2014-08-17

在Windows上的VMWare CentOS Linux上安裝OpenStack IceHouse 步驟6 Nova安裝

Nova 透過 hypervisor APIs, 如XenServer/XCP 的XenAPI, KVM或QEMU 的 libvirt,  VMware的VMwareAPI來啟動及結束virtual machine instances.
Compute service

 Compute service

The Compute service is a cloud computing fabric controller, which is the main part of an IaaS system. Use it to host and manage cloud computing systems. The main modules are implemented in Python.
Install Compute controller services

 Install Compute controller services

Compute is a collection of services that enable you to launch virtual machine instances. You can configure these services to run on separate nodes or the same node. In this guide, most services run on the controller node and the service that launches virtual machines runs on a dedicated compute node. This section shows you how to install and configure these services on the controller node.
  1. Install the Compute packages necessary for the controller node.
    # yum install openstack-nova-api openstack-nova-cert openstack-nova-conductor \
      openstack-nova-console openstack-nova-novncproxy openstack-nova-scheduler \
      python-novaclient
  2. Compute stores information in a database. In this guide, we use a MySQL database on the controller node. Configure Compute with the database location and credentials. Replace NOVA_DBPASS with the password for the database that you will create in a later step.
    # openstack-config --set /etc/nova/nova.conf \
      database connection mysql://nova:NOVA_DBPASS@controller/nova
  3. Set these configuration keys to configure Compute to use the Qpid message broker:
    # openstack-config --set /etc/nova/nova.conf \
      DEFAULT rpc_backend qpid
    # openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname controller
  4. Set the my_ip, vncserver_listen, and vncserver_proxyclient_address configuration options to the management interface IP address of the controller node:
    # openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 10.0.0.11
    # openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_listen 10.0.0.11
    # openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_proxyclient_address 10.0.0.11
  5. Use the password you created previously to log in as root. Create a nova database user:
    $ mysql -u root -p
    mysql> CREATE DATABASE nova;
    mysql> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' \
    IDENTIFIED BY 'NOVA_DBPASS';
    mysql> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' \
    IDENTIFIED BY 'NOVA_DBPASS';
  6. Create the Compute service tables:
    # su -s /bin/sh -c "nova-manage db sync" nova
  7. Create a nova user that Compute uses to authenticate with the Identity Service. Use the service tenant and give the user the admin role:
    $ keystone user-create --name=nova --pass=NOVA_PASS --email=nova@example.com
    $ keystone user-role-add --user=nova --tenant=service --role=admin
  8. Configure Compute to use these credentials with the Identity Service running on the controller. Replace NOVA_PASS with your Compute password.(照打不要改較方便)
    # openstack-config --set /etc/nova/nova.conf DEFAULT auth_strategy keystone
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_uri http://controller:5000
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_host controller
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_protocol http
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_port 35357
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_user nova
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_tenant_name service
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_password NOVA_PASS
  9. You must register Compute with the Identity Service so that other OpenStack services can locate it. Register the service and specify the endpoint:
    $ keystone service-create --name=nova --type=compute \
      --description="OpenStack Compute"
    $ keystone endpoint-create \
      --service-id=$(keystone service-list | awk '/ compute / {print $2}') \
      --publicurl=http://controller:8774/v2/%\(tenant_id\)s \
      --internalurl=http://controller:8774/v2/%\(tenant_id\)s \
      --adminurl=http://controller:8774/v2/%\(tenant_id\)s
  10. Start Compute services and configure them to start when the system boots:
    # service openstack-nova-api start
    # service openstack-nova-cert start
    # service openstack-nova-consoleauth start
    # service openstack-nova-scheduler start
    # service openstack-nova-conductor start
    # service openstack-nova-novncproxy start
    # chkconfig openstack-nova-api on
    # chkconfig openstack-nova-cert on
    # chkconfig openstack-nova-consoleauth on
    # chkconfig openstack-nova-scheduler on
    # chkconfig openstack-nova-conductor on
    # chkconfig openstack-nova-novncproxy on
  11. To verify your configuration, list available images:
    $ nova image-list
    +--------------------------------------+---------------------+--------+--------+
    | ID                                   | Name                | Status | Server |
    +--------------------------------------+---------------------+--------+--------+
    | acafc7c0-40aa-4026-9673-b879898e1fc2 | cirros-0.3.2-x86_64 | ACTIVE |        |
    +--------------------------------------+---------------------+--------+--------+

 Configure a compute node

After you configure the Compute service on the controller node, you must configure another system as a compute node. The compute node receives requests from the controller node and hosts virtual machine instances. You can run all services on a single node, but the examples in this guide use separate systems. This makes it easy to scale horizontally by adding additional Compute nodes following the instructions in this section.
The Compute service relies on a hypervisor to run virtual machine instances. OpenStack can use various hypervisors, but this guide uses KVM.
  1. Install the Compute packages:
    # yum install openstack-nova-compute
  2. Edit the /etc/nova/nova.conf configuration file:
    # openstack-config --set /etc/nova/nova.conf database connection mysql://nova:NOVA_DBPASS@controller/nova
    # openstack-config --set /etc/nova/nova.conf DEFAULT auth_strategy keystone
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_uri http://controller:5000
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_host controller
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_protocol http
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_port 35357
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_user nova
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_tenant_name service
    # openstack-config --set /etc/nova/nova.conf keystone_authtoken admin_password NOVA_PASS
  3. Configure the Compute service to use the Qpid message broker by setting these configuration keys:
    # openstack-config --set /etc/nova/nova.conf \
      DEFAULT rpc_backend qpid
    # openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname controller
  4. Configure Compute to provide remote console access to instances.
    # openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 10.0.0.31
    # openstack-config --set /etc/nova/nova.conf DEFAULT vnc_enabled True
    # openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_listen 0.0.0.0
    # openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_proxyclient_address 10.0.0.31
    # openstack-config --set /etc/nova/nova.conf \
      DEFAULT novncproxy_base_url http://controller:6080/vnc_auto.html
  5. Specify the host that runs the Image Service.
    # openstack-config --set /etc/nova/nova.conf DEFAULT glance_host controller
  6. You must determine whether your system's processor and/or hypervisor support hardware acceleration for virtual machines.
    Run the following command:
    $ egrep -c '(vmx|svm)' /proc/cpuinfo
    If this command returns a value of one or greater, your system supports hardware acceleration which typically requires no additional configuration.
    (如果上個指令結果為零, 則我們要執行下一指令. 以QEMU來取代KVM)   If this command returns a value of zero, your system does not support hardware acceleration and you must configure libvirt to use QEMU instead of KVM.
    1. Run the following command:
      # openstack-config --set /etc/nova/nova.conf libvirt virt_type qemu
  7. Start the Compute service and configure it to start when the system boots:
    # service libvirtd start
    # service messagebus start
    # chkconfig libvirtd on
    # chkconfig messagebus on
    # service openstack-nova-compute start
    # chkconfig openstack-nova-compute on

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