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package Sys::Run; |
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{ |
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$Sys::Run::VERSION = '0.16'; |
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} |
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BEGIN { |
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23347
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$Sys::Run::AUTHORITY = 'cpan:TEX'; |
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} |
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# ABSTRACT: Run commands and handle their output. |
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1
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use 5.010_000; |
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1
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47
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1
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1282
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use mro 'c3'; |
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962
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12
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use feature ':5.10'; |
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117
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14
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1
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1
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539
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use Moose; |
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0
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use namespace::autoclean; |
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# use IO::Handle; |
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# use autodie; |
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# use MooseX::Params::Validate; |
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use Carp; |
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use File::Temp qw(); |
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use File::Blarf; |
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use Net::Domain qw(); |
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use Time::HiRes qw(gettimeofday tv_interval); |
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27
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has 'ssh_agent' => ( |
28
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'is' => 'rw', |
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'isa' => 'Bool', |
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'default' => 0, |
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); |
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has 'ssh_hostkey_check' => ( |
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'is' => 'rw', |
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'isa' => 'Bool', |
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'default' => 1, |
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); |
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39
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has 'log_times' => ( |
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'is' => 'rw', |
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'isa' => 'Bool', |
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'default' => 0, |
43
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); |
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45
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with qw(Log::Tree::RequiredLogger); |
46
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47
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sub check_ssh_login { |
48
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my $self = shift; |
49
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my $target = shift; |
50
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my $opts = shift || {}; |
51
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52
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# check if pw-less ssh access works |
53
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if ( $self->run_remote_cmd( $target, '/bin/true', $opts ) ) { |
54
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$self->logger()->log( message => 'Password-less SSH access to '.$target.' is OK', level => 'debug', ); |
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return 1; |
56
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} |
57
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else { |
58
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$self->logger()->log( message => 'Password-less SSH access to '.$target.' does not work. Aborting!', level => 'error', ); |
59
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return; |
60
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} |
61
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} |
62
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63
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sub clear_caches { |
64
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my $self = shift; |
65
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my $opts = shift || {}; |
66
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67
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if( |
68
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$self->run_cmd( 'echo 3 > /proc/sys/vm/drop_caches', $opts ) |
69
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&& |
70
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$self->run_cmd( 'sync', $opts ) |
71
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) { return 1; } |
72
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73
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return; |
74
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} |
75
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76
