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4. nova

由 datahunter 在 一, 29/09/2014 - 16:14 發表

最後更新: 2014/10/07

 

目錄

  • 有關 package
  • Controller node 的設定
  • Compute node 的設定
  • To enable KVM explicitly
  • Nested KVM
  • Setting
  • Commands
  • quota setting

 

 

有關 package

 

# Compte node:

  • nova-api-metadata - used when you run in multi-host mode with nova-network installations
  • nova-compute - A worker daemon that creates and terminates virtual machine instances through hypervisor APIs ( libvirt for KVM or QEMU)
  • nova-network - it accepts networking tasks from the queue and performs tasks to manipulate the network

# Controllor node:

  • nova-api service - Accepts and responds to end user compute API calls (OpenStack Compute API, the Amazon EC2 API, and a special Admin API )
  • nova-scheduler - Takes a VM instance request from the queue and determines on which nova-compute host it should run
  • nova-conductor - Mediates interactions between nova-compute and the database
  • nova-dhcpbridge script - Tracks IP address leases and records them in the database by using the dnsmasq dhcp-script facility

# browser-based novnc clients

  • nova-consoleauth - Authorizes tokens for users that console proxies provide. ( M node )
  • nova-novncproxy - Provides a proxy for accessing running instances through a VNC connection. ( M node )
    * uses noVNC to provide VNC support through a web browser.
    * The proxies rely on nova-consoleauth to validate tokens
  • nova-xvpnvncproxy - A proxy for accessing running instances through a VNC connection. ( M node )
  • nova-cert - Manages x509 certificates. ( M node )

# Command-line clients and other interfaces

  • nova client. Enables users to submit commands as a tenant administrator or end user.
  • nova-manage client. Enables cloud administrators to submit commands.

# Other components

  • The queue service
  • SQL database

P.S.

它們全部都係 python 來

 

Controller node 的設定

 

# 安裝必要的 package

yum install openstack-nova-api openstack-nova-cert openstack-nova-conductor \
  openstack-nova-console openstack-nova-novncproxy openstack-nova-scheduler \
  python-novaclient

# 設定 database

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';
mysql> flush privileges;
mysql> exit

# 建立 DB 的 Tables

openstack-config --set /etc/nova/nova.conf \
  database connection mysql://nova:NOVA_DBPASS@controller_pri/nova

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

# 設定 Q Server

openstack-config --set /etc/nova/nova.conf DEFAULT rpc_backend qpid
openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname controller_pri

# 設定 vnc

openstack-config --set /etc/nova/nova.conf DEFAULT my_ip controller_pub
openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_listen controller_pub
openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_proxyclient_address controller_pub

# keystone

keystone user-create --name=nova --pass=NOVA_PASS [email protected]

+----------+----------------------------------+
| Property |              Value               |
+----------+----------------------------------+
|  email   |    [email protected]     |
| enabled  |               True               |
|    id    | b43b32b5a69c4b92a4da525eec73d612 |
|   name   |               nova               |
| username |               nova               |
+----------+----------------------------------+

keystone user-role-add --user=nova --tenant=service --role=admin

keystone service-create --name=nova --type=compute  --description="OpenStack Compute"

+-------------+----------------------------------+
|   Property  |              Value               |
+-------------+----------------------------------+
| description |        OpenStack Compute         |
|   enabled   |               True               |
|      id     | 15e5e2fbb97546759da99be4f66d0ccc |
|     name    |               nova               |
|     type    |             compute              |
+-------------+----------------------------------+

keystone endpoint-create \
  --service-id=$(keystone service-list | awk '/ compute / {print $2}') \
  --publicurl=http://controller_pub:8774/v2/%\(tenant_id\)s \
  --internalurl=http://controller_pri:8774/v2/%\(tenant_id\)s \
  --adminurl=http://controller_pri:8774/v2/%\(tenant_id\)s

+-------------+---------------------------------------------+
|   Property  |                    Value                    |
+-------------+---------------------------------------------+
|   adminurl  | http://controller_pri:8774/v2/%(tenant_id)s |
|      id     |       70a44eee093444929cef2c6212b75e39      |
| internalurl | http://controller_pri:8774/v2/%(tenant_id)s |
|  publicurl  | http://controller_pub:8774/v2/%(tenant_id)s |
|    region   |                  regionOne                  |
|  service_id |       15e5e2fbb97546759da99be4f66d0ccc      |
+-------------+---------------------------------------------+

# 設定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_pri:5000
openstack-config --set /etc/nova/nova.conf  keystone_authtoken auth_host controller_pri
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

# Start 有關 Service

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

# Verify your configuration

nova image-list

+--------------------------------------+------------------------------+--------+--------+
| ID                                   | Name                         | Status | Server |
+--------------------------------------+------------------------------+--------+--------+
| dff9056a-81d8-4a21-97ae-f8b6eb20302b | precise-server-cloudimg-i386 | ACTIVE |        |
+--------------------------------------+------------------------------+--------+--------+

 

Compute node 的設定

 

安裝

yum install openstack-nova-compute

設定

# 設定連過去 keystone

openstack-config --set /etc/nova/nova.conf database connection mysql://nova:NOVA_DBPASS@controller_pri/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_pri:5000
openstack-config --set /etc/nova/nova.conf keystone_authtoken auth_host controller_pri
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

