Re: [one-users] Opennebula and openvswitch problem.
I've ended on the new deployment of opennebula on clean installation of ubuntu server 14.04. I've had too many problems with settings this production ready. I'll write a feedback after setting it up. 2014-04-03 21:50 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com: I use the Libvirt provided on the Ubuntu Cloud Archive (along with Qemu and Open vSwitch packages) and everything works well out of the box. *From:* Leszek Master [mailto:keks...@gmail.com] *Sent:* Thursday, April 03, 2014 3:43 PM *To:* Campbell, Bill *Cc:* Users OpenNebula; Stefan Kooman *Subject:* Re: [one-users] Opennebula and openvswitch problem. I described this parameters in the datastore before. I've added the BRIDGE_LIST, DISK_TYPE, CEPH_USER, POOL_NAME, CEPH_SECRET, CEPH HOST (with port) and rest of the attributes that were added automatically after i choose ceph datastore type. It worked like a charm before i've upgraded my libvirt. Is it possible that i've compiled libvirt without ceph support (i've added flag --with-storage-rbd)? Or maybe i need to compile something more than only libvirt 1.0? 2014-04-03 21:00 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com : Libvirt versions greater than 1.0 handle clusters with CephX authentication differently. It is no longer as simple as adding the ceph.conf and keyring to the /etc/ceph directory, you MUST specify a libvirt secret and cluster configuration information within the VM definition file (using the attributes for the datastores as specified in the OpenNebula documentation for Ceph Datastores). Libvirt before would just look into the /etc/ceph directory for information if the appropriate configuration information did not exist, yet the new versions expect that information in the definition, otherwise it assumes there is NO cephx authentication in use. -- *From: *Leszek Master keks...@gmail.com *To: *Bill Campbell bcampb...@axcess-financial.com *Cc: *Users OpenNebula users@lists.opennebula.org, Stefan Kooman ste...@bit.nl *Sent: *Thursday, April 3, 2014 1:30:59 PM *Subject: *Re: [one-users] Opennebula and openvswitch problem. Yes i'm using ceph. It happened after compiling libvirt from sources to version 1.0. 3 kwi 2014 19:29 Campbell, Bill bcampb...@axcess-financial.com napisał(a): That looks like it's having a problem locating the disk file. Are you using Ceph? -- *From: *Leszek Master keks...@gmail.com *To: *Bill Campbell bcampb...@axcess-financial.com *Cc: *Stefan Kooman ste...@bit.nl, Users OpenNebula users@lists.opennebula.org *Sent: *Thursday, April 3, 2014 12:19:09 PM *Subject: *Re: [one-users] Opennebula and openvswitch problem. I tried this now, the same error: migrate: Command virsh --connect qemu:///system migrate --live one-9 qemu+ssh://node-01/system failed: error: cannot open file 'one/one-4-9-0': No such file or directory I can migrate a VM to other VM's with older virsh version, may it be because the difference in virsh versions? 2014-04-03 13:35 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com : You could also leverage the Ubuntu Cloud Archive to update Open vSwitch, I believe the version on that official PPA is the version referenced as fixing that bug in the link provided. We use 12.04.x LTS w/ packages from the cloud archive and have no issues. -- *From: *Stefan Kooman ste...@bit.nl *To: *Leszek Master keks...@gmail.com *Cc: *Users OpenNebula users@lists.opennebula.org *Sent: *Thursday, April 3, 2014 5:01:12 AM *Subject: *Re: [one-users] Opennebula and openvswitch problem. Quoting Leszek Master (keks...@gmail.com): I'm waiting for official relese of next LTS version, i can use only LTS in my production, so i was testing it on the 12.04. If there isn't any official manual how ot solve this problem i'll upgrade my distro and try then :) Thanks for your help. Precise/quantal suffers from this bug: https://bugs.launchpad.net/bugs/1084028 Fixed in newer releases: saucy / trusty (tested by me). This is apart from the legacy bridging stuff. With virtualization development happening so quickly I would recommend going for newer instead of older. Hopefully linux 3.14 and Qemu 2.0 will make it into Trusty ... Gr. Stefan -- | BIT BV http://www.bit.nl/Kamer van Koophandel 09090351 | GPG: 0xD14839C6 +31 318 648 688 / i...@bit.nl ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org *NOTICE: Protect the information in this message in accordance with the company's security policies. If you received this message in error, immediately notify the sender and destroy all copies.* *NOTICE: Protect the information in this message in accordance with the company's security policies. If
[one-users] Let a user install its own VM
