If a slave dies, is there any way to determine that state from an external point of view (ie: via Perl/DBD) so we can write a script of some kind to either connect to the slave and issue a "START SLAVE" or send the last xx lines of the .err log file to our tech staff?
I tried writing a Perl script to run a query of "SHOW SLAVE STATUS" and parsing the 30-or-so fields that would otherwise return, but it's complaining:
DBD::mysql::st execute failed: Access denied; you need the SUPER,REPLICATION CLIENT privilege for this operation at ./checkslave.pl line 19.
Snippet of code:
my $dbh_2 = DBI->connect("dbi:mysql:ouofa:slave2.domain.org","systemcheck","mypasswd",
{ RaiseError => 1, AutoCommit => 0, PrintError => 0 } ) or die ("SLAVE2 MySQL database offline: $!") ;
my $cur_info = $dbh_2->prepare("SHOW SLAVE STATUS") ;
$cur_info->execute() ;
my @row = $cur_info->fetchrow_array() ;... line 19 would be the ->execute() call.
I did this:
GRANT SUPER,REPLICATION CLIENT to 'syscheck'@'mywebserver.domain.org' IDENTIFIED BY 'mypasswd' ;
... on the slaves, but that didn't help me any.
How can I check a slave's status without having to manually log in to a mysql client??
-id
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