cobbler的理解

cobbler的过程需要用到 cobbler服务器 dhcp服务器需要用到http服务器 tftp服务器客户端pc
其中几个关键部位cobbler和dhcp
cobbler可以通过rsync同步接管dhcp的配置此时就需要清醒的认识到是否需要接管
cobbler的配置文件中关于 manage dhcp 0 1 0表示不接管 1 表示接管
不接管的话dhcp的服务器大多和cobbler服务器不是同一台此时在配置dhcp的服务器的时候需要指定的next-server给cobbler服务器的IP地址贴个配置文件如下；

# ******************************************************************
# Cobbler managed dhcpd.conf file
# generated from cobbler dhcp.conf template (Wed Dec  5 02:42:02 2018)
# Do NOT make changes to /etc/dhcpd.conf. Instead, make your changes
# in /etc/cobbler/dhcp.template, as /etc/dhcpd.conf will be
# overwritten.
# ******************************************************************

ddns-update-style interim;    
allow booting;
allow bootp;

ignore client-updates;
set vendorclass = option vendor-class-identifier;

option pxe-system-type code 93 = unsigned integer 16;

subnet 192.168.3.0 netmask 255.255.255.0 {
     option routers             192.168.3.2;
     option domain-name-servers 192.168.3.2;
     option subnet-mask         255.255.255.0;
     range dynamic-bootp        192.168.3.100 192.168.3.254;
     default-lease-time         21600;
     max-lease-time             43200;
     next-server                192.168.3.128; #该条需要指定cobbler服务器ip
 host cobbler {                                   
                hardware ethernet 00:0c:29:fc:bb:d0;      # host cobbler 该条指定某个pc的静态IP
                fixed-address 192.168.3.128;
        }
 class "pxeclients" {
          match if substring (option vendor-class-identifier, 0, 9) = "PXEClient";
          if option pxe-system-type = 00:02 {
                  filename "ia64/elilo.efi";
          } else if option pxe-system-type = 00:06 {
                  filename "grub/grub-x86.efi";
          } else if option pxe-system-type = 00:07 {
                  filename "grub/grub-x86_64.efi";
          } else {
                  filename "pxelinux.0";
          }

manage=1的时候 cobbler和dhcp服务大多基于一台服务器上，此时dhcp的配置基本可以省略，在安装完dhcp的服务后，进入cobbler的dhcp关联文件 /etc/cobbler/dhcpd.default 配置如上代码，
每次更改后需要同步 cobbler sync

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