Hello all, Is there a way to use the an ISO of CentOS, Ubuntu, Debian or Windows and let a user install its own VM from scratch. I would like to do that instead of giving the user the choices between pre installed versions of above OS's. Is there a way to do this? Or how can I do this? -- Kind regards, Duez Christophe Student at University of Antwerp : Master of Industrial Sciences: Electronics-ICT E christophe.d...@student.uantwperen.be L linkedin duez-christophehttp://www.linkedin.com/pub/duez-christophe/74/7/39 ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] Assigning limited admin rights
Hi, Adding to what Rubén said, the acl modification is only allowed for users in the oneadmin group. Make sure you use the reference command-auth tables in the xml-rpc doc [1] to create your rules. For example, oneuser passwd requires USER:MANAGE. The rule #user_id USER/* USE+MANAGE+ADMIN will allow your user to change oneadmin's password. In this case, you will want to create a rule targeting each group (excluding oneadmin). Regards [1] http://docs.opennebula.org/4.4/integration/system_interfaces/api.html#authorization-requests-reference -- Carlos Martín, MSc Project Engineer OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org | cmar...@opennebula.org | @OpenNebulahttp://twitter.com/opennebulacmar...@opennebula.org On Thu, Apr 3, 2014 at 2:19 PM, Ruben S. Montero rsmont...@opennebula.orgwrote: Hi Probably, the following may work... oneacl create #user_id USER/* CREATE oneacl create #user_id USER/* USE+MANAGE+ADMIN Take a look to the ACL guide for more info: http://docs.opennebula.org/4.4/administration/users_and_groups/manage_acl.html Cheers Ruben On Thu, Apr 3, 2014 at 12:08 PM, Wilma Hermann wilma.herm...@gmail.comwrote: Hi, Is it possible to assign limited admin rights to certain accounts? I would like to have a user that is allowed to do all the user management (creating users, adding users to existing groups, etc.) without adding this user to the oneadmin-group. In particular, I would like to deny this user access to all other users' VMs, templates, images, etc. The user also shouldn't have write-access to the ACLs (otherwise limits would make no sense obviously). Greetings Wilma ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org -- -- Ruben S. Montero, PhD Project co-Lead and Chief Architect OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org | rsmont...@opennebula.org | @OpenNebula ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] Let a user install its own VM
Christophe, take a look at this blog post: http://opennebula.org/screencast-bootstrapping-opennebula-3-4-and-creating-a-vm-from-scratch/ It's for an older version of OpenNebula (you won't even recognize the interface), but the principles are still the same. cheers, Jaime On Fri, Apr 4, 2014 at 10:06 AM, Christophe Duez christophe.d...@student.uantwerpen.be wrote: Hello all, Is there a way to use the an ISO of CentOS, Ubuntu, Debian or Windows and let a user install its own VM from scratch. I would like to do that instead of giving the user the choices between pre installed versions of above OS's. Is there a way to do this? Or how can I do this? -- Kind regards, Duez Christophe Student at University of Antwerp : Master of Industrial Sciences: Electronics-ICT E christophe.d...@student.uantwperen.be L linkedin duez-christophehttp://www.linkedin.com/pub/duez-christophe/74/7/39 ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org -- Jaime Melis Project Engineer OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org | jme...@opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] Let a user install its own VM
On 04/04/14 18:06, Christophe Duez wrote: Hello all, Is there a way to use the an ISO of CentOS, Ubuntu, Debian or Windows and let a user install its own VM from scratch. I've found the easiest way to do this is to create your image as an empty datablock, make it persistent, then create a template that mounts it as your first disk, along with any installation media. The VM's BIOS will see the lack of an OS on the disk, and go looking for CD-ROMs and PXE servers to boot from. When your OS installation is complete, you can blow away the VM, update the template to drop the references to the images, and optionally, toggle the persistence state of the image. Voilá, there's your image. For Linux, I'd recommend setting up a PXE boot server to install the image. We do this for deploying real PCs on our network (in fact, our OpenNebula hosts are deployed that way: Ubuntu pre-seed scripts over PXE), and it works equally as well for VMs. Bonus being you don't need to edit the template at the end, you just toggle the 'persistent' state on the image. -- Stuart Longland Systems Engineer _ ___ \ /|_) | T: +61 7 3535 9619 \/ | \ | 38b Douglas StreetF: +61 7 3535 9699 SYSTEMSMilton QLD 4064 http://www.vrt.com.au ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] Opennebula and openvswitch problem.
