Setting Up a PXE Boot Server on SUSE Linux Enterprise Server for SAP applications 16.0

> sudo zypper install grub2 nginx

> sudo zypper install shim

> sudo zypper install radvd

> sudo zypper install rsync

> sudo grub2-mknetdir --net-directory=/srv/tftpboot
--subdir=/boot/grub2

> sudo zypper in tftpboot-agama-installer-SUSE_SLE_16-ARCH

> sudo mkdir -p
/srv/tftpboot/boot/images/SLES-16.0/ARCH

> sudo cd
/srv/tftpboot/boot/images/SLES-16.0/ARCH

> sudo cp -v /usr/share/tftpboot-installation/agama-installer-SUSE_SLE_16/ARCH/loader/linux .

> sudo cp -v /usr/share/tftpboot-installation/agama-installer-SUSE_SLE_16/ARCH/loader/initrd .

> sudo cp -v /usr/share/tftpboot-installation/agama-installer-SUSE_SLE_16/ARCH/loader/squashfs.img .

> ls -la /srv/tftpboot/boot/images/SLES-16.0/ARCH/*

> sudo find /srv/tftpboot/boot/images/ -type d -exec chmod 0755 {} \;

> sudo find /srv/tftpboot/boot/images/ -type f -exec chmod 0644 {} \;

> sudo mkdir -p /srv/tftpboot/boot/config

> sudo mkdir -p /srv/tftpboot/boot/config/aa:bb:cc:dd:ee:ff

> sudo cat > /srv/tftpboot/boot/config/aa:bb:cc:dd:ee:ff/grub.cfg << 'EOF'
# Machine-specific configuration for aa:bb:cc:dd:ee:ff
set default='SLES-16.0 Full Installation'

# Activate the menu-entry after 5sec timeout
set timeout=5

# Use know predictable network interface name
set ipcfg="ip=eno1:dhcp"

# Set the autoinstall variable for this machine
set autoinstall="inst.auto=http://pxe.example.net/install/profiles/aa:bb:cc:dd:ee:ff/sles16.json"
export autoinstall

# Load the default menu
source "/boot/grub2/menu.cfg"
EOF

> sudo cat > /srv/tftpboot/boot/config/aa:bb:cc:dd:ee:ff/grub.cfg << 'EOF'
set default='SLES-16.0 Auto-Installation'
set timeout=5

menuentry 'SLES-16.0 Auto-Installation' {
  linux  /boot/images/SLES-16.0/${arch}/linux showopts root=live:http://pxe.example.net/boot/images/SLES-16.0/${arch}/squashfs.img inst.install_url=http://pxe.example.net/install/SLES-16.0/${arch} inst.auto=http://pxe.example.net/install/profiles/${net_default_mac}/sles16.json ip=eno1:dhcp
  initrd /boot/images/SLES-16.0/${arch}/initrd
}
EOF

> find /srv/tftpboot/boot/grub2 -type f -name "*.cfg" -o -name "*.efi" -o -name "core.*"

> grub2-script-check /srv/tftpboot/boot/grub2/grub.cfg

> grub2-script-check /srv/tftpboot/boot/grub2/menu.cfg

> sudo chmod -R 644 /srv/tftpboot/boot/grub2/*.cfg

> sudo find /srv/tftpboot/boot/grub2 -type d -exec chmod 0755 {} \;

> sudo sed -i 's/^TFTP_OPTIONS=.*/TFTP_OPTIONS="-v"/' /etc/sysconfig/tftp

> sudo systemctl enable --now tftp.service

> sudo cat > /etc/dnsmasq.d/tftp.conf << 'EOF'
enable-tftp
tftp-root=/srv/tftpboot
EOF

> sudo systemctl enable --now dnsmasq

> echo "test file" | sudo tee /srv/tftpboot/test.txt

> tftp localhost -c get test.txt /tmp/tftp-test.txt

> cat /tmp/tftp-test.txt

> sudo rm /srv/tftpboot/test.txt /tmp/tftp-test.txt

> sudo vim /etc/nginx/nginx.conf

> sudo cat > /etc/nginx/nginx.conf << 'EOF'
http {

    include             mime.types;
    default_type        application/octet-stream;

    charset             utf-8;
    sendfile            on;
    keepalive_timeout   65;

    server {
        listen          80  default_server;
        listen     [::]:80  default_server;

        location / {
            root   /srv/www/htdocs/;
            index  index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /srv/www/htdocs/;
        }

