openstack team mailing list archive

[Samuel Winchenbach <swinchen@xxxxxxxxx>]

For completeness here the routing table, and ip listing for both test1 and
test2.   Doubt this will help much:  http://paste2.org/p/3117125


On Mon, Mar 11, 2013 at 1:52 PM, Samuel Winchenbach <swinchen@xxxxxxxxx>wrote:

> #1 - No change
> #2 - All of grants are in the ip/mask form such as: 'nova'@'
> 10.21.0.0/255.255.0.0'  I have also tried adding 'nova'@'test1' and
> 'nova'@'10.21.0.1'.  No change.
> #3 - I changed the SQL connection string over to IP instead of hostname.
>  No change.  I didn't restart nova-api because it isn't running.   If I
> understand correctly nova-manage communicated directly with the db,
> bypassing nova-api.   This would appear true seeing "nova-manage service
> list" works correctly on test2.
>
>
> :(
>
> Thanks for the help!
> Sam
>
>
> On Mon, Mar 11, 2013 at 12:24 PM, Sylvain Bauza <
> sylvain.bauza@xxxxxxxxxxxx> wrote:
>
>>  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> 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> 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>> 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>
>>>> >     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>>>
>>>> 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>>>> 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>>>> 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>>>>> 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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>>
>>
>>
>