OpenStack-Icehouse（nova-network）多节点基础环境部署

内容列表

一、组件介绍

二、系统准备

三、Controller Node部署

    1.MySQL

    2.Qpid

    3.Glance

    4.Nova

    5.Horizon

四、Compute Node部署

    1.Nova-Compute

    2.Nova-Network

五、部署云主机

 

参考文档：

http://docs.openstack.org/icehouse/install-guide/install/yum/openstack-install-guide-yum-icehouse.pdf

 

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一、组件介绍

MySQL数据库：负责保存Openstack系统中的各类数据

Qpid:完成Openstack各组件间的消息交换工作

Keystone：用于租户与服务认证

Glance：负责提供创建虚拟机使用的操作系统镜像

   glance-api：负责接收云系统的镜像创建、删除和镜像数据服务

   glance-registry：负责云系统的镜像注册服务

Nova：（compute）管理虚拟机

   nova-api：负责接收来自Nova客户端或Horizon的控制指令并完成虚拟机创建、删除等管理工作

   nova-network：负责为虚拟机配置网络并分配IP地址

   nova-cert：负责来自EC2接口命令的用户身份提供认证服务

   nova-consoleauth、nova-novncproxy负责为来自Horizon的Web VNC管理页面提供认证与VNC服

   nova-scheduler：负责决定在哪台计算节点上创建虚拟机工作

Cinder：为云中虚拟机镜像提供存储服务

Swift：对象存储，一般存储虚拟机镜像、图片、存档备份等

Telemetry（Ceilometer）：提供云系统中计费功能、监控数据、云系统运行状况等

Orchestration（Heat）：利用模板，定制化的实现虚拟机预配置，类似于puppet

Trove：根据云中资源轻松扩展数据库资源使用

二、安装系统准备

操作系统：CentOS6.5_x86_64 minimal

1.禁用NetworkManager服务

service NetworkManager stop

chkconfig NetworkManager off

2.关闭selinux

setenforce 0

3.关闭防火墙

service iptables stop

4.安装NTP时间同步

yum install -y ntp

service ntpd start

chkconfig ntpd on

5.配置Icehouse和epel网络源

yum install -y http://repos.fedorapeople.org/repos/openstack/openstack-icehouse/rdo-release-icehouse-3.noarch.rpm http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

6.安装Openstack工具并更新系统

yum install -y openstack-utils openstack-selinux

yum upgrade -y && reboot 

7.配置网络

  7.1 Controller Node

7.1.1配置管理接口

DEVICE=eth0

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=192.168.1.11

NETMASK=255.255.255.0

GATEWAY=192.168.1.1

DNS1=192.168.1.1    

7.1.2配置hosts记录

     192.168.1.11 controlle

     192.168.1.31 compute1

7.2 Compute1 Node

  7.2.1配置管理接口

DEVICE=eth0

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=192.168.1.31

NETMASK=255.255.255.0

GATEWAY=192.168.1.1

DNS1=192.168.1.1   

7.2.2 配置外部接口

      DEVICE=eth1

TYPE=Ethernet

ONBOOT="yes"

BOOTPROTO="none"   

7.2.3配置hosts记录

192.168.1.11 controlle

    192.168.1.31 compute1

7.3 重启网卡

service network restart

7.4 测试网络连通性

ping -c 4 www.openstack.org

ping -c 4 controller

ping -c 4 compute1

三、Controller Node

1.MySQL数据库安装与配置

1.1安装Msyql

yum install -y mysql mysql-server MySQL-python

1.2修改配置文件

[mysqld]

bind-address= 192.168.1.11

default-storage-engine= innodb

collation-server= utf8_general_ci

init-connect= 'SET NAMES utf8'

character-set-server= utf8

1.3重启Mysql

service mysqld start

chkconfig mysqld on

1.4初始化Mysql并设置密码

mysql_install_db

mysql_secure_installation

2.消息中间件Qpid服务安装与配置

yum install -y qpid-cpp-server

2.1关闭身份认证

# vi /etc/qpidd.conf

auth=no

2.2重启qpidd服务

service qpidd start

chkconfig qpidd on

3.认证服务Keystone安装与配置

3.1安装

yum install -y openstack-keystone

3.2配置数据库

openstack-config --set /etc/keystone/keystone.conf \

database connection mysql://keystone:keystonepass@controller/keystone

3.3创建数据库并授权

# mysql -uroot -p

mysql> CREATE DATABASE keystone;

mysql> GRANT ALL PRIVILEGES ON keystone.* TO'keystone'@'localhost' \

IDENTIFIEDBY 'keystonepass';

mysql> GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'%' \

IDENTIFIEDBY 'keystonepass';

mysql> exit

当然，如果你觉得每次创建数据库并授权比较麻烦，可以一次做完！

# vi createdb.sh

CREATE DATABASE keystone;

GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'localhost' IDENTIFIED BY 'keystonepass';

GRANT ALL PRIVILEGES ON keystone.* TO 'keystone'@'%' IDENTIFIED BY 'keystonepass';

CREATE DATABASE glance;

GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' IDENTIFIED BY 'glancepass';

GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' IDENTIFIED BY 'glancepass';

CREATE DATABASE nova;

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

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

CREATE DATABASE neutron;

GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'localhost' IDENTIFIED BY 'neutronpass';

GRANT ALL PRIVILEGES ON neutron.* TO 'neutron'@'%' IDENTIFIED BY 'neutronpass';

CREATE DATABASE dash;

GRANT ALL PRIVILEGES ON dash.* TO 'dash'@'%' IDENTIFIED BY 'dashpass';

GRANT ALL PRIVILEGES ON dash.* TO 'dash'@'localhost' IDENTIFIED BY 'dashpass';

CREATE DATABASE cinder;

GRANT ALL PRIVILEGES ON cinder.* TO 'cinder'@'localhost' IDENTIFIED BY 'cinderpass';

GRANT ALL PRIVILEGES ON cinder.* TO 'cinder'@'%' IDENTIFIED BY 'cinderpass';

# mysql -uroot -p123.com < createdb.sh

3.4导入数据库

keystone-manage db_sync

3.5生成字符串秘钥并添加到配置文件

ADMIN_TOKEN=$(openssl rand -hex 10)

echo $ADMIN_TOKEN

openstack-config --set /etc/keystone/keystone.conf DEFAULT \

admin_token $ADMIN_TOKEN

3.6默认keystone使用PKI令牌，创建签名秘钥和证书

keystone-manage pki_setup --keystone-user keystone --keystone-group keystone

chown -R keystone:keystone /etc/keystone/ssl

chmod -R o-rwx /etc/keystone/ssl

chown keystone.keystone /var/log/keystone/keystone.log

3.7重启服务

service openstack-keystone start

chkconfig openstack-keystone on

3.8定期清理过期的令牌，提高性能

(crontab -l 2>&1 | grep -q token_flush) || \

echo '@hourly /usr/bin/keystone-manage token_flush >/var/log/keystone/keystone-tokenflush.log 2>&1' >> /var/spool/cron/root

3.9设置令牌及服务位置环境变量

export OS_SERVICE_TOKEN=$ADMIN_TOKEN

export OS_SERVICE_ENDPOINT=http://controller:35357/v2.0

3.10创建admin用户、角色和租户

#创建管理员用户

keystone user-create --name=admin --pass=admin [email protected]

#创建管理员角色

keystone role-create --name=admin

#为管理员创建租户

keystone tenant-create --name=admin --description="AdminTenant"

#将角色添加到用户

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

keystone user-role-add --user=admin --role=_member_ --tenant=admin

3.11创建service租户

keystone tenant-create --name=service --description="Service Tenant"

3.12创建keystone标识服务

keystone service-create --name=keystone --type=identity \

--description="OpenStackIdentity"

3.13创建服务端点，指定API的URL

keystone endpoint-create \

--service-id=$(keystone service-list | awk '/ identity / {print$2}') \

--publicurl=http://controller:5000/v2.0 \

--internalurl=http://controller:5000/v2.0 \

--adminurl=http://controller:35357/v2.0

3.14取消变量

unset OS_SERVICE_TOKEN OS_SERVICE_ENDPOINT

3.15测试身份认证

# keystone --os-username=admin --os-password=admin \

--os-auth-url=http://controller:35357/v2.0 token-get

# keystone --os-username=admin --os-password=admin \

--os-tenant-name=admin --os-auth-url=http://controller:35357/v2.0 token-get

3.16设置环境变量，也可以写在.bash_profile

# vi /root/admin-openrc.sh

export OS_USERNAME=admin

export OS_PASSWORD=admin

export OS_TENANT_NAME=admin

export OS_AUTH_URL=http://controller:35357/v2.0

# source admin-openrc.sh

3.17验证是否授权成功

keystone token-get

keystone user-list

keystone user-role-list --user admin --tenant admin

keystone --os-password admin service-list

3.18安装client通过http访问各组件客户端

yum install -y python-keystoneclient python-glanceclient python-novaclient python-swiftclient python-neutronclient python-cinderclient 

