10.3. Sample Deployment and Testing Scenario
The following example procedure uses a simple single-node deployment to test that the environment variables and other supporting configuration is set up correctly. Actual performance results might vary, depending on the number of nodes and guests that you deploy in your cloud.
Create the
compute-real-time.yamlfile with the following parameters:parameter_defaults: ComputeRealTimeParameters: IsolCpusList: "1" NovaVcpuPinSet: "1" KernelArgs: "default_hugepagesz=1G hugepagesz=1G hugepages=16"Create a new
rt_roles_data.yamlfile with theComputeRealTimerole.$ openstack overcloud roles generate -o ~/rt_roles_data.yaml Controller ComputeRealTime
Deploy the overcloud, adding both your new real-time roles data file and your real-time environment file to the stack along with your other environment files:
(undercloud) $ openstack overcloud deploy --templates \ -r /home/stack/rt_roles_data.yaml -e [your environment files] -e /home/stack/templates/compute-real-time.yaml
This command deploys one Controller node and one Real-time Compute node.
Log into the Real-time Compute node and check the following parameters. Replace
<...>with the values of the relevant parameters from thecompute-real-time.yaml.[root@overcloud-computerealtime-0 ~]# uname -a Linux overcloud-computerealtime-0 3.10.0-693.11.1.rt56.632.el7.x86_64 #1 SMP PREEMPT RT Wed Dec 13 13:37:53 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux [root@overcloud-computerealtime-0 ~]# cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-3.10.0-693.11.1.rt56.632.el7.x86_64 root=UUID=45ae42d0-58e7-44fe-b5b1-993fe97b760f ro console=tty0 crashkernel=auto console=ttyS0,115200 default_hugepagesz=1G hugepagesz=1G hugepages=16 [root@overcloud-computerealtime-0 ~]# tuned-adm active Current active profile: realtime-virtual-host [root@overcloud-computerealtime-0 ~]# grep ^isolated_cores /etc/tuned/realtime-virtual-host-variables.conf isolated_cores=<IsolCpusList> [root@overcloud-computerealtime-0 ~]# cat /usr/lib/tuned/realtime-virtual-host/lapic_timer_adv_ns X (X != 0) [root@overcloud-computerealtime-0 ~]# cat /sys/module/kvm/parameters/lapic_timer_advance_ns X (X != 0) [root@overcloud-computerealtime-0 ~]# cat /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages X (X != 0) [root@overcloud-computerealtime-0 ~]# grep ^vcpu_pin_set /var/lib/config-data/puppet-generated/nova_libvirt/etc/nova/nova.conf vcpu_pin_set=<NovaVcpuPinSet>
