nova服务的使用-世界杯夺冠次数-世界杯亚洲区积分榜_c罗世界杯

案例准备Nova服务.mp4

1. 规划节点

节点规划见表1。

表1 节点规划

主机名

节点

10.24.195.113

controller

IaaS-allinone

2. 基础准备

使用Centos7.9云主机搭建的OpenStack平台作为实验节点。

案例实施

1. 创建flavor类型

flavor类型为OpenStack在创建云主机时需要提供的云主机大小类型，云主机的资源大小可使用不同的flavor类型来进行定义。

（1）创建flavor类型

[root@controller ~]# openstack help flavor create

usage: openstack flavor create [-h] [-f {json,shell,table,value,yaml}]

[-c COLUMN] [--max-width ]

[--fit-width] [--print-empty] [--noindent]

[--prefix PREFIX] [--id ] [--ram ]

[--disk ] [--ephemeral ]

[--swap ] [--vcpus ]

[--rxtx-factor ] [--public | --private]

[--property ] [--project ]

[--project-domain ]

Create new flavor

使用命令创建一个flavor，10G的硬盘大小，512M内存，1颗vCPU，ID为10，名称为centos。命令如下：

[root@controller ~]# source /etc/keystone/admin-openrc.sh

[root@controller ~]# openstack flavor create --disk 10 --ram 512 --vcpus 1 --id 10 centos

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

| Field | Value |

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

| OS-FLV-DISABLED:disabled | False |

| OS-FLV-EXT-DATA:ephemeral | 0 |

| disk | 10 |

| id | 10 |

| name | centos |

| os-flavor-access:is_public | True |

| properties | |

| ram | 512 |

| rxtx_factor | 1.0 |

| swap | |

| vcpus | 1 |

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

（2）查看flavor类型

使用“openstack flavor list”命令查看flavor类型列表，命令如下：

[root@controller ~]# openstack flavor list

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

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

| 1 | m1.tiny | 512 | 10 | 0 | 1 | True |

| 10 | centos | 512 | 10 | 0 | 1 | True |

| 2 | m1.small | 1024 | 20 | 0 | 1 | True |

| 3 | m1.medium | 2048 | 40 | 0 | 2 | True |

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

也可以使用“openstack flavor show”命令查看具体的flavor类型的详细信息。命令格式如下：

[root@controller ~]# openstack help flavor show

usage: openstack flavor show [-h] [-f {json,shell,table,value,yaml}]

[-c COLUMN] [--max-width ] [--fit-width]

[--print-empty] [--noindent] [--prefix PREFIX]

通过命令查看创建的“centos”的flavor类型详细信息。命令如下：

[root@controller ~]# openstack flavor show centos

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

| Field | Value |

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

| OS-FLV-DISABLED:disabled | False |

| OS-FLV-EXT-DATA:ephemeral | 0 |

| access_project_ids | None |

| disk | 10 |

| id | 10 |

| name | centos |

| os-flavor-access:is_public | True |

| properties | |

| ram | 512 |

| rxtx_factor | 1.0 |

| swap | |

| vcpus | 1 |

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

2. 访问安全组

访问安全组为是OpenStack提供给云主机的一个访问策略控制组，通过安全组中的策略可以控制云主机的出入访问规则。

（1）查看访问安全组

使用命令“openstack security group list”可以查看当前所创建的访问安全组列表。命令如下：

[root@controller ~]#openstack security group list

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

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

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

“default”为OpenStack平台自带的安全组，通过命令可以查看安全组中的安全规则，命令如下：

[root@controller ~]# openstack security group rule list default

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

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

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

在安全规则的列表中，不能看出每条规则的具体策略，通过使用命令“openstack security group rule show”查看任意规则的详细信息。命令如下：

[root@controller ~]# openstack security group rule show 7aa363c8-5df3-4ce3-a775-9e453f086c87

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

| Field | Value |

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

| created_at | 2022-02-10T03:21:40Z |

| description | None |

| direction | ingress |

| ether_type | IPv6 |

| id | 7aa363c8-5df3-4ce3-a775-9e453f086c87 |

| location | cloud='', project.domain_id=, project.domain_name='000000', project.id='1776912d52a7444d8b2d09eb86e8d1d9', project.name='admin', region_name='', zone= |

| name | None |

| port_range_max | None |

| port_range_min | None |

| project_id | 1776912d52a7444d8b2d09eb86e8d1d9 |

| protocol | None |

| remote_group_id | 896ce430-21f8-4673-8110-afce97e43715 |

| remote_ip_prefix | ::/0 |

| revision_number | 0 |

| security_group_id | 896ce430-21f8-4673-8110-afce97e43715 |

| tags | [] |

| updated_at | 2022-02-10T03:21:40Z |

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

（2）创建访问安全组

创建一个新的安全组，命令格式如下：

[root@controller ~]# openstack help security group create

usage: openstack security group create [-h] [-f {json,shell,table,value,yaml}]

