[DRBD-user] mysql crashes when I move the datafiles from its current mysql directory to drbd file system

Rabin Yasharzadehe rabin at isoc.org.il
Wed May 14 08:58:08 CEST 2014

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

I don't think it has any thing to do with DRBD,
that probably apparmor fault, you'll need to add the new path to
usr.sbin.mysqld  file which include the new path for mysql db files


On Tue, May 13, 2014 at 2:13 PM, ARUN CHAKRAPANI RAO
<arunrao_erp at yahoo.com>wrote:

> Hi,
> I am new to this drbd configuration concept.
> I am running mysql/drbd on a ubuntu 12.04 64 bit server running on vmware.
> I am trying to move my existing mysql database to drbd file system, which
> is in turn replicating to another node.
> I shut down the db. edited the my.cnf file and updated the datadir to
> datadir                = /var/lib/mysql_drbd
> and
> log_bin                        = /var/lib/mysql_drbd/mysql-bin.log
> I copied all the files under the default mysql directory to this new drbd
> files.
> set the permissions to the new file system to chown mysql:mysql
> /var/lib/mysql_drbd
> started the db using service mysql start. it just crashes. but if I change
> the path to the original location it starts working fine.
> Please do let me know if you have faced similar kind of an issue.
> How to solve this. Is there any parameters which needs to be set in order
> for this db to be working on drbd file systems.
> Any help greatly appreciated.
> Attempting backtrace. You can use the following information to find out
> where mysqld died. If you see no messages after this, something went
> terribly wrong...
> stack_bottom = 0 thread_stack 0x30000
> /usr/sbin/mysqld(my_print_stacktrace+0x29)[0x7f219dfb8989]
> /usr/sbin/mysqld(handle_fatal_signal+0x483)[0x7f219de7dbd3]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0)[0x7f219cbc7cb0]
> /usr/sbin/mysqld(_ZN9MYSQL_LOG17generate_new_nameEPcPKc+0x9b)[0x7f219df1183b]
> /usr/sbin/mysqld(_ZN13MYSQL_BIN_LOG4openEPKc13enum_log_typeS1_10cache_typebmbb+0x204)[0x7f219df15684]
> /usr/sbin/mysqld(+0x285461)[0x7f219dce4461]
> /usr/sbin/mysqld(_Z11mysqld_mainiPPc+0x624)[0x7f219dce7694]
> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7f219c21d76d]
> /usr/sbin/mysqld(+0x27e6d5)[0x7f219dcdd6d5]
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