systemd service to enable sriov

#! /bin/bash

cat > /usr/bin/sriov.sh <<EOF
HOSTNAME="$(hostname -f)"
PEN_CARDS=`/sbin/lspci -Dnn|grep -i pensando|grep -v Virtual|awk '{print $1}'`
## Enable SRIOV Profile, 16 for each card
for l in $PEN_CARDS
do
    SRV=`find /sys -name sriov_numvfs|grep $l`
    if [ -z "$SRV" ]
    then
        continue
    fi
    # Enable sriov profile
    echo 16 >$SRV

    # Generate a unique prefix based on hostname and the pci id of the Card
    MAC_ADDR_PREFIX=$(echo ${HOSTNAME}-$l|md5sum|sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4/')

    # Find all interfaces with all zeros mac address and assign them based on the prefix above
    index=0
    for i in $(ip -o link show | awk -F': ' '{print $2}')
    do
        if [ "$i" != "lo" ]
        then
            mac=$(cat /sys/class/net/$i/address)
            if [[ $mac == *"00:00:00:00:00:00"* ]]
            then
                x=$(printf "%02X\n" $index)
                echo "setting mac addr for device $i $MAC_ADDR_PREFIX:$x"
                index=$((index + 1))
                ip link set "$i" address "$MAC_ADDR_PREFIX:$x"
            fi
        fi
    done
done
EOF

chmod +x /usr/bin/sriov.sh

cat > /etc/systemd/system/pen-sriov.service <<EOF
[Unit]
Description=Oneshot service to enable sriov profile and configure mac addresses for VFs

[Service]
Type=oneshot
ExecStart=//usr/bin/sriov.sh
RemainAfterExit=yes
TimeoutSec=0

# Output needs to appear in instance console output
StandardOutput=journal+console
StandardError=journal+console

[Install]
WantedBy=multi-user.target
EOF


systemctl daemon-reload
systemctl enable pen-sriov 
systemctl start pen-sriov