[-c COLUMN] [--max-width ]

[--fit-width] [--print-empty]

[--noindent] [--prefix PREFIX]

[--description ]

[--project ]

[--project-domain ]

使用命令创建新的安全组规则，命令如下：

[root@controller ~]# openstack security group create test

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

| Field | Value |

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

| created_at | 2022-02-10T03:25:18Z |

| description | test |

| id | 96373f68-be50-4819-b9a6-8fc8d3e9dc0a |

| location | cloud='', project.domain_id=, project.domain_name='000000', project.id='1776912d52a7444d8b2d09eb86e8d1d9', project.name='admin', region_name='', zone= |

| name | test |

| project_id | 1776912d52a7444d8b2d09eb86e8d1d9 |

| revision_number | 1 |

| rules | created_at='2022-02-10T03:25:18Z', direction='egress', ethertype='IPv4', id='2bbc98ad-4784-419d-b815-4ee2c6c75b54', updated_at='2022-02-10T03:25:18Z' |

| | created_at='2022-02-10T03:25:19Z', direction='egress', ethertype='IPv6', id='70fcb5e0-fd86-461e-84a4-2a83b4b90730', updated_at='2022-02-10T03:25:19Z' |

| tags | [] |

| updated_at | 2022-02-10T03:25:18Z |

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

（3）删除访问安全组

可以使用命令删除不需要使用的访问安全组，命令如下：

[root@controller ~]# openstack security group delete test

[root@controller ~]# openstack security group list

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

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

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

（4）添加安全规则

在默认安全组中添加三条需要使用的访问规则，使用“openstack security group rule create”命令，命令格式如下：

[root@controller ~]# openstack help security group rule create

usage: openstack security group rule create [-h]

[-f {json,shell,table,value,yaml}]

[-c COLUMN]

[--max-width ]

[--fit-width] [--print-empty]

[--noindent] [--prefix PREFIX]

[--remote-ip | --remote-group ]

[--description ]

[--dst-port ]

[--icmp-type ]

[--icmp-code ]

[--protocol ]

[--ingress | --egress]

[--ethertype ]

[--project ]

[--project-domain ]

在“defualt”安全组中添加一条策略，从入口方向放行所有ICMP规则，命令如下：

[root@controller ~]# openstack security group rule create --protocol icmp --ingress default

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

| Field | Value |

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

| created_at | 2022-02-10T04:47:42Z |

| description | |

| direction | ingress |

| ether_type | IPv4 |

| id | 61014f36-5c20-46ce-b779-7d0c7458e691 |

| location | cloud='', project.domain_id=, project.domain_name='000000', project.id='1776912d52a7444d8b2d09eb86e8d1d9', project.name='admin', region_name='', zone= |

| name | None |

| port_range_max | None |

| port_range_min | None |

| project_id | 1776912d52a7444d8b2d09eb86e8d1d9 |

| protocol | icmp |

| remote_group_id | None |

| remote_ip_prefix | 0.0.0.0/0 |

| revision_number | 0 |

| security_group_id | 896ce430-21f8-4673-8110-afce97e43715 |

| tags | [] |

| updated_at | 2022-02-10T04:47:42Z |

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

在“defualt”安全组中添加一条策略，从入口方向放行所有TCP规则，命令如下：

[root@controller ~]# openstack security group rule create --protocol tcp --ingress default

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

| Field | Value |

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

| created_at | 2022-02-10T04:47:59Z |

| description | |

| direction | ingress |

| ether_type | IPv4 |

| id | 03ace6cf-ec1a-42a9-a754-c21fe887d1c0 |

| location | cloud='', project.domain_id=, project.domain_name='000000', project.id='1776912d52a7444d8b2d09eb86e8d1d9', project.name='admin', region_name='', zone= |

| name | None |

| port_range_max | None |

| port_range_min | None |

| project_id | 1776912d52a7444d8b2d09eb86e8d1d9 |

| protocol | tcp |

| remote_group_id | None |

| remote_ip_prefix | 0.0.0.0/0 |

| revision_number | 0 |

| security_group_id | 896ce430-21f8-4673-8110-afce97e43715 |

| tags | [] |

| updated_at | 2022-02-10T04:47:59Z |

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

在“defualt”安全组中添加一条策略，从入口方向放行所有UDP规则，命令如下：

[root@controller ~]# openstack security group rule create --protocol udp --ingress default