4.镜像服务Glance安装与配置

4.1安装

yum install -y openstack-glance

现在启动glance-api，要不然会可能后面启动不起来。

service openstack-glance-api start

4.2配置数据库及qpid

openstack-config --set /etc/glance/glance-api.conf database \
connection mysql://glance:glancepass@controller/glance
openstack-config --set /etc/glance/glance-registry.conf database \
connection mysql://glance:glancepass@controller/glance
openstack-config --set /etc/glance/glance-api.conf DEFAULT rpc_backend qpid
openstack-config --set /etc/glance/glance-api.conf DEFAULT qpid_hostname controller

4.3创建数据库

# mysql -uroot -p

mysql> CREATE DATABASE glance;

mysql> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' \

IDENTIFIEDBY 'glancepass';

mysql> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' \

IDENTIFIEDBY 'glancepass';

mysql> exit

4.4导入数据库

glance-manage db_sync

4.5创建glance用户并加入角色admin

keystone user-create --name=glance --pass=glance [email protected]

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

4.6配置认证信息

openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_uri http://controller:5000
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_host controller
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_port 35357
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_protocol http
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken admin_tenant_name service
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken admin_user glance
openstack-config --set /etc/glance/glance-api.conf keystone_authtoken admin_password glance
openstack-config --set /etc/glance/glance-api.conf paste_deploy flavor keystone

openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_uri http://controller:5000
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_host controller
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_port 35357
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_protocol http
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken admin_tenant_name service
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken admin_user glance
openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken admin_password glance
openstack-config --set /etc/glance/glance-registry.conf paste_deploy flavor keystone

4.7创建glance标识服务

keystone service-create --name=glance --type=p_w_picpath --description="OpenStackImage Service"

4.8创建Glance API接口URL

keystone endpoint-create \
--service-id=$(keystone service-list | awk '/ p_w_picpath / {print$2}') \
--publicurl=http://controller:9292  \
--internalurl=http://controller:9292  \
--adminurl=http://controller:9292

4.9启动glance服务

service openstack-glance-api restart
service openstack-glance-registry start
chkconfig openstack-glance-api on
chkconfig openstack-glance-registry on

4.10上传测试镜像

wget http://cdn.download.cirros-cloud.net/0.3.2/cirros-0.3.2-x86_64-disk.img

glance p_w_picpath-create --name "cirros-0.3.2-x86_64" --disk-format qcow2 \

--container-format bare --is-public True --progress < cirros-0.3.2-x86_64-disk.img

4.11查看上传镜像状态

# glance p_w_picpath-list

[root@controller~]# glance p_w_picpath-list

+--------------------------------------+---------------------+-------------+------------------+-----------+--------+

| ID                                 | Name               | Disk Format | Container Format | Size     | Status |

+--------------------------------------+---------------------+-------------+------------------+-----------+--------+

|de8cfa34-2657-4d9c-bc58-19fb11455cbb | cirros-0.3.2-x86_64 | qcow2      | bare             | 13167616 | active |

+--------------------------------------+---------------------+-------------+------------------+-----------+--------+

5.计算服务Nova API安装与配置

5.1安装

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

5.2配置数据库

openstack-config --set /etc/nova/nova.conf database \

connection mysql://nova:novapass@controller/nova

5.3配置Qpid及VNC

openstack-config --set /etc/nova/nova.conf DEFAULT rpc_backend qpid
openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname controller
openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 192.168.1.11
openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_listen 192.168.1.11
openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_proxyclient_address
192.168.1.11

5.4创建数据库

mysql -uroot -p

mysql> CREATE DATABASE nova;

mysql> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' \

IDENTIFIEDBY 'novapass';

mysql> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' \

IDENTIFIEDBY 'novapass';

mysql> exit

5.5导入数据库

nova-manage db sync

5.6创建nova用户并加入角色admin

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

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

5.7配置认证信息

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

5.8创建nova服务标识

keystone service-create --name=nova --type=compute --description="OpenStackCompute"

5.9创建Nova API接口URL

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

5.10启动相关服务

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-certon
chkconfig openstack-nova-consoleauth on
chkconfig openstack-nova-scheduler on
chkconfig openstack-nova-conductor on
chkconfig openstack-nova-novncproxy on

