13.2. 部署 Real-time Compute 角色

流程

1. 基于 /usr/share/openstack-tripleo-heat-templates/environments/compute-real-time-example.yaml 文件，创建一个 compute-real-time.yaml 环境文件，该文件为 ComputeRealTime 角色设置参数。

   cp /usr/share/openstack-tripleo-heat-templates/environments/compute-real-time-example.yaml /home/stack/templates/compute-real-time.yaml

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   该文件必须包含以下参数的值：

   • IsolCpusList 和 NovaComputeCpuDedicatedSet ：隔离 CPU 内核和虚拟 CPU 列表，以便为实时工作负载保留。这个值取决于您的实时 Compute 节点的 CPU 硬件。
   • NovaComputeCpuSharedSet ：要为仿真程序线程保留的主机 CPU 列表。
   • KernelArgs ：用来传递给 Real-time Compute 节点的内核的参数。例如，您可以使用 default_hugepagesz=1G hugepagesz=1G hugepages=<number_of_1G_pages_to_reserve> hugepagesz=2M hugepages=<number_of_2M_pages> 定义具有多个大小的客户机的内存要求。在这个示例中，默认大小为 1GB，但您也可以保留 2M 巨页。
   • NovaComputeDisableIrqBalance ：确保为 Real-time Compute 节点将此参数设置为 true，因为 tuned 服务为实时部署管理 IRQ 平衡，而不是 irqbalance 服务。

2. 将 ComputeRealTime 角色添加到您的角色数据文件并重新生成该文件。例如：

   $ openstack overcloud roles generate -o /home/stack/templates/rt_roles_data.yaml Controller Compute ComputeRealTime

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   此命令生成 ComputeRealTime 角色，其内容类似以下示例，并将 ImageDefault 选项设置为 overcloud-realtime-compute。

   - name: ComputeRealTime
     description: |
       Compute role that is optimized for real-time behaviour. When using this role
       it is mandatory that an overcloud-realtime-compute image is available and
       the role specific parameters IsolCpusList, NovaComputeCpuDedicatedSet and
       NovaComputeCpuSharedSet are set accordingly to the hardware of the real-time compute nodes.
     CountDefault: 1
     networks:
       InternalApi:
         subnet: internal_api_subnet
       Tenant:
         subnet: tenant_subnet
       Storage:
         subnet: storage_subnet
     HostnameFormatDefault: '%stackname%-computerealtime-%index%'
     ImageDefault: overcloud-realtime-compute
     RoleParametersDefault:
       TunedProfileName: "realtime-virtual-host"
       KernelArgs: ""      # these must be set in an environment file
       IsolCpusList: ""    # or similar according to the hardware
       NovaComputeCpuDedicatedSet: ""  # of real-time nodes
       NovaComputeCpuSharedSet: ""     #
       NovaLibvirtMemStatsPeriodSeconds: 0
     ServicesDefault:
       - OS::TripleO::Services::Aide
       - OS::TripleO::Services::AuditD
       - OS::TripleO::Services::BootParams
       - OS::TripleO::Services::CACerts
       - OS::TripleO::Services::CephClient
       - OS::TripleO::Services::CephExternal
       - OS::TripleO::Services::CertmongerUser
       - OS::TripleO::Services::Collectd
       - OS::TripleO::Services::ComputeCeilometerAgent
       - OS::TripleO::Services::ComputeNeutronCorePlugin
       - OS::TripleO::Services::ComputeNeutronL3Agent
       - OS::TripleO::Services::ComputeNeutronMetadataAgent
       - OS::TripleO::Services::ComputeNeutronOvsAgent
       - OS::TripleO::Services::Docker
       - OS::TripleO::Services::Fluentd
       - OS::TripleO::Services::IpaClient
       - OS::TripleO::Services::Ipsec
       - OS::TripleO::Services::Iscsid
       - OS::TripleO::Services::Kernel
       - OS::TripleO::Services::LoginDefs
       - OS::TripleO::Services::MetricsQdr
       - OS::TripleO::Services::MySQLClient
       - OS::TripleO::Services::NeutronBgpVpnBagpipe
       - OS::TripleO::Services::NeutronLinuxbridgeAgent
       - OS::TripleO::Services::NeutronVppAgent
       - OS::TripleO::Services::NovaCompute
       - OS::TripleO::Services::NovaLibvirt
       - OS::TripleO::Services::NovaLibvirtGuests
       - OS::TripleO::Services::NovaMigrationTarget
       - OS::TripleO::Services::ContainersLogrotateCrond
       - OS::TripleO::Services::OpenDaylightOvs
       - OS::TripleO::Services::Podman
       - OS::TripleO::Services::Rhsm
       - OS::TripleO::Services::RsyslogSidecar
       - OS::TripleO::Services::Securetty
       - OS::TripleO::Services::SensuClient
       - OS::TripleO::Services::SkydiveAgent
       - OS::TripleO::Services::Snmp
       - OS::TripleO::Services::Sshd
       - OS::TripleO::Services::Timesync
       - OS::TripleO::Services::Timezone
       - OS::TripleO::Services::TripleoFirewall
       - OS::TripleO::Services::TripleoPackages
       - OS::TripleO::Services::Vpp
       - OS::TripleO::Services::OVNController
       - OS::TripleO::Services::OVNMetadataAgent

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   有关自定义角色和 roles-data.yaml 的常规信息，请参阅 角色。

3. 创建 compute-realtime 类别，以标记您要为实时工作负载指定的节点。例如：

   $ source ~/stackrc
   $ openstack flavor create --id auto --ram 6144 --disk 40 --vcpus 4 compute-realtime
   $ openstack flavor set --property "cpu_arch"="x86_64" --property "capabilities:boot_option"="local" --property "capabilities:profile"="compute-realtime" compute-realtime

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4. 使用 compute-realtime 配置集标记您要为实时工作负载指定的每个节点。

   $ openstack baremetal node set --property capabilities='profile:compute-realtime,boot_option:local' <node_uuid>

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5. 通过创建包含以下内容的环境文件，将 ComputeRealTime 角色映射到 compute-realtime 类别：

   parameter_defaults:
     OvercloudComputeRealTimeFlavor: compute-realtime

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6. 使用其他环境文件将环境文件和新角色文件添加到堆栈中，并部署 overcloud：

   (undercloud)$ openstack overcloud deploy --templates \
    -e [your environment files] \
    -r /home/stack/templates/rt~/my_roles_data.yaml \
    -e home/stack/templates/compute-real-time.yaml

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