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

| Field | Value |

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

| created_at | 2022-02-10T04:48:22Z |

| description | |

| direction | ingress |

| ether_type | IPv4 |

| id | 9ec501e5-2c16-4d89-8a15-57a16a8fe3cd |

| location | cloud='', project.domain_id=, project.domain_name='000000', project.id='1776912d52a7444d8b2d09eb86e8d1d9', project.name='admin', region_name='', zone= |

| name | None |

| port_range_max | None |

| port_range_min | None |

| project_id | 1776912d52a7444d8b2d09eb86e8d1d9 |

| protocol | udp |

| remote_group_id | None |

| remote_ip_prefix | 0.0.0.0/0 |

| revision_number | 0 |

| security_group_id | 896ce430-21f8-4673-8110-afce97e43715 |

| tags | [] |

| updated_at | 2022-02-10T04:48:22Z |

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

查看“default”安全组中所有的规则列表信息，命令如下：

[root@controller ~]# openstack security group rule list default

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

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

| 03ace6cf-ec1a-42a9-a754-c21fe887d1c0 | tcp | IPv4 | 0.0.0.0/0 | | None |

| 9ec501e5-2c16-4d89-8a15-57a16a8fe3cd | udp | IPv4 | 0.0.0.0/0 | | None |

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

3. 启动虚拟机

（1）查询可用镜像

上传镜像，使用“openstack image list”命令查看当前可用镜像列表。命令如下：

[root@controller ~]# curl -O http://mirrors.douxuedu.com/newcloud/cirros-0.3.4-x86_64-disk.img

[root@controller ~]# glance image-create --name cirros-0.3.4 --disk-format qcow2 --container-format bare --progress < cirros-0.3.4-x86_64-disk.img

…

[root@controller ~]# openstack image list

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

| ID | Name | Status |

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

| 32a2513c-e5ba-438b-a5ee-63c35c03b284 | cirros-0.3.4 | active |

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

使用“openstack flavor list”命令查看可用的类型。命令如下：

[root@controller ~]# openstack flavor list

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

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

| 1 | m1.tiny | 512 | 10 | 0 | 1 | True |

| 10 | centos | 1024 | 10 | 0 | 2 | True |

| 2 | m1.small | 1024 | 20 | 0 | 1 | True |

| 3 | m1.medium | 2048 | 40 | 0 | 2 | True |

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

（2）创建网络和子网

使用“openstack network create ”命令创建网络息。命令如下：

[root@controller ~]# openstack network create --provider-network-type vlan --provider-physical-network provider network-vlan --provider-segment 200

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

| Field | Value |

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

| admin_state_up | UP |

| availability_zone_hints | |

| availability_zones | |

| created_at | 2022-02-10T05:02:18Z |

| description | |

| dns_domain | None |

| id | cccedc78-027d-40e9-afbd-708154923ca6 |

| ipv4_address_scope | None |

| ipv6_address_scope | None |

| is_default | False |

| is_vlan_transparent | None |

| location | cloud='', project.domain_id=, project.domain_name='000000', project.id='1776912d52a7444d8b2d09eb86e8d1d9', project.name='admin', region_name='', zone= |

| mtu | 1500 |

| name | network-vlan |

| port_security_enabled | True |

| project_id | 1776912d52a7444d8b2d09eb86e8d1d9 |

| provider:network_type | vlan |

| provider:physical_network | provider |

| provider:segmentation_id | 200 |

| qos_policy_id | None |

| revision_number | 1 |

| router:external | Internal |

| segments | None |

| shared | False |

| status | ACTIVE |

| subnets | |

| tags | |

| updated_at | 2022-02-10T05:02:18Z |

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

使用“openstack subnet create”创建子网。命令如下：

[root@controller ~]# openstack subnet list

[root@controller ~]# openstack subnet create --network network-vlan --allocation-pool start=192.168.200.100,end=192.168.200.200 --gateway 192.168.200.1 --subnet-range 192.168.200.0/24 subnet-vlan

