mirror of
https://github.com/xcat2/xcat-core.git
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249 lines
9.2 KiB
Perl
Executable File
249 lines
9.2 KiB
Perl
Executable File
#!/usr/bin/perl
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# xCAT postscript for configuring bonding of nics.
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# Usage: configbond bond1 eth1 [eth3]
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#
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# Note: this postscript currently has some assumptions that are specific to the softlayer environment.
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# We only use this to configure bond1, because bond0 gets configured by the node provisioning process.
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# (altho this script would work for bond0)
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use strict;
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# Check number of args
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my $nargs = $#ARGV + 1;
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if (scalar(@ARGV) < 2 || scalar(@ARGV) > 3) {
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system("logger -t xcat -p local4.err 'Usage: configbond <bond> <dev0> [<dev1>]'");
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exit 1;
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}
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my $bond = shift(@ARGV);
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my $nic = $ARGV[0];
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my @devs;
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push(@devs,@ARGV);
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my $nicips = $ENV{NICIPS};
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my $nicnetworks = $ENV{NICNETWORKS};
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my $net_cnt = $ENV{NETWORKS_LINES};
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#todo: change this script so they dont need to specify nicnetworks
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if (!$nicips || !$nicnetworks) { system("logger -t xcat -p local4.err 'configbond: must specify attributes nicips and nicnetworks in the xcat db for this node.'"); exit 1; }
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#todo: these are specific to softlayer. They should be another attribute or argument
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my $bondingopts = 'mode=4 miimon=100 downdelay=0 updelay=0 lacp_rate=fast xmit_hash_policy=1';
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my $netmask ='';
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my $ipaddr = '';
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my $nic_num = '';
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my $subnet = '';
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my $nic_net = '';
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my $net_name = '';
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my @nic_nets = (); # array of networks for this nic
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my @nic_ips =(); # array of ipaddresses for this nic
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my @networks = (); # array of all networks from networks table.
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# { network_name, subnet, netmask }
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system("logger -t xcat -p local4.err 'configbond: Master: $bond'");
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system("logger -t xcat -p local4.err 'configbond: Slaves: @devs'");
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#system("logger -t xcat -p local4.err 'configbond: NIC: $nic'");
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system("logger -t xcat -p local4.err 'configbond: NICNETWORKS: $nicnetworks'");
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system("logger -t xcat -p local4.err 'configbond: NICIPS: $nicips'");
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# Update modprobe
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my $file = "/etc/modprobe.d/$bond.conf";
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if (!open(FILE, ">$file")) { system("logger -t xcat -p local4.err 'configbond: cannot open $file.'"); exit 1; }
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print FILE "alias $bond bonding\n";
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# the bonding options are put in the ifcfg file instead
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#print FILE "options $bond mode=balance-rr miimon=100\n";
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close FILE;
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# create array of network info. Needed in case where there are
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# more than one ip address per nic and shouldn't be many networks.
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my $net_info;
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my $cnt = 1;
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while ( $cnt <= $net_cnt ) {
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$net_info = $ENV{"NETWORKS_LINE$cnt"};
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$net_info =~ /^netname=([^\|]*)\|\|/;
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$net_name = $1;
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$net_info =~ /net=([^\|]*)\|\|/;
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$subnet = $1;
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$net_info =~ /mask=([^\|]*)\|\|/;
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$netmask = $1;
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push @{ $networks[$cnt-1] }, ($net_name, $subnet, $netmask);
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$cnt +=1;
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}
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# get network or networks for this nic from NICNETWORKS:
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# eth0:1_0_0_0-255_255_0_0|network2,eth1:1_1_0_0
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# create array of networks for this nic
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foreach my $nic_networks (split(/,/,$nicnetworks)) {
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my @net = ();
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if ( $nic_networks =~ /!/ ) {
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@net = split(/!/,$nic_networks);
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} else {
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@net = split(/:/,$nic_networks);
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}
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if ($net[0] eq $nic) {
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@nic_nets = split(/\|/,$net[1]);
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last;
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}
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}
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# get all nic ipaddress from $nicips: i.e. eth0:1.0.0.1|2.0.0.1,eth1:1.1.1.1
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# Then get all ips for this specific nic, i.e. eth0.
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foreach my $ips (split(/,/,$nicips)) {
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my @ip = ();
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if ( $ips =~ /!/ ) {
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@ip = split(/!/,$ips);
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} else {
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@ip = split(/:/,$ips);
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}
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if ($ip[0] eq $nic ) {
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@nic_ips = split(/\|/,$ip[1]);
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}
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}
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my $i;
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for ($i=0; $i < (scalar @nic_ips) ; $i++ ) {
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# Time to create the interfaces.
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# loop through the nic networks, find the matching networks to get the
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# subnet and netmask and then create the appropriate ifcfg file for linux
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my $specific_nic = $nic;
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if ($i > 0) {
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$specific_nic = $nic . ":" . ($i);
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}
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#todo: support case in which nicnetworks is not specified, find the correct network by calculation
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$cnt = 0;
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$subnet = "";
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$netmask = "";
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$net_name = "";
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while ( $cnt < $net_cnt ) {
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if ( $networks[$cnt][0] eq $nic_nets[$i] ) {
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$subnet = $networks[$cnt][1];
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$netmask = $networks[$cnt][2];
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$cnt = $net_cnt; # found match - get out.