Ubuntu server 14.04 doesn't have opennebula in repo. So i decidec to do Campbell way. I've installed clean Ubuntu Server 12.04 LTS, added cloud repository and installed everything. I've got the same error: failed: error: Unable to add bridge br0 port vnet0: Operation not supported It still doesn't work without brcompat :(. Now i have to manually downgrade openvswitch version from 1.10.2 to 1.4.6 to get brcompat working. 2014-04-04 9:03 GMT+02:00 Leszek Master keks...@gmail.com: I've ended on the new deployment of opennebula on clean installation of ubuntu server 14.04. I've had too many problems with settings this production ready. I'll write a feedback after setting it up. 2014-04-03 21:50 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com : I use the Libvirt provided on the Ubuntu Cloud Archive (along with Qemu and Open vSwitch packages) and everything works well out of the box. *From:* Leszek Master [mailto:keks...@gmail.com] *Sent:* Thursday, April 03, 2014 3:43 PM *To:* Campbell, Bill *Cc:* Users OpenNebula; Stefan Kooman *Subject:* Re: [one-users] Opennebula and openvswitch problem. I described this parameters in the datastore before. I've added the BRIDGE_LIST, DISK_TYPE, CEPH_USER, POOL_NAME, CEPH_SECRET, CEPH HOST (with port) and rest of the attributes that were added automatically after i choose ceph datastore type. It worked like a charm before i've upgraded my libvirt. Is it possible that i've compiled libvirt without ceph support (i've added flag --with-storage-rbd)? Or maybe i need to compile something more than only libvirt 1.0? 2014-04-03 21:00 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com : Libvirt versions greater than 1.0 handle clusters with CephX authentication differently. It is no longer as simple as adding the ceph.conf and keyring to the /etc/ceph directory, you MUST specify a libvirt secret and cluster configuration information within the VM definition file (using the attributes for the datastores as specified in the OpenNebula documentation for Ceph Datastores). Libvirt before would just look into the /etc/ceph directory for information if the appropriate configuration information did not exist, yet the new versions expect that information in the definition, otherwise it assumes there is NO cephx authentication in use. -- *From: *Leszek Master keks...@gmail.com *To: *Bill Campbell bcampb...@axcess-financial.com *Cc: *Users OpenNebula users@lists.opennebula.org, Stefan Kooman ste...@bit.nl *Sent: *Thursday, April 3, 2014 1:30:59 PM *Subject: *Re: [one-users] Opennebula and openvswitch problem. Yes i'm using ceph. It happened after compiling libvirt from sources to version 1.0. 3 kwi 2014 19:29 Campbell, Bill bcampb...@axcess-financial.com napisał(a): That looks like it's having a problem locating the disk file. Are you using Ceph? -- *From: *Leszek Master keks...@gmail.com *To: *Bill Campbell bcampb...@axcess-financial.com *Cc: *Stefan Kooman ste...@bit.nl, Users OpenNebula users@lists.opennebula.org *Sent: *Thursday, April 3, 2014 12:19:09 PM *Subject: *Re: [one-users] Opennebula and openvswitch problem. I tried this now, the same error: migrate: Command virsh --connect qemu:///system migrate --live one-9 qemu+ssh://node-01/system failed: error: cannot open file 'one/one-4-9-0': No such file or directory I can migrate a VM to other VM's with older virsh version, may it be because the difference in virsh versions? 2014-04-03 13:35 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com : You could also leverage the Ubuntu Cloud Archive to update Open vSwitch, I believe the version on that official PPA is the version referenced as fixing that bug in the link provided. We use 12.04.x LTS w/ packages from the cloud archive and have no issues. -- *From: *Stefan Kooman ste...@bit.nl *To: *Leszek Master keks...