Re: [ovirt-users] HE multipath problem.

[Elad Ben Aharon]

Hi,

Deployment over more than one path is currently not supported. There is a
request for it: https://bugzilla.redhat.com/show_bug.cgi?id=1193961
I can't think of a way for manually change to dual paths and keep the VM
running without interruptions.

Adding Simone and Nir who might have an idea.


On Wed, Feb 3, 2016 at 10:37 AM, gflwqs gflwqs  wrote:

> Hi List,
>
> I have installed the hosted engine over iscsi but have a problem getting
> it to install over the multipath, even though i can see the multipath
> device from the host with multipath -ll.
>
> When i get to the point in the HE installer where i should choose the disk
> i only see the underlying devices like sdb sdc. So if i choose one of those
> it results in that it will only use one of the paths!
>
> My questions is:
> - Is there a bug in the installer script or am i doing something wrong?
> - I now have a running HE and would like to manually change the single
> path to dual, how do i accomplish this?
>
> I am running  ovirt 3.5.6.2.
>
> Regards
> Christian
>
>
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users

Re: [ovirt-users] HE multipath problem.

[Elad Ben Aharon]

The scenario of manually connecting the hosted-engine host to several paths
wasn't tested before, but by theory it should work.
As you said, the host should be set to global maintenance, disconnected
from the single iSCSI session [1] and reconnected to the dual paths [2].
Then host re-activation.

[1]  # iscsiadm -m session -u
 # iscsiadm -m node -o delete
[2] # iscsiadm -m discovery -t sendtargets -p target_IP:port
# iscsiadm -m node target_name -l

On Wed, Feb 3, 2016 at 12:12 PM, gflwqs gflwqs  wrote:

> So does that mean i can change it if i put the HE into global maintenance
> and restart it?
> If that is possible then it is ok for me?
>
> /Christian
>
> 2016-02-03 11:07 GMT+01:00 Elad Ben Aharon :
>
>> Hi,
>>
>> Deployment over more than one path is currently not supported. There is a
>> request for it: https://bugzilla.redhat.com/show_bug.cgi?id=1193961
>> I can't think of a way for manually change to dual paths and keep the VM
>> running without interruptions.
>>
>> Adding Simone and Nir who might have an idea.
>>
>>
>> On Wed, Feb 3, 2016 at 10:37 AM, gflwqs gflwqs  wrote:
>>
>>> Hi List,
>>>
>>> I have installed the hosted engine over iscsi but have a problem getting
>>> it to install over the multipath, even though i can see the multipath
>>> device from the host with multipath -ll.
>>>
>>> When i get to the point in the HE installer where i should choose the
>>> disk i only see the underlying devices like sdb sdc. So if i choose one of
>>> those it results in that it will only use one of the paths!
>>>
>>> My questions is:
>>> - Is there a bug in the installer script or am i doing something wrong?
>>> - I now have a running HE and would like to manually change the single
>>> path to dual, how do i accomplish this?
>>>
>>> I am running  ovirt 3.5.6.2.
>>>
>>> Regards
>>> Christian
>>>
>>>
>>>
>>> ___
>>> Users mailing list
>>> Users@ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>
>
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users

Re: [ovirt-users] HE multipath problem.

[Elad Ben Aharon]

Yes, you're right.

# The following are used only for iSCSI storage
iqn=
portal=
user=
password=
port=


Simone, what do you think, will it be possible to add targets in
hosted-engine.conf as a workaround?


On Wed, Feb 3, 2016 at 2:46 PM, gflwqs gflwqs  wrote:

> Yes but i have to change the config for the HE in
> /etc/ovirt-hosted-engine/hosted-engine.conf so how should that look like?
> There is only one variable for storage and since there is dual pathing
> there is 2 ip:s so is there some other config for multipathing?
>
> storage=x.x.x.x
>
> 2016-02-03 13:17 GMT+01:00 Elad Ben Aharon :
>
>> The scenario of manually connecting the hosted-engine host to several
>> paths wasn't tested before, but by theory it should work.
>> As you said, the host should be set to global maintenance, disconnected
>> from the single iSCSI session [1] and reconnected to the dual paths [2].
>> Then host re-activation.
>>
>> [1]  # iscsiadm -m session -u
>>  # iscsiadm -m node -o delete
>> [2] # iscsiadm -m discovery -t sendtargets -p target_IP:port
>> # iscsiadm -m node target_name -l
>>
>> On Wed, Feb 3, 2016 at 12:12 PM, gflwqs gflwqs  wrote:
>>
>>> So does that mean i can change it if i put the HE into global
>>> maintenance and restart it?
>>> If that is possible then it is ok for me?
>>>
>>> /Christian
>>>
>>> 2016-02-03 11:07 GMT+01:00 Elad Ben Aharon :
>>>
 Hi,