        # Expose TFTP boot directory for HTTP boot
        location /boot {
            alias      /srv/tftpboot/boot;
            autoindex  on;
        }

        # Expose installation repositories and profiles
        location /install {
            alias      /srv/install;
            autoindex  on;
        }
    }
}

events {
    worker_connections  1024;
}
EOF

> sudo nginx -t

> sudo systemctl enable --now nginx.service

> curl -I http://localhost/boot/

> curl -I http://localhost/install/

> curl -I http://localhost/boot/images/SLES-16.0/x86_64/liveiso/LiveOS/squashfs.img

> sudo cat > /etc/dnsmasq.d/dns.conf << 'EOF'
# DNS configuration file for dnsmasq

# Log DNS queries
log-queries

# DNS cache behavior
cache-size=10000
local-ttl=60
neg-ttl=10

# Never forward A or AAAA queries for plain names to upstream name servers
domain-needed

# Add local domain to simple names in /etc/hosts and DHCP
expand-hosts

# Specifies DNS domain and networks including local forward and reverse declarations
domain=EXAMPLE.NET,192.168.1.0/24,local
domain=EXAMPLE.NET,2001:db8:0:1::/64,local
EOF

> sudo cat >> /etc/hosts << 'EOF'
192.168.1.200 PXE.EXAMPLE.NET
2001:db8:0:1::200 PXE.EXAMPLE.NET
EOF

> sudo dnsmasq --test

> sudo systemctl enable --now dnsmasq

> nslookup PXE.EXAMPLE.NET localhost

> nslookup PXE.EXAMPLE.NET localhost | grep 2001:db8

> nslookup 192.168.1.200 localhost

> nslookup google.com localhost

> systemctl status chronyd.service

> chronyc tracking

> chronyc sources

> chronyc sourcestats

> sudo cat > /etc/radvd.conf << 'EOF'
interface eno1
{
    # radvd options
    IgnoreIfMissing on;                 # Do not fail and exit when interface is missed
    AdvSendAdvert on;                   # Sending RAs on the interface is not disabled

    # Configuration settings

    AdvManagedFlag on;                  # Request IPv6 address and dns options via DHCPv6
    AdvOtherConfigFlag off;             # Request only dns info via DHCPv6, IP via SLAAC

    AdvDefaultLifetime 1800;            # Add default route via this router for 1800sec

    prefix 2001:db8:0:1::/64            # Add direct route for this local network/prefix
    {
        AdvAutonomous           off;    # Assign IPv6 address via SLAAC
        AdvValidLifetime        7200;
        AdvPreferredLifetime    3600;
    };
};
EOF

> sudo systemctl enable --now radvd

> systemctl status radvd

> radvdump

> sudo cat > /etc/sysctl.d/90-network.conf << 'EOF'
# This machine is a router
net.ipv4.conf.all.forwarding = 1
net.ipv6.conf.all.forwarding = 1

# Accept host autoconf on router uplink
net.ipv6.conf.uplink.accept_ra = 2
EOF

> sudo sysctl -p /etc/sysctl.d/90-network.conf

> sudo cat > /etc/dnsmasq.d/dhcp.conf << 'EOF'
# DHCP configuration file for dnsmasq

# Log DHCP processing
log-dhcp

# This is the only DHCP server, don't ignore unknown clients/send NAK
dhcp-authoritative

# Disable re-use of the DHCPv4 servername and filename fields as extra
# option space, which may confuse old or broken clients
dhcp-no-override

# IPv4 PXE/HTTP boot client matches (no enterprise number)
# Match client type in PXEClient:Arch and map to a tag
dhcp-vendorclass=set:tftp_bios_x86_pc,PXEClient:Arch:00000
dhcp-vendorclass=set:tftp_uefi_x86_64,PXEClient:Arch:00007
dhcp-vendorclass=set:tftp_ieee_ppc_64,PXEClient:Arch:0000e
dhcp-vendorclass=set:tftp_uefi_arm_64,PXEClient:Arch:00011
# Match client type in HTTPClient:Arch and map to a tag
dhcp-vendorclass=set:http_uefi_x86_64,HTTPClient:Arch:00016
dhcp-vendorclass=set:http_uefi_arm_64,HTTPClient:Arch:00019

