i/o fencing, 113
I/O operations
measuring, 294–295
in NFS, 296
I/P port entry, 383
ICMP (Internet Control Message Protocol)
with firewalls, 385
for iptables and ipchains, 43
ping packets in, 223, 385
tcpdump for, 377
identd script, 24
IEEE Task Force, 2
ifconfig command
for cluster configuration, 224
for IP aliases, 120
for NICs, 119, 380, 383
ifup command, 383
inactive connections in LVS scheduling, 203
@INC file, 266
informational log messages, 161
init scripts, 16–17
on cluster nodes, 21–31
as Heartbeat resource scripts, 128–129
for Mon, 318
for respawning services, 18
symbolic links for, 18–21
initdeadline entry, 135
initiate.stonith.event script, 324
inittab file, 16–17
INPUT rules
for ipchains, 39–40
in Netfilter, 35–37
insmod command, 177, 380
installing
CPAN modules, 265, 305–306
fping programming, 304
Ganglia, 330
Heartbeat, 132–134, 139–140, 263
kernels, 56
ldirectord, 266
LPRng, 347–348
LVS software, 220
Mon software, 306–307
NICs, 381–382
object code and configuration files, 60–62
rpm packages, 392–393
SNMP package, 304–305
System.map file, 61
SystemImager server software, 97–98
Integrated Services Digital Networks (ISDN), 24
interactive user applications in NFS, 292–293
Intermezzo filesystem, 396
Internet Control Message Protocol (ICMP)
with firewalls, 385
for iptables and ipchains, 43
ping packets in, 223, 385
tcpdump for, 377
IP address takeover (IPAT), 116
IP addresses
in Heartbeat, 116–125, 131
in linuxconf, 383
in LVS, 194–196
names for, 119–120
ownership of, 127–128
takeover of, 151–152
virtual, 194–195, 214–216, 241
IP aliases
creating and deleting, 120–121
failing over, 116
in haresources file, 148–149
in Heartbeat, 116–125
for source addresses, 117
IP-based virtual hosts, 400–401, 404
ip command
for packets, 50
for secondary IP addresses, 119–120
ip-request messages, 114
ip-request-resp messages, 114
ip route list command, 47
IP tunneling, 200–202
IP Virtual Server (IPVS) software, 193
ip_vs_timeout_table tables, 244
IPaddr script, 150
IPAT (IP address takeover), 116
ipchains and iptables
clearing existing rules for, 39
default policies in, 38
DNS for, 41
email for, 42–43
firewall rules for, 92–93
FTP for, 40–41
HTTP for, 43
ICMP for, 43
INPUT policy for, 39–40
marketing packets with, 252–253
in Netfilter, 35–37
for NICs, 385
routing scripts for, 47–50
SSH for, 42
tcpdump for, 376
telnet for, 42
ipchains script, 24
ipfail plug-in, 175–176
ipfwadm command, 222
ipip option, 270
iproute command, 120
iptables script, 24
iptakeover script, 152–153
IPVS (IP Virtual Server) software, 193
IPVS table, stateful failover of, 275–276
ipvsadm command
for cluster nodes, 352–353
for connection tracking, 243–244
for Director, 221–223, 228
for timeouts, 247–248
irda script, 24
ISDN (Integrated Services Digital Networks), 24
isdn script, 24