 Deployment over more than one path is currently not supported. There is
 a request for it: https://bugzilla.redhat.com/show_bug.cgi?id=1193961
 I can't think of a way for manually change to dual paths and keep the
 VM running without interruptions.

 Adding Simone and Nir who might have an idea.


 On Wed, Feb 3, 2016 at 10:37 AM, gflwqs gflwqs 
 wrote:

> Hi List,
>
> I have installed the hosted engine over iscsi but have a problem
> getting it to install over the multipath, even though i can see the
> multipath device from the host with multipath -ll.
>
> When i get to the point in the HE installer where i should choose the
> disk i only see the underlying devices like sdb sdc. So if i choose one of
> those it results in that it will only use one of the paths!
>
> My questions is:
> - Is there a bug in the installer script or am i doing something wrong?
> - I now have a running HE and would like to manually change the single
> path to dual, how do i accomplish this?
>
> I am running  ovirt 3.5.6.2.
>
> Regards
> Christian
>
>
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>

>>>
>>
>
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users

Re: [ovirt-users] HE multipath problem.

[gflwqs gflwqs]

Yes but i have to change the config for the HE in
/etc/ovirt-hosted-engine/hosted-engine.conf so how should that look like?
There is only one variable for storage and since there is dual pathing
there is 2 ip:s so is there some other config for multipathing?

storage=x.x.x.x

2016-02-03 13:17 GMT+01:00 Elad Ben Aharon :

> The scenario of manually connecting the hosted-engine host to several
> paths wasn't tested before, but by theory it should work.
> As you said, the host should be set to global maintenance, disconnected
> from the single iSCSI session [1] and reconnected to the dual paths [2].
> Then host re-activation.
>
> [1]  # iscsiadm -m session -u
>  # iscsiadm -m node -o delete
> [2] # iscsiadm -m discovery -t sendtargets -p target_IP:port
> # iscsiadm -m node target_name -l
>
> On Wed, Feb 3, 2016 at 12:12 PM, gflwqs gflwqs  wrote:
>
>> So does that mean i can change it if i put the HE into global maintenance
>> and restart it?
>> If that is possible then it is ok for me?
>>
>> /Christian
>>
>> 2016-02-03 11:07 GMT+01:00 Elad Ben Aharon :
>>
>>> Hi,
>>>
>>> Deployment over more than one path is currently not supported. There is
>>> a request for it: https://bugzilla.redhat.com/show_bug.cgi?id=1193961
>>> I can't think of a way for manually change to dual paths and keep the VM
>>> running without interruptions.
>>>
>>> Adding Simone and Nir who might have an idea.
>>>
>>>
>>> On Wed, Feb 3, 2016 at 10:37 AM, gflwqs gflwqs  wrote:
>>>
 Hi List,

 I have installed the hosted engine over iscsi but have a problem
 getting it to install over the multipath, even though i can see the
 multipath device from the host with multipath -ll.

 When i get to the point in the HE installer where i should choose the
 disk i only see the underlying devices like sdb sdc. So if i choose one of
 those it results in that it will only use one of the paths!

 My questions is:
 - Is there a bug in the installer script or am i doing something wrong?
 - I now have a running HE and would like to manually change the single
 path to dual, how do i accomplish this?

 I am running  ovirt 3.5.6.2.

 Regards
 Christian



 ___
 Users mailing list
 Users@ovirt.org
 http://lists.ovirt.org/mailman/listinfo/users


>>>
>>
>
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users

Re: [ovirt-users] HE multipath problem.

[gflwqs gflwqs]

So does that mean i can change it if i put the HE into global maintenance
and restart it?
If that is possible then it is ok for me?

