DHCP server

Setting DHCP server on clon10new (RHEL7)

yum install dhcp tftp tftp-server

mkdir /tftpboot

grub2-mknetdir --net-directory=/tftpboot/efi

Create file /etc/systemd/system/tftp.service:

[Unit]
Description=Tftp Server
Requires=tftp.socket
Documentation=man:in.tftpd

[Service]
#ExecStart=/usr/sbin/in.tftpd -s /var/lib/tftpboot
ExecStart=/usr/sbin/in.tftpd -s /tftpboot
StandardInput=socket

[Install]
Also=tftp.socket

Start tftp:

systemd start tftp

Create file /tftpboot/efi/boot/grub2/grub.cfg with following contents:

function load_video {
insmod efi_gop
insmod efi_uga
insmod video_bochs
insmod video_cirrus
insmod all_video
}

load_video
set gfxpayload=keep
insmod gzio
set timeout=2
menuentry 'Diskless CentOS7 x86_64, any network device'  --class redhat --class gnu-linux --class gnu --class os {
linuxefi linux-install/CentOS7-x86_64-Diskless/vmlinuz-3.10.0-1062.9.1.el7.x86_64 zram=1 ip=::::::dhcp root=nfs:129.57.29.103:/daqfs/diskless/CentOS7-devel/x86_64/root-jvme ro vga=0x305 module_blacklist=ipmi_si,ipmi_msghandler,ipmi_devintf,w83977f_wdt
initrdefi linux-install/CentOS7-x86_64-Diskless/initramfs-jvme-3.10.0-1062.9.1.el7.x86_64.img
}

Start dhcp:

systemctl start dhcpd

Install nfs:

yum install nfs-utils

Configure file /etc/exports:

/diskless 192.168.10.0/24(rw,sync)

Start NFS server:

systemctl status nfs-server

Check that NFS is exporting. Command

showmount -e

have to show following:

Export list for clondaq15.jlab.org:
/diskless 192.168.10.0/24