11:48 a.m.
Hi at all,
we have a 3 node cluster with this configuration:
ovirtzz 4.1 with 3 node hyperconverged with gluster. 2 node are "full
replicated" and 1 node is the arbiter.
Now we have a new server to add to cluster then we want to add this new
server and remove the arbiter (or, make this new server a "full replicated"
gluster with arbiter role? I don't know)
Can you please help me to know what is the right way to do this? Or, Can
you give me any doc or link that explain the steps to do this?
Thank you in advance!
12:01 p.m.
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On 06/30/2017 02:18 PM, yayo (j) wrote:
Hi at all,
we have a 3 node cluster with this configuration:
ovirtzz 4.1 with 3 node hyperconverged with gluster. 2 node are "full
replicated" and 1 node is the arbiter.
Now we have a new server to add to cluster then we want to add this
new server and remove the arbiter (or, make this new server a "full
replicated" gluster with arbiter role? I don't know)
You do not need to
remove the arbiter node as you are getting the
advantage of saving on space by having this config.
Since you have a new you can add this as fourth node and create another
gluster volume (replica 3) out of this node plus the other two nodes and
run vm images there as well.
Can you please help me to know what is the right way to do this? Or,
Can you give me any doc or link that explain the steps to do this?
Thank you in advance!
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
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<div class="moz-cite-prefix">On 06/30/2017 02:18 PM, yayo (j)
wrote:<br>
</div>
<blockquote
cite="mid:CAGK=3kz4161ynyWCnnr5zLnpFJm8gPkMQhYTqy0vunHJQjOYxQ@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>
<div>Hi at all,</div>
<div><br>
</div>
<div>we have a 3 node cluster with this configuration:</div>
<div><br>
</div>
<div>ovirtzz 4.1 with 3 node hyperconverged with gluster. 2
node are "full replicated" and 1 node is the
arbiter. </div>
<div><br>
</div>
<div>Now we have a new server to add to cluster then we want
to add this new server and remove the arbiter (or, make
this new server a "full replicated" gluster with arbiter
role? I don't know)</div>
</div>
</div>
</div>
</blockquote>
You do not need to remove the arbiter node as you are getting the
advantage of saving on space by having this config. <br>
<br>
Since you have a new you can add this as fourth node and create
another gluster volume (replica 3) out of this node plus the other
two nodes and run vm images there as well.<br>
<blockquote
cite="mid:CAGK=3kz4161ynyWCnnr5zLnpFJm8gPkMQhYTqy0vunHJQjOYxQ@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>
<div><br>
</div>
<div>Can you please help me to know what is the right way to
do this? Or, Can you give me any doc or link that explain
the steps to do this?</div>
<div><br>
</div>
<div>Thank you in advance!</div>
<div><br>
</div>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
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<a class="moz-txt-link-abbreviated"
href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a class="moz-txt-link-freetext"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</pre>
</blockquote>
<p><br>
</p>
</body>
</html>
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1:54 p.m.
2017-06-30 11:01 GMT+02:00 knarra <knarra(a)redhat.com>:
You do not need to remove the arbiter node as you are getting the
advantage of saving on space by having this config.
Since you have a new you can add this as fourth node and create another
gluster volume (replica 3) out of this node plus the other two nodes and
run vm images there as well.
Hi,
And thanks for the answer. The actual arbiter must be removed because is
too obsolete. So, I needs to add the new "full replicated" node but I want
to know what are the steps for add a new "full replicated" node and remove
the arbiter node (Also a way to move the arbiter role to the new node, If
needed) . Extra info: I want to know if I can do this on an existing ovirt
gluster Data Domain (called Data01) because we have many vm runnig on it.
thank you
2:23 p.m.