# IPv6 PXE/HTTP boot client matches (enterprise:343 intel)
# Match client type in PXEClient:Arch and map to a tag
dhcp-vendorclass=set:tftp_bios_x86_pc,enterprise:343,PXEClient:Arch:00000
dhcp-vendorclass=set:tftp_uefi_x86_64,enterprise:343,PXEClient:Arch:00007
dhcp-vendorclass=set:tftp_ieee_ppc_64,enterprise:343,PXEClient:Arch:0000e
dhcp-vendorclass=set:tftp_uefi_arm_64,enterprise:343,PXEClient:Arch:00011
# Match client type in HTTPClient:Arch and map to a tag
dhcp-vendorclass=set:http_uefi_x86_64,enterprise:343,HTTPClient:Arch:00016
dhcp-vendorclass=set:http_uefi_arm_64,enterprise:343,HTTPClient:Arch:00019
EOF

> sudo cat >> /etc/dnsmasq.d/dhcp.conf << 'EOF'

# IPv4 range and options
dhcp-range=set:net0v4,192.168.1.100,192.168.1.199,255.255.255.0,1h
dhcp-option=tag:net0v4,option:domain-search,example.net
dhcp-option=tag:net0v4,option:dns-server,192.168.1.200
dhcp-option=tag:net0v4,option:ntp-server,192.168.1.1
dhcp-option=tag:net0v4,option:router,192.168.1.1
EOF

> sudo cat >> /etc/dnsmasq.d/dhcp.conf << 'EOF'

# IPv4 PXEClient boot
dhcp-boot=tag:net0v4,tag:tftp_bios_x86_pc,/boot/grub2/i386-pc/core.0,192.168.1.200
dhcp-boot=tag:net0v4,tag:tftp_uefi_x86_64,/boot/grub2/x86_64-efi/bootx64.efi,192.168.1.200
dhcp-boot=tag:net0v4,tag:tftp_ieee_ppc_64,/boot/grub2/powerpc-ieee1275/core.elf,192.168.1.200
dhcp-boot=tag:net0v4,tag:tftp_uefi_arm_64,/boot/grub2/arm64-efi/bootaa64.efi,192.168.1.200

# IPv4 HTTPClient boot
dhcp-option-force=tag:net0v4,tag:http_uefi_x86_64,option:vendor-class,HTTPClient
dhcp-boot=tag:net0v4,tag:http_uefi_x86_64,http://192.168.1.200/boot/grub2/x86_64-efi/bootx64.efi
dhcp-option-force=tag:net0v4,tag:http_uefi_arm_64,option:vendor-class,HTTPClient
dhcp-boot=tag:net0v4,tag:http_uefi_arm_64,http://192.168.1.200/boot/grub2/arm64-efi/bootaa64.efi
EOF

> sudo cat >> /etc/dnsmasq.d/dhcp.conf << 'EOF'

# IPv6 range and options
dhcp-range=set:net0v6,2001:db8:0:1:d::,2001:db8:0:1:d::ffff,64,1h
dhcp-option=tag:net0v6,option6:domain-search,example.net
dhcp-option=tag:net0v6,option6:dns-server,[2001:db8:0:1::200]
dhcp-option=tag:net0v6,option6:sntp-server,[2001:db8:0:1::1]
EOF

> sudo cat >> /etc/dnsmasq.d/dhcp.conf << 'EOF'

# IPv6 PXEClient boot
dhcp-option=tag:net0v6,tag:tftp_bios_x86_pc,option6:bootfile-url,tftp://[2001:db8:0:1::200]/boot/grub2/i386-pc/core.0
dhcp-option=tag:net0v6,tag:tftp_uefi_x86_64,option6:bootfile-url,tftp://[2001:db8:0:1::200]/boot/grub2/x86_64-efi/bootx64.efi
dhcp-option=tag:net0v6,tag:tftp_ieee_ppc_64,option6:bootfile-url,tftp://[2001:db8:0:1::200]/boot/grub2/powerpc-ieee1275/core.elf
dhcp-option=tag:net0v6,tag:tftp_uefi_arm_64,option6:bootfile-url,tftp://[2001:db8:0:1::200]/boot/grub2/arm64-efi/bootaa64.efi

