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xcat-core/perl-xCAT/xCAT/RemoteShellExp.pm
lissav aa03e2225f fix comments 
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@10801 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
2011-10-17 16:32:11 +00:00

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Perl
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#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
#
package xCAT::RemoteShellExp;
#-----------------------------------------------------------------------------
=head1 RemoteShellExp
Uses perl Expect to set up ssh passwordless login on the input node list
Called from xdsh <nodelist> -K command
It works for node and devices ( such as QLogic Switch).
See man xdsh.
It works for root and non-root userids.
Environment Variables input to drive the setup:
DSH_REMOTE_CMD set to path to remote shell (ssh)
root password must agree on all the nodes
XCAT_ROOT set to root of xCAT install
DSH_REMOTE_PASSWORD - to_user password for -s option required to sendkeys)
Note this is obtained in the xdsh client frontend.
SSH_SETUP_COMMAND - Command to be sent to the IB switch to setup SSH.
DSH_FROM_USERID_HOME - The home directory of the userid from
where the ssh keys will be obtained
to send
DSH_FROM_USERID - The userid from where the ssh keys will be obtained
to send
to the node, or generated and then obtained to send to the
node.
DSH_TO_USERID - The userid on the node where the ssh keys will be updated.
DSH_ENABLE_SSH - Node to node root passwordless ssh will be setup.
Usage: remoteshellexp
[-t node list] test ssh connection to the node
[-k] Generates the ssh keys needed , for the user on the MN.
[-s node list] copies the ssh keys to the nodes
exit 0 - good
exit 1 - abort
exit 2 - usage error
Examples:
$rc=xCAT::RemoteShellExp->remoteshellexp("k",$callback,$remoteshellcmd);
$rc=xCAT::RemoteShellExp->remoteshellexp("s",$callback,$remoteshellcmd,$nodes);
$rc=xCAT::RemoteShellExp->remoteshellexp("t",$callback,$remoteshellcmd,$nodes);
=cut
BEGIN
{
$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
$::XCATDIR = $ENV{'XCATDIR'} ? $ENV{'XCATDIR'} : '/etc/xcat';
}
use lib "$::XCATROOT/lib/perl";
use xCAT::Utils;
use Getopt::Long;
use xCAT::MsgUtils;
use Expect;
use strict;
#-----------------------------------------------------------------------------
sub remoteshellexp
{
my ($class, $flag, $callback, $remoteshell, $nodes) = @_;
my $rc=0;
$::CALLBACK = $callback;
if (!($flag))
{
my $rsp = {};
$rsp->{data}->[0] =
"No flag provide to remoteshellexp.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 2);
return 2;
}
if (($flag ne "k") && ($flag ne "t") && ($flag ne "s")) {
my $rsp = {};
$rsp->{data}->[0] =
"Invalid flag $flag provided.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 2;
}
# for -s flag must have nodes and a $to_userid password
my $to_user_password;
if ($ENV{'DSH_REMOTE_PASSWORD'}) {
$to_user_password=$ENV{'DSH_REMOTE_PASSWORD'};
}
if ($flag eq "s"){
if (!$to_user_password) {
my $rsp = {};
$rsp->{data}->[0] =
"The DSH_REMOTE_PASSWORD environment variable has not been set to the user id password on the node which will have their ssh keys updated (ususally root).";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 2;
}
if (!$nodes) {
my $rsp = {};
$rsp->{data}->[0] =
"No nodes were input to update the user's ssh keys.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 2;
}
}
my $ssh_setup_cmd;
my $from_userid;
my $to_userid;
my $home;
my $remotecopy;
# if caller input a path to ssh remote command, use it
if ($ENV{'DSH_REMOTE_CMD'}) {
$remoteshell=$ENV{'DSH_REMOTE_CMD'};
} else {
if (!$remoteshell) {
$remoteshell="/usr/bin/ssh";
}
}
# figure out path to scp
my ($path,$ssh) = split(/ssh/,$remoteshell);
$remotecopy=$path . "scp";
# if caller input the ssh setup command (such as for IB Switch)
if ($ENV{'SSH_SETUP_COMMAND'}) {
$ssh_setup_cmd=$ENV{'SSH_SETUP_COMMAND'};
}