2017-06-30 12:54 GMT+02:00 yayo (j) <jaganz(a)gmail.com>:
The actual arbiter must be removed because is too obsolete. So, I
needs to
add the new "full replicated" node but I want to know what are the steps
for add a new "full replicated" node and remove the arbiter node (Also a
way to move the arbiter role to the new node, If needed) . Extra info: I
want to know if I can do this on an existing ovirt gluster Data Domain
(called Data01) because we have many vm runnig on it.
Hi,
I have found this doc from RH about replacing host in a gluster env:
https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3/html/Admi...
I can use the command described at point 7 ?
# *gluster volume replace-brick vol sys0.example.com:/rhs/brick1/b1
sys5.example.com:/rhs/brick1/b1 commit force*
*volume replace-brick: success: replace-brick commit successful*
The question is: The replaced node will be a data node (a "full replicated"
node) or will be again an arbiter?
Thank you
3:10 p.m.
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On 06/30/2017 04:53 PM, yayo (j) wrote:
2017-06-30 12:54 GMT+02:00 yayo (j) <jaganz(a)gmail.com
<mailto:jaganz@gmail.com>>:
The actual arbiter must be removed because is too obsolete. So, I
needs to add the new "full replicated" node but I want to know
what are the steps for add a new "full replicated" node and remove
the arbiter node (Also a way to move the arbiter role to the new
node, If needed) . Extra info: I want to know if I can do this on
an existing ovirt gluster Data Domain (called Data01) because we
have many vm runnig on it.
Hi,
I have found this doc from RH about replacing host in a gluster env:
https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3/html/Admi...
I can use the command described at point 7 ?
# *gluster volume replace-brick vol sys0.example.com:/rhs/brick1/b1
sys5.example.com:/rhs/brick1/b1 commit force*
*volume replace-brick: success: replace-brick commit successful*
The question is: The replaced node will be a data node (a "full
replicated" node) or will be again an arbiter?
It will be an arbiter again.
Thank you
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<div class="moz-cite-prefix">On 06/30/2017 04:53 PM, yayo (j)
wrote:<br>
</div>
<blockquote
cite="mid:CAGK=3kxqK1Y5VbrrdYQ-nidMzXXH1cEiQ09_En=Hu4MV=PZhAg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra"><br>
<div class="gmail_quote">2017-06-30 12:54 GMT+02:00 yayo (j)
<span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:jaganz@gmail.com"
target="_blank">jaganz@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div class="gmail_extra">The actual arbiter must be
removed because is too obsolete. So, I needs to add the
new "full replicated" node but I want to know what are
the steps for add a new "full replicated" node and
remove the arbiter node (Also a way to move the arbiter
role to the new node, If needed) . Extra info: I want to
know if I can do this on an existing ovirt gluster Data
Domain (called Data01) because we have many vm runnig on
it.</div>
</blockquote>
</div>
<br>
Hi,</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">I have found this doc from RH about
replacing host in a gluster env: <a moz-do-not-send="true"
href="https://access.redhat.com/documentation/en-US/Red_Hat_Storage/...
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">I can use the command described at
point 7 ? </div>
<br>
<div>
<div class="hljs apache"
style="display:block;overflow-x:auto;padding:0.5em;color:rgb(51,51,51);background:rgb(248,248,248);font-family:monospace">
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">
<div class="gmail_extra"><span
class="hljs-comment"
style="color:rgb(136,136,136)"># <b>gluster volume
replace-brick vol sys0.example.com:/rhs/brick1/b1
sys5.example.com:/rhs/brick1/b1 commit
force</b></span></div>
<div class="gmail_extra"><span
class="hljs-comment"
style="color:rgb(136,136,136)"><b>volume
replace-brick: success: replace-brick commit
successful</b></span></div>
</div>
</div>
</div>
<br>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">The question is: The replaced node will
be a data node (a "full replicated" node) or will be again an
arbiter?</div>
</div>
</blockquote>
It will be an arbiter again. <br>
<blockquote
cite="mid:CAGK=3kxqK1Y5VbrrdYQ-nidMzXXH1cEiQ09_En=Hu4MV=PZhAg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">Thank you</div>
</div>
</blockquote>
<p><br>
</p>
</body>
</html>
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3:09 p.m.
