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# -*- cperl -*-
# Copyright (c) 2006, 2021, Oracle and/or its affiliates.
# Use is subject to license terms.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2.0,
# as published by the Free Software Foundation.
#
# This program is also distributed with certain software (including
# but not limited to OpenSSL) that is licensed under separate terms,
# as designated in a particular file or component or in included license
# documentation. The authors of MySQL hereby grant you an additional
# permission to link the program and your derivative works with the
# separately licensed software that they have included with MySQL.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License, version 2.0, for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# This is a library file used by the Perl version of mysql-test-run,
# and is part of the translation of the Bourne shell script with the
# same name.
use strict;
# Private IM-related operations.
sub mtr_im_kill_process ($$$$);
sub mtr_im_load_pids ($);
sub mtr_im_terminate ($);
sub mtr_im_check_alive ($);
sub mtr_im_check_main_alive ($);
sub mtr_im_check_angel_alive ($);
sub mtr_im_check_mysqlds_alive ($);
sub mtr_im_check_mysqld_alive ($);
sub mtr_im_cleanup ($);
sub mtr_im_rm_file ($);
sub mtr_im_errlog ($);
sub mtr_im_kill ($);
sub mtr_im_wait_for_connection ($$$);
sub mtr_im_wait_for_mysqld($$$);
# Public IM-related operations.
sub mtr_im_start ($$);
sub mtr_im_stop ($);
##############################################################################
#
# Private operations.
#
##############################################################################
sub mtr_im_kill_process ($$$$) {
my $pid_lst= shift;
my $signal= shift;
my $total_retries= shift;
my $timeout= shift;
my %pids;
foreach my $pid ( @{$pid_lst} )
{
$pids{$pid}= 1;
}
for ( my $cur_attempt= 1; $cur_attempt <= $total_retries; ++$cur_attempt )
{
foreach my $pid ( keys %pids )
{
mtr_debug("Sending $signal to $pid...");
kill($signal, $pid);
unless ( kill (0, $pid) )
{
mtr_debug("Process $pid died.");
delete $pids{$pid};
}
}
return if scalar keys %pids == 0;
mtr_debug("Sleeping $timeout second(s) waiting for processes to die...");
sleep($timeout);
}
mtr_debug("Process(es) " .
join(' ', keys %pids) .
" is still alive after $total_retries " .
"of sending signal $signal.");
}
###########################################################################
sub mtr_im_load_pids($) {
my $im= shift;
mtr_debug("Loading PID files...");
# Obtain mysqld-process pids.
my $instances = $im->{'instances'};
for ( my $idx= 0; $idx < 2; ++$idx )
{
mtr_debug("IM-guarded mysqld[$idx] PID file: '" .
$instances->[$idx]->{'path_pid'} . "'.");
my $mysqld_pid;
if ( -r $instances->[$idx]->{'path_pid'} )
{
$mysqld_pid= mtr_get_pid_from_file($instances->[$idx]->{'path_pid'});
mtr_debug("IM-guarded mysqld[$idx] PID: $mysqld_pid.");
}
else
{
$mysqld_pid= undef;
mtr_debug("IM-guarded mysqld[$idx]: no PID file.");
}
$instances->[$idx]->{'pid'}= $mysqld_pid;
}
# Re-read Instance Manager PIDs from the file, since during tests Instance
# Manager could have been restarted, so its PIDs could have been changed.
# - IM-main
mtr_debug("IM-main PID file: '$im->{path_pid}'.");
if ( -f $im->{'path_pid'} )
{
$im->{'pid'} =
mtr_get_pid_from_file($im->{'path_pid'});
mtr_debug("IM-main PID: $im->{pid}.");
}
else
{
mtr_debug("IM-main: no PID file.");
$im->{'pid'}= undef;
}
# - IM-angel
mtr_debug("IM-angel PID file: '$im->{path_angel_pid}'.");
if ( -f $im->{'path_angel_pid'} )
{
$im->{'angel_pid'} =
mtr_get_pid_from_file($im->{'path_angel_pid'});
mtr_debug("IM-angel PID: $im->{'angel_pid'}.");
}
else
{
mtr_debug("IM-angel: no PID file.");
$im->{'angel_pid'} = undef;
}
}
###########################################################################
sub mtr_im_terminate($) {
my $im= shift;
# Load pids from pid-files. We should do it first of all, because IM deletes
# them on shutdown.
mtr_im_load_pids($im);
mtr_debug("Shutting Instance Manager down...");
# Ignoring SIGCHLD so that all children could rest in peace.
start_reap_all();
# Send SIGTERM to IM-main.
if ( defined $im->{'pid'} )
{
mtr_debug("IM-main pid: $im->{pid}.");
mtr_debug("Stopping IM-main...");
mtr_im_kill_process([ $im->{'pid'} ], 'TERM', 10, 1);
}
else
{
mtr_debug("IM-main pid: n/a.");