/Christian

2016-02-03 11:07 GMT+01:00 Elad Ben Aharon :

> Hi,
>
> Deployment over more than one path is currently not supported. There is a
> request for it: https://bugzilla.redhat.com/show_bug.cgi?id=1193961
> I can't think of a way for manually change to dual paths and keep the VM
> running without interruptions.
>
> Adding Simone and Nir who might have an idea.
>
>
> On Wed, Feb 3, 2016 at 10:37 AM, gflwqs gflwqs  wrote:
>
>> Hi List,
>>
>> I have installed the hosted engine over iscsi but have a problem getting
>> it to install over the multipath, even though i can see the multipath
>> device from the host with multipath -ll.
>>
>> When i get to the point in the HE installer where i should choose the
>> disk i only see the underlying devices like sdb sdc. So if i choose one of
>> those it results in that it will only use one of the paths!
>>
>> My questions is:
>> - Is there a bug in the installer script or am i doing something wrong?
>> - I now have a running HE and would like to manually change the single
>> path to dual, how do i accomplish this?
>>
>> I am running  ovirt 3.5.6.2.
>>
>> Regards
>> Christian
>>
>>
>>
>> ___
>> Users mailing list
>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users

Re: [ovirt-users] HE multipath problem.

[Simone Tiraboschi]

On Wed, Feb 3, 2016 at 1:54 PM, Elad Ben Aharon  wrote:

> Yes, you're right.
>
> # The following are used only for iSCSI storage
> iqn=
> portal=
> user=
> password=
> port=
>
>
> Simone, what do you think, will it be possible to add targets in
> hosted-engine.conf as a workaround?
>

I don't see any possible workaround here. We need to implement something in
ovrt-ha-agent for that, it's an RFE for 4.0, let's see if we can get it
back to 3.6.z


>
>
> On Wed, Feb 3, 2016 at 2:46 PM, gflwqs gflwqs  wrote:
>
>> Yes but i have to change the config for the HE in
>> /etc/ovirt-hosted-engine/hosted-engine.conf so how should that look like?
>> There is only one variable for storage and since there is dual pathing
>> there is 2 ip:s so is there some other config for multipathing?
>>
>> storage=x.x.x.x
>>
>> 2016-02-03 13:17 GMT+01:00 Elad Ben Aharon :
>>
>>> The scenario of manually connecting the hosted-engine host to several
>>> paths wasn't tested before, but by theory it should work.
>>> As you said, the host should be set to global maintenance, disconnected
>>> from the single iSCSI session [1] and reconnected to the dual paths [2].
>>> Then host re-activation.
>>>
>>> [1]  # iscsiadm -m session -u
>>>  # iscsiadm -m node -o delete
>>> [2] # iscsiadm -m discovery -t sendtargets -p target_IP:port
>>> # iscsiadm -m node target_name -l
>>>
>>> On Wed, Feb 3, 2016 at 12:12 PM, gflwqs gflwqs  wrote:
>>>
 So does that mean i can change it if i put the HE into global
 maintenance and restart it?
 If that is possible then it is ok for me?

 /Christian

 2016-02-03 11:07 GMT+01:00 Elad Ben Aharon :

> Hi,
>
> Deployment over more than one path is currently not supported. There
> is a request for it:
> https://bugzilla.redhat.com/show_bug.cgi?id=1193961
> I can't think of a way for manually change to dual paths and keep the
> VM running without interruptions.
>
> Adding Simone and Nir who might have an idea.
>
>
> On Wed, Feb 3, 2016 at 10:37 AM, gflwqs gflwqs 
> wrote:
>
>> Hi List,
>>
>> I have installed the hosted engine over iscsi but have a problem
>> getting it to install over the multipath, even though i can see the
>> multipath device from the host with multipath -ll.
>>
>> When i get to the point in the HE installer where i should choose the
>> disk i only see the underlying devices like sdb sdc. So if i choose one 
>> of
>> those it results in that it will only use one of the paths!
>>
>> My questions is:
>> - Is there a bug in the installer script or am i doing something
>> wrong?
>> - I now have a running HE and would like to manually change the
>> single path to dual, how do i accomplish this?
>>
>> I am running  ovirt 3.5.6.2.
>>
>> Regards
>> Christian
>>
>>
>>
>> ___
>> Users mailing list
>> Users@ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>

>>>
>>
>
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users