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On 06/30/2017 04:24 PM, yayo (j) wrote:
2017-06-30 11:01 GMT+02:00 knarra <knarra(a)redhat.com
<mailto:knarra@redhat.com>>:
You do not need to remove the arbiter node as you are getting the
advantage of saving on space by having this config.
Since you have a new you can add this as fourth node and create
another gluster volume (replica 3) out of this node plus the other
two nodes and run vm images there as well.
Hi,
And thanks for the answer. The actual arbiter must be removed because
is too obsolete. So, I needs to add the new "full replicated" node but
I want to know what are the steps for add a new "full replicated" node
To
add a fully replicated node you need to reduce the replica count to
2 and add new brick to the volume so that it becomes replica 3. Reducing
replica count by removing a brick from replica / arbiter cannot be done
from UI currently and this has to be done using gluster CLI.
AFAIR, there was an issue where vm's were going to paused state when
reducing the replica count and increasing it to 3. Not sure if this
still holds good with the latest release.
Any specific reason why you want to move to full replication instead of
using an arbiter node ?
and remove the arbiter node (Also a way to move the arbiter role to
the new node, If needed)
To move arbiter role to a new node you can move the node
to maintenance
, add new node and replace old brick with new brick. You can follow
the steps below to do that.
* Move the node to be replaced into Maintenance mode
* Prepare the replacement node
* Prepare bricks on that node.
* Create replacement brick directories
* Ensure the new directories are owned by the vdsm user and the kvm group.
* # mkdir /rhgs/bricks/engine
* # chmod vdsm:kvm /rhgs/bricks/engine
* # mkdir /rhgs/bricks/data
* # chmod vdsm:kvm /rhgs/bricks/data
* Run the following command from one of the healthy cluster members:
* # gluster peer probe <new_node>
* add the new host to the cluster.
* Add new host address to gluster network
* Click Network Interfaces sub-tab.
* Click Set up Host Networks.
* Drag and drop the glusternw network onto the IP address of the new host.
* Click OK
* Replace the old brick with the brick on the new host
* Click the Bricks sub-tab.
* Verify that brick heal completes successfully.
* In the Hosts tab, right-click on the old host and click Remove.
* Clean old host metadata
* # hosted-engine --clean-metadata --host-id=<old_host_id> --force-clean
. Extra info: I want to know if I can do this on an existing ovirt
gluster Data Domain (called Data01) because we have many vm runnig on it.
When you
move your node to maintenance all the vms running on that node
will be migrated to another node and since you have two nodes up and
running there should not be any problem.
thank you
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<div class="moz-cite-prefix">On 06/30/2017 04:24 PM, yayo (j)
wrote:<br>
</div>
<blockquote
cite="mid:CAGK=3ky808BwVy2=sEjA2rR0PZviY0fF9CbfWiWu9o0-U=Z04A@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra"><br>
<div class="gmail_quote">2017-06-30 11:01 GMT+02:00 knarra
<span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:knarra@redhat.com"
target="_blank">knarra@redhat.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">You do not need to remove the
arbiter node as you are getting the advantage of saving
on space by having this config. <br>
<br>
Since you have a new you can add this as fourth node and
create another gluster volume (replica 3) out of this
node plus the other two nodes and run vm images there as
well.</div>
</blockquote>
</div>
</div>
<div class="gmail_extra">
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">Hi,</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">And thanks for the answer. The actual
arbiter must be removed because is too obsolete. So, I needs
to add the new "full replicated" node but I want to know
what are the steps for add a new "full replicated" node
</div>
</div>
</div>
</blockquote>
To add a fully replicated node you need to reduce the replica count
to 2 and add new brick to the volume so that it becomes replica 3.
