I

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