blob: 885506873a0b3c0cd3acec015e57a232a628a922 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
#!/bin/sh
# script to manage the lvs ip multiplexer for a single public address cluster
[ -n "$CTDB_BASE" ] || \
CTDB_BASE=$(d=$(dirname "$0") && cd -P "$d" && dirname "$PWD")
. "${CTDB_BASE}/functions"
load_script_options
[ -n "$CTDB_LVS_NODES" ] || exit 0
export CTDB_LVS_NODES
# type is commonly supported and more portable than which(1)
# shellcheck disable=SC2039
if ! type ipvsadm >/dev/null 2>&1 ; then
echo "LVS configured but ipvsadm not found"
exit 0
fi
lvs_follower_only ()
{
_ip_address=$(ctdb_get_ip_address)
awk -v my_ip="$_ip_address" \
'$1 == my_ip { if ($2 ~ "follower-only") { exit 0 } else { exit 1 } }' \
"$CTDB_LVS_NODES"
}
lvs_check_config ()
{
[ -r "$CTDB_LVS_NODES" ] || \
die "error: CTDB_LVS_NODES=${CTDB_LVS_NODES} unreadable"
[ -n "$CTDB_LVS_PUBLIC_IP" ] || \
die "Invalid configuration: CTDB_LVS_PUBLIC_IP not set"
if ! lvs_follower_only ; then
[ -n "$CTDB_LVS_PUBLIC_IFACE" ] || \
die "Invalid configuration: CTDB_LVS_PUBLIC_IFACE not set"
fi
}
case "$1" in
setup)
lvs_check_config
;;
startup)
lvs_check_config
ipvsadm -D -t "$CTDB_LVS_PUBLIC_IP" >/dev/null 2>&1
ipvsadm -D -u "$CTDB_LVS_PUBLIC_IP" >/dev/null 2>&1
ip addr add "${CTDB_LVS_PUBLIC_IP}/32" dev lo scope host
# do not respond to ARPs that are for ip addresses with scope 'host'
set_proc_maybe sys/net/ipv4/conf/all/arp_ignore 3
# do not send out arp requests from loopback addresses
set_proc_maybe sys/net/ipv4/conf/all/arp_announce 2
;;
shutdown)
lvs_check_config
ipvsadm -D -t "$CTDB_LVS_PUBLIC_IP"
ipvsadm -D -u "$CTDB_LVS_PUBLIC_IP"
ip addr del "${CTDB_LVS_PUBLIC_IP}/32" dev lo >/dev/null 2>&1
flush_route_cache
;;
ipreallocated)
lvs_check_config
# Kill connections
ipvsadm -D -t "$CTDB_LVS_PUBLIC_IP" >/dev/null 2>&1
ipvsadm -D -u "$CTDB_LVS_PUBLIC_IP" >/dev/null 2>&1
kill_tcp_connections_local_only \
"$CTDB_LVS_PUBLIC_IFACE" "$CTDB_LVS_PUBLIC_IP"
pnn=$(ctdb_get_pnn)
lvsleader=$("${CTDB_HELPER_BINDIR}/ctdb_lvs" leader)
if [ "$pnn" != "$lvsleader" ] ; then
# This node is not the LVS leader so change the IP address
# to have scope "host" so this node won't respond to ARPs
ip addr del "${CTDB_LVS_PUBLIC_IP}/32" dev lo >/dev/null 2>&1
ip addr add "${CTDB_LVS_PUBLIC_IP}/32" dev lo scope host
exit 0
fi
# Change the scope so this node starts responding to ARPs
ip addr del "${CTDB_LVS_PUBLIC_IP}/32" dev lo >/dev/null 2>&1
ip addr add "${CTDB_LVS_PUBLIC_IP}/32" dev lo >/dev/null 2>&1
ipvsadm -A -t "$CTDB_LVS_PUBLIC_IP" -p 1999999 -s lc
ipvsadm -A -u "$CTDB_LVS_PUBLIC_IP" -p 1999999 -s lc
# Add all nodes (except this node) as LVS servers
"${CTDB_HELPER_BINDIR}/ctdb_lvs" list |
awk -v pnn="$pnn" '$1 != pnn { print $2 }' |
while read ip ; do
ipvsadm -a -t "$CTDB_LVS_PUBLIC_IP" -r "$ip" -g
ipvsadm -a -u "$CTDB_LVS_PUBLIC_IP" -r "$ip" -g
done
# Add localhost too...
ipvsadm -a -t "$CTDB_LVS_PUBLIC_IP" -r 127.0.0.1
ipvsadm -a -u "$CTDB_LVS_PUBLIC_IP" -r 127.0.0.1
$CTDB gratarp \
"$CTDB_LVS_PUBLIC_IP" "$CTDB_LVS_PUBLIC_IFACE" >/dev/null 2>&1
flush_route_cache
;;
monitor)
lvs_check_config
if [ -n "$CTDB_LVS_PUBLIC_IFACE" ] ; then
interface_monitor "$CTDB_LVS_PUBLIC_IFACE" || exit 1
fi
;;
esac
exit 0
|