# IPv6 HTTPClient boot
# Note: dnsmasq <= 2.90 does not support sending vendor-class option6:16 back to client
EOF

> sudo dnsmasq --test

> sudo systemctl enable --now dnsmasq

> systemctl status dnsmasq

> ss -ulnp | grep :67

> journalctl -u dnsmasq -f

> cat /var/lib/dhcp/dhcpd.leases

> sudo cat > /etc/kea/kea-dhcp4.conf << 'EOF'
{
  "Dhcp4": {
    "interfaces-config": {
      "interfaces": [
        "eno1"
      ]
    },
    "control-socket": {
      "socket-type": "unix",
      "socket-name": "/tmp/kea4-ctrl-socket"
    },
    "lease-database": {
      "type": "memfile",
      "persist": true,
      "name": "/var/lib/kea/dhcp4.leases",
      "lfc-interval": 3600
    },
    "expired-leases-processing": {
      "reclaim-timer-wait-time": 10,
      "flush-reclaimed-timer-wait-time": 25,
      "hold-reclaimed-time": 3600,
      "max-reclaim-leases": 100,
      "max-reclaim-time": 250,
      "unwarned-reclaim-cycles": 5
    },
    "renew-timer": 1800,
    "rebind-timer": 3150,
    "valid-lifetime": 3600,
    "option-data": [],
    "client-classes": [
      {
        "name": "pxeclients#00000",
        "test": "substring(option[60].hex,0,20) == 'PXEClient:Arch:00000'",
        "next-server": "192.168.1.200",
        "boot-file-name": "/boot/grub2/i386-pc/core.0"
      },
      {
        "name": "pxeclients#00007",
        "test": "substring(option[60].hex,0,20) == 'PXEClient:Arch:00007'",
        "next-server": "192.168.1.200",
        "boot-file-name": "/boot/grub2/x86_64-efi/bootx64.efi"
      },
      {
        "name": "pxeclients#0000e",
        "test": "substring(option[60].hex,0,20) == 'PXEClient:Arch:0000e'",
        "next-server": "192.168.1.200",
        "boot-file-name": "/boot/grub2/powerpc-ieee1275/core.elf"
      },
      {
        "name": "pxeclients#00011",
        "test": "substring(option[60].hex,0,20) == 'PXEClient:Arch:00011'",
        "next-server": "192.168.1.200",
        "boot-file-name": "/boot/grub2/arm64-efi/bootaa64.efi"
      },
      {
        "name": "httpclients#00016",
        "test": "substring(option[60].hex,0,21) == 'HTTPClient:Arch:00016'",
        "boot-file-name": "http://192.168.1.200/boot/grub2/x86_64-efi/bootx64.efi",
        "option-data": [
          {
            "name": "vendor-class-identifier",
            "data": "HTTPClient"
          }
        ]
      },
      {
        "name": "httpclients#00019",
        "test": "substring(option[60].hex,0,21) == 'HTTPClient:Arch:00019'",
        "boot-file-name": "http://192.168.1.200/boot/grub2/arm64-efi/bootaa64.efi",
        "option-data": [
          {
            "name": "vendor-class-identifier",
            "data": "HTTPClient"
          }
        ]
      }
    ],
    "subnet4": [
      {
        "id": 1,
        "subnet": "192.168.1.0/24",
        "pools": [
          {
            "pool": "192.168.1.100 - 192.168.1.199"
          }
        ],
        "option-data": [
          {
            "name": "routers",
            "data": "192.168.1.1"
          },
          {
            "name": "ntp-servers",
            "data": "192.168.1.1"
          },
          {
            "name": "domain-name-servers",
            "data": "192.168.1.200"
          },
          {
            "name": "domain-search",
            "data": "example.net"
          }
        ],
        "reservations": []
      }
    ],
    "loggers": [
      {
        "name": "kea-dhcp4",
        "output-options": [
          {
            "output": "/var/log/kea/dhcp4.log"
          }
        ],
        "severity": "INFO",
        "debuglevel": 0
      }
    ]
  }
}
EOF

