[one-users] Users Digest, Vol 54, Issue 66
Patrick Petit
patrick.michel.petit at gmail.com
Fri Aug 24 00:35:50 PDT 2012
Sacs
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From: users-request at lists.opennebula.org
Sender: users-bounces at lists.opennebula.orgDate: Wed, 22 Aug 2012 03:57:06
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Subject: Users Digest, Vol 54, Issue 66
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Today's Topics:
1. Re: noVNC Error - unable to establish VNC connection
(Carlos Jim?nez)
2. Quota system in 3.6 (Nicolas AGIUS)
3. Re: How-to set RAM on Running KVM VM in CentOS 6.2x86 +
openNebula v3.6 (Andr? Monteiro)
4. Re: How-to set RAM on Running KVM VM in CentOS 6.2x86 +
openNebula v3.6 (Ruben S. Montero)
----------------------------------------------------------------------
Message: 1
Date: Wed, 22 Aug 2012 10:28:31 +0200
From: Carlos Jim?nez <cjimenez at eneotecnologia.com>
To: Hector Sanjuan <hsanjuan at opennebula.org>
Cc: users at lists.opennebula.org
Subject: Re: [one-users] noVNC Error - unable to establish VNC
connection
Message-ID: <5034982F.1060805 at eneotecnologia.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Hector,
You were right. It was the firewall on Host1 (iptables) configured to
accept only by default incoming ICMP and SSH traffic. I thought I had
configured iptables on both hosts but I just did it on Host2.
Now, I clic VNC icon on Sunstone web and it successfully connects to the VM.
Thank you very much.
Carlos.
On 08/21/2012 04:10 PM, Hector Sanjuan wrote:
> Hello,
>
>> Then, I try to establish a VNC connection from my PC using a VNC
>> client (vinagre)..
>> 1: 192.168.101.119: ignoring socket not ready
>>
>> ...
>> 2: 127.0.0.1: ignoring socket not ready
>>
>> The same test but using Firefox from my computer:
>> 3: 192.168.101.119: Normal web request received but disallowed
>
> This is because you are connecting to websockify with a normal VNC
> client, not with a websockets client as expected. You can try to see
> if you can use vinagre to connect directly to Host1:5905 in first
> place, to assure that the VM VNC is responding.
>
> The error below is the relevant one:
>
>> 4: connecting to: Host1:5905
>> 4: handler exception: [Errno 113] No route to host
>>
>
> Do you have a firewall or some other mechanism that might prevent that
> Host1 is reachable from the frontend? Perhaps you can try launching
> websockify with Host1 IP directly, to see if its a name resolve issue
> in the end...
>
------------------------------
Message: 2
Date: Wed, 22 Aug 2012 09:39:04 +0100 (BST)
From: Nicolas AGIUS <nicolas.agius at lps-it.fr>
To: users at lists.opennebula.org
Subject: [one-users] Quota system in 3.6
Message-ID:
<1345624744.90974.YahooMailClassic at web171201.mail.ir2.yahoo.com>
Content-Type: text/plain; charset="utf-8"
Hi,
I've upgraded to 3.6 and I'm tring to use the new quota system.
It seems that the file quota.conf is no more used.
How can I set defaults quotas for all users ?
Thanks,
Nicolas AGIUS
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Message: 3
Date: Wed, 22 Aug 2012 10:06:05 +0100
From: Andr? Monteiro <andre.monteir at gmail.com>
To: users <Users at lists.opennebula.org>
Subject: Re: [one-users] How-to set RAM on Running KVM VM in CentOS
6.2x86 + openNebula v3.6
Message-ID:
<CAG+nK=rh8NomtPtJV6RROvZDw638QgumaobGGY+nOiGKoLZP0Q at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hello,
There is a more pratical and fast way:
- open virt-manager and click for VM details
- shutdown VM on OpenNebula
- change RAM and CPU on virt-manager, it will update libvirt xml correctly
- restart machine on OpenNebula
The only catch is that OpenNebula doesn't know about this change and can
overcommit resources.