}
# If IM-angel was alive, wait for it to die.
if ( defined $im->{'angel_pid'} )
{
mtr_debug("IM-angel pid: $im->{'angel_pid'}.");
mtr_debug("Waiting for IM-angel to die...");
my $total_attempts= 10;
for ( my $cur_attempt=1; $cur_attempt <= $total_attempts; ++$cur_attempt )
{
unless ( kill (0, $im->{'angel_pid'}) )
{
mtr_debug("IM-angel died.");
last;
}
sleep(1);
}
}
else
{
mtr_debug("IM-angel pid: n/a.");
}
stop_reap_all();
# Re-load PIDs.
mtr_im_load_pids($im);
}
###########################################################################
sub mtr_im_check_alive($) {
my $im= shift;
mtr_debug("Checking whether IM-components are alive...");
return 1 if mtr_im_check_main_alive($im);
return 1 if mtr_im_check_angel_alive($im);
return 1 if mtr_im_check_mysqlds_alive($im);
return 0;
}
###########################################################################
sub mtr_im_check_main_alive($) {
my $im= shift;
# Check that the process, that we know to be IM's, is dead.
if ( defined $im->{'pid'} )
{
if ( kill (0, $im->{'pid'}) )
{
mtr_debug("IM-main (PID: $im->{pid}) is alive.");
return 1;
}
else
{
mtr_debug("IM-main (PID: $im->{pid}) is dead.");
}
}
else
{
mtr_debug("No PID file for IM-main.");
}
# Check that IM does not accept client connections.
if ( mtr_ping_port($im->{'port'}) )
{
mtr_debug("IM-main (port: $im->{port}) " .
"is accepting connections.");
mtr_im_errlog("IM-main is accepting connections on port " .
"$im->{port}, but there is no " .
"process information.");
return 1;
}
else
{
mtr_debug("IM-main (port: $im->{port}) " .
"does not accept connections.");
return 0;
}
}
###########################################################################
sub mtr_im_check_angel_alive($) {
my $im= shift;
# Check that the process, that we know to be the Angel, is dead.
if ( defined $im->{'angel_pid'} )
{
if ( kill (0, $im->{'angel_pid'}) )
{
mtr_debug("IM-angel (PID: $im->{angel_pid}) is alive.");
return 1;
}
else
{
mtr_debug("IM-angel (PID: $im->{angel_pid}) is dead.");
return 0;
}
}
else
{
mtr_debug("No PID file for IM-angel.");
return 0;
}
}
###########################################################################
sub mtr_im_check_mysqlds_alive($) {
my $im= shift;
mtr_debug("Checking for IM-guarded mysqld instances...");
my $instances = $im->{'instances'};
for ( my $idx= 0; $idx < 2; ++$idx )
{
mtr_debug("Checking mysqld[$idx]...");
return 1
if mtr_im_check_mysqld_alive($instances->[$idx]);
}
}
###########################################################################
sub mtr_im_check_mysqld_alive($) {
my $mysqld_instance= shift;
# Check that the process is dead.
if ( defined $mysqld_instance->{'pid'} )
{
if ( kill (0, $mysqld_instance->{'pid'}) )
{
mtr_debug("Mysqld instance (PID: $mysqld_instance->{pid}) is alive.");
return 1;
}
else
{
mtr_debug("Mysqld instance (PID: $mysqld_instance->{pid}) is dead.");
}
}
else
{
mtr_debug("No PID file for mysqld instance.");
}
# Check that mysqld does not accept client connections.
if ( mtr_ping_port($mysqld_instance->{'port'}) )
{
mtr_debug("Mysqld instance (port: $mysqld_instance->{port}) " .
"is accepting connections.");
mtr_im_errlog("Mysqld is accepting connections on port " .
"$mysqld_instance->{port}, but there is no " .
"process information.");
return 1;
}
else
{
mtr_debug("Mysqld instance (port: $mysqld_instance->{port}) " .
"does not accept connections.");
return 0;
}
}
###########################################################################
sub mtr_im_cleanup($) {
my $im= shift;
mtr_im_rm_file($im->{'path_pid'});
mtr_im_rm_file($im->{'path_sock'});
mtr_im_rm_file($im->{'path_angel_pid'});
for ( my $idx= 0; $idx < 2; ++$idx )
{
mtr_im_rm_file($im->{'instances'}->[$idx]->{'path_pid'});
mtr_im_rm_file($im->{'instances'}->[$idx]->{'path_sock'});
}
}
###########################################################################
sub mtr_im_rm_file($)
{
my $file_path= shift;
if ( -f $file_path )
{
mtr_debug("Removing '$file_path'...");
unless ( unlink($file_path) )
{
mtr_warning("Can not remove '$file_path'.")
