开源NFV管理器 - OpenStack Tacker介绍 - 3. Tacker主要驱动作用介绍

作者: 赵怡

1.  Tacker部分驱动代码

Tacker创建,更新,删除等管理监控NFV虚拟机的代码主要在vm/plugin.py文件中。

除了对数据库的操作外, 最主要的是调用几个driver驱动来实现上述创建,更新,删除等管理监控NFV虚拟机。

从master版最新代码(2016/5/13)来看, 涉及到的driver驱动有infra_drivers(用于部署NFV), mgmt_drivers(用于配置管理NFV),monitor_drivers(用于监控NFV),以及nfvo_driver(用于配置和获取VIM信息)

VM driver

NFVO driver

 

infra_driver

infra driver作用在于创建,更新,删除NFV虚拟机。

从代码上看,目前支持通过heat编排模块API来管理NFV虚拟机, 或者直接通过novaAPI来管理NFV虚拟机。涉及到的主要主要API有: create, create_wait, update, update_wait, delete, delete_wait等。

 

mgmt_driver

mgmt driver作用在于配置NFV虚拟机。比如用户希望在启动NFV虚拟机时,通过ssh配置防火墙规则。

那么用户可以自己写mgmt driver, 实现mgmt_call等接口。 这里可以把相关防火墙配置放到上述的TOSCA YAML文件中灵活配置, 通过mgmt drvier来获取配置并通过ssh命令下发给NFV虚拟机。

主要API有: mgmt_url, mgmt_call, mgmt_create_pre, mgmt_create_post,mgmt_update_pre, mgmt_update_post, mgmt_delete_pre, mgmt_delete_post, mgmt_get_config等。

 

monitor_driver

monitor driver作用在于监控NVF虚拟机的健康状态。目前已经有的monitor监控驱动有ping和httpping.

ping驱动是用linux命令 ping -c count-W timeout -i interval MGMT_IP方式来监控可达性。

http_ping驱动是用python库中的urlopen URL方式来监控web页面的可达性。

主要API有: monitor_url, monitor_call, monitor_get_config等。

 

nfvo_driver

最近新增了nfvo_driver, 对nfvo进行操作。 目前实现了部分功能, 如对VIM(目前这里只有openstack驱动)进行创建, 更新,删除操作, 代码上看目前Openstack VIM创建就是通过keystone来注册认证OpenStack, 然后获得OpenStack的一些基本信息, 如regions列表, 存入Tacker中用于安置部署。

主要API有: create_vim, update_vim, delete_vim等。

 

2.  Tacker RestFul API

Tacker API的定义在K版和L/master版上有一点小的命名区别, K版中的device_templates对应了L版中的vnfds, 而K版中的devices对应了L版中的vnfs。

以下为master分支上的Tacker RestFul API定义:

API versions Lists information for Tacker API version. GET / List API versions - Lists information about Tacker API version. Response:     {         "versions": [             {                 "status": "CURRENT",                 "id": "v1.0",                 "links": [                     {                         "href": "http://10.18.160.13:8888/v1.0",                         "rel": "self"                     }                 ]             }         ]     } Vnfds GET /v1.0/vnfds List vnfds - List vnfds stored in the VNF catalog. Response: {     "vnfds": [         {             "service_types": [                 {                     "service_type": "vnfd",                     "id": "378b774d-89f5-4634-9c65-9c49ed6f00ce"                 }             ],             "description": "OpenWRT with services",             "tenant_id": "4dd6c1d7b6c94af980ca886495bcfed0",             "mgmt_driver": "openwrt",             "infra_driver": "heat",             "attributes": {                 "vnfd": "template_name: OpenWRT\r\ndescription:                 template_description <sample_vnfd_template>"             },             "id": "247b045e-d64f-4ae0-a3b4-8441b9e5892c",             "name": "openwrt_services"         }     ] } GET /v1.0/vnfds/{vnfd_id} Show vnfd - Show information for a specified vnfd id. Response: {     "vnfd": {         "service_types": [             {                 "service_type": "vnfd",                 "id": "378b774d-89f5-4634-9c65-9c49ed6f00ce"             }         ],         "description": "OpenWRT with services",         "tenant_id": "4dd6c1d7b6c94af980ca886495bcfed0",         "mgmt_driver": "openwrt",         "infra_driver": "heat",         "attributes": {             "vnfd": "template_name: OpenWRT\r\ndescription:             template_description <sample_vnfd_template>"         },         "id": "247b045e-d64f-4ae0-a3b4-8441b9e5892c",         "name": "openwrt_services"     } } POST /v1.0/vnfds Create vnfd - Create a vnfd entry based on the vnfd template. Request:     {"auth": {"tenantName": "admin", "passwordCredentials": {"username": "admin",     "password": "devstack"}}, "vnfd": {"attributes": {"vnfd": "template_name:     OpenWRT \r\ndescription: OpenWRT router\r\n\r\nservice_properties:\r\n  Id:     sample-vnfd\r\n  vendor: tacker\r\n  version: 1\r\n\r\nvdus:\r\n  vdu1:\r\n     id: vdu1\r\n    vm_image: cirros-0.3.2-x86_64-uec\r\n    instance_type:     m1.tiny\r\n\r\n    network_interfaces:\r\n      management:\r\n        network:      net_mgmt\r\n        management: true\r\n      pkt_in:\r\n        network:      net0\r\n      pkt_out:\r\n        network: net1\r\n\r\n    placement_policy:      \r\n      availability_zone: nova\r\n\r\n    auto-scaling: noop\r\n      monitoring_policy: noop\r\n    failure_policy: noop\r\n\r\n    config:\r\n      param0: key0\r\n      param1: key1"}, "service_types": [{"service_type":      "vnfd"}], "mgmt_driver": "noop", "infra_driver": "heat"}} Response: {     "vnfd": {         "service_types": [             {                 "service_type": "vnfd",                 "id": "336fe422-9fba-47c7-87fb-d48475c3e0ce"             }         ],         "description": "OpenWRT router",         "tenant_id": "4dd6c1d7b6c94af980ca886495bcfed0",         "mgmt_driver": "noop",         "infra_driver": "heat",         "attributes": {             "vnfd": "template_name: OpenWRT \r\ndescription:             template_description <sample_vnfd_template>"         },         "id": "ab10a543-22ee-43af-a441-05a9d32a57da",         "name": "OpenWRT"     } } DELETE /v1.0/vnfds/{vnfd_id} Delete vnfd - Deletes a specified vnfd_id from the VNF catalog. This operation does not accept a request body and does not return a response body. Vnfs GET /v1.0/vnfs List vnfs - Lists instantiated vnfs in VNF Manager Response:     {         "vnfs": [             {                 "status": "ACTIVE",                 "name": "open_wrt",                 "tenant_id": "4dd6c1d7b6c94af980ca886495bcfed0",                 "instance_id": "f7c93726-fb8d-4036-8349-2e82f196e8f6",                 "mgmt_url": "{\"vdu1\": \"192.168.120.3\"}",                 "attributes": {                     "service_type": "firewall",                     "param_values": "",                     "heat_template": "description: sample_template_description                         type: OS::Nova::Server\n",                     "monitoring_policy": "noop",                     "failure_policy": "noop"                 },                 "id": "c9b4f5a5-d304-473a-a57e-b665b1f9eb8f",                 "description": "OpenWRT with services"             }         ]     } GET /v1.0/vnfs/{vnf_id} Show vnf - Show information for a specified vnf_id. Response:     {         "vnf": [             {                 "status": "ACTIVE",                 "name": "open_wrt",                 "tenant_id": "4dd6c1d7b6c94af980ca886495bcfed0",                 "instance_id": "f7c93726-fb8d-4036-8349-2e82f196e8f6",                 "mgmt_url": "{\"vdu1\": \"192.168.120.3\"}",                 "attributes": {                     "service_type": "firewall",                     "param_values": "",                     "heat_template": "description: OpenWRT with services\n                     sample_template_description    type: OS::Nova::Server\n",                     "monitoring_policy": "noop", "failure_policy": "noop"                 },                 "id": "c9b4f5a5-d304-473a-a57e-b665b1f9eb8f",                 "description": "OpenWRT with services"             }         ]     } POST /v1.0/vnfs Create vnf - Create a vnf based on the vnfd template id. Request:     {"auth": {"tenantName": "admin", "passwordCredentials": {"username": "admin",     "password": "devstack"}}, "vnf":     {"vnfd_id": "d770ddd7-6014-4191-92d8-a2cd7a6cecd8"}} Response:     {         "vnf": {             "status": "PENDING_CREATE",             "name": "",             "tenant_id": "4dd6c1d7b6c94af980ca886495bcfed0",             "description": "OpenWRT with services",             "instance_id": "4f0d6222-afa0-4f02-8e19-69e7e4fd7edc",             "mgmt_url": null,             "attributes": {                 "service_type": "firewall",                 "heat_template": "description: OpenWRT with services\n                 <sample_heat_template> type: OS::Nova::Server\n",                 "monitoring_policy": "noop",                 "failure_policy": "noop"             },             "id": "e3158513-92f4-4587-b949-70ad0bcbb2dd",             "vnfd_id": "247b045e-d64f-4ae0-a3b4-8441b9e5892c"         }     } PUT /v1.0/vnfs/{vnf_id} Update vnf - Update a vnf based on user config file or data. Request:     {"auth": {"tenantName": "admin", "passwordCredentials": {"username": "admin",     "password": "devstack"}}, "vnf": {"attributes": {"config": "vdus:\n  vdu1:     <sample_vdu_config> \n\n"}}} Response:     {         "vnf": {             "status": "PENDING_UPDATE",             "name": "",             "tenant_id": "4dd6c1d7b6c94af980ca886495bcfed0",             "instance_id": "4f0d6222-afa0-4f02-8e19-69e7e4fd7edc",             "mgmt_url": "{\"vdu1\": \"192.168.120.4\"}",             "attributes": {                 "service_type": "firewall",                 "monitoring_policy": "noop",                 "config": "vdus:\n  vdu1:\n    config: {<sample_vdu_config>                  type: OS::Nova::Server\n",                 "failure_policy": "noop"             },             "id": "e3158513-92f4-4587-b949-70ad0bcbb2dd",             "description": "OpenWRT with services"         }     } DELETE /v1.0/vnfs/{vnf_id} Delete vnf - Deletes a specified vnf_id from the VNF list.