openstack team mailing list archive

[Sylvain Bauza <sylvain.bauza@xxxxxxxxxxxx>]

When looking at MySQL 5.1 refman 
(http://dev.mysql.com/doc/refman/5.1/en/access-denied.html ), I would 
suggest to follow the procedure :
 1. 'mysqladmin flush-hosts'
 2. replace DNS entries in mysql.user table by IP addresses instead
 3. modify /etc/nova/nova.conf with IP address of HA Mysql instead (and 
restart nova-api !)

I wouldn't bet on it, but I would say this is due to some name 
resolution which is incorrect.

-Sylvain


Le 11/03/2013 17:00, Sylvain Bauza a écrit :
> Ok, lemme try to summarize.
> You do have a DRBD setup for MySQL bound to a VIP 10.21.1.1 thanks to 
> Pacemaker.
> This setup is relying on two hosts, test1 (10.21.0.1) and test2 
> (10.21.0.2).
> Your nova.conf is pointing to mysql://10.21.1.1 which is the VIP.
>
> Are you sure your my.cnf is actually the same in between both DRBD 
> nodes ? (I would recommend to symlink it to a physical file hosted on 
> the DRBD device).
>
> One thing is hurting me : you told me that nova is also pacemake'd. If 
> so, why can I still see my_ip=10.21.0.2 (test2) ? It should be 
> pointing to nova-ha (assuming 10.21.2.4 as per /etc/hosts).
>
> Also, as per my understanding of Pacemaker, DRBD partition is setup by 
> default on test2, correct ?
>
>
> Sorry, as per my first reading, I can't see anything obvious. That 
> said, I'm not sure this is a Nova bug, as the tcpdump trace is seeing 
> a correct MySQL connection attempt. But maybe I'm wrong ?
>
> Anyway, are you sure you only have *one* MySQL engine running (either 
> on test1 or test2) and nova-manage trying to access this right one ?
>
> Perms look good to me. As it a test setup, you could try to unleash 
> the grants by deleting them and allowing nova@'%' to see if it's a 
> basic dns mapping issue.
>
> -Sylvain
>
>
>
> Le 11/03/2013 16:09, Samuel Winchenbach a écrit :
> > I
> > enabled general_log in /etc/mysql/my.cnf  Here are the results of 
> > connecting from "test1", "test2" and using the client:
> > http://paste2.org/p/3115525
> > I purposefully used the real password in case there is a problem with 
> > it.
> >  I changed before submitting post.
> >
> > here is a raw packet TCP dump (tcpdump -w rawdump port 3306) of an 
> > attempted "nova-manage service list" from test1:
> > https://www.dropbox.com/s/u4cjzxv6w6bwwe6/rawdump
> > I looked at it with wireshark and couldn't see anything that jumped 
> > out at me as incorrect.  I have not yet tried to recreate the salted 
> > password.
> >
> >
> > Here is my pacemaker configuration for mysql.  I stripped out 
> > openstack services, rabbitmq and others for clarity.  All resources 
> > are currently disabled (other than MySQL):
> > http://paste2.org/p/3115685
> >
> > Please don't yell at me for having STONITH disabled :P  This is a 
> > testing cluster and I am working on getting routed to the IPMI interface.
> >
> > /etc/hosts:
> > http://paste2.org/p/3115713
> > /etc/nova/nova.conf:
> > http://paste2.org/p/3115739
> >
> > If there is anything else I can provide you, please let me know!  I 
> > have pulled out most of my hair at this point!
> >
> > Sam
> >
> >
> >
> >
> > On Mon, Mar 11, 2013 at 10:11 AM, Sylvain Bauza 
> > <sylvain.bauza@xxxxxxxxxxxx <mailto:sylvain.bauza@xxxxxxxxxxxx>> wrote:
> >
> >     So as to reproduce the nova-manage SQL command, I would recommand
> >     to tcpdump -A port 3306 on the host and get the SQL trace on
> >     what's failing.
> >
> >     Could you please explain further what is your HA config ? Are you
> >     using pacemaker/heartbeat or any VIP ?
> >
> >     -Sylvain
> >
> >     Le 11/03/2013 14:23, Samuel Winchenbach a écrit :
> > >     Does anyone think this could be an openstack bug?  I just want
> > >     to check before submitting a bug report.
> > >
> > >     Sam
> > >
> > >
> > >     On Fri, Mar 8, 2013 at 4:02 PM, Jay Pipes <jaypipes@xxxxxxxxx
> > >     <mailto:jaypipes@xxxxxxxxx>> wrote:
> > >
> > >         Sorry, I really can't think of anything :(
> > >
> > >         On 03/08/2013 03:52 PM, Samuel Winchenbach wrote:
> > >         > I dropped those users and no change.
> > >         >
> > >         > I also set up general logging in mysql but it really
> > >         doesn't provide any
> > >         > additional information.  Any idea for a next step I could
> > >         take?
> > >         >
> > >         > I am almost at the point of taking a tcpdump and trying to
> > >         recreate the
> > >         > salted password.  :/
> > >         >
> > >         > Thanks for the help
> > >         >
> > >         > Sam
> > >         >
> > >         >
> > >         >
> > >         >
> > >         > On Fri, Mar 8, 2013 at 3:38 PM, Jay Pipes
> > >         <jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>
> > >         > <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>>