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sub run_cmd { |
77
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my $self = shift; |
78
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my $cmd = shift; |
79
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my $opts = shift || {}; |
80
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81
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my $outfile; |
82
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my $tempdir; |
83
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if ( $opts->{Logfile} ) { |
84
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$cmd .= ' >>' . $opts->{Logfile} . ' 2>&1'; |
85
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} |
86
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elsif ( $opts->{CaptureOutput} ) { |
87
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if ( $opts->{Outfile} ) { |
88
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if ( $opts->{Append} ) { |
89
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$cmd .= ' >>'.$opts->{Outfile}; |
90
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} else { |
91
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$cmd .= ' >' .$opts->{Outfile}; |
92
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} |
93
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} else { |
94
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# mktemp, redirect to tempfile |
95
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$tempdir = File::Temp::->newdir( CLEANUP => 1, ); |
96
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$outfile = $tempdir . '/cmd.out'; |
97
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$cmd .= ' >'.$outfile; |
98
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} |
99
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# only redirect STDERR if not already redirected |
100
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if($cmd !~ m/\s2>/) { |
101
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$cmd .= ' 2>&1'; |
102
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} |
103
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} |
104
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else { |
105
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if ( !$opts->{Verbose} && $cmd !~ m/>/ ) { |
106
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$cmd .= ' >/dev/null 2>&1'; |
107
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} |
108
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} |
109
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110
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my $msg = 'CMD: '.$cmd; |
111
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$self->logger()->log( message => $msg, level => 'debug', ); |
112
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113
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if ( $opts->{Logfile} ) { |
114
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local $opts->{Append} = 1; |
115
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File::Blarf::blarf( $opts->{Logfile}, time().' - '.$msg . "\n", $opts ); |
116
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} |
117
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118
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my $rv = undef; |
119
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my $timeout = $opts->{Timeout} // 0; |
120
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my $prev_timeout = 0; |
121
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my $t0 = [gettimeofday]; |
122
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eval { |
123
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local $SIG{ALRM} = sub { die "alarm-sys-run-cmd\n"; }; |
124
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$prev_timeout = alarm $timeout if $timeout > 0; |
125
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if( $opts->{DryRun} ) { |
126
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$rv = 0; |
127
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} else { |
128
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$rv = system($cmd) >> 8; |
129
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} |
130
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}; |
131
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alarm $prev_timeout if $timeout > 0; |
132
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if ( $self->log_times() ) { |
133
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my $d0 = tv_interval( $t0 ); |
134
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$self->logger()->log( message => 'CMD ran for '.$d0.'s', level => 'debug', ); |
135
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} |
136
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if ( $@ && $@ eq "alarm-sys-run-cmd\n" ) { |
137
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$rv = 1; |
138
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$self->logger()->log( message => 'CMD timed out after '.$timeout, level => 'warning', ); |
139
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} |
140
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if ( $opts->{Logfile} ) { |
141
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local $opts->{Append} = 1; |
142
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my $output = time().' - CMD finished. Exit Code: '.$rv."\n"; |
143
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if( $opts->{DryRun} ) { |
144
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$output = 'CMD finished in DryRun mode. Faking exit code: 0.'."\n"; |
145
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} |
146
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File::Blarf::blarf( $opts->{Logfile}, $output, $opts ); |
147
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} |
148