5.11查看镜像状态

# nova p_w_picpath-list

[root@controller~]# nova p_w_picpath-list

+--------------------------------------+---------------------+--------+--------+

| ID                                 | Name               | Status | Server |

+--------------------------------------+---------------------+--------+--------+

|de8cfa34-2657-4d9c-bc58-19fb11455cbb | cirros-0.3.2-x86_64 | ACTIVE |       |

+--------------------------------------+---------------------+--------+--------+

5.11配置控制节点使用nova网络

openstack-config --set /etc/nova/nova.conf DEFAULT network_api_class nova.network.api.API

openstack-config --set /etc/nova/nova.conf DEFAULT security_group_api nova

5.12重启服务

service openstack-nova-api restart
service openstack-nova-scheduler restart
service openstack-nova-conductor restart

5.13创建网络（一般创建的网络不能与宿主机在同一网段，避免冲突）

# source admin-openrc.sh

nova network-create admin-net --bridge br100 --multi-host T --fixed-range-v4 192.168.1.0/24

[root@controller~]# nova net-list

+--------------------------------------+----------+----------------+

| ID                                 | Label    | CIDR             |

+--------------------------------------+----------+----------------+

|5eb05667-ed6b-4cd3-a1d1-b6cc1903ccfa | admin-net | 192.168.1.0/24 |

+--------------------------------------+----------+----------------+

6.Web页面dashboard服务安装与配置

6.1安装

yum install -y memcached python-memcached mod_wsgi openstack-dashboard

6.2配置用memcached来缓存dashboard，并设置允许外部访问与配置数据库

# vi /etc/openstack-dashboard/local_settings
CACHES = {
'default':{
'BACKEND':'django.core.cache.backends.memcached.MemcachedCache',
'LOCATION': '127.0.0.1:11211'
}
}
########### config databases ##############
SESSION_ENGINE = 'django.core.cache.backends.db.DatabaseCache'
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'dash',
'USER': 'dash',
'PASSWORD': 'DASH_DBPASS',
'HOST': '192.168.1.11',
'default-character-set': 'utf8'
 }
}
ALLOWED_HOSTS= ['192.168.1.11', 'my-desktop']
OPENSTACK_HOST= "controller"

############可选：也可以使用redis做缓存#############

SESSION_ENGINE = 'django.contrib.sessions.backends.cache'
CACHES = {
"default": {
"BACKEND": "redis_cache.cache.RedisCache",
"LOCATION": "127.0.0.1:6379:1",
"OPTIONS": {
"CLIENT_CLASS":"redis_cache.client.DefaultClient",
 }
}

6.3创建数据库

mysql -u root -p

mysql> CREATE DATABASE dash;

mysql> GRANT ALL PRIVILEGES ON dash.* TO 'dash'@'%'IDENTIFIED BY

'DASH_DBPASS';

mysql> GRANT ALL PRIVILEGES ON dash.* TO 'dash'@'localhost'IDENTIFIED BY

'DASH_DBPASS';

mysql> exit

6.4导入数据库

/usr/share/openstack-dashboard/manage.py syncdb

6.5启动相关服务

service httpd start
service memcached start
chkconfig httpd on
chkconfig memcached on

6.6访问dashboard

http://192.168.1.11/dashboard

四、Compute Node

1.安装MySQL-python

yum install-y MySQL-python

2.计算服务Nova-Compute安装与配置

2.1安装计算服务

yum install -y openstack-nova-compute

2.2配置数据库

openstack-config --set /etc/nova/nova.conf database connection mysql://nova:novapass@controller/nova

2.3配置认证信息

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

2.4配置Qpid

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

openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname controller

2.5配置计算服务提供远程控制台访问实例

openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 192.168.1.31
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 192.168.1.31
openstack-config --set /etc/nova/nova.conf DEFAULT novncproxy_base_url http://192.168.1.11:6080/vnc_auto.html

2.6如果系统不支持硬件虚拟化则配置libvirt为qemu，生产环境是kvm

# egrep -c '(vmx|svm)' /proc/cpuinfo  #查看是否支持虚拟化

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

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

2.7启动相关服务

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

3.Nova-Network服务安装与配置

3.1安装

yum install -y openstack-nova-network openstack-nova-api

3.2配置FlatDHCP

openstack-config --set /etc/nova/nova.conf DEFAULT network_api_class nova.network.api.API
openstack-config --set /etc/nova/nova.conf DEFAULT security_group_api nova
openstack-config --set /etc/nova/nova.conf DEFAULTnetwork_managernova.network.manager.FlatDHCPManager
openstack-config --set /etc/nova/nova.conf DEFAULT \
firewall_driver nova.virt.libvirt.firewall.IptablesFirewallDriver
openstack-config --set /etc/nova/nova.conf DEFAULT network_size 254
openstack-config --set /etc/nova/nova.conf DEFAULT allow_same_net_traffic False
openstack-config --set /etc/nova/nova.conf DEFAULT multi_host True
openstack-config --set /etc/nova/nova.conf DEFAULT send_arp_for_ha True
openstack-config --set /etc/nova/nova.conf DEFAULT share_dhcp_addressTrue
openstack-config --set /etc/nova/nova.conf DEFAULT force_dhcp_release True
openstack-config --set /etc/nova/nova.conf DEFAULT flat_network_bridge br100
openstack-config --set /etc/nova/nova.conf DEFAULT flat_interface eth1
openstack-config --set /etc/nova/nova.conf DEFAULT public_interface eth0