Reducing replica count by removing a brick from replica / arbiter
cannot be done from UI currently and this has to be done using
gluster CLI. <br>
AFAIR, there was an issue where vm's were going to paused state
when reducing the replica count and increasing it to 3. Not sure if
this still holds good with the latest release. <br>
<br>
Any specific reason why you want to move to full replication instead
of using an arbiter node ?<br>
<br>
<br>
<br>
<blockquote
cite="mid:CAGK=3ky808BwVy2=sEjA2rR0PZviY0fF9CbfWiWu9o0-U=Z04A@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_extra">and remove the arbiter node (Also a
way to move the arbiter role to the new node, If needed) </div>
</div>
</div>
</blockquote>
To move arbiter role to a new node you can move the node to
maintenance , add new node and replace old brick with new brick.
You can follow the steps below to do that.<br>
<br>
<ul>
<li>Move the node to be replaced into Maintenance mode</li>
<li>Prepare the replacement node</li>
<li>Prepare bricks on that node.</li>
<li>Create replacement brick directories</li>
<li>Ensure the new directories are owned by the vdsm user and the
kvm group.</li>
<li># mkdir /rhgs/bricks/engine</li>
<li># chmod vdsm:kvm /rhgs/bricks/engine</li>
<li># mkdir /rhgs/bricks/data</li>
<li># chmod vdsm:kvm /rhgs/bricks/data</li>
<li>Run the following command from one of the healthy cluster
members:</li>
<li># gluster peer probe <new_node></li>
<li> add the new host to the cluster.</li>
<li>Add new host address to gluster network</li>
<li>Click Network Interfaces sub-tab.</li>
<li>Click Set up Host Networks.</li>
<li>Drag and drop the glusternw network onto the IP address of the
new host.</li>
<li>Click OK</li>
<li>Replace the old brick with the brick on the new host</li>
<li>Click the Bricks sub-tab.</li>
<li>Verify that brick heal completes successfully.</li>
<li>In the Hosts tab, right-click on the old host and click
Remove.</li>
<li>Clean old host metadata</li>
<li># hosted-engine --clean-metadata --host-id=<old_host_id>
--force-clean</li>
</ul>
<br>
<br>
<blockquote
cite="mid:CAGK=3ky808BwVy2=sEjA2rR0PZviY0fF9CbfWiWu9o0-U=Z04A@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_extra">. Extra info: I want to know if I can
do this on an existing ovirt gluster Data Domain (called
Data01) because we have many vm runnig on it.</div>
</div>
</div>
</blockquote>
When you move your node to maintenance all the vms running on that
node will be migrated to another node and since you have two nodes
up and running there should not be any problem.<br>
<blockquote
cite="mid:CAGK=3ky808BwVy2=sEjA2rR0PZviY0fF9CbfWiWu9o0-U=Z04A@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">thank you </div>
</div>
</div>
</blockquote>
<br>
</body>
</html>
--------------82E81368194F4601F67DAE1A--
4:23 p.m.
Hi,
And sorry for delay
2017-06-30 14:09 GMT+02:00 knarra <knarra(a)redhat.com>:
To add a fully replicated node you need to reduce the replica count
to 2
and add new brick to the volume so that it becomes replica 3. Reducing
replica count by removing a brick from replica / arbiter cannot be done
from UI currently and this has to be done using gluster CLI.
AFAIR, there was an issue where vm's were going to paused state when
reducing the replica count and increasing it to 3. Not sure if this still
holds good with the latest release.
Any specific reason why you want to move to full replication instead of
using an arbiter node ?
We have a new server with the same hard disk size of other two node, so,
why not? Why join the cluster as an arbiter when we can have the same disk
capacity to add extra replication?
and remove the arbiter node (Also a way to move the arbiter role to the
new node, If needed)
To move arbiter role to a new node you can move the node to maintenance ,
add new node and replace old brick with new brick. You can follow the
steps below to do that.