# set User on the Management node that has the ssh keys
# this id can be a local (non-root) id as well as root
if ($ENV{'DSH_FROM_USERID'}) {
$from_userid=$ENV{'DSH_FROM_USERID'};
} else {
$from_userid="root";
}
# set User on the node where we will send the keys
# this id can be a local id as well as root
if ($ENV{'DSH_TO_USERID'}) {
$to_userid=$ENV{'DSH_TO_USERID'};
} else {
$to_userid="root";
}
# set User home directory to find the ssh public key to send
# For non-root ids information may not be in /etc/passwd
# but elsewhere like LDAP
if ($ENV{'DSH_FROM_USERID_HOME'}) {
$home=$ENV{'DSH_FROM_USERID_HOME'};
} else {
$home=xCAT::Utils->getHomeDir($from_userid);
}
# This indicates we will generate new ssh keys for the user,
# if they are not already there
my $key="$home/.ssh/id_rsa";
my $key2="$home/.ssh/id_rsa.pub";
# Check to see if empty
if (-z $key) {
my $rsp = {};
$rsp->{data}->[0] =
"The $key file is empty. Remove it and rerun the command.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 1;
}
if (-z $key2) {
my $rsp = {};
$rsp->{data}->[0] =
"The $key2 file is empty. Remove it and rerun the command.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 1;
}
if (($flag eq "k") && (!(-e $key)))
{
# if the file size of the id_rsa key is 0, tell them to remove it
# and run the command again
$rc=xCAT::RemoteShellExp->gensshkeys;
}
# send ssh keys to the nodes/devices, to setup passwordless ssh
if ($flag eq "s")
{
if (!($nodes)) {
my $rsp = {};
$rsp->{data}->[0] =
"There are no nodes defined to update the ssh keys.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 1;
}
if ($ssh_setup_cmd) { # setup ssh on devices
$rc=xCAT::RemoteShellExp->senddeviceskeys($remoteshell,$remotecopy,$to_userid,$to_user_password,$home,$ssh_setup_cmd,$nodes);
} else { #setup ssh on nodes
$rc=xCAT::RemoteShellExp->sendnodeskeys($remoteshell,$remotecopy,$to_userid,$to_user_password,$home,$nodes);
}
}
# test ssh setup on the node
if ($flag eq "t")
{
$rc=xCAT::RemoteShellExp->testkeys($remoteshell,$to_userid,$nodes);
}
return $rc;
}
#-----------------------------------------------------------------------------
=head3 gensshkeys
Generates new ssh keys for the input userid on the MN, if they do not
already exist. Test for id_rsa key existence.
=cut
#-----------------------------------------------------------------------------
sub gensshkeys
{
my ($class) = @_;
my $keygen;
my $timeout = 10; # sets Expect default timeout, 0 accepts immediately
my $keygen_sent = 0;
my $prompt1 = 'Generating public/private rsa';
my $prompt2 = 'Enter file.*:';
my $prompt3 = 'Enter passphrase.*:';
my $prompt4 = 'Enter same passphrase.*:';
my $expect_log = undef;
my $debug = 0;
if ($::VERBOSE)
{
$debug = 1;
}
$keygen = new Expect;
# run /usr/bin/ssh-keygen -t rsa
# prompt1 = 'Generating public/private rsa';
# prompt2 = 'Enter file.*:';
# -re "\r"
# prompt3 = 'Enter passphrase.*:';
# -re "\r"
# prompt4 = 'Enter same passphrase.*:';
# -re "\r"
# disable command echoing
#$keygen->slave->stty(qw(sane -echo));
#
# exp_internal(1) sets exp_internal debugging
# to STDERR.
#
#$keygen->exp_internal(1);
$keygen->exp_internal($debug);
#
# log_stdout(0) prevent the program's output from being shown.
# turn on if debugging error
#$keygen->log_stdout(1);
$keygen->log_stdout($debug);
# Run the ssh key gen command
my $spawncmd = "/usr/bin/ssh-keygen -t rsa";
unless ($keygen->spawn($spawncmd))
{
my $rsp = {};
$rsp->{data}->[0] =
"Unable to run $spawncmd.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 1;
}
#
#ssh-keygen prompts starts here
#
my @result = $keygen->expect(
$timeout,
[
$prompt1, # Generating public/private rsa
sub {
$keygen->send("\r");
$keygen->clear_accum();
$keygen->exp_continue();
}
],
[
$prompt2, # Enter file.*:
sub {
$keygen->send("\r");
$keygen->clear_accum();
$keygen->exp_continue();
}
],
[
$prompt3, # Enter passphrase.*
sub {
$keygen->send("\r");
$keygen->clear_accum();
$keygen->exp_continue();
}
],
[
$prompt4, # Enter same passphrase.
