openstack setup demo Compute service

本文包含以下部分

• Compute service overview
• Install and configure controller node

• Prerequisites
• Install and configure components
• Finalize installation

• Install and configure a compute node

• Install and configure components
• Finalize installation

• Verify operation

Compute service overview

Compute service在openstack中的作用比较复杂，大致模块和功能如下：

nova-api service
接受并响应用户的请求

nova-api-metadata service
处理metadata请求

nova-compute service
是一个worker daemon。会调用hypervisor api来创建删除vm等。

nova-scheduler service
接受vm的请求，并分发给compute service

nova-conductor module
目前的作用是compute service和database的一个中间层，不要把它和compute service部署在同一个机器上。

nova-network worker daemon
跟nova-compute service差不多，从queue中接受task并执行。比如配置bridge和iptable。

nova-consoleauth daemon
Authorizes tokens for users that console proxies provide.

nova-novncproxy daemon
Provides a proxy for accessing running instances through a VNC connection. Supports browser-based novnc clients.

nova-novncproxy daemon
Provides a proxy for accessing running instances through a SPICE connection. Supports browser-based HTML5 client.

nova-xvpvncproxy daemon
Provides a proxy for accessing running instances through a VNC connection. Supports an OpenStack-specific Java client.

Install and configure controller node

prerequisite

创建db

mysql -u root -p

CREATE DATABASE nova_api;
CREATE DATABASE nova;

GRANT ALL PRIVILEGES ON nova_api.* TO 'nova'@'localhost' 
  IDENTIFIED BY 'NOVA_DBPASS';
GRANT ALL PRIVILEGES ON nova_api.* TO 'nova'@'%' 
  IDENTIFIED BY 'NOVA_DBPASS';

GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' 
  IDENTIFIED BY 'NOVA_DBPASS';
GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' 
  IDENTIFIED BY 'NOVA_DBPASS';

设置keystone

. admin-openrc

# 创建用户
openstack user create --domain default --password-prompt nova
# 在service project中为nova用户添加admin
openstack role add --project service --user nova admin
# 创建compute service
openstack service create --name nova --description "OpenStack Compute" compute
# 创建end points
openstack endpoint create --region RegionOne compute public http://controller01:8774/v2.1/%(tenant_id)s
openstack endpoint create --region RegionOne compute internal http://controller01:8774/v2.1/%(tenant_id)s
openstack endpoint create --region RegionOne compute admin http://controller01:8774/v2.1/%(tenant_id)s

Install and configure components

yum install openstack-nova-api openstack-nova-conductor 
  openstack-nova-console openstack-nova-novncproxy 
  openstack-nova-scheduler

编辑 /etc/nova/nova.conf

[DEFAULT]
...
enabled_apis = osapi_compute,metadata
rpc_backend = rabbit
auth_strategy = keystone
my_ip = 10.79.148.84
use_neutron = True
firewall_driver = nova.virt.firewall.NoopFirewallDriver

[api_database]
...
connection = mysql+pymysql://nova:NOVA_DBPASS@controller01/nova_api

[database]
...
connection = mysql+pymysql://nova:NOVA_DBPASS@controller01/nova

[oslo_messaging_rabbit]
...
rabbit_host = controller01
rabbit_userid = openstack
rabbit_password = RABBIT_PASS

[keystone_authtoken]
...
auth_uri = http://controller01:5000
auth_url = http://controller01:35357
memcached_servers = controller01:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = nova

[vnc]
...
vncserver_listen = $my_ip
vncserver_proxyclient_address = $my_ip

[glance]
...
api_servers = http://controller01:9292

[oslo_concurrency]
...
lock_path = /var/lib/nova/tmp

初始化compute database

su -s /bin/sh -c "nova-manage api_db sync" nova
su -s /bin/sh -c "nova-manage db sync" nova

Finalize installation

systemctl enable 
    openstack-nova-api.service 
    openstack-nova-consoleauth.service 
    openstack-nova-scheduler.service 
    openstack-nova-conductor.service 
    openstack-nova-novncproxy.service
systemctl start 
    openstack-nova-api.service 
    openstack-nova-consoleauth.service 
    openstack-nova-scheduler.service 
    openstack-nova-conductor.service 
    openstack-nova-novncproxy.service

Install and configure a compute node

Install and configure components

yum install openstack-nova-compute

编辑 /etc/nova/nova.conf

[DEFAULT]
...
rpc_backend = rabbit
auth_strategy = keystone
my_ip = 10.79.148.86
use_neutron = True
firewall_driver = nova.virt.firewall.NoopFirewallDriver

[oslo_messaging_rabbit]
...
rabbit_host = controller01
rabbit_userid = openstack
rabbit_password = RABBIT_PASS

[keystone_authtoken]
...
auth_uri = http://controller01:5000
auth_url = http://controller01:35357
memcached_servers = controller01:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = nova

[vnc]
...
enabled = True
vncserver_listen = 0.0.0.0
vncserver_proxyclient_address = $my_ip
novncproxy_base_url = http://controller01:6080/vnc_auto.html

[glance]
...
api_servers = http://controller01:9292

[oslo_concurrency]
...
lock_path = /var/lib/nova/tmp

Finalize installation

判断一下我们的硬件是否支持 hardware acceleration for virtual machines

egrep -c '(vmx|svm)' /proc/cpuinfo

如果返回0，说明不支持，则需要配置 libvirt 使用qeum 而不是kvm。
编辑 /etc/nova/nova.conf

[libvirt]
...
virt_type = qemu

启动libvirt 和 nova compute 并设置开机启动

systemctl enable libvirtd.service openstack-nova-compute.service
systemctl start libvirtd.service openstack-nova-compute.service

Verify operation

. admin.openrc

openstack compute service list

改名了应该能看到类似如下输出

+----+--------------------+------------+----------+---------+-------+----------------------------+
| Id | Binary             | Host       | Zone     | Status  | State | Updated At                 |
+----+--------------------+------------+----------+---------+-------+----------------------------+
|  1 | nova-consoleauth   | controller | internal | enabled | up    | 2016-02-09T23:11:15.000000 |
|  2 | nova-scheduler     | controller | internal | enabled | up    | 2016-02-09T23:11:15.000000 |
|  3 | nova-conductor     | controller | internal | enabled | up    | 2016-02-09T23:11:16.000000 |
|  4 | nova-compute       | compute1   | nova     | enabled | up    | 2016-02-09T23:11:20.000000 |
+----+--------------------+------------+----------+---------+-------+----------------------------+