Comments on: Chrooting Recent MySQL Versions on Debian and Ubuntu

By: Logesh

Logesh — Tue, 28 Jul 2015 09:22:03 +0000

thanks for the tutorial,it worked for me
As freaker said you do not need the script and an edit of /etc/init.d/mysql
I have one doubt
How to start and stop mysql service from inside the chroot jail
If any one knows please update
Thank u advance and also thanks for the tutorial……

By: Logesh

Logesh — Tue, 28 Jul 2015 09:21:37 +0000

thanks for the tutorial,it worked for me
As freaker said you do not need the script and an edit of /etc/init.d.mysql
I have one doubt
How to start and stop mysql service from inside the chroot jail
If any one knows please update
Thank u advance and also thanks for the tutorial……

By: Nuno Brito

Nuno Brito — Mon, 02 Apr 2012 09:04:15 +0000

Hi,

I confirm that using “/usr/bin/mysqld_safe &” is good enough to start MySQL from a chroot environment under Ubuntu 11.10

No other changes are needed. Just start up your web server and then MySQL to get minimal services running. Good luck and thank you for this tutorial along with helpful comments from other admins.

By: freaker

freaker — Sat, 29 Jan 2011 15:38:48 +0000

thanks for this nice tutorial, it worked fine for me the last years.

the current mysql includes a chroot-function (as of 5.1 at least), so squeeze is much easier to setup the chroot-environment:

you do not need the script any more and also an edit of /etc/init.d/mysql is not necessary any more.

only the changes to /etc/mysql/debian.cnf and /etc/mysql/my.cnf are needed to setup the chroot.

By: Install Linux Ubuntu 10.10 (Maverick) Server Edition with LAMP into an EBS volume (Eucalyptus/UEC) | dodeeric's blog

Wed, 17 Nov 2010 09:37:18 +0000

[…] but for the MySQL DB server, both methods are not working in the “chrooted” environment. I then start it like this /usr/bin/mysqld_safe & You can have a look to solve that problem: Chrooting Recent MySQL Versions on Debian and Ubuntu by Juergen Kreileder. […]

By: Mark

Mark — Wed, 02 Jun 2010 13:29:11 +0000

I have a debian squeeze 64 bit system running, and I need to create a 32 bit chroot to run 32 bit mysql and other apps. I have the chroot working (lenny), but apt-get won’t install mysql in the chroot, and there are no error messages. This recipe copies an existing mysl to the chroot, but I need to create a new 32 bit mysql. Any suggestions or hints would be greatly appreciated!

Thanks!

Mark

By: Jeremy Pastin

Jeremy Pastin — Tue, 09 Mar 2010 04:10:44 +0000

Still works great on Lenny with MySQL 5!!

Thanks for this!!

By: [Sikkerhet & Teknologi] » Tilpasset Debian LiveCD med Installer

[Sikkerhet & Teknologi] » Tilpasset Debian LiveCD med Installer — Sun, 11 Oct 2009 01:59:16 +0000

[…] Årsaken til dette er at scriptet ikke er optimalisert for et chrootet miljø. Jeg fant denne guiden, den virket ikke for meg men gjorde meg i stand til å bedre skjønne prosessen (noe utdatert). For […]

By: Jürgen Kreileder

Jürgen Kreileder — Mon, 25 May 2009 00:16:09 +0000

In reply to airween. Good idea!

By: airween

airween — Sun, 24 May 2009 20:02:32 +0000

Great tutorial – I used it many times.

Just a small reflection: above you have use the ‘ln’ command to create a symlink to pidfle, but many programs searches the socket under /var/run/mysqld. I think the bind mount better than use ‘ln’, just simply put this line to fstab:

/srv/mysql/var/run/mysqld /var/run/mysqld none bind 0 2

Thank you again.

By: Kim Christensen

Kim Christensen — Tue, 30 Sep 2008 19:23:38 +0000

Thanks for the tip on adding “–datadir” to /etc/mysql/debian-start, that solved a non-chroot issue I’ve been having for an hour now.