> sudo mkdir -p /var/log/kea

> sudo kea-dhcp4 -t /etc/kea/kea-dhcp4.conf

> sudo systemctl enable --now kea-dhcp4

> sudo cat > /etc/kea/kea-dhcp6.conf << 'EOF'
{
  "Dhcp6": {
    "interfaces-config": {
      "interfaces": [
        "eno1"
      ]
    },
    "control-socket": {
      "socket-type": "unix",
      "socket-name": "/tmp/kea6-ctrl-socket"
    },
    "lease-database": {
      "type": "memfile",
      "persist": true,
      "name": "/var/lib/kea/dhcp6.leases",
      "lfc-interval": 3600
    },
    "expired-leases-processing": {
      "reclaim-timer-wait-time": 10,
      "flush-reclaimed-timer-wait-time": 25,
      "hold-reclaimed-time": 3600,
      "max-reclaim-leases": 100,
      "max-reclaim-time": 250,
      "unwarned-reclaim-cycles": 5
    },
    "renew-timer": 1800,
    "rebind-timer": 2880,
    "preferred-lifetime": 3600,
    "valid-lifetime": 7200,
    "option-data": [],
    "option-def": [],
    "client-classes": [
      {
        "name": "pxeclients#00000",
        "test": "substring(option[16].hex,6,20) == 'PXEClient:Arch:00000'",
        "option-data": [
          {
            "name": "bootfile-url",
            "data": "tftp://[2001:db8:0:1::200]/boot/grub2/i386-pc/core.0"
          }
        ]
      },
      {
        "name": "pxeclients#00007",
        "test": "substring(option[16].hex,6,20) == 'PXEClient:Arch:00007'",
        "option-data": [
          {
            "name": "bootfile-url",
            "data": "tftp://[2001:db8:0:1::200]/boot/grub2/x86_64-efi/bootx64.efi"
          }
        ]
      },
      {
        "name": "pxeclients#0000e",
        "test": "substring(option[16].hex,6,20) == 'PXEClient:Arch:0000e'",
        "option-data": [
          {
            "name": "bootfile-url",
            "data": "tftp://[2001:db8:0:1::200]/boot/grub2/powerpc-ieee1275/core.elf"
          }
        ]
      },
      {
        "name": "pxeclients#00011",
        "test": "substring(option[16].hex,6,20) == 'PXEClient:Arch:00011'",
        "option-data": [
          {
            "name": "bootfile-url",
            "data": "tftp://[2001:db8:0:1::200]/boot/grub2/arm64-efi/bootaa64.efi"
          }
        ]
      }
    ],
    "subnet6": [
      {
        "id": 1,
        "subnet": "2001:db8:0:1::/64",
        "interface": "eno1",
        "pools": [
          {
            "pool": "2001:db8:0:1:d::/112"
          }
        ],
        "option-data": [
          {
            "name": "sntp-servers",
            "data": "2001:db8:0:1::1"
          },
          {
            "name": "dns-servers",
            "data": "2001:db8:0:1::200"
          },
          {
            "name": "domain-search",
            "data": "example.net"
          }
        ],
        "reservations": []
      }
    ],
    "loggers": [
      {
        "name": "kea-dhcp6",
        "output-options": [
          {
            "output": "/var/log/kea/dhcp6.log"
          }
        ],
        "severity": "INFO",
        "debuglevel": 0
      }
    ]
  }
}
EOF

> sudo kea-dhcp6 -t /etc/kea/kea-dhcp6.conf

> sudo systemctl enable --now kea-dhcp6

> systemctl status kea-dhcp4

> systemctl status kea-dhcp6

> ss -ulnp | grep -E ":67|:547"