- Move the node to be replaced into Maintenance mode
- Prepare the replacement node
- Prepare bricks on that node.
- Create replacement brick directories
- Ensure the new directories are owned by the vdsm user and the kvm
group.
- # mkdir /rhgs/bricks/engine
- # chmod vdsm:kvm /rhgs/bricks/engine
- # mkdir /rhgs/bricks/data
- # chmod vdsm:kvm /rhgs/bricks/data
- Run the following command from one of the healthy cluster members:
- # gluster peer probe <new_node>
- add the new host to the cluster.
- Add new host address to gluster network
- Click Network Interfaces sub-tab.
- Click Set up Host Networks.
- Drag and drop the glusternw network onto the IP address of the new
host.
- Click OK
- Replace the old brick with the brick on the new host
- Click the Bricks sub-tab.
- Verify that brick heal completes successfully.
- In the Hosts tab, right-click on the old host and click Remove.
- Clean old host metadata
- # hosted-engine --clean-metadata --host-id=<old_host_id>
--force-clean
I need this (reads: I need the arbiter role) if I reduce replica count then
I add the new node as full replica and increasing replica count again to 3?
(As you expained above)
Thank you
4:28 p.m.
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On 07/03/2017 06:53 PM, yayo (j) wrote:
Hi,
And sorry for delay
2017-06-30 14:09 GMT+02:00 knarra <knarra(a)redhat.com
<mailto:knarra@redhat.com>>:
To add a fully replicated node you need to reduce the replica
count to 2 and add new brick to the volume so that it becomes
replica 3. Reducing replica count by removing a brick from replica
/ arbiter cannot be done from UI currently and this has to be done
using gluster CLI.
AFAIR, there was an issue where vm's were going to paused state
when reducing the replica count and increasing it to 3. Not sure
if this still holds good with the latest release.
Any specific reason why you want to move to full replication
instead of using an arbiter node ?
We have a new server with the same hard disk size of other two node,
so, why not? Why join the cluster as an arbiter when we can have the
same disk capacity to add extra replication?
> and remove the arbiter node (Also a way to move the arbiter role
> to the new node, If needed)
To move arbiter role to a new node you can move the node to
maintenance , add new node and replace old brick with new brick.
You can follow the steps below to do that.
* Move the node to be replaced into Maintenance mode
* Prepare the replacement node
* Prepare bricks on that node.
* Create replacement brick directories
* Ensure the new directories are owned by the vdsm user and the
kvm group.
* # mkdir /rhgs/bricks/engine
* # chmod vdsm:kvm /rhgs/bricks/engine
* # mkdir /rhgs/bricks/data
* # chmod vdsm:kvm /rhgs/bricks/data
* Run the following command from one of the healthy cluster members:
* # gluster peer probe <new_node>
* add the new host to the cluster.
* Add new host address to gluster network
* Click Network Interfaces sub-tab.
* Click Set up Host Networks.
* Drag and drop the glusternw network onto the IP address of the
new host.
* Click OK
* Replace the old brick with the brick on the new host
* Click the Bricks sub-tab.
* Verify that brick heal completes successfully.
* In the Hosts tab, right-click on the old host and click Remove.
* Clean old host metadata
* # hosted-engine --clean-metadata --host-id=<old_host_id>
--force-clean
I need this (reads: I need the arbiter role) if I reduce replica count
then I add the new node as full replica and increasing replica count
again to 3? (As you expained above)
Above steps hold good if you want to move the arbiter role to a new node.
If you want to move to full replica, reducing the replica count will
work fine but increasing it again back to 3 might cause vm pause issues.
