a7c493a96b
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@9645 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
114 lines
3.2 KiB
Plaintext
114 lines
3.2 KiB
Plaintext
=head1 NAME
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B<makedhcp> - Creates and updates dhcp configuration files.
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=head1 SYNOPSIS
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B<makedhcp> B<-n>
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B<makedhcp> B<-a>
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B<makedhcp> B<-a -d>
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B<makedhcp> B<-d> I<noderange>
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B<makedhcp> I<noderange> [B<-s> I<statements>]
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B<makedhcp> I<noderange> B<--hfi>
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B<makedhcp> [I<-h|--help>]
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=head1 DESCRIPTION
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The B<makedhcp> command configures the DHCP daemon on the local system so that xCAT can manage the nodes of the cluster during discovery, full install, diskless booting, and normal booting.
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The B<makedhcp> command is supported for both Linux and AIX clusters.
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With the B<-n> option, B<makedhcp> will create a new dhcp configuration file. For Linux systems this will include certain general parameters such as a dynamic range and omapi configuration.
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Before using the B<-n> option make sure there is nothing in the configuration file that you wish to preserve. If a configuration file already exist the B<makedhcp> command will create a backup before creating a new one.
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With a noderange or the B<-a> option, B<makedhcp> will inject configuration data pertinent to the specified nodes that immediately takes effect without a restart of DHCP.
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If the B<-d> flag is used with the B<-a> flag then B<makedhcp> will delete all nodes' dhcp host definitions. The B<-d> flag followed by a I<noderange> will delete the dhcp host definitons for the noderange.
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The B<makedhcp> command also uses the following attributes from the xCAT database:
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B<site.dhcpinterfaces>, B<site.domain>, B<site.nameservers>, B<networks.dynamicrange>, B<networks.dhcpserver>, B<networks.nameservers>. See the B<xcatdb> man page for details about the database attributes.
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=head1 OPTIONS
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=over 12
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=item B<-n>
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Create a new dhcp configuration file with a network statement for each network the dhcp daemon should listen on. The B<makedhcp> command will automatically restart the dhcp daemon after this operation. This option will replace any existing configuration file!
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=item B<-a>
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Define all nodes to the DHCP server. (Will only add nodes that can be reached, network-wise, by this DHCP server.) The dhcp daemon does not have to be restarted after this.
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=item I<noderange>
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Add the specified nodes to the DHCP server configuration.
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=item [B<-s> I<statements>]
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For the input noderange, the argument will be interpreted like dhcp configuration file text.
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=item B<-a -d>
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Delete all nodes from the DHCP server configuration.
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=item B<-d> I<noderange>
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Delete all nodes in the noderange from the DHCP server configuration.
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=item B<--hfi> I<noderange>
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Add the specified nodes to the DHCP server configuration with HFI device type.
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=item B<-h>
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Display usage message.
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=back
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=head1 RETURN VALUE
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0 The command completed successfully.
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1 An error has occurred.
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=head1 EXAMPLES
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=over 3
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=item 1.
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Add the network definitions to DHCP by updating the dhcp configuration file:
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makedhcp -n
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=item 2.
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Define all nodes to the dhcp server:
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makedhcp -a
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=item 3.
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Will cause dhcp on the next request to set root-path appropriately for only node5. Note some characters (e.g. ") must be doubly escaped (once for the shell, and once for the OMAPI layer).
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makedhcp node5 -s 'option root-path \"172.16.0.1:/install/freebsd6.2/x86_64\";'
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=back
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=head1 SEE ALSO
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L<noderange(3)|noderange.3>
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