@gmail.com *Cc: *Users OpenNebula users@lists.opennebula.org *Sent: *Thursday, April 3, 2014 5:01:12 AM *Subject: *Re: [one-users] Opennebula and openvswitch problem. Quoting Leszek Master (keks...@gmail.com): I'm waiting for official relese of next LTS version, i can use only LTS in my production, so i was testing it on the 12.04. If there isn't any official manual how ot solve this problem i'll upgrade my distro and try then :) Thanks for your help. Precise/quantal suffers from this bug: https://bugs.launchpad.net/bugs/1084028 Fixed in newer releases: saucy / trusty (tested by me). This is apart from the legacy bridging stuff. With virtualization development happening so quickly I would recommend going for newer instead of older. Hopefully linux 3.14 and Qemu 2.0 will make it into Trusty ... Gr. Stefan -- | BIT BV http://www.bit.nl/Kamer van Koophandel 09090351 | GPG: 0xD14839C6 +31 318 648
Re: [one-users] Opennebula and openvswitch problem.
Quoting Leszek Master (keks...@gmail.com): Ubuntu server 14.04 doesn't have opennebula in repo. So i decidec to do Campbell way. I've installed clean Ubuntu Server 12.04 LTS, added cloud repository and installed everything. I've got the same error: failed: error: Unable to add bridge br0 port vnet0: Operation not supported It still doesn't work without brcompat :(. Now i have to manually downgrade openvswitch version from 1.10.2 to 1.4.6 to get brcompat working. You might want to do it another way: hypervisors: Trusty In a virtual machine: opennebula on precise/raring/quantal/saucy Gr. Stefan -- | BIT BV http://www.bit.nl/Kamer van Koophandel 09090351 | GPG: 0xD14839C6 +31 318 648 688 / i...@bit.nl ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] data store not created in VMHosts
Hi Hyun, I've looked at this issue and you're completely right. If /var/lib/one/datastores does not exist in the VMHost it will report that it doesn't have free space and therefore it will never deploy the VM, which means that the directory will never be created, which is a Catch 22. We haven't noticed this earlier because usually people share /var/lib/one/datastores and therefore you don't hit this issue. And people using SSH and upgrading from earlier version will not hit it because in previous pervious the disk capacity wasn't checked so it always created the directory. Long story short, bug confirmed, applying patch to monitor_ds.sh Thanks for the heads up. Cheers, Jaime On Mon, Mar 31, 2014 at 11:25 AM, Carlos Martín Sánchez cmar...@opennebula.org wrote: Hi, On Fri, Mar 28, 2014 at 7:40 PM, Hyun Woo Kim hyun...@fnal.gov wrote: If HostXML::test_ds_capacity only creates $DATASTORE_LOCATION/id assuming $DATASTORE_LOCATION itself exists, my next question here might be, which code creates $DATASTORE_LOCATION itself and when? I don't think I missed an instruction to create $DATASTORE_LOCATION manually in the ON documentation.. i.e. $DATASTORE_LOCATION must be created by ON codes (maybe) during the first VM deployment. But like I described in the original email, our test ON4.4 fails at this. Hyunwoo Kim FermiCloud The $DATASTORE_LOCATION/id dir is created by the tm drivers on the first deployment, using the ssh_make_path function (mkdir -p). As I said, I think the problem is not the dir creation, is with the mechanism to decide the first deployment on a new host. Regards -- Carlos Martín, MSc Project Engineer OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org http://www.opennebula.org/ | cmar...@opennebula.org | @OpenNebula http://twitter.com/opennebula ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org -- Jaime Melis Project Engineer OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org | jme...@opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] Opennebula and openvswitch problem.
