配置计算服务以使用裸机服务¶

计算服务需要配置为使用裸机服务的驱动程序。计算服务的配置文件通常位于 /etc/nova/nova.conf。

注意

从 Newton 版本开始，可以运行多个 nova-compute 服务使用 ironic 虚拟驱动程序（在 nova 中）以提供冗余。裸机节点通过哈希环映射到这些服务。如果某个服务停止运行，可用的裸机节点将被重新映射到不同的服务。

一旦激活，节点将始终映射到相同的 nova-compute，即使它停止运行也是如此。在负责的服务恢复到活动状态之前，无法通过计算 API 管理该节点。

以下配置文件必须在计算服务的控制器节点和计算节点上进行修改。

在计算服务的配置文件中更改以下配置选项（例如，/etc/nova/nova.conf）

[default]

# Defines which driver to use for controlling virtualization.
# Enable the ironic virt driver for this compute instance.
compute_driver=ironic.IronicDriver

# Amount of memory in MB to reserve for the host so that it is always
# available to host processes.
# It is impossible to reserve any memory on bare metal nodes, so set
# this to zero.
reserved_host_memory_mb=0

[filter_scheduler]

# Enables querying of individual hosts for instance information.
# Not possible for bare metal nodes, so set it to False.
track_instance_changes=False

[scheduler]

# This value controls how often (in seconds) the scheduler should
# attempt to discover new hosts that have been added to cells.
# If negative (the default), no automatic discovery will occur.
# As each bare metal node is represented by a separate host, it has
# to be discovered before the Compute service can deploy on it.
# The value here has to be carefully chosen based on a compromise
# between the enrollment speed and the load on the Compute scheduler.
# The recommended value of 2 minutes matches how often the Compute
# service polls the Bare Metal service for node information.
discover_hosts_in_cells_interval=120

注意

设置 discover_hosts_in_cells_interval 选项的替代方法是在每个节点注册后，在任何计算控制器节点上运行以下命令

nova-manage cell_v2 discover_hosts --by-service

考虑在控制器节点上启用以下选项

[filter_scheduler]

# Enabling this option is beneficial as it reduces re-scheduling events
# for ironic nodes when scheduling is based on resource classes,
# especially for mixed hypervisor case with host_subset_size = 1.
# However enabling it will also make packing of VMs on hypervisors
# less dense even when scheduling weights are completely disabled.
#shuffle_best_same_weighed_hosts = false

请仔细考虑以下选项

[compute]

# This option will cause nova-compute to set itself to a disabled state
# if a certain number of consecutive build failures occur. This will
# prevent the scheduler from continuing to send builds to a compute
# service that is consistently failing. In the case of bare metal
# provisioning, however, a compute service is rarely the cause of build
# failures. Furthermore, bare metal nodes, managed by a disabled
# compute service, will be remapped to a different one. That may cause
# the second compute service to also be disabled, and so on, until no
# compute services are active.
# If this is not the desired behavior, consider increasing this value or
# setting it to 0 to disable this behavior completely.
#consecutive_build_service_disable_threshold = 10

在 ironic 部分中更改以下配置选项。替换

IRONIC_PASSWORD 为您在身份服务中为 ironic 用户选择的密码
IRONIC_NODE 为 ironic-api 节点的hostname 或 IP 地址
IDENTITY_IP 为身份服务器的 IP

[ironic]

# Ironic authentication type
auth_type=password

# Keystone API endpoint
auth_url=http://IDENTITY_IP:5000/v3

# Ironic keystone project name
project_name=service

# Ironic keystone admin name
username=ironic

# Ironic keystone admin password
password=IRONIC_PASSWORD

# Ironic keystone project domain
# or set project_domain_id
project_domain_name=Default

# Ironic keystone user domain
# or set user_domain_id
user_domain_name=Default

在计算服务的控制器节点上，重新启动 nova-scheduler 进程

Fedora/RHEL/CentOS:
  sudo systemctl restart openstack-nova-scheduler

Ubuntu:
  sudo service nova-scheduler restart

在计算服务的计算节点上，重新启动 nova-compute 进程

Fedora/RHEL/CentOS:
  sudo systemctl restart openstack-nova-compute

Ubuntu:
  sudo service nova-compute restart

配置计算服务以使用裸金属服务

配置计算服务以使用裸机服务¶

ironic 32.0.1.dev43