Thank you Carlos, the string with a list of hostnames is a really good idea. I'm already using onegate for other parts (haproxy etc) so it make sense. Should not be difficult to deal with hostname that way.
best regards Edouard Le Mon Jan 26 2015 at 19:09:42, Carlos Martín Sánchez < cmar...@opennebula.org> a écrit : > Hi, > > On Fri, Jan 23, 2015 at 2:06 PM, Madko <madk...@gmail.com> wrote: > >> >> We'd like to have 4 VMs >> >> 1 VM with role "LVS", no problem here, using a lvs VM template >> 3 VM with role "WEB", using a web VM template. I need to set explicitly >> their hostnames, no digit allowed (let's say obfuscated-vm-name-a, >> obfuscated-vm-name-b and obfuscated-vm-name-ab) >> >> how do I set each hostname in the service template? >> > > I think the best option is to have one role for each VM. My guess is that > if we came up with a new generic syntax to define a vm_template_contents > for each VM, it would probably be just as inconvenient as having one Role > per VM. > > But for your specific case, maybe you can define a string with a list of > hostnames, e.g. : "host_a,host_b,host_c" > And then create a context script to coordinate which hostname has to be > set for each instance. The onegate component [1] may be useful for this. > > Regards. > > [1] > http://docs.opennebula.org/4.10/advanced_administration/application_flow_and_auto-scaling/appflow_use_cli.html#sharing-information-between-vms > > -- > 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> > > On Fri, Jan 23, 2015 at 2:06 PM, Madko <madk...@gmail.com> wrote: > >> Sorry I don't think it fit our use case. >> >> We'd like to have 4 VMs >> >> 1 VM with role "LVS", no problem here, using a lvs VM template >> 3 VM with role "WEB", using a web VM template. I need to set explicitly >> their hostnames, no digit allowed (let's say obfuscated-vm-name-a, >> obfuscated-vm-name-b and obfuscated-vm-name-ab) >> >> how do I set each hostname in the service template? >> >> Le Fri Jan 23 2015 at 12:11:07, Carlos Martín Sánchez < >> cmar...@opennebula.org> a écrit : >> >> Hi there, >>> >>> On Thu, Jan 22, 2015 at 2:18 PM, Madko <madk...@gmail.com> wrote: >>> >>> How do you set hostname to VMs inside roles when you can't use numeric >>>> hostname (ie hostname%i)? >>> >>> >>> You can use the VM ID inside the context, the following works for me: >>> "CONTEXT = [ HOSTNAME = TEST_$VMID ]" >>> >>> Or the VM name. This VM name can be changed the vm_name_template option >>> in oneflow-server.conf [1]. >>> "CONTEXT = [ HOSTNAME = $NAME ]" >>> >>> Does it fit your use case? >>> >>> Regards >>> >>> [1] >>> http://docs.opennebula.org/4.10/advanced_administration/application_flow_and_auto-scaling/appflow_configure.html >>> >>> -- >>> Carlos Martín, MSc >>> Project Engineer >>> OpenNebula - Flexible Enterprise Cloud Made Simple >>> www.OpenNebula.org | cmar...@opennebula.org | @OpenNebula >>> <http://twitter.com/opennebula> <cmar...@opennebula.org> >>> >>> On Thu, Jan 22, 2015 at 2:18 PM, Madko <madk...@gmail.com> wrote: >>> >>>> That's what we were doing untill now, service template with 10 or more >>>> VM and therefor 10 or more roles (1:1 ratio) are not really convenient. But >>>> thanks for your suggestion. Maybe I'm missing something. Is it possible to >>>> change vm_template_contents to some sort of array? How do you set hostname >>>> to VMs inside roles when you can't use numeric hostname (ie hostname%i)? >>>> >>>> best regards >>>> >>>> Le Thu Jan 22 2015 at 11:25:29, Carlos Martín Sánchez < >>>> cmar...@opennebula.org> a écrit : >>>> >>>> Hi, >>>>> >>>>> On Wed, Jan 21, 2015 at 3:29 PM, Madko <madk...@gmail.com> wrote: >>>>> >>>>>> Hi, >>>>>> >>>>>> is there a way to overload the vm_template_contents of only one >>>>>> specific VM in a role? I'd like to fix the hostnames. >>>>>> I only manage to overload the context of all the VMs in one role. >>>>>> >>>>>> best regards, >>>>>> >>>>> >>>>> Maybe you can create a new role with the same template, and >>>>> cardinality 1. >>>>> Would that work for you? >>>>> >>>>> 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> >>>>> <cmar...@opennebula.org> >>>>> >>>>> >>>>> >>> >
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