From d7f0cbdc102a1186cec80d0ebf29b8f4ef415435 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Sat, 15 May 2021 11:55:03 +0200
Subject: conntrack: T3535: add keepalived notifications for node transitions

---
 src/helpers/vyos-vrrp-conntracksync.sh | 154 +++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100755 src/helpers/vyos-vrrp-conntracksync.sh

(limited to 'src/helpers')

diff --git a/src/helpers/vyos-vrrp-conntracksync.sh b/src/helpers/vyos-vrrp-conntracksync.sh
new file mode 100755
index 000000000..4501aa63e
--- /dev/null
+++ b/src/helpers/vyos-vrrp-conntracksync.sh
@@ -0,0 +1,154 @@
+#!/bin/sh
+#
+# (C) 2008 by Pablo Neira Ayuso <pablo@netfilter.org>
+#
+# This software may be used and distributed according to the terms
+# of the GNU General Public License, incorporated herein by reference.
+#
+# Description:
+#
+# This is the script for primary-backup setups for keepalived
+# (http://www.keepalived.org). You may adapt it to make it work with other
+# high-availability managers.
+#
+# Modified by : Mohit Mehta <mohit@vyatta.com>
+# Slight modifications were made to this script for running with Vyatta
+# The original script came from 0.9.14 debian conntrack-tools package
+#
+#
+
+CONNTRACKD_BIN=/usr/sbin/conntrackd
+CONNTRACKD_LOCK=/var/lock/conntrack.lock
+CONNTRACKD_CONFIG=/etc/conntrackd/conntrackd.conf
+FACILITY=daemon
+LEVEL=notice
+TAG=conntrack-tools
+LOGCMD="logger -t $TAG -p $FACILITY.$LEVEL"
+VRRP_GRP="VRRP sync-group [$2]"
+FAILOVER_STATE="/var/run/vyatta-conntrackd-failover-state"
+
+$LOGCMD "vyatta-vrrp-conntracksync invoked at `date`"
+
+
+if [ ! -e $FAILOVER_STATE ]; then
+	mkdir -p /var/run
+	touch $FAILOVER_STATE
+fi
+
+case "$1" in
+  master)
+  	echo MASTER at `date` > $FAILOVER_STATE
+    $LOGCMD "`uname -n` transitioning to MASTER state for $VRRP_GRP"
+    #
+    # commit the external cache into the kernel table
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -c
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -c"
+    fi
+
+    #
+    # commit the expect entries to the kernel
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -c exp
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -ce exp"
+    fi
+
+    #
+    # flush the internal and the external caches
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -f
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -f"
+    fi
+
+    #
+    # resynchronize my internal cache to the kernel table
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -R
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -R"
+    fi
+
+    #
+    # send a bulk update to backups
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -B
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -B"
+    fi
+    ;;
+  backup)
+  	echo BACKUP at `date` > $FAILOVER_STATE
+    $LOGCMD "`uname -n` transitioning to BACKUP state for $VRRP_GRP"
+    #
+    # is conntrackd running? request some statistics to check it
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -s
+    if [ $? -eq 1 ]
+    then
+        #
+        # something's wrong, do we have a lock file?
+        #
+        if [ -f $CONNTRACKD_LOCK ]
+        then
+            $LOGCMD "WARNING: conntrackd was not cleanly stopped."
+            $LOGCMD "If you suspect that it has crashed:"
+            $LOGCMD "1) Enable coredumps"
+            $LOGCMD "2) Try to reproduce the problem"
+            $LOGCMD "3) Post the coredump to netfilter-devel@vger.kernel.org"
+            rm -f $CONNTRACKD_LOCK
+        fi
+        $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -d
+        if [ $? -eq 1 ]
+        then
+            $LOGCMD "ERROR: cannot launch conntrackd"
+            exit 1
+        fi
+    fi
+    #
+    # shorten kernel conntrack timers to remove the zombie entries.
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -t
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -t"
+    fi
+
+    #
+    # request resynchronization with master firewall replica (if any)
+    # Note: this does nothing in the alarm approach.
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -n
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -n"
+    fi
+    ;;
+  fault)
+  	echo FAULT at `date` > $FAILOVER_STATE
+    $LOGCMD "`uname -n` transitioning to FAULT state for $VRRP_GRP"
+    #
+    # shorten kernel conntrack timers to remove the zombie entries.
+    #
+    $CONNTRACKD_BIN -C $CONNTRACKD_CONFIG -t
+    if [ $? -eq 1 ]
+    then
+        $LOGCMD "ERROR: failed to invoke conntrackd -t"
+    fi
+    ;;
+  *)
+  	echo UNKNOWN at `date` > $FAILOVER_STATE
+    $LOGCMD "ERROR: `uname -n` unknown state transition for $VRRP_GRP"
+    echo "Usage: vyatta-vrrp-conntracksync.sh {master|backup|fault}"
+    exit 1
+    ;;
+esac
+
+exit 0
-- 
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