On 02/03/07 20:37, Josef Karthauser wrote:
Hey guys, does anyone know off the top of their heads why named pipes
don't appear to work across null_fs mounted partitions? i.e. if I have
a named pipe in a file system,
# ls -ld /mysql/mysql.sock
srwxrwxrwx 1 mysql wheel 0 Feb 3 19:01 /mysql/mysql.sock
# mysql --socket=/mysql/mysql.sock
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.0.33-log FreeBSD port: mysql-server-5.0.33
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql>
However if I make this available elsewhere via a null_fs mount:
# mkdir /foo
# mount_nullfs /mysql /foo
# ls -ld /foo/mysql.sock
srwxrwxrwx 1 mysql wheel 0 Feb 3 19:01 /foo/mysql.sock
# mysql --socket=/foo/mysql.sock -p
Enter password:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/foo/mysql.sock' (61)
the socket stops working.
However a hardlink to the socket works:
# umount /foo
# ln /mysql/mysql.sock /foo/mysql.sock
# mysql --socket=/foo/mysql.sock
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.0.33-log FreeBSD port: mysql-server-5.0.33
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
Is this a fundamental design issue with null_fs or a bug?
There appears to be a lot of confusion on the lists about this point
as many people are trying to do this so as to make a single mysql
server available from within a number of jails, for instance. However
people appear to think that this is a limitation of the jail code, not a
limitation of the null_fs code. Having named pipes work in null_fs
filesystems would be a very handy thing indeed.
I'd appreciate any insights into this.
Just wanted to say that it seems like this should work, and I'm not yet
certain why it doesn't. I've looked into it a bit, but my time is very
limited, so I doubt I'll be able to put much more into it..
Eric
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