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}
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else {
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$cnt++;
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}
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}
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# check that there is a subnet and netmask set
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if ( !(length($subnet) > 0) || !(length($netmask) > 0) ) {
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system("logger -t xcat -p local4.err 'configbond: network subnet or netmask not set.'");
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exit 1;
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}
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system("logger -t xcat -p local4.err 'configbond: network subnet and netmask: $subnet, $netmask'");
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system("logger -t xcat -p local4.err 'configbond: $specific_nic, $nic_ips[$i]'");
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# Write the master info to the ifcfg file
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if (-d "/etc/sysconfig/network-scripts") {
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# rhel/centos/fedora
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my $dir = "/etc/sysconfig/network-scripts";
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if (!open(FILE, ">$dir/ifcfg-$bond")) { system("logger -t xcat -p local4.err 'configbond: cannot open $dir/ifcfg-$bond.'"); exit 1; }
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print FILE "DEVICE=$bond\n";
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print FILE "BOOTPROTO=none\n";
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print FILE "IPADDR=$nic_ips[$i]\n";
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print FILE "NETMASK=$netmask\n";
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print FILE "ONBOOT=yes\n";
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print FILE "USERCTL=no\n";
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print FILE qq(BONDING_OPTS="$bondingopts"\n);
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close FILE;
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# Configure slaves
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my @output = `ip addr show 2>&1`; # to check for existance of the device later
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foreach my $dev (@devs) {
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# as a convenience, make sure the device exists before adding it to the bond
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if (!grep(m/^\d+:\s+$dev:/, @output)) {
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system("logger -t xcat -p local4.err 'configbond: not configuring $dev because it does not exist.'");
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unlink("$dir/ifcfg-$dev"); # in case it was left over in the image we are cloning
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next;
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}
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system("logger -t xcat -p local4.err 'configbond: slave dev: $dev'");
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if (!open(FILE, ">$dir/ifcfg-$dev")) { system("logger -t xcat -p local4.err 'configbond: cannot open $dir/ifcfg-$dev'"); exit 1; }
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print FILE "DEVICE=$dev\n";
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print FILE "BOOTPROTO=none\n";
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print FILE "MASTER=$bond\n";
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print FILE "ONBOOT=yes\n";
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print FILE "SLAVE=yes\n";
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print FILE "USERCTL=no\n";
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close FILE;
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}
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}
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elsif (-d "/etc/sysconfig/network") {
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# sles
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my $dir = "/etc/sysconfig/network";
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if (!open(FILE, ">$dir/ifcfg-$bond")) { system("logger -t xcat -p local4.err 'configbond: cannot open $dir/ifcfg-$bond.'"); exit 1; }
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print FILE "BOOTPROTO=static\n";
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print FILE "BONDING_MASTER=yes\n";
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print FILE "BONDING_MODULE_OPTS='$bondingopts'\n";
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print FILE "NAME='Bonded Interface'\n";
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print FILE "IPADDR=$nic_ips[$i]\n";
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print FILE "NETMASK=$netmask\n";
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print FILE "STARTMODE=onboot\n";
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print FILE "USERCONTROL=no\n";
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my $devnum = 0;
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my @output = `ip addr show 2>&1`; # to check for existance of the device later
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foreach my $dev (@devs) {
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if (!grep(m/^\d+:\s+$dev:/, @output)) { next; }
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print FILE "BONDING_SLAVE_$devnum=$dev\n";
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$devnum++;
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}
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close FILE;
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# Configure slaves
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foreach my $dev (@devs) {
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# as a convenience, make sure the device exists before adding it to the bond
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if (!grep(m/^\d+:\s+$dev:/, @output)) {
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system("logger -t xcat -p local4.err 'configbond: not configuring $dev because it does not exist.'");
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unlink("$dir/ifcfg-$dev"); # in case it was left over in the image we are cloning
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next;
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}
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system("logger -t xcat -p local4.err 'configbond: slave dev: $dev'");
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if (!open(FILE, ">$dir/ifcfg-$dev")) { system("logger -t xcat -p local4.err 'configbond: cannot open $dir/ifcfg-$dev'"); exit 1; }
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print FILE "BOOTPROTO=none\n";
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print FILE "STARTMODE=hotplug\n";
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close FILE;
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}
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}
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else {
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# do not recognize this distro
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system("logger -t xcat -p local4.err 'configbond: network directory is not either the Red Hat or SuSE format.'");
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exit 1;
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}
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# Apply the changes. Since we are only doing bond1 right now, lets not restart the whole network
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# so we dont disrupt the installnic connection. Instead we just need to bring down the slave nics,
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# and then bring up the bond nic.
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#runcmd("service network restart");
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foreach my $dev (@devs) {
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runcmd("ifdown $dev");
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}
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runcmd("ifdown $bond"); # in case it was already up
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runcmd("ifup $bond"); # note: this wont reload the bonding kernel module, so we are depending on the provisioning process to already have set the correct bonding options
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system("logger -t xcat -p local4.info 'configbond: successfully configured $specific_nic.'");
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}
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exit 0;
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sub runcmd {
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my $cmd = shift @_;
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$cmd .= ' 2>&1';
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my @output = `$cmd`;
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my $rc = $? >> 8;
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if ($rc) {
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system("logger -t xcat -p local4.err 'configeth: command $cmd failed with rc $rc: " . join('',@output) . "'");
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my $errout= "configeth: command $cmd failed with rc $rc.";
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`echo $errout`;
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exit $rc;
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}
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}
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