sub {
$keygen->send("\r");
$keygen->clear_accum();
$keygen->exp_continue();
}
]
); # end prompts
##########################################
# Expect error - report and quit
##########################################
if (defined($result[1]))
{
my $msg = $result[1];
$keygen->soft_close();
if ($msg =~ /status 0/i) { # no error
return 0;
} else {
my $rsp = {};
$rsp->{data}->[0] = $msg;
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
return 1;
}
} else {
$keygen->soft_close();
return 0;
}
}
#-----------------------------------------------------------------------------
=head3 testkeys
Test to see if the remoteshell setup worked
=cut
#-----------------------------------------------------------------------------
sub testkeys
{
my ($class,$remoteshell,$to_userid,$nodes) = @_;
my $testkeys;
my $timeout = 10; # sets Expect default timeout, 0 accepts immediately
my $testkeys_sent = 0;
my $prompt1 = 'Are you sure you want to continue connecting (yes/no)?';
my $prompt2 = 'ssword:';
my $prompt3 = 'Permission denied*';
my $prompt4 = 'test.success';
my $expect_log = undef;
my $debug = 0;
my $rc=1; # default to error
if ($::VERBOSE)
{
$debug = 1;
}
$testkeys = new Expect;
# run ssh <node> -l to_userid echo test.success
# possible return
# bad
## Are you sure you want to continue connecting (yes/no)?
## *ssword*
## Permission denied.
# Good
## test.success
# disable command echoing
#$testkeys->slave->stty(qw(sane -echo));
#
# exp_internal(1) sets exp_internal debugging
# to STDERR.
#
#$testkeys->exp_internal(1);
$testkeys->exp_internal($debug);
#
# log_stdout(0) prevent the program's output from being shown.
# turn on if debugging error
#$testkeys->log_stdout(1);
$testkeys->log_stdout($debug);
# Run the ssh key gen command
my $spawncmd = "$remoteshell $nodes -l $to_userid echo test.success";
unless ($testkeys->spawn($spawncmd))
{
my $rsp = {};
$rsp->{data}->[0] =
"Unable to run $spawncmd.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
return 1;
}
#
#testkeys prompts starts here
#
my @result = $testkeys->expect(
$timeout,
[
$prompt1, # Are you sure you want to ...
sub {
$rc= 1;
$testkeys->hard_close();
}
],
[
$prompt2, # *ssword*
sub {
$rc= 1;
$testkeys->hard_close();
}
],
[
$prompt3, # Permission denied
sub {
$rc= 1;
$testkeys->hard_close();
}
],
[
$prompt4, # test.success
sub {
$rc= 0;
}
]
); # end prompts
##########################################
# Expect error - report and quit
##########################################
if (defined($result[1]))
{
my $msg = $result[1];
$testkeys->soft_close();
if ($msg =~ /status 0/i) { # no error
return 0;
} else {
my $rsp = {};
$rsp->{data}->[0] = $msg;
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
return 1;
}
} else {
$testkeys->soft_close();
return $rc;
}
}
#-------------------------------------------------------------------------------
=head3 sendnodeskeys
Setup the ssh keys on the nodes
=cut
#-----------------------------------------------------------------------------
sub sendnodeskeys
{
my ($class,$remoteshell,$remotecopy,$to_userid,$to_userpassword,$home,$nodes) = @_;
my $sendkeys;
my $timeout = 10; # sets Expect default timeout, 0 accepts immediately
my $sendkeys_sent = 0;
my $prompt1 = 'Are you sure you want to continue connecting (yes/no)?';
my $prompt2 = 'ssword:';
my $prompt3 = 'Permission denied*';
my $expect_log = undef;
my $debug = 0;
my $rc=0;
if ($::VERBOSE)
{
$debug = 1;
}
# For each node
# make a temporary directory on the node
# run scp <nodename> -l <to user> /bin/mkdir -p /tmp/$to_userid/.ssh
# xdsh has built an authorized_keys file for the node
# in $HOME/.ssh/tmp/authorized_keys
# copy to the node to the temp directory
# scp $HOME/.ssh/tmp/authorized_keys to_userid@<node>:/tmp/$to_userid/.ssh
# If you are going to enable ssh to ssh between nodes, then
# scp $HOME/.ssh/id_rsa to that temp directory on the node
# copy the script $HOME/.ssh/copy.sh to the node, it will do the
# the work of setting up the user's ssh keys and clean up
# ssh (run) copy.sh on the node
my @nodelist=split(/,/,$nodes);
foreach my $node (@nodelist) {
$sendkeys = new Expect;
# disable command echoing
#$sendkeys->slave->stty(qw(sane -echo));