3.3启动相关服务

service openstack-nova-network start
service openstack-nova-metadata-api start
chkconfig openstack-nova-network on
chkconfig openstack-nova-metadata-api on

3.4查看服务与连接Compute节点是否正常

[root@controller~]# nova-manage service list

Binary          Host                   Zone            Status     StateUpdated_At

nova-consoleauthcontroller            internal        enabled    :-)   2014-07-04 18:17:15

nova-cert       controller            internal        enabled    :-)   2014-07-04 18:17:11

nova-conductor  controller            internal        enabled    :-)   2014-07-04 18:17:15

nova-console    controller            internal        enabled    :-)   2014-07-04 18:17:11

nova-scheduler  controller            internal        enabled    :-)   2014-07-04 18:17:16

nova-compute    compute1              nova            enabled    :-)   2014-07-04 18:17:13

nova-network    compute1              internal        enabled    :-)   2014-07-04 18:17:13

3.5查看各组件服务状态，没启动要手动重启下

# cd /etc/init.d/; for i in $( ls openstack-* ); do service $i status; done

3.6常见故障解决之nova-api已死，pid还存在（openstack-nova-api dead but pid file exists）

故障现象：dashboard无法访问

故障分析：查看日志，tail /var/log/nova/api.log发现

2014-07-15 12:16:23.714 3046 ERROR nova.wsgi [-] Could not bind to 0.0.0.0:8775

2014-07-15 12:16:23.715 3046 CRITICAL nova [-] error: [Errno 98] Address already in use

故障解决：可以看出8775已经监听了，但为什么起不起来呢，这就不得而知了，我们可以通过kill这个进程再重启服务，即可解决！

# netstat -tupln | grep 8775

tcp        0      0 0.0.0.0:8775   0.0.0.0:*           LISTEN      3142/python  

# kill 3142

# service openstack-nova-api start

五、创建云主机

1.1创建控制台无密码登陆虚拟机密钥

# ssh-keygen （一直回车）

# nova keypair-add --pub-key ~/.ssh/id_rsa.pub admin-key

1.2查看上传的密钥对

# nova keypair-list

1.3查看创建主机类型，也就是要分配主机资源模板

# nova flavor-list

[root@controller~]# 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      |

+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+

1.3设置default默认访问规则，允许ping和22访问

# nova secgroup-add-rule default icmp -1 -1 0.0.0.0/0

# nova secgroup-add-rule default tcp 22 22 0.0.0.0/0

1.4创建虚拟机

# nova boot --flavor m1.tiny --p_w_picpath cirros-0.3.2-x86_64 --nic net-id=ADMIN_NET_ID \

--security-group default --key-name admin-key cirros

1.5查看云主机状态

[root@controller~]# nova list

+---------------+--------+--------+------------+-------------+----------------------+

| ID            | Name   | Status | Task State |Power State | Networks             |

+---------------+--------+--------+------------+-------------+----------------------+

|096123ba-dacf-4d9a-bfe7-c90901cb3d14 | crrios | ACTIVE | -  | Running| admin-net=192.168.1.2 |

+---------------+--------+--------+------------+-------------+----------------------+

1.6登陆Horizon控制台查看云主机

CentOS6.5磁盘镜像下载地址：

http://repos.fedorapeople.org/repos/openstack/guest-p_w_picpaths/centos-6.5-20140117.0.x86_64.qcow2

以上基本的Openstack I版部署完毕，接触不久，有什么问题，可以一起交流，有时间会部署块存储Cinder、对象存储Swift、Neutron等，到时候会发布博客与大家分享。

刚接触的朋友会遇到各种各样的问题，也是很正常的，因为组件较多，逻辑架构比较复杂，如果部署的是Neutron网络，会更容易出错，为了避免低级的错误发生，在看网上教程时候先多去揣摩每次要执行命令的目的，多动手部署几次，一次不行两次，相信20次以上，Openstack你已经有很深的认识了。

博客地址：http://lizhenliang.blog.51cto.com