/usr/sbin/fence_na is in fence-agents 3.1.5-2ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | #!/usr/bin/perl
#
# Node Assassin - Fence Agent
# Digimer; digimer@alteeve.com
# Nov. 25, 2010
# Version: 1.1.6
#
# This software is released under the GPL v2. See the LICENSE file in the
# configuration directory for a copy of the GPL v2.
#
# Bugs;
# - None known, many expected
#
# Play safe!
use strict;
use warnings;
# Load our library.
require '/usr/share/fence/fence_na.lib';
# IO::Handle is used for logging and Net::Telnet is used for communicating with
# the Node Assassin(s).
use IO::Handle;
use Net::Telnet;
# These are the default values and will be over-written by the config file's
# variables which in turn can, in some cases, be over-written by command line
# arguments.
# Please see '/etc/cluster/fence_na.conf' for details on each option.
my $conf={
'system' => {
max_valid_state => 3,
conf_file => "/etc/cluster/fence_na.conf",
quiet => "",
version => 0,
list => "",
monitor => "",
na_id => 0,
got_cla => 0, # This is set if command line arguments are read.
debug => 0,
},
na => {
ipaddr => "",
tcp_port => "238",
port => "",
login => "",
passwd => "",
port => "",
set_state => "",
passwd_script => "",
action => "",
agent => "", # This is only used by 'fenced'
na_name => "", # This is used for the 'list' function.
handle => "",
max_node => 0,
set_state => [], # This array will store the states to set based on the action passed for the proper ports.
}
};
# This method can't pass in the '$log' handle, obviously, as it does not yet
# exist.
read_conf($conf);
# Log file for output.
my $log=IO::Handle->new();
print "Opening: [$conf->{'system'}{'log'}] for logging.\n" if $conf->{'system'}{debug};
open ($log, ">$conf->{'system'}{'log'}") || die "Failed to open: [$conf->{'system'}{'log'}] for writing; Error: $!\n";
# Set STDOUT and $log to hot (unbuffered) output.
if (1)
{
select $log;
$|=1;
select STDOUT;
$|=1;
}
# If this gets set in the next two function, the agent will exit.
my $bad=0;
# Read in arguments from the command line.
($bad)=read_cla($conf, $log, $bad);
# Now read in arguments from STDIN, which is how 'fenced' passes arguments.
($bad)=read_stdin($conf, $log, $bad);
# This makes sure the node ID is either zero-padded or '00'.
$conf->{na}{port}=$conf->{na}{port} ? $conf->{na}{port}=sprintf("%02d", $conf->{na}{port}) : "00";
record($conf, $log, "Will use port: [$conf->{na}{port}]\n") if $conf->{'system'}{debug};
# Find the TCP port from the config file.
foreach my $i (1..$conf->{'system'}{na_num})
{
if ((lc($conf->{na}{$i}{ipaddr}) eq lc($conf->{na}{ipaddr})))
{
$conf->{'system'}{na_id}=$i;
record($conf, $log, __LINE__."; system::na_id: [$conf->{'system'}{na_id}]\n") if $conf->{'system'}{debug};
$conf->{na}{tcp_port}=$conf->{na}{$i}{tcp_port};
record($conf, $log, __LINE__."; na::tcp_port: [$conf->{na}{tcp_port}]\n") if $conf->{'system'}{debug};
$conf->{na}{na_name}=$conf->{na}{$i}{na_name} ? $conf->{na}{$i}{na_name} : "Node Assassin #$i";
record($conf, $log, __LINE__."; na::na_name: [$conf->{na}{na_name}]\n") if $conf->{'system'}{debug};
$conf->{na}{max_nodes}=$conf->{na}{$i}{max_nodes};
record($conf, $log, __LINE__."; na::max_nodes: [$conf->{na}{max_nodes}]\n") if $conf->{'system'}{debug};
}
}
die "Exiting on errors.\n" if $bad;
my @ny=("no", "yes");
record($conf, $log, "Node Assassin: . [$conf->{na}{ipaddr}].\n");
record($conf, $log, "TCP Port: ...... [$conf->{na}{tcp_port}].\n");
record($conf, $log, "Node: .......... [$conf->{na}{port}].\n");
record($conf, $log, "Login: ......... [$conf->{na}{login}].\n");
record($conf, $log, "Password: ...... [$conf->{na}{passwd}].\n");
record($conf, $log, "Action: ........ [$conf->{na}{action}].\n");
record($conf, $log, "Version Request: [".$ny[$conf->{'system'}{version}]."].\n");
record($conf, $log, "Done reading args.\n");
# If I've been asked to show the version information, do so and then exit.
record($conf, $log, "Version: ..... [$conf->{'system'}{version}].\n") if $conf->{'system'}{debug};
if ($conf->{'system'}{version})
{
version($conf, $log);
do_exit($conf, $log, 0);
}
# Connect to the Node Assassin.
connect_to_na($conf, $log);
# Validate credentials.
# NOTE: Checking before the telnet fails on the exit. Also, this will be moved
# into the Node Assassin soon anyway.
if (($conf->{na}{login} ne $conf->{'system'}{username}) or ($conf->{na}{passwd} ne $conf->{'system'}{password}))
{
record($conf, $log, "Username and/or password invalid. Did you use the command line switches properly?\n");
do_exit($conf, $log, 8);
}
###############################################################################
# What do? #
###############################################################################
# When asked to 'monitor' or 'list'. being multi-port, this will return a CSV
# of nodes and their aliases where found in the config file.
record($conf, $log, "Action: ........ [$conf->{na}{action}].\n") if $conf->{'system'}{debug};
if (($conf->{na}{action} eq "monitor") or ($conf->{na}{action} eq "list"))
{
record($conf, $log, "Calling the 'show_list' function.\n") if $conf->{'system'}{debug};
show_list($conf, $log);
do_exit($conf, $log, 0);
}
# If I made it this far, I am setting a state. Sort out what state from the
# values in my conf->{na} hash.
record($conf, $log, "Setting node: [$conf->{na}{port}] to action: [$conf->{na}{action}] using the Node Assassin: [$conf->{na}{ipaddr}] using the login: [$conf->{na}{login}]\n") if $conf->{'system'}{debug};
# Convert the action into Node Assassin protocol arguments.
process_action($conf, $log);
# Now execute the action plan.
my $exit_code=do_actions($conf, $log);
record($conf, $log, "All calls complete, exiting.\n") if $conf->{'system'}{debug};
# Cleanup and exit.
do_exit($conf, $log, $exit_code);
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