#
# exp_internal(1) sets exp_internal debugging
# to STDERR.
#
#$sendkeys->exp_internal(1);
$sendkeys->exp_internal($debug);
#
# log_stdout(0) prevent the program's output from being shown.
# turn on if debugging error
#$sendkeys->log_stdout(1);
$sendkeys->log_stdout($debug);
# command to make the temp directory on the node
my $spawnmkdir=
"$remoteshell $node -l $to_userid /bin/mkdir -p /tmp/$to_userid/.ssh";
# command to copy the needed files to the node
# send mkdir command
unless ($sendkeys->spawn($spawnmkdir))
{
my $rsp = {};
$rsp->{data}->[0] =
"Unable to run $spawnmkdir.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
next; # go to next node
}
#
#mkdir prompts starts here
#
my @result = $sendkeys->expect(
$timeout,
[
$prompt1, # Are you sure you want to ...
sub {
$sendkeys->send("yes\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt2, # *ssword*
sub {
$sendkeys->send("$to_userpassword\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt3, # Permission denied
sub {
$rc= 1;
$sendkeys->soft_close();
next; # go to next node
}
],
); # end prompts
##########################################
# Expect error - report
##########################################
if (defined($result[1]))
{
my $msg = $result[1];
if ($msg =~ /status 0/i) { # no error
$rc=0;
} else {
my $rsp = {};
$rsp->{data}->[0] = "$node has error,$msg";
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
$rc=1;
next; # go to next node
}
}
$sendkeys->soft_close();
#
#copy files prompts starts here
#
$sendkeys = new Expect;
# disable command echoing
#$sendkeys->slave->stty(qw(sane -echo));
#
# exp_internal(1) sets exp_internal debugging
# to STDERR.
#
#$sendkeys->exp_internal(1);
$sendkeys->exp_internal($debug);
#
# log_stdout(0) prevent the program's output from being shown.
# turn on if debugging error
#$sendkeys->log_stdout(1);
$sendkeys->log_stdout($debug);
my $spawncopyfiles;
if ($ENV{'DSH_ENABLE_SSH'}) { # we will enable node to node ssh
$spawncopyfiles=
"$remotecopy $home/.ssh/id_rsa $home/.ssh/copy.sh $home/.ssh/tmp/authorized_keys $to_userid\@$node:/tmp/$to_userid/.ssh ";
} else { # no node to node ssh ( don't send private key)
$spawncopyfiles=
"$remotecopy $home/.ssh/copy.sh $home/.ssh/tmp/authorized_keys $to_userid\@$node:/tmp/$to_userid/.ssh ";
}
# send copy command
unless ($sendkeys->spawn($spawncopyfiles))
{
my $rsp = {};
$rsp->{data}->[0] =
"Unable to run $spawncopyfiles.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
next; # go to next node
}
my @result = $sendkeys->expect(
$timeout,
[
$prompt1, # Are you sure you want to ...
sub {
$sendkeys->send("yes\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt2, # *ssword*
sub {
$sendkeys->send("$to_userpassword\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt3, # Permission denied
sub {
$rc= 1;
$sendkeys->soft_close();
next; # go to next node
}
],
); # end prompts
##########################################
# Expect error - report
##########################################
if (defined($result[1]))
{
my $msg = $result[1];
if ($msg =~ /status 0/i) { # no error
$rc=0;
} else {
my $rsp = {};
$rsp->{data}->[0] = "$node has error,$msg";
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
$rc=1;
next; # go to next node
}
}
$sendkeys->soft_close();
#
# ssh to the node to run the copy.sh to setup the keys starts here
#
$sendkeys = new Expect;
# disable command echoing
#$sendkeys->slave->stty(qw(sane -echo));
#
# exp_internal(1) sets exp_internal debugging
# to STDERR.
#
#$sendkeys->exp_internal(1);
$sendkeys->exp_internal($debug);
#
# log_stdout(0) prevent the program's output from being shown.
# turn on if debugging error
#$sendkeys->log_stdout(1);
$sendkeys->log_stdout($debug);
# command to run copy.sh
my $spawnruncopy=
"$remoteshell $node -l $to_userid /tmp/$to_userid/.ssh/copy.sh";
# send mkdir command
unless ($sendkeys->spawn($spawnruncopy))
{
my $rsp = {};
$rsp->{data}->[0] =
"Unable to run $spawnruncopy.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
next; # go to next node
}
#
#run copy.sh prompts starts here
#
my @result = $sendkeys->expect(
$timeout,
[
$prompt1, # Are you sure you want to ...