Can you send the chunk of the log surrounding that error? I've not run into any issues around that so long as appropriate permissions/sudo privileges are configured. From: Leszek Master [mailto:keks...@gmail.com] Sent: Friday, April 04, 2014 7:10 AM To: Campbell, Bill Cc: Users OpenNebula; Stefan Kooman Subject: Re: [one-users] Opennebula and openvswitch problem. Ubuntu server 14.04 doesn't have opennebula in repo. So i decidec to do Campbell way. I've installed clean Ubuntu Server 12.04 LTS, added cloud repository and installed everything. I've got the same error: failed: error: Unable to add bridge br0 port vnet0: Operation not supported It still doesn't work without brcompat :(. Now i have to manually downgrade openvswitch version from 1.10.2 to 1.4.6 to get brcompat working. 2014-04-04 9:03 GMT+02:00 Leszek Master keks...@gmail.com mailto:keks...@gmail.com : I've ended on the new deployment of opennebula on clean installation of ubuntu server 14.04. I've had too many problems with settings this production ready. I'll write a feedback after setting it up. 2014-04-03 21:50 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com mailto:bcampb...@axcess-financial.com : I use the Libvirt provided on the Ubuntu Cloud Archive (along with Qemu and Open vSwitch packages) and everything works well out of the box. From: Leszek Master [mailto:keks...@gmail.com mailto:keks...@gmail.com ] Sent: Thursday, April 03, 2014 3:43 PM To: Campbell, Bill Cc: Users OpenNebula; Stefan Kooman Subject: Re: [one-users] Opennebula and openvswitch problem. I described this parameters in the datastore before. I've added the BRIDGE_LIST, DISK_TYPE, CEPH_USER, POOL_NAME, CEPH_SECRET, CEPH HOST (with port) and rest of the attributes that were added automatically after i choose ceph datastore type. It worked like a charm before i've upgraded my libvirt. Is it possible that i've compiled libvirt without ceph support (i've added flag --with-storage-rbd)? Or maybe i need to compile something more than only libvirt 1.0? 2014-04-03 21:00 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com mailto:bcampb...@axcess-financial.com : Libvirt versions greater than 1.0 handle clusters with CephX authentication differently. It is no longer as simple as adding the ceph.conf and keyring to the /etc/ceph directory, you MUST specify a libvirt secret and cluster configuration information within the VM definition file (using the attributes for the datastores as specified in the OpenNebula documentation for Ceph Datastores). Libvirt before would just look into the /etc/ceph directory for information if the appropriate configuration information did not exist, yet the new versions expect that information in the definition, otherwise it assumes there is NO cephx authentication in use. _ From: Leszek Master keks...@gmail.com mailto:keks...@gmail.com To: Bill Campbell bcampb...@axcess-financial.com mailto:bcampb...@axcess-financial.com Cc: Users OpenNebula users@lists.opennebula.org mailto:users@lists.opennebula.org , Stefan Kooman ste...@bit.nl mailto:ste...@bit.nl Sent: Thursday, April 3, 2014 1:30:59 PM Subject: Re: [one-users] Opennebula and openvswitch problem. Yes i'm using ceph. It happened after compiling libvirt from sources to version 1.0. 3 kwi 2014 19:29 Campbell, Bill bcampb...@axcess-financial.com mailto:bcampb...@axcess-financial.com napisał(a): That looks like it's having a problem locating the disk file. Are you using Ceph? _ From: Leszek Master keks...@gmail.com mailto:keks...@gmail.com To: Bill Campbell bcampb...@axcess-financial.com mailto:bcampb...@axcess-financial.com Cc: Stefan Kooman ste...@bit.nl mailto:ste...@bit.nl , Users OpenNebula users@lists.opennebula.org mailto:users@lists.opennebula.org Sent: Thursday, April 3, 2014 12:19:09 PM Subject: Re: [one-users] Opennebula and openvswitch problem. I tried this now, the same error: migrate: Command virsh --connect qemu:///system migrate --live one-9 qemu+ssh://node-01/system failed: error: cannot open file 'one/one-4-9-0': No such file or directory I can migrate a VM to other VM's with older virsh version, may it be because the difference in virsh versions? 2014-04-03 13:35 GMT+02:00 Campbell, Bill bcampb...@axcess-financial.com mailto:bcampb...@axcess-financial.com : You could also leverage the Ubuntu Cloud Archive to update Open vSwitch, I believe the version on that official PPA is the version referenced as fixing that bug in the link provided. We use 12.04.x LTS w/ packages from the cloud archive and have no issues. _ From: Stefan Kooman ste...@bit.nl mailto:ste...@bit.nl To: Leszek Master keks...@gmail.com mailto:keks...@gmail.com Cc: Users OpenNebula users@lists.opennebula.org mailto:users@lists.opennebula.org Sent: Thursday, April 3, 2014 5:01:12 AM Subject: Re: [one-users] Opennebula and openvswitch problem. Quoting Leszek Master
Re: [one-users] Opennebula and openvswitch problem.