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

| Field | Value |

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

| allocation_pools | 192.168.200.100-192.168.200.200 |

| cidr | 192.168.200.0/24 |

| created_at | 2022-02-10T05:03:52Z |

| description | |

| dns_nameservers | |

| enable_dhcp | True |

| gateway_ip | 192.168.200.1 |

| host_routes | |

| id | 69c14fff-de95-440a-bc8e-fe9f43e4b424 |

| ip_version | 4 |

| ipv6_address_mode | None |

| ipv6_ra_mode | None |

| location | cloud='', project.domain_id=, project.domain_name='000000', project.id='1776912d52a7444d8b2d09eb86e8d1d9', project.name='admin', region_name='', zone= |

| name | subnet-vlan |

| network_id | cccedc78-027d-40e9-afbd-708154923ca6 |

| prefix_length | None |

| project_id | 1776912d52a7444d8b2d09eb86e8d1d9 |

| revision_number | 0 |

| segment_id | None |

| service_types | |

| subnetpool_id | None |

| tags | |

| updated_at | 2022-02-10T05:03:52Z |

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

（3）修改OpenStack平台

修改Nova服务配置文件，设置参数“virt_type=qemu”。命令参数如下：

[root@controller ~]# crudini --set /etc/nova/nova.conf libvirt virt_type qemu

[root@controller ~]# systemctl restart openstack-nova-compute

（4）启动云主机

使用“openstack server create”命令创建云主机，其命令格式如下：

[root@controller ~]# openstack help server create

usage: openstack server create [-h] [-f {json,shell,table,value,yaml}]

[-c COLUMN] [--max-width ]

[--fit-width] [--print-empty] [--noindent]

[--prefix PREFIX]

(--image | --volume ) --flavor

[--security-group ]

[--key-name ]

[--property ]

[--file ]

[--user-data ]

[--availability-zone ]

[--block-device-mapping ]

[--nic ]

[--network ] [--port ]

[--hint ]

[--config-drive |True]

[--min ] [--max ] [--wait]

通过命令创建云主机，使用cirros镜像，flavor为1核vCPU、512M内存、10G硬盘，使用network-vlan网络。云主机名为“cirros-test”创建命令如下：

[root@controller ~]# openstack server create --image cirros-0.3.4 --flavor 10 --network network-vlan cirros-test