 

# 設定 Q

openstack-config --set /etc/nova/nova.conf DEFAULT rpc_backend qpid
openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname controller_pri

 

# 設定 VNC

openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 192.168.123.72

openstack-config --set /etc/nova/nova.conf DEFAULT vnc_enabled True

# default value
# vnc_enabled=true
# vnc_keymap=en-us

openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_listen 0.0.0.0

# instanse 的 XML

    <graphics type='vnc' port='-1' autoport='yes' listen='0.0.0.0' keymap='en-us'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>

# compute node management_ip

openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_proxyclient_address 192.168.0.2

# 行 "nova get-vnc-console <instance> novnc" 時獲得的 link

openstack-config --set /etc/nova/nova.conf DEFAULT novncproxy_base_url  http://controller_pub:6080/vnc_auto.html

 

Proxy node:

nova-novncproxy services. Supports browser-based noVNC clients.

typically runs on the same machine as nova-api
(because it operates as a proxy between the public network and the private compute host network.)

ps aux 會見到

/usr/bin/python /usr/bin/nova-novncproxy --web /usr/share/novnc/

# By default

nova.conf:

novncproxy_host=0.0.0.0
novncproxy_port=6080

修改設定後要

/etc/init.d/openstack-nova-novncproxy restart

 

# 設定 image service

openstack-config --set /etc/nova/nova.conf DEFAULT glance_host controller_pri

 

# 設定用 libvirt - qemu (在 vm 內測試)

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

0

openstack-config --set /etc/nova/nova.conf libvirt virt_type qemu

 

# Start Service

service libvirtd start
service messagebus start
service openstack-nova-compute start

chkconfig libvirtd on
chkconfig messagebus on
chkconfig openstack-nova-compute on

 

To enable KVM explicitly

 

/etc/nova/nova.conf

#
# Options defined in nova.virt.driver
#

compute_driver=libvirt.LibvirtDriver

[libvirt]
#virt_type=qemu
libvirt_type=kvm

inject_password=true
inject_key=true

 

/etc/init.d/openstack-nova-compute restart

/etc/init.d/openstack-nova-api restart

 

Nested KVM

http://datahunter.org/nested_kvm

 

Setting

 

#
# Options defined in nova.virt.driver
#

compute_driver=nova.virt.libvirt.LibvirtDriver

# none. No storage provisioning occurs up front.
# space. Storage is fully allocated at instance start.

preallocate_images=none

 

# For per-compute-host cached images

image_cache_subdirectory_name=_base

# Should unused base images be removed?
# When set to True, the interval at which base images are removed are set with the following two settings.
# If set to False base images are never removed by Compute.

remove_unused_base_images=false

# image cache manager 多久行一次
image_cache_manager_interval=2400

# Unused unresized base images younger than this are not removed.
remove_unused_original_minimum_age_seconds=86400

# Unused resized base images younger than this are not removed.
remove_unused_resized_minimum_age_seconds=3600

# To see how the settings affect the deletion of a running instance
# check the directory where the images are stored:

ls -lash /var/lib/nova/instances/_base/

 

# 設定好後 restart 它

/etc/init.d/openstack-nova-compute restart

Command

 

http://datahunter.org/cmd_nova

 

flavors

 

Virtual hardware templates are called
( default install provides five flavors )

# Disk
mount of disk space in gigabytes

# Ephemeral
* 0 by default
Ephemeral disks offer machine local disk storage linked to the life cycle of a VM instance. When a VM is terminated, all data on the ephemeral disk is lost. Ephemeral disks are not included in any snapshots.

nova flavor-list

+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| ID | Name      | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
| 1  | m1.tiny   | 512       | 1    | 0         |      | 1     | 1.0         | True      |
| 2  | m1.small  | 2048      | 20   | 0         |      | 1     | 1.0         | True      |
| 3  | m1.medium | 4096      | 40   | 0         |      | 2     | 1.0         | True      |
| 4  | m1.large  | 8192      | 80   | 0         |      | 4     | 1.0         | True      |
| 5  | m1.xlarge | 16384     | 160  | 0         |      | 8     | 1.0         | True      |
+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+

nova flavor-show 1

+----------------------------+---------+
| Property                   | Value   |
+----------------------------+---------+
| OS-FLV-DISABLED:disabled   | False   |
| OS-FLV-EXT-DATA:ephemeral  | 0       |
| disk                       | 1       |
| extra_specs                | {}      |
| id                         | 1       |
| name                       | m1.tiny |
| os-flavor-access:is_public | True    |
| ram                        | 512     |
| rxtx_factor                | 1.0     |
| swap                       |         |
| vcpus                      | 1       |
+----------------------------+---------+

Usage:
nova flavor-create <name> <id> <ram> <disk> <vcpus>
                          
Default:          
--is-public yes
--rxtx-factor 1
--ephemeral 0

i.e.
nova flavor-create m1.test 11 512 10 1

 

Quota

 

# Options defined in nova.quota

quota_instances=10

quota_cores=4

quota_ram=51200

quota_floating_ips=3

quota_security_group_rules=20

quota_security_groups=10

quota_key_pairs=100

 

 

 

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