--
Andr? Monteiro
On Wed, Aug 22, 2012 at 8:17 AM, cloud.b.lab <cloud.b.lab at zoho.com> wrote:
> **
> Junix,
>
> *There is an indirect method*, *but I do not recommend that as it will
> send wrong and incorrect signals to OpenNebula Monitoring program and if
> you do not have fast hands, your VM will end up in "unkn" state.*
>
> Again I am saying I it is not a recommend practice and you don't try it
> in a non test environment.
>
>
> If you would like to try it for information purpose , do the following:
>
> 1. Create a test vm and login.
> e.g. 153 oneadmin oneadmin centos63 runn 10 *1024M* onehost
> 0d 00h12
>
> 2. Verify the total memory using "free" command
>
> 3. Go to the machine running libvirt [means your OpenNebula Node]
>
> 4. Get the doamin ID using virsh list
>
> 5. Get a xmldump of running domain virsh dumpxml <Domain-ID>
> <file-name>
> e.g. virsh dumpxml 7 > /var/lib/one/template/one-149
>
> 6. Open the XML and change the memory values, Save. Assume currently it
> is 1048576.
> <memory>2095104</memory>
> <currentMemory>2095104</currentMemory>
>
> 7. Destroy the running domain virsh destroy 6
>
> 8. List all doamins in Shut-off state virsh list --all
>
> 9. If it is there in shut-off state, undefine it virsh undefine
> <DOAMIn-NAME>
> e.g. virsh undefine one-149
>
> 10. Recreate the doamin using the XML
> e.g. virsh create /var/lib/one/template/one-149
>
> 11. Connect through VNC , login as root and check with "free". You will
> see a higher MEM value
>
> 11. Give onevm top ,Wait for some time: OpenNebula reports the following.
>
> 153 oneadmin oneadmin centos63 runn 5 *2G* onehost 0d
> 00h24
>
>
> Thanks and regards,
> Anil Kumar
>
>
>
> ---- On Tue, 21 Aug 2012 22:38:39 -0700 *cloud.b.lab<cloud.b.lab at zoho.com>
> * wrote ----
>
> As per my limited understanding:
>
> The RAM size you specify in the VM template using "MEMORY=xxxx"
> translates to "Maximum available memory" for an active domain.
> Hence, while the domain being active , I think one cannot go beyond the
> available/max mem.
>
> If you edit the XML file through libvirt and force change the Maximum
> memory value to anything higher, you may end up in Kernel Panic situation.
>
> If you would like to try it , do the following:
> 1. Create a test vm
> 2. Verify the total memory using "free" command
> 3. Go to the machine running libvirt
> 4. Get the doamin ID using virsh list
> 5. Save the current state of doamin using virsh save <Doamin_ID>
> <Filename-with-domain-name>
> (so that you have a copy of it)
> 6. Restore the doamin using virsh
> <Filename-with-domain-name>
> 5. Edit the doamin XML using virsh edit
> <DOMAIN_ID>
> 6. Try to change values for <memory> and <currentMemory> tags to a higher
> value divisible by 1024.
> Assume current <memory> is 1048576.
> e.g.
> <memory>2095104</memory>
> <currentMemory>2095104</currentMemory>
> 7. Try to reboot the doamin virsh reboot
> <DOAMIn-ID>
> 8. Check available memory using "free"
> 9. Try issue setmaxmem command to increase memory to 2095104 virsh
> setmaxmem <DOAMIn-ID> 2095104
>
> oneadmin at onehost:~$ virsh setmaxmem 4 2095104
> error: Unable to change MaxMemorySize
> error: Requested operation is not valid: cannot resize the maximum memory
> on an active domain
> 10. Try to increase available memory
> oneadmin at onehost:~$ virsh setmem 4 2095104
> error: Requested memory size 2095104 kb is larger than maximum of 1048576
> kb
>
> Hope this helps.....