}
}
else
{
mtr_debug("File '$file_path' does not exist already.");
}
}
###########################################################################
sub mtr_im_errlog($) {
my $msg= shift;
# Complain in error log so that a warning will be shown.
#
# TODO: unless BUG#20761 is fixed, we will print the warning to stdout, so
# that it can be seen on console and does not produce pushbuild error.
# my $errlog= "$opt_vardir/log/mysql-test-run.pl.err";
#
# open (ERRLOG, ">>$errlog") ||
# mtr_error("Can not open error log ($errlog)");
#
# my $ts= localtime();
# print ERRLOG
# "Warning: [$ts] $msg\n";
#
# close ERRLOG;
my $ts= localtime();
print "Warning: [$ts] $msg\n";
}
###########################################################################
sub mtr_im_kill($) {
my $im= shift;
# Re-load PIDs. That can be useful because some processes could have been
# restarted.
mtr_im_load_pids($im);
# Ignoring SIGCHLD so that all children could rest in peace.
start_reap_all();
# Kill IM-angel first of all.
if ( defined $im->{'angel_pid'} )
{
mtr_debug("Killing IM-angel (PID: $im->{angel_pid})...");
mtr_im_kill_process([ $im->{'angel_pid'} ], 'KILL', 10, 1)
}
else
{
mtr_debug("IM-angel is dead.");
}
# Re-load PIDs again.
mtr_im_load_pids($im);
# Kill IM-main.
if ( defined $im->{'pid'} )
{
mtr_debug("Killing IM-main (PID: $im->pid})...");
mtr_im_kill_process([ $im->{'pid'} ], 'KILL', 10, 1);
}
else
{
mtr_debug("IM-main is dead.");
}
# Re-load PIDs again.
mtr_im_load_pids($im);
# Kill guarded mysqld instances.
my @mysqld_pids;
mtr_debug("Collecting PIDs of mysqld instances to kill...");
for ( my $idx= 0; $idx < 2; ++$idx )
{
my $pid= $im->{'instances'}->[$idx]->{'pid'};
unless ( defined $pid )
{
next;
}
mtr_debug(" - IM-guarded mysqld[$idx] PID: $pid.");
push (@mysqld_pids, $pid);
}
if ( scalar @mysqld_pids > 0 )
{
mtr_debug("Killing IM-guarded mysqld instances...");
mtr_im_kill_process(\@mysqld_pids, 'KILL', 10, 1);
}
# That's all.
stop_reap_all();
}
##############################################################################
sub mtr_im_wait_for_connection($$$) {
my $im= shift;
my $total_attempts= shift;
my $connect_timeout= shift;
mtr_debug("Waiting for IM on port $im->{port} " .
"to start accepting connections...");
for ( my $cur_attempt= 1; $cur_attempt <= $total_attempts; ++$cur_attempt )
{
mtr_debug("Trying to connect to IM ($cur_attempt of $total_attempts)...");
if ( mtr_ping_port($im->{'port'}) )
{
mtr_debug("IM is accepting connections " .
"on port $im->{port}.");
return 1;
}
mtr_debug("Sleeping $connect_timeout...");
sleep($connect_timeout);
}
mtr_debug("IM does not accept connections " .
"on port $im->{port} after " .
($total_attempts * $connect_timeout) . " seconds.");
return 0;
}
##############################################################################
sub mtr_im_wait_for_mysqld($$$) {
my $mysqld= shift;
my $total_attempts= shift;
my $connect_timeout= shift;
mtr_debug("Waiting for IM-guarded mysqld on port $mysqld->{port} " .
"to start accepting connections...");
for ( my $cur_attempt= 1; $cur_attempt <= $total_attempts; ++$cur_attempt )
{
mtr_debug("Trying to connect to mysqld " .
"($cur_attempt of $total_attempts)...");
if ( mtr_ping_port($mysqld->{'port'}) )
{
mtr_debug("Mysqld is accepting connections " .
"on port $mysqld->{port}.");
return 1;
}
mtr_debug("Sleeping $connect_timeout...");
sleep($connect_timeout);
}
mtr_debug("Mysqld does not accept connections " .
"on port $mysqld->{port} after " .
($total_attempts * $connect_timeout) . " seconds.");
return 0;
}
##############################################################################
#
# Public operations.
#
##############################################################################
sub mtr_im_start($$) {
my $im = shift;
my $opts = shift;
mtr_debug("Starting Instance Manager...");
my $args;
mtr_init_args(\$args);
mtr_add_arg($args, "--defaults-file=%s", $im->{'defaults_file'});
foreach my $opt ( @{$opts} )
{
mtr_add_arg($args, $opt);
}
$im->{'spawner_pid'} =
mtr_spawn(
$::exe_im, # path to the executable
$args, # cmd-line args
'', # stdin
$im->{'path_log'}, # stdout
$im->{'path_err'}, # stderr
'', # pid file path (not used)
{ append_log_file => 1 } # append log files
);
unless ( $im->{'spawner_pid'} )
{
mtr_error('Could not start Instance Manager.')