sub {
$sendkeys->send("yes\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt2, # *ssword*
sub {
$sendkeys->send("$to_userpassword\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt3, # Permission denied
sub {
$rc= 1;
$sendkeys->soft_close();
next; # go to next node
}
],
); # end prompts
##########################################
# Expect error - report
##########################################
if (defined($result[1]))
{
my $msg = $result[1];
if ($msg =~ /status 0/i) { # no error
$rc=0;
} else {
my $rsp = {};
$rsp->{data}->[0] = "$node has error,$msg";
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
$rc=1;
next; # go to next node
}
}
$sendkeys->soft_close();
} # end foreach node
return $rc;
}
#-------------------------------------------------------------------------------
=head3 senddeviceskeys
Setup the ssh keys on the nodes
=cut
#-----------------------------------------------------------------------------
sub senddeviceskeys
{
my ($class,$remoteshell,$remotecopy,$to_userid,$to_userpassword,$home,$ssh_setup_cmd,$nodes) = @_;
my $sendkeys;
my $timeout = 10; # sets Expect default timeout, 0 accepts immediately
my $sendkeys_sent = 0;
my $prompt1 = 'Are you sure you want to continue connecting (yes/no)?';
my $prompt2 = 'ssword:';
my $prompt3 = 'Permission denied*';
my $expect_log = undef;
my $debug = 0;
my $rc=0;
if ($::VERBOSE)
{
$debug = 1;
}
# quote the setup command and key "sshKey add \"<key\""
my $setupcmd="\"";
$setupcmd .= $ssh_setup_cmd;
$setupcmd .=" ";
# get the public key
my $key="\\";
$key .="\"";
$key .=`cat $home/.ssh/tmp/authorized_keys `;
chop ($key);
$key .="\\";
$key .="\"";
# add to the command
$setupcmd .=$key;
$setupcmd .="\"";
# For each input device
my @nodelist=split(/,/,$nodes);
foreach my $node (@nodelist) {
#
# ssh to the node to run the copy.sh to setup the keys starts here
#
$sendkeys = new Expect;
# disable command echoing
#$sendkeys->slave->stty(qw(sane -echo));
#
# exp_internal(1) sets exp_internal debugging
# to STDERR.
#
#$sendkeys->exp_internal(1);
$sendkeys->exp_internal($debug);
#
# log_stdout(0) prevent the program's output from being shown.
# turn on if debugging error
#$sendkeys->log_stdout(1);
$sendkeys->log_stdout($debug);
# command to send key to the device
# sshKey add "key"
my $spawnaddkey=
"$remoteshell $node -l $to_userid $setupcmd ";
# send mkdir command
unless ($sendkeys->spawn($spawnaddkey))
{
my $rsp = {};
$rsp->{data}->[0] =
"Unable to run $spawnaddkey.";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK, 1);
next; # go to next node
}
#
#run copy.sh prompts starts here
#
my @result = $sendkeys->expect(
$timeout,
[
$prompt1, # Are you sure you want to ...
sub {
$sendkeys->send("yes\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt2, # *ssword*
sub {
$sendkeys->send("$to_userpassword\r");
$sendkeys->clear_accum();
$sendkeys->exp_continue();
}
],
[
$prompt3, # Permission denied
sub {
$rc= 1;
$sendkeys->soft_close();
next; # go to next node
}
],
); # end prompts
##########################################
# Expect error - report
##########################################
if (defined($result[1]))
{
my $msg = $result[1];
if ($msg =~ /status 0/i) { # no error
$rc=0;
} else {
my $rsp = {};
$rsp->{data}->[0] = "$node has error,$msg";
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
$rc=1;
next; # go to next node
}
}
$sendkeys->soft_close();
} # end foreach node
return $rc;
}
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