>
> Regards,
> Anil.
>
>
>
> ---- On Tue, 21 Aug 2012 10:42:41 -0700 *Lawrence Chiong<junix88 at gmail.com
> >* wrote ----
>
> Hello,
>
> Can anyone guide me a step-by-step guide on HOWTO change/update RAM on a
> fly / running VM (KVM). Because I tried changing my VM template (in
> sunstone) its Memory (e.g. from 2048M to 4096M) and then reboot my KVM VM
> but changes made doesn't take effect. So I tried manually changed the
> .../deployment.0 file and update the Memory element and update also the
> vm_pool table on body field +Memory element to 4096M then I restarted
> "oned" + "sunstone" so with mysqld BUT still the memory being updated
> doesn't changed.
>
> Any help is very much appreciated.
>
> Thank you.
>
> Junix
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
>
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
>
>
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
>
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------------------------------
Message: 4
Date: Wed, 22 Aug 2012 12:54:22 +0200
From: "Ruben S. Montero" <rsmontero at opennebula.org>
To: Lawrence Chiong <junix88 at gmail.com>
Cc: users <Users at lists.opennebula.org>
Subject: Re: [one-users] How-to set RAM on Running KVM VM in CentOS
6.2x86 + openNebula v3.6
Message-ID:
<CAGi56tdQxBoCEMD0+EVzqkZjGkKs29B+R5e5zkN_-=w9wEzeBg at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
Just to answer the initial question from Junix, OpenNebula 3.6 does not
support hot-resize of CPU and MEMORY. As described in this thread, this can
be achieved somehow by interacting directly with the hypervisor although it
may lead to an inconsistent VM state in terms of resouce consumption.
Given the interest show in this thread we will evaluate its implementation
for future versions.
Cheers and thanks for your great feedback!
Ruben
On Wed, Aug 22, 2012 at 11:06 AM, Andr? Monteiro <andre.monteir at gmail.com>wrote:
> Hello,
>
> There is a more pratical and fast way:
> - open virt-manager and click for VM details
> - shutdown VM on OpenNebula
> - change RAM and CPU on virt-manager, it will update libvirt xml correctly
> - restart machine on OpenNebula
>
> The only catch is that OpenNebula doesn't know about this change and can
> overcommit resources.
>
> --
> Andr? Monteiro
>
>
>
>
> On Wed, Aug 22, 2012 at 8:17 AM, cloud.b.lab <cloud.b.lab at zoho.com> wrote:
>
>> **
>> Junix,
>>
>> *There is an indirect method*, *but I do not recommend that as it will
>> send wrong and incorrect signals to OpenNebula Monitoring program and if
>> you do not have fast hands, your VM will end up in "unkn" state.*
>>
>> Again I am saying I it is not a recommend practice and you don't try it
>> in a non test environment.
>>
>>
>> If you would like to try it for information purpose , do the following:
>>
>> 1. Create a test vm and login.
>> e.g. 153 oneadmin oneadmin centos63 runn 10 *1024M* onehost
>> 0d 00h12
>>
>> 2. Verify the total memory using "free" command
>>
>> 3. Go to the machine running libvirt [means your OpenNebula Node]
>>
>> 4. Get the doamin ID using virsh list
>>
>> 5. Get a xmldump of running domain virsh dumpxml <Domain-ID>
>> <file-name>
>> e.g. virsh dumpxml 7 > /var/lib/one/template/one-149
>>
>> 6. Open the XML and change the memory values, Save. Assume currently it
>> is 1048576.