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if ( defined($rv) && $rv == 0 ) { |
149
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$self->logger()->log( message => 'Command completed successfully', level => 'debug', ); |
150
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if ( $opts->{CaptureOutput} && !$opts->{Outfile} ) { |
151
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return File::Blarf::slurp( $outfile, $opts ); |
152
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} |
153
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else { |
154
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if ( $opts->{ReturnRV} ) { |
155
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return $rv; |
156
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} |
157
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else { |
158
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return 1; |
159
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} |
160
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} |
161
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} |
162
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else { |
163
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$rv ||= ''; |
164
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$self->logger()->log( message => 'Could not execute '.$cmd.' without error. Exit Code: '.$rv.', Error: ' . $!, level => 'warning', ); |
165
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if ( $opts->{ReturnRV} ) { |
166
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return $rv; |
167
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} |
168
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else { |
169
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return; |
170
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} |
171
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} |
172
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} |
173
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174
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sub run { |
175
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my $self = shift; |
176
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my $host = shift; |
177
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my $cmd = shift; |
178
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my $opts = shift || {}; |
179
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180
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if ( $host eq 'localhost' || $host eq Net::Domain::hostname() || $host eq Net::Domain::hostfqdn() ) { |
181
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return $self->run_cmd( $cmd, $opts ); |
182
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} |
183
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else { |
184
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return $self->run_remote_cmd( $host, $cmd, $opts ); |
185
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} |
186
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} |
187
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188
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sub _ssh_opts { |
189
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my $self = shift; |
190
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my $opts = shift || {}; |
191
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192
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my $ssh_opts = '-oBatchMode=yes '; |
193
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if ( $opts->{NoSSHStrictHostKeyChecking} || !$self->ssh_hostkey_check() ) { |
194
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$ssh_opts .= '-oStrictHostKeyChecking=no '; |
195
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$ssh_opts .= '-oUserKnownHostsFile=/dev/null '; |
196
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} |
197
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if ( $opts->{SSHVerbose} ) { |
198
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$ssh_opts .= q{-v }; |
199
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} else { |
200
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# if we're not supposed to be verbose, we're quiet |
201
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$ssh_opts .= q{-q }; |
202
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} |
203
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# add any extra ssh options, like ports et.al. |
204
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if ( $opts->{SSHOpts} ) { |
205
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$ssh_opts .= $opts->{SSHOpts}.q{ }; |
206
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} |
207
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return $ssh_opts; |
208
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} |
209
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210
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sub run_remote_cmd { |
211
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my $self = shift; |
212
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my $host = shift; |
213
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my $cmd = shift; |
214
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my $opts = shift || {}; |
215
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216
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if ( $opts->{NoHup} ) { |
217
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218
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# run remote cmds in background, this requires nohup |
219
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|
|
$cmd = 'nohup ' . $cmd; |
220
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|
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if ( $cmd !~ m/>/ ) { |
221
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222
|
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|