Well, 2.0 will break libvirt in a couple of ways and opennebula uses libvirt so I don't think its gonna work out so well for early adopters. As for Linux 3.14, LTS gets regular kernel updates so it will have it eventually. I don't think its a good idea to stick to LTS for hypervisors, you will miss too much. KVM based hypervisors should get updated yearly to the latest stable build. VM infrastructures are easy when it comes to in place upgrades, especially opennebula. You can always add new nodes and retire older ones gracefully. On Thu, Apr 3, 2014 at 5:01 AM, Stefan Kooman ste...@bit.nl wrote: Quoting Leszek Master (keks...@gmail.com): I'm waiting for official relese of next LTS version, i can use only LTS in my production, so i was testing it on the 12.04. If there isn't any official manual how ot solve this problem i'll upgrade my distro and try then :) Thanks for your help. Precise/quantal suffers from this bug: https://bugs.launchpad.net/bugs/1084028 Fixed in newer releases: saucy / trusty (tested by me). This is apart from the legacy bridging stuff. With virtualization development happening so quickly I would recommend going for newer instead of older. Hopefully linux 3.14 and Qemu 2.0 will make it into Trusty ... Gr. Stefan -- | BIT BV http://www.bit.nl/Kamer van Koophandel 09090351 | GPG: 0xD14839C6 +31 318 648 688 / i...@bit.nl ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] scheduler interval
If you look at openstack, they use a message queue for dispatching (rabbitmq), but I think opennebula has a more elegant and simpler solution. VMs in large environments can be deployed in batches because there are several nodes that can deploy them at once, so once in 30 seconds for a opennebula cluster of 50 hypervisors like in our environment is 6000 VMs per hour! On Fri, Mar 7, 2014 at 10:29 AM, Andrea Gardiman andreagardi...@gmail.comwrote: Ok, but I don't understand why it works like a pull model instead of push. Is so because of a too high load matter or only because the initial architectural decision was to work like that and now it is still so? What would be the drawbacks if were the core,immediately every time a request arrive, tell to the scheduler to schedule that request? My question comes because I'm working on improving the deployment time of VMs for my master thesis, and I understood that I can choose to deploy VMs little by little, or immediately as they come but I can't see the cases in which deploy VMs little by little would be better that process them immediately. Thanks a lot, Andrea Gardiman. On Mar 7, 2014 10:58 AM, Carlos Martín Sánchez cmar...@opennebula.org wrote: Hi, On Thu, Mar 6, 2014 at 1:30 PM, Andrea Gardiman andreagardi...@gmail.com wrote: Dear all, I do not understand the usefulness of the scheduler parameter SCHED_INTERVAL. Why the scheduler act as a periodic task and have to wait a fixed period to schedule all the pending jobs instead of to be event-driven and schedule immediately a request? What are the benefits and the drawbacks, besides the wait? Thanks a lot, Andrea Gardiman. The scheduler is a separate daemon. So it polls the core periodically to look for pending VMs. The usefulness of the SCHED_INTERVAL is that, combined with the other config parameters [1] MAX_DISPATCH and MAX_HOST, allows you to configure a buffer to deploy VMs little by little, or immediately as they come. Regards [1] http://docs.opennebula.org/stable/administration/references/schg.html -- Carlos Martín, MSc Project Engineer OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org | cmar...@opennebula.org | @OpenNebulahttp://twitter.com/opennebulacmar...@opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