>> <memory>2095104</memory>
>> <currentMemory>2095104</currentMemory>
>>
>> 7. Destroy the running domain virsh destroy 6
>>
>> 8. List all doamins in Shut-off state virsh list --all
>>
>> 9. If it is there in shut-off state, undefine it virsh undefine
>> <DOAMIn-NAME>
>> e.g. virsh undefine one-149
>>
>> 10. Recreate the doamin using the XML
>> e.g. virsh create /var/lib/one/template/one-149
>>
>> 11. Connect through VNC , login as root and check with "free". You will
>> see a higher MEM value
>>
>> 11. Give onevm top ,Wait for some time: OpenNebula reports the following.
>>
>> 153 oneadmin oneadmin centos63 runn 5 *2G* onehost 0d
>> 00h24
>>
>>
>> Thanks and regards,
>> Anil Kumar
>>
>>
>>
>> ---- On Tue, 21 Aug 2012 22:38:39 -0700 *cloud.b.lab<cloud.b.lab at zoho.com
>> >* wrote ----
>>
>> As per my limited understanding:
>>
>> The RAM size you specify in the VM template using "MEMORY=xxxx"
>> translates to "Maximum available memory" for an active domain.
>> Hence, while the domain being active , I think one cannot go beyond the
>> available/max mem.
>>
>> If you edit the XML file through libvirt and force change the Maximum
>> memory value to anything higher, you may end up in Kernel Panic situation.
>>
>> If you would like to try it , do the following:
>> 1. Create a test vm
>> 2. Verify the total memory using "free" command
>> 3. Go to the machine running libvirt
>> 4. Get the doamin ID using virsh list
>> 5. Save the current state of doamin using virsh save <Doamin_ID>
>> <Filename-with-domain-name>
>> (so that you have a copy of it)
>> 6. Restore the doamin using virsh
>> <Filename-with-domain-name>
>> 5. Edit the doamin XML using virsh edit
>> <DOMAIN_ID>
>> 6. Try to change values for <memory> and <currentMemory> tags to a higher
>> value divisible by 1024.
>> Assume current <memory> is 1048576.
>> e.g.
>> <memory>2095104</memory>
>> <currentMemory>2095104</currentMemory>
>> 7. Try to reboot the doamin virsh reboot
>> <DOAMIn-ID>
>> 8. Check available memory using "free"
>> 9. Try issue setmaxmem command to increase memory to 2095104 virsh
>> setmaxmem <DOAMIn-ID> 2095104
>>
>> oneadmin at onehost:~$ virsh setmaxmem 4 2095104
>> error: Unable to change MaxMemorySize
>> error: Requested operation is not valid: cannot resize the maximum memory
>> on an active domain
>> 10. Try to increase available memory
>> oneadmin at onehost:~$ virsh setmem 4 2095104
>> error: Requested memory size 2095104 kb is larger than maximum of 1048576
>> kb
>>
>> Hope this helps.....
>>
>> Regards,
>> Anil.
>>
>>
>>
>> ---- On Tue, 21 Aug 2012 10:42:41 -0700 *Lawrence Chiong<
>> junix88 at gmail.com>* wrote ----
>>
>> Hello,
>>
>> Can anyone guide me a step-by-step guide on HOWTO change/update RAM on a
>> fly / running VM (KVM). Because I tried changing my VM template (in
>> sunstone) its Memory (e.g. from 2048M to 4096M) and then reboot my KVM VM
>> but changes made doesn't take effect. So I tried manually changed the
>> .../deployment.0 file and update the Memory element and update also the
>> vm_pool table on body field +Memory element to 4096M then I restarted
>> "oned" + "sunstone" so with mysqld BUT still the memory being updated
>> doesn't changed.
>>
>> Any help is very much appreciated.
>>
>> Thank you.
>>
>> Junix
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>>
>
> _______________________________________________
> Users mailing list
> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
>
--
Ruben S. Montero, PhD
Project co-Lead and Chief Architect
OpenNebula - The Open Source Solution for Data Center Virtualization
www.OpenNebula.org | rsmontero at opennebula.org | @OpenNebula
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