# redirect output if not already done |
223
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|
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|
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|
|
$cmd .= ' >/dev/null 2>/dev/null'; |
224
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|
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} |
225
|
|
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|
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|
if ( $cmd !~ m/</ ) { |
226
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227
|
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|
# redirect input if not already done |
228
|
|
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|
|
$cmd .= ' </dev/null'; |
229
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} |
230
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$cmd .= ' &'; |
231
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} |
232
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233
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my $rcmd = 'ssh '.$self->_ssh_opts( $opts ).q{ }.$host.q{ '}.$cmd.q{'}; |
234
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235
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# Do not use a forwarded SSH agent unless |
236
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# explicitly asked for. Otherwise a long running operation, e.g. a sync, |
237
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# may be started in a screen w/ the ssh auth of the user. When this users |
238
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# logs off and a new ssh connection is opened it will fail if there |
239
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# is no host key. |
240
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local $ENV{SSH_AGENT_PID} = $ENV{SSH_AGENT_PID}; |
241
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local $ENV{SSH_AUTH_SOCK} = $ENV{SSH_AUTH_SOCK}; |
242
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if ( !$opts->{UseSSHAgent} || !$self->ssh_agent() ) { |
243
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244
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# DGR: already properly localized above |
245
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## no critic (RequireLocalizedPunctuationVars) |
246
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$ENV{SSH_AGENT_PID} = q{}; |
247
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$ENV{SSH_AUTH_SOCK} = q{}; |
248
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## use critic |
249
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} |
250
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$self->logger()->log( message => 'CMD: '.$rcmd, level => 'debug', ); |
251
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my $rv = $self->run_cmd( $rcmd, $opts ); |
252
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253
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# WARNING: $rv IS NOT the OS return code! run_cmd has already |
254
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# interpreted it and changed a OS-return-code of 0 to a true value (1) |
255
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# UNLESS ReturnRV was set! |
256
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# |
257
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# unfortunately ReturnRV changes the semantics of $rv here |
258
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# if ReturnRV is NOT set $rv must have a (perl) true value to indicate |
259
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# success |
260
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# if ReturnRV is set $rv must be exactly zer0 (i.e. a perl false) to indicate |
261
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# sucess, any other value (usually) indicates an error |
262
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if ( ( $opts->{ReturnRV} && defined($rv) && $rv == 0 ) || $rv ) { |
263
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|
$self->logger()->log( message => 'Command successful', level => 'debug', ); |
264
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return $rv; |
265
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} |
266
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|
elsif ( $opts->{Retry} ) { |
267
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|
$self->logger()->log( message => 'Command failed. Retrying.', level => 'notice', ); |
268
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|
my $i = 0; |
269
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|
my $sleep = $opts->{Sleep} || 10; |
270
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|
while ( $i++ < $opts->{Retry} ) { |
271
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|
sleep $sleep; |
272
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|
if ( my $rv_rtr = $self->run_cmd( $rcmd, $opts ) ) { |
273
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|
$self->logger()->log( message => 'Command successful', level => 'debug', ); |
274
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|
return $rv_rtr; |
275
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|
} |
276
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|
|
} |
277
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|
$self->logger()->log( message => 'Command failed. After ' . $opts->{Retry} . ' retries.', level => 'notice', ); |
278
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|
|
if ( $opts->{ReturnRV} ) { |
279
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|
|
return $rv; |
280
|
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|
|
} |
281
|
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|
else { |
282
|
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|
return; |
283
|
|
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|
} |
284
|
|
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|
} |
285
|