> > >         wrote:
> > >         >
> > >         >     I'm stumped :( Looks like everything is set up
> > >         correctly to me. What is
> > >         >     interested is that your nova user access works from
> > >         test2, but there is
> > >         >     no nova@test2 user in the mysql.user table. What about
> > >         doing a DROP USER
> > >         >     nova@test1; FLUSH PRIVILEGES; and then see if that
> > >         fixes things... since
> > >         >     the nova@10.21.0.0/255.255.0.0
> > >         <http://nova@10.21.0.0/255.255.0.0>
> > >         <http://nova@10.21.0.0/255.255.0.0>
> > >         >     user is clearly working for the access
> > >         >     from test2.
> > >         >
> > >         >     Also, I'd recommend highly removing the nova@% user.
> > >         >
> > >         >     Best,
> > >         >     -jay
> > >         >
> > >         >     On 03/08/2013 03:09 PM, Samuel Winchenbach wrote:
> > >         >     >
> > >         >     > http://paste2.org/p/3085807
> > >         >     >
> > >         >     >
> > >         >     > On Fri, Mar 8, 2013 at 2:46 PM, Jay Pipes
> > >         <jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>
> > >         >     <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>
> > >         >     > <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx> <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>>>> wrote:
> > >         >     >
> > >         >     >     Please paste the results of SELECT User, Host,
> > >         Password FROM
> > >         >     mysql.user
> > >         >     >     when running as root...
> > >         >     >
> > >         >     >     Thanks!
> > >         >     >     -jay
> > >         >     >
> > >         >     >     On 03/08/2013 02:25 PM, Samuel Winchenbach wrote:
> > >         >     >     > Here are my grants.  I don't know if this
> > >         helps, but I did
> > >         >     verify that
> > >         >     >     > the password was identical for each grant:
> > >         >     > http://paste2.org/p/3085361
> > >         >     >     >
> > >         >     >     >
> > >         >     >     > On Fri, Mar 8, 2013 at 2:17 PM, Samuel Winchenbach
> > >         >     >     <swinchen@xxxxxxxxx <mailto:swinchen@xxxxxxxxx>
> > >         <mailto:swinchen@xxxxxxxxx <mailto:swinchen@xxxxxxxxx>>
> > >         >     <mailto:swinchen@xxxxxxxxx <mailto:swinchen@xxxxxxxxx>
> > >         <mailto:swinchen@xxxxxxxxx <mailto:swinchen@xxxxxxxxx>>>
> > >         >     >     > <mailto:swinchen@xxxxxxxxx
> > >         <mailto:swinchen@xxxxxxxxx> <mailto:swinchen@xxxxxxxxx
> > >         <mailto:swinchen@xxxxxxxxx>>
> > >         >     <mailto:swinchen@xxxxxxxxx <mailto:swinchen@xxxxxxxxx>
> > >         <mailto:swinchen@xxxxxxxxx <mailto:swinchen@xxxxxxxxx>>>>>
> > >         wrote:
> > >         >     >     >
> > >         >     >     > root@test1:/var/log# mysql -hmysql-ha -unova
> > >         >     >     > -p******************************** -e"SELECT
> > >         User, Host,
> > >         >     Password
> > >         >     >     >     FROM mysql.user;"
> > >         >     >     >     ERROR 1142 (42000) at line 1: SELECT
> > >         command denied to user
> > >         >     >     > 'nova'@'test1' for table 'user'
> > >         >     >     >
> > >         >     >     >
> > >         >     >     >     On Fri, Mar 8, 2013 at 2:06 PM, Jay Pipes
> > >         >     <jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>
> > >         <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>
> > >         >     >     <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx> <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>>>
> > >         >     >     > <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx> <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>>
> > >         >     <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>
> > >         <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>>>>
> > >         wrote:
> > >         >     >     >
> > >         >     >     >         What does this show?
> > >         >     >     >
> > >         >     >     >         mysql -hmysql-ha -unova -p<PASS>
> > >         -e"SELECT User, Host,
> > >         >     >     Password FROM
> > >         >     >     > mysql.user"
> > >         >     >     >
> > >         >     >     >         -jay
> > >         >     >     >
> > >         >     >     >         On 03/08/2013 01:46 PM, Samuel
> > >         Winchenbach wrote:
> > >         >     >     >         > Sorry, that must have been a copy
> > >         and paste error.
> > >         >      Here
> > >         >     >     is what I
> > >         >     >     >         > actually ran:
> > >         >     >     >         >
> > >         >     >     >         > http://paste2.org/p/3084996
> > >         >     >     >         >
