>Description:
mysql command line client seems to favor local sockets for
connections, even when -P or --port are used.
I wish to have mysql connections tunneled through ssh. This is
complicated by the fact that I'm running mysqld on the remote host
and the local host.
For those new to ssh tunneling, ssh can listen on a socket on the local
host to forward connections through the ssh connection. The remote
host (involved in the ssh connection) will then connect to the redirect
host. The following command is used to forward a connections to port
3307 on the local host to a remote host running mysql. For simplicity,
the database server and the ssh server are the same host. They need not
be.
ssh -L3307:dbhost:3306 user@dbhost
At this point a mysql client command like
mysql -P 3307 -u user -p
should connect to port 3307 on the local host. If mysql is
running, mysql will always connect using mysql.sock.
If mysql is not running, the connection works as desired.
I've found no work around, but using an alternate local socket
comes to mind. This would provide an inconvenience to the user
as it would be necessary to always specify the socket on the mysql
command line (is there another way to specify that is compatible with
this?).
What would be nice is either of
o -P or --port take preference over the local socket. To avoid
confusion if either port parameter is chosen, the socket should not
be used at all (imagine dev, test, prod, and connecting to the
wrong db by accident).
o Have an option on mysql to deactivate the use of the local socket
(seems less elegant then above).
BTW: Great product. I love the package!
Oh, this is output from the mysqlbug program. I ran it on the mysql
local host from this description. My mail server is elsewhere, so
I cut/pasted this into an email and sent to (what appeared to me to be)
the correct address.
>How-To-Repeat:
Unfortunately there is not a one line reproduction here, but it
is rather simple:
Prerequisites:
mysqld running on localhost and on a remote host. Remote host
must run sshd, and user must have a local account.
Reproduction
From the local host
ssh -L3307:remote.host:3306 [EMAIL PROTECTED]
From the local host
mysql --port=3307 -u dbuser -p
In this case you'll either be connected to the local database (if the
user and password are valid), or you'll be denied a connection.
Shut down mysql locally
Run the above mysql command again.
You'll be connected to the mysql instance on the remote host.
>Fix:
Unknown. I'm proposing a change to the behavior of mysql.
>Submitter-Id:
>Originator: Andrew Libby ([EMAIL PROTECTED])
>Organization: CommNav, Inc.
>MySQL support: none
>Synopsis: mysql command line client seems to favor local sockets over port
>Severity: non-critical
>Priority: medium
>Category: mysql
>Class: sw-bug
>Release: mysql-3.23.36 (Linux-Mandrake MySQL RPM)
>Environment:
<machine, os, target, libraries (multiple lines)>
System: Linux mp3.dev.commnav.com 2.4.3-20mdk #1 Sun Apr 15 23:03:10 CEST 2001 i686
unknown
Architecture: i686
Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gmake /usr/bin/gcc /usr/bin/cc
GCC: Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux/2.96/specs
gcc version 2.96 20000731 (Linux-Mandrake 8.0 2.96-0.48mdk)
Compilation info: CC='gcc' CFLAGS='-O3 -fomit-frame-pointer -pipe -mcpu=pentiumpro
-march=i586 -ffast-math -fno-omit-frame-pointer' CXX='g++' CXXFLAGS='-O3
-fomit-frame-pointer -pipe -mcpu=pentiumpro -march=i586 -ffast-math
-fno-omit-frame-pointer' LDFLAGS=''
LIBC:
lrwxrwxrwx 1 root root 13 Aug 17 2001 /lib/libc.so.6 -> libc-2.2.2.so
-rwxr-xr-x 1 root root 1216268 Feb 21 2001 /lib/libc-2.2.2.so
-rw-r--r-- 1 root root 26366908 Feb 21 2001 /usr/lib/libc.a
-rw-r--r-- 1 root root 178 Feb 21 2001 /usr/lib/libc.so
Configure command: ./configure --enable-shared --enable-thread-safe-client
--enable-assembler --with-mysqld-user=mysql
--with-unix-socket-path=/var/lib/mysql/mysql.sock --prefix=/
--with-extra-charsets=complex --exec-prefix=/usr --libexecdir=/usr/sbin
--sysconfdir=/etc --datadir=/usr/share --localstatedir=/var/lib/mysql
--infodir=/usr/share/info --includedir=/usr/include --mandir=/usr/share/man
--with-berkeley-db --without-innobase '--with-comment=Linux-Mandrake MySQL RPM'
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