> tail -f /var/log/kea/dhcp4.log

> tail -f /var/log/kea/dhcp6.log

> cat /var/lib/kea/dhcp4.leases

> sudo cat > /etc/dhcpd.conf << 'EOF'
# /etc/dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#
# *** PLEASE CONFIGURE IT FIRST ***
#
# Don't forget to set the DHCPD_INTERFACE in the
# /etc/sysconfig/dhcpd file.
#

# if you want to use dynamical DNS updates, you should first read
# read /usr/share/doc/packages/dhcp-server/DDNS-howto.txt
#
ddns-updates off;

# Use this to enable / disable dynamic dns updates globally.
ddns-update-style none;

# default lease time
default-lease-time              3600;
max-lease-time                  7200;

##
## PXE / HTTP boot option declarations
##
class "pxeclients" {
        # PXEClient:Arch:00000:UNDI:002001
        match substring (option vendor-class-identifier, 0, 20);
}
class "httpclients" {
        # HTTPClient:Arch:00016:UNDI:003001
        match substring (option vendor-class-identifier, 0, 21);
}

##
## PXE / HTTP boot subclass request matches
##
subclass "pxeclients"   "PXEClient:Arch:00000" {
        next-server     192.168.1.200;
        filename        "/boot/grub2/i386-pc/core.0";
}
subclass "pxeclients"   "PXEClient:Arch:00007" {
        next-server     192.168.1.200;
        filename        "/boot/grub2/x86_64-efi/bootx64.efi";
}
subclass "pxeclients"   "PXEClient:Arch:0000e" {
        next-server     192.168.1.200;
        filename        "/boot/grub2/powerpc-ieee1275/core.elf";
}
subclass "pxeclients"   "PXEClient:Arch:00011" {
        next-server     192.168.1.200;
        filename        "/boot/grub2/arm64-efi/bootaa64.efi";
}

subclass "httpclients"  "HTTPClient:Arch:00016" {
        option vendor-class-identifier "HTTPClient";
        filename        "http://192.168.1.200/boot/grub2/x86_64-efi/bootx64.efi";
}
subclass "httpclients"  "HTTPClient:Arch:00019" {
        option vendor-class-identifier "HTTPClient";
        filename        "http://192.168.1.200/boot/grub2/arm64-efi/bootaa64.efi";
}

##
## Subnet declaration for the pxe network
##
subnet 192.168.1.0 netmask 255.255.255.0 {
        authoritative;

        range  dynamic-bootp            192.168.1.100 192.168.1.199;

        option subnet-mask              255.255.255.0;

        option routers                  192.168.1.1;
        option ntp-servers              192.168.1.1;
        option domain-name-servers      192.168.1.200;
        option domain-name              "example.net";
        option domain-search            "example.net";
}
EOF

> sudo echo 'DHCPD_INTERFACE="eno1"' > /etc/sysconfig/dhcpd

> sudo dhcpd -t -cf /etc/dhcpd.conf

> sudo systemctl enable --now dhcpd

> sudo cat > /etc/dhcpd6.conf << 'EOF'
# /etc/dhcpd6.conf
#
# Sample DHCPv6 configuration file for ISC dhcpd
#
# *** PLEASE CONFIGURE IT FIRST ***
#
# Don't forget to set the DHCPD6_INTERFACE in the
# /etc/sysconfig/dhcpd file.
#

# if you want to use dynamical DNS updates, you should first
# read /usr/share/doc/packages/dhcp-server/DDNS-howto.txt
ddns-updates off;

# Use this to enable / disable dynamic dns updates globally.
ddns-update-style none;

# IPv6 address valid lifetime
#  (at the end the address is no longer usable by the client)
#  (set to 30 days, the usual IPv6 default)
default-lease-time 7200;

# IPv6 address preferred lifetime
#  (at the end the address is deprecated, i.e., the client should use
#   other addresses for new connections)
#  (set to 7 days, the	usual IPv6 default)
preferred-lifetime 3600;

##
## PXE / HTTP boot option declarations
##

# The dhcp6 option 16 is in fact an:
#   { uint32 enterprise-number, array of { uint16 len, string tag} vendor-class-data }
# this declaration is using the whole option data as string for substring match:
option dhcp6.vendor-class-as-string code 16 = string;