|
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|
|
|
else { |
286
|
|
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|
|
|
|
$self->logger()->log( message => 'Command failed. Without retry.', level => 'notice', ); |
287
|
|
|
|
|
|
|
if ( $opts->{ReturnRV} ) { |
288
|
|
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|
|
|
|
return $rv; |
289
|
|
|
|
|
|
|
} |
290
|
|
|
|
|
|
|
else { |
291
|
|
|
|
|
|
|
return; |
292
|
|
|
|
|
|
|
} |
293
|
|
|
|
|
|
|
} |
294
|
|
|
|
|
|
|
} |
295
|
|
|
|
|
|
|
|
296
|
|
|
|
|
|
|
sub check_binary { |
297
|
|
|
|
|
|
|
my $self = shift; |
298
|
|
|
|
|
|
|
my $binary = shift; |
299
|
|
|
|
|
|
|
my $opts = shift || {}; |
300
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
my @path = split /:/, $ENV{PATH}; |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
# add common locations to search path, in case they are missing in PATH |
304
|
|
|
|
|
|
|
push( @path, qw(/sbin /bin /usr/sbin /usr/bin /usr/local/sbin /usr/local/bin) ); |
305
|
|
|
|
|
|
|
foreach my $dir (@path) { |
306
|
|
|
|
|
|
|
my $loc = "$dir/$binary"; |
307
|
|
|
|
|
|
|
if ( -x $loc ) { |
308
|
|
|
|
|
|
|
$self->logger()->log( message => 'Found binary '.$binary.' at '.$loc, level => 'debug', ); |
309
|
|
|
|
|
|
|
return $loc; |
310
|
|
|
|
|
|
|
} |
311
|
|
|
|
|
|
|
} |
312
|
|
|
|
|
|
|
$self->logger()->log( message => 'Binary '.$binary.' not found in path ' . join( ':', @path ), level => 'notice', ); |
313
|
|
|
|
|
|
|
return; |
314
|
|
|
|
|
|
|
} |
315
|
|
|
|
|
|
|
|
316
|
|
|
|
|
|
|
sub check_remote_binary { |
317
|
|
|
|
|
|
|
my $self = shift; |
318
|
|
|
|
|
|
|
my $host = shift; |
319
|
|
|
|
|
|
|
my $binary = shift; |
320
|
|
|
|
|
|
|
my $opts = shift || {}; |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
local $opts->{CaptureOutput} = 1; |
323
|
|
|
|
|
|
|
local $opts->{Retry} = 2; |
324
|
|
|
|
|
|
|
local $opts->{Chomp} = 1; |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
if ( $binary !~ m#^/# ) { |
327
|
|
|
|
|
|
|
$binary = $self->run_remote_cmd( $host, 'which ' . $binary, $opts ); |
328
|
|
|
|
|
|
|
} |
329
|
|
|
|
|
|
|
if ( $binary !~ m#^/# ) { |
330
|
|
|
|
|
|
|
my $msg = 'Command '.$binary.' not found on host '.$host."!\n"; |
331
|
|
|
|
|
|
|
$self->logger()->log( message => $msg, level => 'warning', ); |
332
|
|
|
|
|
|
|
return; |
333
|
|
|
|
|
|
|
} |
334
|
|
|
|
|
|
|
local $opts->{CaptureOutput} = 0; |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
return $self->run_remote_cmd( $host, 'test -x ' . $binary, $opts ); |
337
|
|
|
|
|
|
|
} |
338
|
|
|
|
|
|
|
|
339
|
|
|
|
|
|
|
no Moose; |
340
|
|
|
|
|
|
|
__PACKAGE__->meta->make_immutable; |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
1; |
343
|
|
|
|
|
|
|
|
344
|
|
|
|
|
|
|
__END__ |
345
|
|
|
|
|
|
|
|
346
|
|
|
|
|
|
|
=pod |
347
|
|
|
|
|
|
|
|
348
|
|
|
|
|
|
|
=encoding UTF-8 |
349
|
|
|
|
|
|
|
|
350
|
|
|
|
|
|
|
=head1 NAME |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
Sys::Run - Run commands and handle their output. |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
=head1 SYNOPSIS |
355
|
|
|
|
|
|
|
|
356
|
|
|
|
|
|
|
use Sys::Run; |
357
|
|
|
|
|
|
|
my $Sys = Sys::Run::->new({ |
358
|
|
|
|
|
|
|
'logger' => Log::Tree::->new(), |
359
|
|
|
|
|
|
|
}); |
360
|
|
|
|
|
|
|
my $ok = $Sys->run('sleep 60'); |
361
|
|
|
|
|
|
|
|
362
|
|
|
|
|
|
|
=head1 METHODS |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
=head2 check_ssh_login |
365
|
|
|
|
|
|
|
|
366
|
|
|
|
|
|
|
Make sure an password-less SSH access to the target is working. |
367
|
|
|
|
|
|
|
|
368
|
|
|
|
|
|
|
=head2 clear_caches |
369
|
|
|
|
|
|
|
|
370
|
|
|
|
|
|
|
Clear all OS-level (linux) caches. |
371
|
|
|
|
|
|
|
|
372
|
|
|
|
|
|
|
=head2 run_cmd |
373
|
|
|
|
|
|
|
|
374
|
|
|
|
|
|
|
Run the given command. |
375
|
|
|
|
|
|
|
|
376
|
|
|
|
|
|
|
Available options: |
377
|
|
|
|
|
|
|
- Logfile |
378
|
|
|
|
|
|
|
- CaptureOutput |
379
|
|
|
|
|
|
|
-- Outfile |
380
|
|
|
|
|
|
|
--- Append |
381
|
|
|
|
|
|
|
- Verbose |
382
|
|
|
|
|
|
|
- Timeout |
383
|
|
|
|
|
|
|
- ReturnRV |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
=head2 run |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
Run the given command on the given hostname (maybe localhost). |
388
|
|
|
|
|
|
|
|
389
|
|
|
|
|
|
|
=head2 run_remote_cmd |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
Run the given command on the remote host. |
392
|
|
|
|
|
|
|
|
393
|
|
|
|
|
|
|
Available Options: |
394
|
|
|
|
|
|
|
- NoHup |
395
|
|
|
|
|
|
|
- UseSSHAgent |
396
|
|
|
|
|
|
|
- NoSSHStrictHostKeyChecking |
397
|
|
|
|
|
|
|
- SSHOpts |
398
|
|
|
|
|
|
|
- ReturnRV |
399
|
|
|
|
|
|
|
- Retry |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
=head2 check_binary |
402
|
|
|
|
|
|
|
|
403
|
|
|
|
|
|
|
Make sure the given (unqalified) binary exists somewhere in the search path. |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
=head2 check_remote_binary |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
Make sure the given command is an executeable binary on the remote host. |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
=head1 NAME |
410
|
|
|
|
|
|
|
|
411
|
|
|
|
|
|
|
Sys::Run - Run commands and handle their output. |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
=head1 DESCIRPTION |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
Run commands and handle output. |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
=head1 AUTHOR |
418
|
|
|
|
|
|
|
|
419
|
|
|
|
|
|
|
Dominik Schulz <tex@cpan.org> |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
=head1 COPYRIGHT AND LICENSE |
422
|
|
|
|
|
|
|
|
423
|
|
|
|
|
|
|
This software is copyright (c) 2012 by Dominik Schulz. |
424
|
|
|
|
|
|
|
|
425
|
|
|
|
|
|
|
This is free software; you can redistribute it and/or modify it under |
426
|
|
|
|
|
|
|
the same terms as the Perl 5 programming language system itself. |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
=cut |