322fde4ed9
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@16303 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
155 lines
4.3 KiB
Plaintext
155 lines
4.3 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> [B<-l>|B<--localonly>]
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B<makedhcp> B<-a> [B<-l>|B<--localonly>]
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B<makedhcp> B<-a -d> [B<-l>|B<--localonly>]
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B<makedhcp> B<-d> I<noderange> [B<-l>|B<--localonly>]
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B<makedhcp> I<noderange> [B<-s> I<statements>] [B<-l>|B<--localonly>]
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B<makedhcp> B<-q> I<noderange>
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B<makedhcp> [I<-h|--help>]
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=head1 DESCRIPTION
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The B<makedhcp> command creates and updates the DHCP configuration on the management node and service nodes.
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The B<makedhcp> command is supported for both Linux and AIX clusters.
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=over 3
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=item 1.
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Start by filling out the L<networks(5)|networks.5> table properly.
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=item 2.
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Then use the B<makedhcp -n> option to create a new dhcp configuration file.
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You can set the site table, dhcplease attribute to the lease time for the dhcp client. The default value is 43200.
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=item 3.
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Next, get the node IP addresses and MACs defined in the xCAT database.
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Also, get the hostnames and IP addresses pushed to /etc/hosts (using L<makehosts(8)|makehosts.8>) and to DNS (using L<makedns(8)|makedns.8>).
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=item 4.
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Then run B<makedhcp> with a noderange or the B<-a> option. This will inject into dhcpd configuration data pertinent to the specified nodes.
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On linux, the configuration information immediately takes effect without a restart of DHCP.
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=back
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If you need to delete node entries from the DHCP configuration, use the B<-d> flag.
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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.
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(Which networks dhcpd should listen on can be controlled by the dhcpinterfaces attribute in the L<site(5)|site.5> table.)
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The B<makedhcp> command will automatically restart the dhcp daemon after this operation.
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This option will replace any existing configuration file (making a backup of it first).
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For Linux systems the file will include network entries as well as certain general parameters such as a dynamic range and omapi configuration.
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For AIX systems the file will include network entries.
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On AIX systems, if there are any non-xCAT entries in the existing configuration file they will be preserved and added to the end of the new 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.)
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The dhcp daemon does not have to be restarted after this.
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On AIX systems B<makedhcp> will not add entries for cluster nodes that will be installed using NIM. The entries for these nodes will be managed by NIM.
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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<-d> I<noderange>
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Delete node entries from the DHCP server configuration. On AIX, any entries created by NIM will not be removed.
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=item B<-a -d>
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Delete all node entries, that were added by xCAT, from the DHCP server configuration.
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=item B<-l>|B<--localonly>
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Configure dhcpd on the local machine only. Without this option, makedhcp will also send this
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operation to any service nodes that service the nodes in the noderange.
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=item B<-q> I<noderange>
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Query the node entries from the DHCP server configuration. On AIX, any entries created by NIM will not be listed.
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=item B<-h|--help>
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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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Create a new DHCP configuration file and add the network definitions:
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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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Note: This does not add nodes that will be installed with AIX/NIM.
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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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=item 4.
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Query a node from the DHCP server.
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# makedhcp -q node01
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node01: ip-address = 91.214.34.156, hardware-address = 00:00:c9:c6:6c:42
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=back
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=head1 FILES
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DHCP configuration files:
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[AIX] /etc/dhcpsd.cnf
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[SLES] /etc/dhcpd.conf
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[RH] /etc/dhcp/dhcpd.conf
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=head1 SEE ALSO
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L<noderange(3)|noderange.3>
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