# this declaration is using the enterprise-number with 1st tag length and string:
option dhcp6.vendor-class-en-len-tag code 16 = {integer 32, integer 16, string};

class "pxeclients" {
        # PXEClient:Arch:00000:UNDI:002001
        # note: +6 to skip the enterprise-number+len until the PXEClient string
        match substring (option dhcp6.vendor-class-as-string, 6, 20);
}
class "httpclients" {
        # HTTPClient:Arch:00016:UNDI:003001
        # note: +6 to skip the enterprise-number+len until the HTTPClient string
        match substring (option dhcp6.vendor-class-as-string, 6, 21);
}

##
## PXE / HTTP boot subclass request matches
##
subclass "pxeclients"   "PXEClient:Arch:00000" {
        option dhcp6.bootfile-url "tftp://[2001:db8:0:1::200]/boot/grub2/i386-pc/core.0";
}
subclass "pxeclients"   "PXEClient:Arch:00007" {
        option dhcp6.bootfile-url "tftp://[2001:db8:0:1::200]/boot/grub2/x86_64-efi/bootx64.efi";
}
subclass "pxeclients"   "PXEClient:Arch:0000e" {
        option dhcp6.bootfile-url "tftp://[2001:db8:0:1::200]/boot/grub2/powerpc-ieee1275/core.elf";
}
subclass "pxeclients"   "PXEClient:Arch:00011" {
        option dhcp6.bootfile-url "tftp://[2001:db8:0:1::200]/boot/grub2/arm64-efi/bootaa64.efi";
}

subclass "httpclients"  "HTTPClient:Arch:00016" {
        option dhcp6.vendor-class-en-len-tag 343 10 "HTTPClient";
        option dhcp6.bootfile-url "http://[2001:db8:0:1::200]/boot/grub2/x86_64-efi/bootx64.efi";
}
subclass "httpclients"  "HTTPClient:Arch:00019" {
        option dhcp6.vendor-class-en-len-tag 343 10 "HTTPClient";
        option dhcp6.bootfile-url "http://[2001:db8:0:1::200]/boot/grub2/arm64-efi/bootaa64.efi";
}

##
## Subnet declaration for the pxe network
##
subnet6 2001:db8:0:1::/64 {
       authoritative;

       range6  2001:db8:0:1:d:: 2001:db8:0:1:d::ffff;

       option dhcp6.sntp-servers       2001:db8:0:1::1;
       option dhcp6.name-servers       2001:db8:0:1::200;
       option dhcp6.domain-search      "example.net";
}
EOF

> sudo echo 'DHCPD6_INTERFACE="eno1"' >> /etc/sysconfig/dhcpd

> sudo dhcpd -6 -t -cf /etc/dhcpd6.conf

> sudo systemctl enable --now dhcpd6

> systemctl status dhcpd

> systemctl status dhcpd6

> ss -ulnp | grep -E ":67|:547"

> journalctl -u dhcpd -f

> cat /var/lib/dhcp/dhcpd.leases

> journalctl -u dhcpd6 -f

> systemctl status tftp.socket

> systemctl status nginx

> systemctl status dnsmasq

> systemctl status dhcpd

> systemctl status dnsmasq

> systemctl status kea-dhcp4 kea-dhcp6

> systemctl status radvd

> systemctl status chronyd

> tftp localhost -c get /boot/grub2/x86_64-efi/bootx64.efi /tmp/test-bootx64.efi

> file /tmp/test-bootx64.efi

> rm /tmp/test-bootx64.efi

> curl -I http://localhost/boot/grub2/grub.cfg

> curl -I http://localhost/boot/images/SLES-16.0/x86_64/liveiso/LiveOS/squashfs.img

> nslookup pxe.example.net localhost

> curl http://localhost/boot/

> ss -ulnp | grep -E ":67|:547"

> journalctl -u dhcpd -f

> journalctl -u dnsmasq -f

> dhcping -s 192.168.1.200

> cat /var/lib/dhcp/dhcpd.leases

> cat /var/lib/kea/dhcp4.leases

> journalctl -f | grep -E "dhcp|tftp|nginx"

http://CLIENT_IP_ADDRESS

# journalctl -u agama-web-server -f

# curl -I http://192.168.1.200/install/SLES-16.0/x86_64/