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

| Field | Value |

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

| OS-DCF:diskConfig | MANUAL |

| OS-EXT-AZ:availability_zone | |

| OS-EXT-SRV-ATTR:host | None |

| OS-EXT-SRV-ATTR:hypervisor_hostname | None |

| OS-EXT-SRV-ATTR:instance_name | |

| OS-EXT-STS:power_state | NOSTATE |

| OS-EXT-STS:task_state | scheduling |

| OS-EXT-STS:vm_state | building |

| OS-SRV-USG:launched_at | None |

| OS-SRV-USG:terminated_at | None |

| accessIPv4 | |

| accessIPv6 | |

| addresses | |

| adminPass | 3QV3njyWpTnk |

| config_drive | |

| created | 2022-03-01T07:08:26Z |

| flavor | centos (10) |

| hostId | |

| id | d152e1e5-7ff2-4f4e-9a1f-4133d8c4d6fe |

| image | cirros-0.3.4 (84a1ae85-7638-4d77-b5ae-7257b522bd13) |

| key_name | None |

| name | cirros-test |

| progress | 0 |

| project_id | 84b07b58499c419d9bb3c6de945abc21 |

| properties | |

| security_groups | name='default' |

| status | BUILD |

| updated | 2022-03-01T07:08:27Z |

| user_id | 641a71d3af054cf29e99cef1c6f7e534 |

| volumes_attached | |

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

4. 管理虚拟机

（1）查看虚拟机

使用“openstack server list”命令查看虚拟机列表信息，使用命令如下：

[root@controller ~]# openstack server list

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

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

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

使用命令可以查看虚拟机的具体信息，包括使用的安全组、flavor以及网络信息，通过命令“openstack server show”进行查看。命令如下：

[root@controller ~]# openstack server show cirros-test

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

| Field | Value |

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

| OS-DCF:diskConfig | MANUAL |

| OS-EXT-AZ:availability_zone | nova |

| OS-EXT-SRV-ATTR:host | controller |

| OS-EXT-SRV-ATTR:hypervisor_hostname | controller |

| OS-EXT-SRV-ATTR:instance_name | instance-00000001 |

| OS-EXT-STS:power_state | Running |

| OS-EXT-STS:task_state | None |

| OS-EXT-STS:vm_state | active |

| OS-SRV-USG:launched_at | 2022-03-01T07:08:42.000000 |

| OS-SRV-USG:terminated_at | None |

| accessIPv4 | |

| accessIPv6 | |

| addresses | network-vlan=192.168.200.187 |

| config_drive | |

| created | 2022-03-01T07:08:26Z |

| flavor | centos (10) |

| hostId | 3f5e51b24503c97ac5e8033e5552e14e990f49f7e5583898f5b7329c |

| id | d152e1e5-7ff2-4f4e-9a1f-4133d8c4d6fe |

| image | cirros-0.3.4 (84a1ae85-7638-4d77-b5ae-7257b522bd13) |

| key_name | None |

| name | cirros-test |

| progress | 0 |

| project_id | 84b07b58499c419d9bb3c6de945abc21 |

| properties | |

| security_groups | name='default' |

| status | ACTIVE |

| updated | 2022-03-01T07:08:42Z |

| user_id | 641a71d3af054cf29e99cef1c6f7e534 |

| volumes_attached | |

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

（2）操作虚拟机

可以通过命令操作虚拟机，对虚拟机进行关机、开机、重启等操作。关闭虚拟机操作，命令如下：

[root@controller ~]# openstack server stop cirros-test

[root@controller ~]# openstack server list

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

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

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

通过命令操作虚拟机，对虚拟机进行开机操作，命令如下：

[root@controller ~]# openstack server start cirros-test

[root@controller ~]# openstack server list

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

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

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

通过命令操作虚拟机，对虚拟机进行重启操作，命令如下：

[root@controller ~]# openstack server reboot cirros-test

[root@controller ~]# openstack server list

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

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

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

5. 云主机调整类型大小

（1）修改配置文件

修改controller节点nova.conf配置文件，添加调整类型大小的参数，controller节点设置参数如下所示：

[root@controller ~]# crudini --set /etc/nova/nova.conf DEFAULT allow_resize_to_same_host True

[root@controller ~]# crudini --set /etc/nova/nova.conf DEFAULT scheduler_default_filters RetryFilter,AvailabilityZoneFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter

修改完配置文件后重启相关服务。命令如下所示：

[root@controller ~]#systemctl restart openstack-nova*

（2）创建云主机类型

现有云主机硬盘和内存不满足使用，需要对现有云主机进行资源扩容，将内存扩容至1G，硬盘扩容至15G大小，类型名称为“centos1”首先创建一个新的云主机类型满足扩容资源的需求。通过命令创建新云主机类型，命令如下所示：

[root@controller ~]# openstack flavor create --disk 15 --ram 1024 --vcpus 2 centos1

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

| Field | Value |

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

| OS-FLV-DISABLED:disabled | False |

| OS-FLV-EXT-DATA:ephemeral | 0 |

| disk | 15 |

| id | a99a75ba-5afb-448b-bfc8-6bc656471476 |

| name | centos1 |

| os-flavor-access:is_public | True |

| properties | |

| ram | 1024 |

| rxtx_factor | 1.0 |

| swap | |

| vcpus | 2 |

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

查看当前云主机类型列表，命令如下：

[root@controller ~]# openstack flavor list

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

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

| 1 | m1.tiny | 512 | 10 | 0 | 1 | True |

| 10 | centos | 512 | 10 | 0 | 1 | True |

| 2 | m1.small|1024 | 20 | 0 | 1 | True |

| 3 |m1.medium|2048 | 40 | 0 | 2 | True |

|a99a75ba-5afb-448b-bfc8-6bc656471476|centos1 |1024 | 15 | 0 | 2 | True |

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

（3）调整云主机类型

查看云主机列表，通过命令查看云主机列表。命令如下：

[root@controller ~]# openstack server list

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

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

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

使用命令“openstack server resize”调整云主机类型，命令格式如下：

[root@controller ~]# openstack help server resize

usage: openstack server resize [-h] [--flavor | --confirm | --revert]

[--wait]

Server (name or ID)

optional arguments:

-h, --help show this help message and exit

--flavor Resize server to specified flavor

--confirm Confirm server resize is complete

--revert Restore server state before resize

--wait Wait for resize to complete

修改dashboard配置文件：

[root@controller ~]# vi /etc/openstack-dashboard/local_settings

…

SESSION_ENGINE = 'django.contrib.sessions.backends.file'

…

[root@controller ~]# systemctl restart httpd memcached

使用命令调整云主机“cirros-test”类型为centos1，使用–wait参数，在命令执行后，调整云主机需要一定时间，添加–wait参数后会在确认时回馈“complete”。命令如下所示：

[root@controller ~]# openstack server resize --flavor centos1 --wait cirros-test

Complete

[root@controller ~]# openstack server list

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

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

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

此时为待确定状态，登录OpenStack平台，如图1所示：

图1 登录openstack平台

单击右上角设置，选择简体中文，单击“保存”按钮，如图2所示：

图2 设置中文

在左侧导航栏选择“项目→计算→实例”，在实例最后的动作下拉菜单中选择“确认调整大小/迁移”，如图3与图4所示：

图3 确认调整大小/迁移

图4 调整成功

在命令执行完毕后，通过命令查看云主机列表信息。命令如下：

[root@controller ~]# openstack server list

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

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

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