> > >         >     >     >         >
> > >         >     >     >         > On Fri, Mar 8, 2013 at 12:40 PM, Jay
> > >         Pipes
> > >         >     >     <jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>
> > >         <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>
> > >         >     <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>
> > >         <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>>
> > >         >     >     > <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>
> > >         >     <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>> <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>
> > >         >     <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>>>
> > >         >     >     >         > <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>
> > >         >     <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>> <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>
> > >         >     <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>>
> > >         >     >     <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx> <mailto:jaypipes@xxxxxxxxx
> > >         <mailto:jaypipes@xxxxxxxxx>>
> > >         >     <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>
> > >         <mailto:jaypipes@xxxxxxxxx <mailto:jaypipes@xxxxxxxxx>>>>>>
> > >         wrote:
> > >         >     >     >         >
> > >         >     >     >         > On 03/08/2013 12:19 PM, Samuel
> > >         Winchenbach wrote:
> > >         >     >     >         > > Hi All,
> > >         >     >     >         > >
> > >         >     >     >         > > I have two nodes (test1 and test2)
> > >         that I am
> > >         >     trying to
> > >         >     >     >         set up in a
> > >         >     >     >         > > highly available configuration.
> > >         >     >     >         > >
> > >         >     >     >         > > During the setup process I tried
> > >         running
> > >         >     "nova-manage
> > >         >     >     >         service list" on
> > >         >     >     >         > > both nodes.   It worked fine on
> > >         test2, but
> > >         >     fails on
> > >         >     >     >         test1 even
> > >         >     >     >         > though I
> > >         >     >     >         > > can connect to the database with
> > >         the mysql
> > >         >     client from
> > >         >     >     >         test1.
> > >         >     >     >         > >
> > >         >     >     >         > > Here is a screen capture that
> > >         shows the setup on
> > >         >     >     the two
> > >         >     >     >         nodes are
> > >         >     >     >         > > basically identical:
> > >         > http://paste2.org/p/3084223
> > >         >     >     >         >
> > >         >     >     >         > In the above paste you are doing:
> > >         >     >     >         >
> > >         >     >     >         > mysql -unova -       hmysql-ha -u
> > >          root      nova
> > >         >     >     >         > -p********************************
> > >         >     >     >         >
> > >         >     >     >         > Note you are supplying 2 -u
> > >         arguments, and mysql
> > >         >     >     will take
> > >         >     >     >         the second
> > >         >     >     >         > (root).
> > >         >     >     >         >
> > >         >     >     >         > -jay
> > >         >     >     >         >
> > >         >     >     >         >
> > >         _______________________________________________
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> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>
> > >         >     >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> > >         >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>>
> > >         >     >     > <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> > >         >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>
> > >         >     >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> > >         >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>>>
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> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> > >         >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>
> > >         >     >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> > >         >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>>
> > >         >     >     > <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> > >         >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>
> > >         >     >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>
> > >         >     <mailto:openstack@xxxxxxxxxxxxxxxxxxx
> > >         <mailto:openstack@xxxxxxxxxxxxxxxxxxx>>>>>
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