I would advice to put the “datadir” configuration parameter inside /etc/mysql/debian.cnf instead, thus removing the need of fiddling with init-scripts.

Just my €.02… Thanks for a great blog for us Debian techies ;-)

By: bieniu

bieniu — Tue, 18 Mar 2008 19:30:55 +0000

Hi!
Great HowTo !!
I had a problem with php and mysql.sock i sloved it by adding:

ln -sf $CHROOT_DIR/var/run/mysqld/mysqld.sock /var/run/mysqld
after:
ln -sf $CHROOT_DIR/var/run/mysqld/mysqld.pid /var/run/mysqld

Greets,
Bieniu

By: Dieter

Dieter — Tue, 26 Feb 2008 10:20:36 +0000

I had to add an / to your chrootdir in my.cnf
-> “chroot = /srv/mysql/”

Thanks for your recipe !

Greets,
Dieter

By: B-man

B-man — Fri, 11 Jan 2008 22:35:37 +0000

You da man, Juergen.
Great script + great instruction = no problems.
Working beautifully. Thanks 10^6.

By: Juergen Kreileder

Juergen Kreileder — Sat, 01 Dec 2007 17:51:29 +0000

Thanks Teppo!

Also, I just did a fresh install on Ubuntu Gutsy. It worked fine like described above.

By: Teppo Kauppinen

Teppo Kauppinen — Fri, 26 Oct 2007 10:26:26 +0000

Thanks! Seems to work just fine with Debian Etch 4.0r1! No need to use the fix Ollie had to use.

By: Juergen Kreileder

Juergen Kreileder — Wed, 24 Oct 2007 19:14:43 +0000

Not yet. But stay tuned!

By: stjohn

stjohn — Tue, 23 Oct 2007 11:53:49 +0000

woo-hoo great howto! keep updating it!
have you had a chance to see if its needed in fresh installs?

By: Juergen Kreileder

Juergen Kreileder — Sat, 29 Sep 2007 00:41:13 +0000

ollie fixed his problem by adding '--datadir=<CHROOT_DIR>/var/lib/mysql' to the MYUPGRADE variable in '/etc/mysql/debian-start'. I have to check with a fresh install if this is needed now.

By: funbag

funbag — Tue, 25 Sep 2007 22:46:52 +0000

Hi!

I’m having the same problem as ollie.. I have double checked the ‘–‘ characters and they are correct. I think something else is causing this.

Would really appreciate some help here!

Cheers,
Tom

By: Juergen Kreileder

Juergen Kreileder — Tue, 18 Sep 2007 17:24:41 +0000

Hi ollie, try retyping all the ‘--’ you inserted. It should work then.

There still were some problems with the script text on this page (see the first comment). I hope I’ve fixed all now.
The text on this site contained some − (−) entities, they looked like a normal ‘-‘ signs but it’s quite different for scripts.

By: ollie röschke

ollie röschke — Tue, 18 Sep 2007 11:48:43 +0000

hi hi…

thanks for that great doc, it really helped me out. there seems to be no other usable howto for chrooting mysql on debian on the net…

sadly I have some problems when starting the mysql daemon via the init script. the daemon itself comes up, but the ‘debian-start’ util within the ‘upgrade_system_tables_if_necessary’ function:

/etc/mysql/debian-start[17223]: Can’t find data directory. Please restart with –datadir=path-to-writable-data-dir

I didn’t change the datadir option in ‘/etc/mysql/my.cnf’ and the directory and files in it are writeable to the ‘mysql’ user.

any hints on that problem?
my current version is ‘5.0.32-7etch1’

thanks ollie

By: Juergen Kreileder

Juergen Kreileder — Wed, 18 Apr 2007 20:29:37 +0000

Bummer, i just see copying the ‘−−’ from the article doesn’t work. You have to delete the copied ‘−−’ and type them manually. I’ll correct that tomorrow.