Thank you
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<div class="moz-cite-prefix">On 07/03/2017 06:53 PM, yayo (j)
wrote:<br>
</div>
<blockquote
cite="mid:CAGK=3kwU7VbyQjLyvG5TS0LtozOkBpGidOsBYeoyp_eOapTB6g@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">Hi,</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">And sorry for delay</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2017-06-30 14:09 GMT+02:00 knarra
<span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:knarra@redhat.com"
target="_blank">knarra@redhat.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">To <span
class="il">add</span>
a fully replicated <span class="il">node</span>
you
need to reduce the replica count to 2 and <span
class="il">add</span> new brick to the volume so
that
it becomes replica 3. Reducing replica count by removing
a brick from replica / arbiter cannot be done from UI
currently and this has to be done using <span
class="il">gluster</span> CLI. <br>
AFAIR, there was an issue where vm's were going to
paused state when reducing the replica count and
increasing it to 3. Not sure if this still holds good
with the latest release. <br>
<br>
Any specific reason why you want to move to <span
class="il">full</span> replication instead of using
an
arbiter <span class="il">node</span> ?<span
class=""><br>
<br>
</span></div>
</blockquote>
<div><br>
</div>
<div>We have a new server with the same hard disk size of
other two node, so, why not? Why join the cluster as an
arbiter when we can have the same disk capacity to add
extra replication? </div>
<div><br>
</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><span
class=""> <br>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_extra">and remove the arbiter
<span class="il">node</span> (Also a way
to
move the arbiter role to the new <span
class="il">node</span>, If needed)
</div>
</div>
</div>
</blockquote>
</span> To move arbiter role to a new <span
class="il">node</span>
you can move the <span class="il">node</span> to
maintenance , <span class="il">add</span> new
<span
class="il">node</span> and replace old brick with
new
brick. You can follow the steps below to do that.<br>
<br>
<ul>
<li>Move the <span class="il">node</span> to
be
replaced into Maintenance mode</li>
<li>Prepare the replacement <span
class="il">node</span></li>
<li>Prepare bricks on that <span
class="il">node</span>.</li>
<li>Create replacement brick directories</li>
<li>Ensure the new directories are owned by the vdsm
user and the kvm group.</li>
<li># mkdir /rhgs/bricks/engine</li>
<li># chmod vdsm:kvm /rhgs/bricks/engine</li>
<li># mkdir /rhgs/bricks/data</li>
<li># chmod vdsm:kvm /rhgs/bricks/data</li>
<li>Run the following command from one of the healthy
cluster members:</li>
<li># <span class="il">gluster</span> peer
probe
<new_node></li>
<li> <span class="il">add</span> the new
host to the
cluster.</li>
<li><span class="il">Add</span> new host
address to <span
class="il">gluster</span> network</li>
<li>Click Network Interfaces sub-tab.</li>
<li>Click Set up Host Networks.</li>
<li>Drag and drop the glusternw network onto the IP
address of the new host.</li>
<li>Click OK</li>
<li>Replace the old brick with the brick on the new
host</li>
<li>Click the Bricks sub-tab.</li>
<li>Verify that brick heal completes successfully.</li>
<li>In the Hosts tab, right-click on the old host and
click Remove.</li>
<li>Clean old host metadata</li>
<li># hosted-engine --clean-metadata
--host-id=<old_host_id> --force-clean</li>
</ul>
<span class=""> <br>
</span></div>
</blockquote>
<div><br>
</div>
<div>I need this (reads: I need the arbiter role) if I
reduce replica count then I add the new node as full
replica and increasing replica count again to 3? (As you
expained above)</div>
<div><br>
</div>
</div>
</div>
</div>
</blockquote>
Above steps hold good if you want to move the arbiter role to a new
node.<br>
<br>
If you want to move to full replica, reducing the replica count will
work fine but increasing it again back to 3 might cause vm pause
issues.<br>
<br>
<br>
<br>
<br>
<blockquote
cite="mid:CAGK=3kwU7VbyQjLyvG5TS0LtozOkBpGidOsBYeoyp_eOapTB6g@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">
<div>Thank you</div>
</div>
</div>
</div>
</blockquote>
<p><br>
</p>
</body>
</html>
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On 07/03/2017 06:58 PM, knarra wrote:
On 07/03/2017 06:53 PM, yayo (j) wrote:
> Hi,
>
> And sorry for delay
>
> 2017-06-30 14:09 GMT+02:00 knarra <knarra(a)redhat.com
> <mailto:knarra@redhat.com>>:
>
> To add a fully replicated node you need to reduce the replica
> count to 2 and add new brick to the volume so that it becomes
> replica 3. Reducing replica count by removing a brick from
> replica / arbiter cannot be done from UI currently and this has
> to be done using gluster CLI.