}
# Instance Manager can be run in daemon mode. In this case, it creates
# several processes and the parent process, created by mtr_spawn(), exits just
# after start. So, we have to obtain Instance Manager PID from the PID file.
mtr_debug("Waiting for IM to create PID file (" .
"path: '$im->{path_pid}'; " .
"timeout: $im->{start_timeout})...");
unless ( sleep_until_file_created($im->{'path_pid'},
$im->{'start_timeout'},
-1) ) # real PID is still unknown
{
mtr_debug("IM has not created PID file in $im->{start_timeout} secs.");
mtr_debug("Aborting test suite...");
mtr_kill_leftovers();
mtr_report("IM has not created PID file in $im->{start_timeout} secs.");
return 0;
}
$im->{'pid'}= mtr_get_pid_from_file($im->{'path_pid'});
mtr_debug("Instance Manager started. PID: $im->{pid}.");
# Wait until we can connect to IM.
my $IM_CONNECT_TIMEOUT= 30;
unless ( mtr_im_wait_for_connection($im,
$IM_CONNECT_TIMEOUT, 1) )
{
mtr_debug("Can not connect to Instance Manager " .
"in $IM_CONNECT_TIMEOUT seconds after start.");
mtr_debug("Aborting test suite...");
mtr_kill_leftovers();
mtr_report("Can not connect to Instance Manager " .
"in $IM_CONNECT_TIMEOUT seconds after start.");
return 0;
}
# Wait for IM to start guarded instances:
# - wait for PID files;
mtr_debug("Waiting for guarded mysqlds instances to create PID files...");
for ( my $idx= 0; $idx < 2; ++$idx )
{
my $mysqld= $im->{'instances'}->[$idx];
if ( exists $mysqld->{'nonguarded'} )
{
next;
}
mtr_debug("Waiting for mysqld[$idx] to create PID file (" .
"path: '$mysqld->{path_pid}'; " .
"timeout: $mysqld->{start_timeout})...");
unless ( sleep_until_file_created($mysqld->{'path_pid'},
$mysqld->{'start_timeout'},
-1) ) # real PID is still unknown
{
mtr_debug("mysqld[$idx] has not created PID file in " .
"$mysqld->{start_timeout} secs.");
mtr_debug("Aborting test suite...");
mtr_kill_leftovers();
mtr_report("mysqld[$idx] has not created PID file in " .
"$mysqld->{start_timeout} secs.");
return 0;
}
mtr_debug("PID file for mysqld[$idx] ($mysqld->{path_pid} created.");
}
# Wait until we can connect to guarded mysqld-instances
# (in other words -- wait for IM to start guarded instances).
mtr_debug("Waiting for guarded mysqlds to start accepting connections...");
for ( my $idx= 0; $idx < 2; ++$idx )
{
my $mysqld= $im->{'instances'}->[$idx];
if ( exists $mysqld->{'nonguarded'} )
{
next;
}
mtr_debug("Waiting for mysqld[$idx] to accept connection...");
unless ( mtr_im_wait_for_mysqld($mysqld, 30, 1) )
{
mtr_debug("Can not connect to mysqld[$idx] " .
"in $IM_CONNECT_TIMEOUT seconds after start.");
mtr_debug("Aborting test suite...");
mtr_kill_leftovers();
mtr_report("Can not connect to mysqld[$idx] " .
"in $IM_CONNECT_TIMEOUT seconds after start.");
return 0;
}
mtr_debug("mysqld[$idx] started.");
}
mtr_debug("Instance Manager and its components are up and running.");
return 1;
}
##############################################################################
sub mtr_im_stop($) {
my $im= shift;
mtr_debug("Stopping Instance Manager...");
# Try graceful shutdown.
mtr_im_terminate($im);
# Check that all processes died.
unless ( mtr_im_check_alive($im) )
{
mtr_debug("Instance Manager has been stopped successfully.");
mtr_im_cleanup($im);
return 1;
}
# Instance Manager don't want to die. We should kill it.
mtr_im_errlog("Instance Manager did not shutdown gracefully.");
mtr_im_kill($im);
# Check again that all IM-related processes have been killed.
my $im_is_alive= mtr_im_check_alive($im);
mtr_im_cleanup($im);
if ( $im_is_alive )
{
mtr_debug("Can not kill Instance Manager or its children.");
return 0;
}
mtr_debug("Instance Manager has been killed successfully.");
return 1;
}
###########################################################################
1;