Hi,
Is it possible to add bonding support in Dracut? We currently have 2
bonding options in our current stateless environment (using busybox
initrd), but looking to move to Dracut when using RH6/Fedora13 going
forward..
Currently, we do the following in our init script:
We currently are using NETWORK= passed on cmdline:
# NETSTR formats:
# NETWORK=bridge
# NETWORK=lacp:second-nic-mac
# NETWORK=bond:second-nic-mac
Here is a snip from our init script:
...
...
# add virtio
insmod /lib/virtio_ring.ko
insmod /lib/virtio.ko
insmod /lib/virtio_pci.ko
NETDRIVERS=`/sbin/kudzu -q -p -c NETWORK | awk '/driver/ {print $2}' |
uniq`
for DRIVER in ${NETDRIVERS}
do
# Loading the igb driver kills the IMM
if [ ${DRIVER} != 'igb' ]
then
echo loading /lib/${DRIVER}.ko
insmod /lib/${DRIVER}.ko
if [ ${DRIVER} = 'mlx4_core' ]
then
insmod /lib/mlx4_en.ko
fi
fi
done
# BOOTIF is passed on cmdline
# requires IPAPPEND 2 in pxelinux.cfg/default file BOOTIF=`echo
${BOOTIF} |sed 's/^01-//' |sed 's/\-/:/g'` echo ipappend bootif is
${BOOTIF}
# Get the NETWORK string from the cmdline # Also BOOTIF if not defined
for STR in `cat /proc/cmdline` do
KEY=`echo $STR |awk -F= '{print $1}' | sed 's/^01-//' | sed
's/\-/:/g'`
if [ ${KEY} = "NETWORK" ]
then
NETSTR=`echo $STR |awk -F= '{print $2}'`
echo cmdline network is ${NETSTR}
fi
if [ -z "${BOOTIF}" ]
then
if [ ${KEY} = "BOOTIF" ]
then
BOOTIF=`echo $STR |awk -F= '{print $2}'`
echo cmdline bootif is ${BOOTIF}
fi
fi
done
# Match the BOOTIF address to a ethX device if [ ! -z "${BOOTIF}" ] then
for ETH in `(cd /sys/class/net; ls -d eth*)`
do
if grep -i $BOOTIF /sys/class/net/${ETH}/address > /dev/null
then
export NIC1=${ETH}
echo NIC1 is ${NIC1}
break
fi
done
fi
# If not found default to eth0
if [ -z "${NIC1}" ]
then
export NIC1="eth0"
fi
# NETSTR formats:
# NETWORK=bridge
# NETWORK=lacp:second-nic-mac
# NETWORK=bond:second-nic-mac
if echo ${NETSTR} | grep bridge > /dev/null 2>&1 then
BRIDGE=1
else
BRIDGE=0
fi
if echo ${NETSTR} | grep lacp > /dev/null 2>&1 then
LACP=1
BOOTIF2=`echo ${NETSTR} |awk -F: '{print $2}' | sed 's/^01-//' |
sed 's/\-/:/g'` else
LACP=0
fi
if echo ${NETSTR} | grep bond > /dev/null 2>&1 then
BOND=1
BOOTIF2=`echo ${NETSTR} |awk -F: '{print $2}' | sed 's/^01-//' |
sed 's/\-/:/g'` else
BOND=0
fi
# BOOTIF2 is the mac address of the second link in a bond if [ ! -z
"${BOOTIF2}" ] then
# Match the BOOTIF2 address to a ethX device
for ETH in `(cd /sys/class/net; ls -d eth*)`
do
if grep -i ${BOOTIF2} /sys/class/net/${ETH}/address > /dev/null
then
export NIC2=${ETH}
echo NIC2 is ${NIC2}
break
fi
done
else
# Guess the NIC to use, ${NIC1} plus 1
NUMBER=`echo ${NIC1} | sed s/eth//`
NEXTNUMBER=`expr ${NUMBER} + 1`
NIC2="eth"${NEXTNUMBER}
fi
if [ ${BRIDGE} -eq 1 ]
then
echo Creating a KVM bridge
insmod /lib/bridge.ko
brctl addbr bridge1
brctl addif bridge1 ${NIC1}
ip link set bridge1 up
ip link set ${NIC1} up
export NIC1=bridge1
fi
if [ ${BOND} -eq 1 ]
then
# A ALB bond
insmod /lib/crypto_api.ko
insmod /lib/xfrm_nalgo.ko
insmod /lib/ipv6.ko
insmod /lib/bonding.ko miimon=100 mode=balance-alb downdelay=1000
updelay=5000
elif [ ${LACP} -eq 1 ]
then
# A LACP bond
insmod /lib/crypto_api.ko
insmod /lib/xfrm_nalgo.ko
insmod /lib/ipv6.ko
insmod /lib/bonding.ko miimon=100 mode=802.3ad lacp_rate=1
fi
if [ ${BOND} -eq 1 -o ${LACP} -eq 1 ]
then
# Set the bond link up
ip link set bond0 up
# Set eth0 bond so it can be added to the bond
ip link set ${NIC1} down
# Add the interfaces to the bond
echo +${NIC1} > /sys/class/net/bond0/bonding/slaves
echo +${NIC2} > /sys/class/net/bond0/bonding/slaves
export NIC1=bond0
# Wait for a while for the bond to sort itself out
sleep 5
fi
# DEBUG
sleep 30
# Now let netstart get a DHCP address on the interface (${NIC1}) COUNT=0
MAX_COUNT=3
while [ ${COUNT} -le ${MAX_COUNT} ]
do
echo "Running netstart for $NIC1"
export ETHERNET=${NIC1}
netstart
if ! ifconfig | grep inet > /dev/null
then
echo -e "${RED}Failed to acquire address, retrying ${RESET}"
sleep 1
COUNT=`expr ${COUNT} + 1`
else
# We have an address so exit
break
fi
done
if ! ifconfig | grep inet > /dev/null
then
echo -e "${RED}Failed to acquire address ${RESET}"
echo -e "${RED}sleeping for a very long time${RESET}"
sleep 99d
fi
...
...
Thanks.
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