Products/HA/DellRedHatHALinuxCluster/Storage/EqualLogic PS-Series/Appendix
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Dell|Red Hat HA Linux > Storage > EqualLogic PS-Series > Appendix
Contents |
Appendix
Verfication Checklist
| Item | Verified |
|---|---|
| Physical setup and cabling | |
| Storage array initialized | |
| iSCSI NICs configured on each node | |
| iSCSI initiator tools installed on each node | |
| iSCSI Initiator IQN set on each node to ease identification | |
| Management node configured | |
| Set member RAID policy | |
| Create a Volume for the Cluster | |
| Configure Access Control List | |
| Set Access Type to "shared" | |
| Multipath I/O configured on each node | |
| Perform iSCSI discovery and initiate sessions on all paths | |
| Create logical volume with GFS and mount |
CHAP Configuration
Values to set for initiator and target authentication:
node.session.auth.authmethod = CHAP node.session.auth.username = nodes node.session.auth.password = nodespassword node.session.auth.username_in = target node.session.auth.password_in = targetpassword discovery.sendtargets.auth.authmethod = CHAP discovery.sendtargets.auth.username = nodes discovery.sendtargets.auth.password = nodespassword discovery.sendtargets.auth.username_in = target discovery.sendtargets.auth.password_in = targetpassword
Script to Automate iSCSI Setup
Call this script on each cluster node, giving the iSCSI target ip address as it's first argument. This script makes assumptions that the cluster node iSCSI networks are on a Class C (/24) network. Pass either A or B to change that behavior.
#!/bin/bash
# Script to setup multipath iscsi ifaces to discover targets on
# Pass the first argument to the script an ip address of the iSCSI target
# Example: ./$0 192.168.100.1
# Optionally pass a second argument of [A|B|C] to set the class of network
# Example: ./$0 192.168.100.1 B # will only match the first 2 octets when determining which nics to create interfaces for
TARGET=$1
if [ "$TARGET" = "" ]
then
echo "Usage: $0 iscsi_target_ip [A|B|C]"
echo
echo "A|B|C is is class of network A=/8 B=/16 C=/24(default)"
exit 1
fi
echo "-Checking for iscsi-initiator-utils"
rpm -q iscsi-initiator-utils
if [ ! "$?" = "0" ]
then
echo "-Installing iscsi-initiator-utils for you"
yum -y install iscsi-initiator-utils
rpm -q iscsi-initiator-utils
if [ ! "$?" = "0" ]
then
echo "Error $?: Cannot find iscsi-initiator-utils"
exit 1
fi
fi
echo "-Checking for iscsi running"
service iscsi status
if [ ! "$?" = "0" ]
then
echo "-Staring iscsi for you"
service iscsi start
fi
# This is where the type of network is set. Default of Class C
# Class C, matches 1.2.3 and the last octet doesn't matter
SUBNET=$2
if [ ! "$SUBNET" = "" ]
then
case "$SUBNET" in
A|a)
echo Using Class A network, matching first octet ...
# Class A, matches first octet only and the rest are wildcard.
NETWORK=$(echo $1 | awk -F"." '{print $1}')
;;
B|b)
echo Using Class B network, matching first two octets ...
# Class B, matches 1.2 and the last two octets do not matter
NETWORK=$(echo $1 | awk -F"." '{print $1"."$2}')
;;
*)
echo Using Class C network, matching first 3 octets ...
# Class C, matches 1.2.3 and the last octet doesn't matter
NETWORK=$(echo $1 | awk -F"." '{print $1"."$2"."$3}')
;;
esac
else
echo Assuming Class C network, matching first 3 octets ...
# Class C, matches 1.2.3 and the last octet doesn't matter
NETWORK=$(echo $1 | awk -F"." '{print $1"."$2"."$3}')
fi
echo "-Configuring iSCSI interfaces on $NETWORK network:"
NUM_IFACES=0
echo "running for nic in $(ip a | grep $NETWORK | awk '{print $7}')"
for nic in $(ip a | grep $NETWORK | awk '{print $7}')
do
echo "-found $nic on $NETWORK"
echo "-Creating iscsi iface i${nic}"
iscsiadm -m iface -I i${nic} --op=new
if [ ! "$?" = "0" ]
then
echo "$?: Error creating iface i${nic}"
exit 1
fi
echo "-Associating ${nic} with iscsi iface i${nic}"
iscsiadm -m iface -I i${nic} --op=update -n iface.net_ifacename -v $nic
echo "Checking grep -q -s 'iface.net_ifacename = $nic' /var/lib/iscsi/ifaces/i$nic"
grep -q -s "iface.net_ifacename = $nic" /var/lib/iscsi/ifaces/i$nic
if [ ! "$?" = "0" ]
then
echo "$?: Error updating iface i${nic}"
exit 1
fi
ALL_IFACES="$ALL_IFACES -I i${nic}"
NUM_IFACES=$(( $NUM_IFACES + 1 ))
done
echo "Interfaces configured: $ALL_IFACES"
echo "Found $NUM_IFACES nics on $NETWORK"
if [ "$ALL_IFACES" = "" ]
then
echo "Could not find any interfaces!"
exit 1
fi
if [ "$NUM_IFACES" -lt "2" ]
then
echo "Could not find at least two interfaces!"
exit 1
fi
echo "-Discoverying available targets on $TARGET"
iscsiadm -m discovery -t sendtargets -p $TARGET $ALL_IFACES
if [ ! "$?" = "0" ]
then
echo "$?: Error receiving target $TARGET"
exit 1
fi
echo "-Logging in to all targets"
iscsiadm -m node --loginall=all
if [ ! "$?" = "0" ]
then
echo $?: Error loggin in to target $TARGET
exit 1
fi
echo "-Active sessions:"
iscsiadm -m node session
Continue to the Cluster documentation
Dell|Red Hat HA Linux > Storage > EqualLogic PS-Series > Appendix
