[rhos-list] how to install more compute nodes

[Jacob Liberman]

On 04/11/2013 10:19 AM, Vogel Nicolas wrote:
>
> Thanks Jacob for this infos !
>
> I think I must also create keystonerc_admin and keystonerc_username 
> file on my controller and source it on demand to make my install right?
>

it depends on how you make the changes

if you are using the command line tools then yes

if you are using packstack the keystonerc will be installed 
automatically wherever you install the client tools

you can also download the user environment vars from the horizon dashboard

> Do I also have to modify or complete something on my controller node 
> so that he knows about the new compute node?
>

no, just start the services on the compute node. it will add itself if 
everything is configured correctly.

you can verify with "nova-manage service list"

> Cheers,
>
> Nicolas.
>
> *From:*Jacob Liberman [mailto:jliberma at redhat.com]
> *Sent:* jeudi 11 avril 2013 16:51
> *To:* Perry Myers
> *Cc:* Vogel Nicolas; 'rhos-list at redhat.com'
> *Subject:* Re: [rhos-list] how to install more compute nodes
>
> On 04/11/2013 09:23 AM, Perry Myers wrote:
>
>     On 04/11/2013 09:59 AM, Vogel Nicolas wrote:
>
>         Hi,
>
>           
>
>           
>
>           
>
>         I just finished to install a controller node with the latest official
>
>         RedHat doc (but I’m working with CentOS 6.3 and EPEL packages).
>
>           
>
>         I’m using nova-network with FlatDHCP and not quantum in this test.
>
>           
>
>         Now I wan’t to extend my cloud with more compute nodes but i’m not
>
>         really sure about the different services who must be installed on each
>
>         compute node.
>
>           
>
>         In a first time, I wan’t to centralize all my services on the
>
>         controller, the computes nodes must give me just more CPU and more disk
>
>         space. So I think that basically I just need to install nova-compute,
>
>         nova-api and cinder on the compute nodes is that right?
>
>       
>
>     nova-compute and cinder, but I do not think you need additional nova-api
>
>     on the add'l compute nodes
>
>
> nova-compute, nova-network (if you want multi_host/HA networking) and 
> nova-metadata-api if you are passing any customizations to the 
> instances during boot
>
> you can run cinder-volumes on all nodes but there are some issues. 
> better to use a centralized cinder server or cinder backed by a 
> distributed file system.
>
> you specify the other service endpoints in the compute node's nova.conf.
>
>       
>
>       
>
>         How do I configure this services on the compute node so they know that
>
>         Keystone, Glance, etc.. are on the controller?
>
>       
>
>     Jacob, do you have a writeup around this area?  Taking an existing RHOS
>
>     install and adding compute nodes to it?
>
>
> yes, it will be publicly available in the next few weeks.
>
> i am happy to answer specific questions before the document is available.
>
>
>       
>
>     Perry
>
>       
>
>         If someone has nova.conf and keystone.conf example from it would be very
>
>         helpful.
>
>           
>
>           
>
>
>
> Here is a nova.conf from a compute node.
>
> The controller IP (glance, keystone, cinder, nova-scheduler) is 
> 10.16.37.100
> The compute node IP (nova-compute,nova-network) is 10.16.137.102
>
> the metadata_hostvalue may differ depending on what you are running where
>
>
> [DEFAULT]
> verbose=false
> connection_type=libvirt
> sql_connection=mysql://nova:9f63b4ec6b074b1c@10.16.137.100/nova 
> <mailto:sql_connection=mysql://nova:9f63b4ec6b074b1c@10.16.137.100/nova>
> state_path=/var/lib/nova
> lock_path=/var/lib/nova/tmp
> glance_api_servers=10.16.137.100:9292
> metadata_host=10.16.137.100
> network_manager=nova.network.manager.FlatDHCPManager
> rootwrap_config=/etc/nova/rootwrap.conf
> service_down_time=60
> volume_api_class=nova.volume.cinder.API
> auth_strategy=keystone
> compute_driver=libvirt.LibvirtDriver
> public_interface=eth0
> dhcpbridge=/usr/bin/nova-dhcpbridge
> flat_network_bridge=br100
> flat_injected=false
> flat_interface=eth1
> floating_range=10.16.143.108/30
> fixed_range=172.16.2.0/24
> network_host=10.16.137.102
> force_dhcp_release=true
> dhcp_domain=novalocal
> logdir=/var/log/nova
> rpc_backend=nova.openstack.common.rpc.impl_qpid
> rabbit_host=localhost
> qpid_hostname=10.16.137.100
> libvirt_type=kvm
> libvirt_inject_partition=-1
> novncproxy_base_url=http://10.16.137.100:6080/vnc_auto.html
> vncserver_listen=10.16.137.102
> vncserver_proxyclient_address=10.16.137.102
> vnc_enabled=true
> image_service=nova.image.glance.GlanceImageService
> multi_host = True
> [trusted_computing]
> [keystone_authtoken]
>
>
> thanks, jacob
>
>
>
>           
>
>           
>
>         Thanks in advance,
>
>           
>
>           
>
>           
>
>         Nicolas.
>
>       
>

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