> AFAIR, there was an issue where vm's were going to paused state
> when reducing the replica count and increasing it to 3. Not sure
> if this still holds good with the latest release.
>
> Any specific reason why you want to move to full replication
> instead of using an arbiter node ?
>
>
> We have a new server with the same hard disk size of other two node,
> so, why not? Why join the cluster as an arbiter when we can have the
> same disk capacity to add extra replication?
>
>
>> and remove the arbiter node (Also a way to move the arbiter role
>> to the new node, If needed)
> To move arbiter role to a new node you can move the node to
> maintenance , add new node and replace old brick with new
> brick. You can follow the steps below to do that.
>
> * Move the node to be replaced into Maintenance mode
> * Prepare the replacement node
> * Prepare bricks on that node.
> * Create replacement brick directories
> * Ensure the new directories are owned by the vdsm user and the
> kvm group.
> * # mkdir /rhgs/bricks/engine
> * # chmod vdsm:kvm /rhgs/bricks/engine
> * # mkdir /rhgs/bricks/data
> * # chmod vdsm:kvm /rhgs/bricks/data
> * Run the following command from one of the healthy cluster
> members:
> * # gluster peer probe <new_node>
> * add the new host to the cluster.
> * Add new host address to gluster network
> * Click Network Interfaces sub-tab.
> * Click Set up Host Networks.
> * Drag and drop the glusternw network onto the IP address of
> the new host.
> * Click OK
> * Replace the old brick with the brick on the new host
> * Click the Bricks sub-tab.
> * Verify that brick heal completes successfully.
> * In the Hosts tab, right-click on the old host and click Remove.
> * Clean old host metadata
> * # hosted-engine --clean-metadata --host-id=<old_host_id>
> --force-clean
>
>
>
> I need this (reads: I need the arbiter role) if I reduce replica
> count then I add the new node as full replica and increasing replica
> count again to 3? (As you expained above)
>
Above steps hold good if you want to move the arbiter role to a new node.
If you want to move to full replica, reducing the replica count will
work fine but increasing it again back to 3 might cause vm pause issues.
So, please
poweroff your vms while performing this.
> Thank you
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
--------------56CA6FB1F9701F8632DD2EEF
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<head>
<meta content="text/html; charset=windows-1252"
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<div class="moz-cite-prefix">On 07/03/2017 06:58 PM, knarra
wrote:<br>
</div>
<blockquote
cite="mid:12869870-7d3a-1b80-4199-d336dfb8570c@redhat.com"
type="cite">
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
<div class="moz-cite-prefix">On 07/03/2017 06:53 PM, yayo (j)
wrote:<br>
</div>
<blockquote
cite="mid:CAGK=3kwU7VbyQjLyvG5TS0LtozOkBpGidOsBYeoyp_eOapTB6g@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">Hi,</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">And sorry for delay</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2017-06-30 14:09 GMT+02:00 knarra
<span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:knarra@redhat.com"
target="_blank">knarra@redhat.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">To
<span
class="il">add</span> a fully replicated <span
class="il">node</span> you need to reduce the
replica count to 2 and <span
class="il">add</span>
new brick to the volume so that it becomes replica 3.
