg
 
@@ -157,15 +158,15 @@ sed -i.bak "s#interface=lo#interface=$ETH_IF#" $CFG
 sed -i 's/dns-nameservers.*/dns-nameservers 8.8.8.8/g' /etc/network/interfaces.d/50-cloud-init.cfg
 sed -i '/address/a \   \ dns-nameservers 8.8.8.8' /etc/network/interfaces.d/50-cloud-init.cfg 
 
-
-
 # start babeld and tunnel digger on reboot
 systemctl enable sudomesh-gateway
 systemctl enable tunneldigger
 systemctl enable babeld
+systemctl enable babeld-monitor
 
 service sudomesh-gateway start
 service tunneldigger start
 service babeld start
+service babeld-monitor start
 
 reboot now

src/etc/systemd/system/babeld-monitor.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=babeld-monitor
+After=network.target auditd.service
+
+[Timer]
+OnCalendar=*:0/10
+
+[Service]
+Type=simple
+ExecStart=/opt/babeld-monitor/babeld-monitor.sh 
+
+[Install]
+WantedBy=timers.target
+

src/opt/babeld-monitor/babeld-monitor.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+# This is a workaround for a suspected (babeld?) memory leak
+# https://github.com/sudomesh/bugs/issues/24
+
+set -e
+
+date_last_error=$(sudo journalctl -u babeld -o short-iso | grep "Cannot allocate memory" | tail -n1 | awk '{print $1}' | xargs date -d )
+
+date_last_started=$(sudo journalctl -u babeld -o short-iso | grep "Started babeld" | tail -n1 | awk '{print $1}' | xargs date -d )
+
+if [[$date_last_error > $date_last_restart]]; then
+  echo "found [Cannot allocate memory] error since last babeld restart"
+  echo "babeld restarting..."
+  service babeld restart
+  echo "babeld restarted."
+  # add tunnel interfaces to babeld
+  echo "add tunnel interfaces to babeld..."
+  ip addr | tr ' ' '\n' | grep -E "l2tp[0-9]+$" | sort | uniq | xargs -L 1 babeld -a 
+  echo "add tunnel interfaces to babeld done."
+else
+  echo "found no [Cannot allocate memory] error since last babeld restart"
+fi
+
+