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ctdb-scripts: Make 70.iscsi IPv6-aware

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Block iSCSI port for families of all address the node is configured to
host.

Could just unconditional add blocking using ip6tables instead.
However, this would produce errors when no IPv6 public addresses are
configured and ip6tables is not installed.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This commit is contained in:
Martin Schwenke 2014-12-30 17:01:21 +11:00 committed by Amitay Isaacs
parent 4ea40ed0c1
commit d1bd26e5eb
1 changed files with 29 additions and 5 deletions
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32
ctdb/config/events.d/70.iscsi
View File

@ -21,8 +21,27 @@ is_ctdb_managed_service || exit 0
case "$1" in
ipreallocated)
# block the iscsi port
iptables -I INPUT 1 -p tcp --dport 3260 -j DROP
all_ips=$(ctdb -X ip | tail -n +2)
# Block the iSCSI port. Only block for the address families
# we have configured. This copes with, for example, ip6tables
# being unavailable on an IPv4-only system.
have_ipv4=false
have_ipv6=false
while IFS='|' read x ip pnn x ; do
case "$ip" in
*:*) have_ipv6=true ;;
*) have_ipv4=true ;;
esac
done <<EOF
$all_ips
EOF
if $have_ipv4 ; then
iptables -I INPUT 1 -p tcp --dport 3260 -j DROP
fi
if $have_ipv6 ; then
ip6tables -I INPUT 1 -p tcp --dport 3260 -j DROP
fi
# shut down the iscsi service
killall -9 tgtd >/dev/null 2>/dev/null
@ -36,7 +55,8 @@ case "$1" in
# start the iscsi daemon
tgtd >/dev/null 2>/dev/null
ips=$(ctdb -X ip | awk -F'|' -v pnn=$this_node '$3 == pnn {print $2}')
# Run a script for each currently hosted public IP address
ips=$(echo "$all_ips" | awk -F'|' -v pnn=$this_node '$3 == pnn {print $2}')
for ip in $ips ; do
script="${CTDB_START_ISCSI_SCRIPTS}/${ip}.sh"
if [ -x "$script" ] ; then
@ -45,10 +65,14 @@ case "$1" in
fi
done
# remove all iptables rules
# Unblock iSCSI port. These can be unconditional (compared to
# blocking above), since errors are redirected.
while iptables -D INPUT -p tcp --dport 3260 -j DROP >/dev/null 2>&1 ; do
:
done
while ip6tables -D INPUT -p tcp --dport 3260 -j DROP >/dev/null 2>&1 ; do
:
done
;;