Reducing replica count by removing a brick from
replica / arbiter cannot be done from UI currently and
this has to be done using <span
class="il">gluster</span>
CLI. <br>
AFAIR, there was an issue where vm's were going to
paused state when reducing the replica count and
increasing it to 3. Not sure if this still holds good
with the latest release. <br>
<br>
Any specific reason why you want to move to <span
class="il">full</span> replication instead of
using
an arbiter <span class="il">node</span> ?<span
class=""><br>
<br>
</span></div>
</blockquote>
<div><br>
</div>
<div>We have a new server with the same hard disk size of
other two node, so, why not? Why join the cluster as an
arbiter when we can have the same disk capacity to add
extra replication? </div>
<div><br>
</div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><span
class=""> <br>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_extra">and remove the
arbiter <span class="il">node</span>
(Also
a way to move the arbiter role to the new <span
class="il">node</span>, If needed)
</div>
</div>
</div>
</blockquote>
</span> To move arbiter role to a new <span
class="il">node</span> you can move the <span
class="il">node</span> to maintenance , <span
class="il">add</span> new <span
class="il">node</span>
and replace old brick with new brick. You can follow
the steps below to do that.<br>
<br>
<ul>
<li>Move the <span class="il">node</span>
to be
replaced into Maintenance mode</li>
<li>Prepare the replacement <span
class="il">node</span></li>
<li>Prepare bricks on that <span
class="il">node</span>.</li>
<li>Create replacement brick directories</li>
<li>Ensure the new directories are owned by the vdsm
user and the kvm group.</li>
<li># mkdir /rhgs/bricks/engine</li>
<li># chmod vdsm:kvm /rhgs/bricks/engine</li>
<li># mkdir /rhgs/bricks/data</li>
<li># chmod vdsm:kvm /rhgs/bricks/data</li>
<li>Run the following command from one of the
healthy cluster members:</li>
<li># <span class="il">gluster</span> peer
probe
<new_node></li>
<li> <span class="il">add</span> the new
host to the
cluster.</li>
<li><span class="il">Add</span> new host
address to
<span class="il">gluster</span>
network</li>
<li>Click Network Interfaces sub-tab.</li>
<li>Click Set up Host Networks.</li>
<li>Drag and drop the glusternw network onto the IP
address of the new host.</li>
<li>Click OK</li>
<li>Replace the old brick with the brick on the new
host</li>
<li>Click the Bricks sub-tab.</li>
<li>Verify that brick heal completes successfully.</li>
<li>In the Hosts tab, right-click on the old host
and click Remove.</li>
<li>Clean old host metadata</li>
<li># hosted-engine --clean-metadata
--host-id=<old_host_id> --force-clean</li>
</ul>
<span class=""> <br>
</span></div>
</blockquote>
<div><br>
</div>
<div>I need this (reads: I need the arbiter role) if I
reduce replica count then I add the new node as full
replica and increasing replica count again to 3? (As you
expained above)</div>
<div><br>
</div>
</div>
</div>
</div>
</blockquote>
Above steps hold good if you want to move the arbiter role to a
new node.<br>
<br>
If you want to move to full replica, reducing the replica count
will work fine but increasing it again back to 3 might cause vm
pause issues.<br>
</blockquote>
So, please poweroff your vms while performing this.<br>
<blockquote
cite="mid:12869870-7d3a-1b80-4199-d336dfb8570c@redhat.com"
type="cite"> <br>
<br>
<br>
<br>
<blockquote
cite="mid:CAGK=3kwU7VbyQjLyvG5TS0LtozOkBpGidOsBYeoyp_eOapTB6g@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">
<div>Thank you</div>
</div>
</div>
</div>
</blockquote>
<p><br>
</p>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated"
href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a class="moz-txt-link-freetext"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</pre>
</blockquote>
<p><br>
</p>
</body>
</html>
--------------56CA6FB1F9701F8632DD2EEF--
2699
days inactive
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days old
9 comments
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knarra -
yayo (j)