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Newton版Openstack如何实现Dashboard开发
这篇文章主要介绍Newton版Openstack如何实现Dashboard开发，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
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Dashboard简介
Openstack的Dashboard项目一般被称为Horizon,根据官网安装部署及其简单,yum install openstack-dashboard即可，配置也简单只要修改/etc/openstack-dashboard/local_settings以及/etc/sysconfig/memcached，再启动httpd服务就可以登录了。
但是在查看它的源码就会发现，它并不是你想的那么简单。
Horizon：它是一个基于django webframework开发的标准的python wsgi程序,一般运行在webserver(apache httpd)之上。
Horizon的源码中，包含两个代码文件夹
horizon ### /usr/lib/python2.7/site-packages/horizon
openstack_dashboard ### /usr/share/openstack-dashboard
创建一个Dashboard
1.环境准备
| 操作系统 | Centos7.2 |
|---|---|
| Openstack | Newton |
| Python | 2.7.5 |
| Django | 1.8.14 |
查看Django版本
# python Python 2.7.5 (default, Nov 6 2016, 00:28:07) [GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import django >>> print django.VERSION (1, 8, 14, 'final', 0)
2.创建dashboard应用
既然每个dashboard都是django中的一个app，那就可以使用django的命令来创建一个dashboard目录结构
# cd /usr/share/openstack-dashboard # python manage.py Type 'manage.py help' for help on a specific subcommand. Available subcommands: [auth] changepassword createsuperuser [compressor] compress mtime_cache [django] check compilemessages createcachetable dbshell diffsettings dumpdata flush inspectdb loaddata makemessages makemigrations migrate runfcgi shell showmigrations sql sqlall sqlclear sqlcustom sqldropindexes sqlflush sqlindexes sqlmigrate sqlsequencereset squashmigrations startapp startproject syncdb test testserver validate [horizon] startdash startpanel [openstack_dashboard] make_web_conf migrate_settings [sessions] clearsessions [staticfiles] collectstatic findstatic runserver
可以看到horizon部分有startdash和startpanel两个命令，可以直接使用：
# mkdir -p openstack_dashboard/dashboards/dlwdashboard # python manage.py startdash dlwdashboard --target openstack_dashboard/dashboards/dlwdashboard # mkdir -p openstack_dashboard/dashboards/dlwdashboard/dlwpanel # python manage.py startpanel dlwpanel --dashboard=openstack_dashboard.dashboards.dlwdashboard --target=openstack_dashboard/dashboards/dlwdashboard/dlwpanel
2.1、目录结构：
# cd openstack_dashboard/dashboards/ # tree dlwdashboard/ dlwdashboard/ ├── dashboard.py ├── dashboard.pyc ├── dlwpanel │ ├── __init__.py │ ├── panel.py │ ├── templates │ │ └── dlwpanel │ │ └── index.html │ ├── tests.py │ ├── urls.py │ └── views.py ├── __init__.py ├── __init__.pyc ├── static │ └── dlwdashboard │ ├── js │ │ └── dlwdashboard.js │ └── scss │ └── dlwdashboard.scss └── templates └── dlwdashboard └── base.html 9 directories, 13 files
2.2定义一个仪表盘dashboard
# cd dlwdashboard/
# vi dashboard.py
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from django.utils.translation import ugettext_lazy as _
import horizon
class Dlwgroup(horizon.PanelGroup):
slug = "dlwgroup"
name = _("Dlw Group")
panels = ('dlwpanel',)
class Dlwdashboard(horizon.Dashboard):
# name = _("Dlw dashboard")
name = _("Dlw")
slug = "dlwdashboard"
panels = (Dlwgroup,) # Add your panels here.
default_panel = 'dlwpanel' # Specify the slug of the dashboard's default panel.
horizon.register(Dlwdashboard)可以定义修改dashboard的名字
name = _("Dlw")创建面板panel
3.1、目录结构
# tree dlwpanel/ dlwpanel/ ├── __init__.py ├── panel.py ├── templates │ └── dlwpanel │ └── index.html ├── tests.py ├── urls.py └── views.py 2 directories, 6 files
3.2、定义面板
# cd dlwpanel
# vi panel.py
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from django.utils.translation import ugettext_lazy as _
import horizon
from openstack_dashboard.dashboards.dlwdashboard import dashboard
class Dlwpanel(horizon.Panel):
name = _("Dlw panel")
slug = "dlwpanel"
dashboard.Dlwdashboard.register(Dlwpanel)3.3、定义表单tables
# vi tables.py
from django.utils.translation import ugettext_lazy as _
from horizon import tables
class MyFilterAction(tables.FilterAction):
name = "myfilter"
class InstancesTable(tables.DataTable):
name = tables.Column('name', \
verbose_name=_("Name"))
status = tables.Column('status', \
verbose_name=_("Status"))
zone = tables.Column('availability_zone', \
verbose_name=_("Availability Zone"))
image_name = tables.Column('image_name', \
verbose_name=_("Image Name"))
class Meta(object):
name = "instances"
verbose_name = _("Instances")
table_actions = (MyFilterAction,)3.4、定义标签页tab
# vi tab.py
from django.utils.translation import ugettext_lazy as _
from horizon import exceptions
from horizon import tabs
from openstack_dashboard import api
from openstack_dashboard.dashboards.dlwdashboard.dlwpanel import tables
class InstanceTab(tabs.TableTab):
name = _("Instances Tab")
slug = "instances_tab"
table_classes = (tables.InstancesTable,)
template_name = ("horizon/common/_detail_table.html")
preload = False
def has_more_data(self, table):
return self._has_more
def get_instances_data(self):
try:
marker = self.request.GET.get(
tables.InstancesTable._meta.pagination_param, None)
instances, self._has_more = api.nova.server_list(
self.request,
search_opts={'marker': marker, 'paginate': True})
return instances
except Exception:
self._has_more = False
error_message = _('Unable to get instances')
exceptions.handle(self.request, error_message)
return []
class DlwpanelTabs(tabs.TabGroup):
slug = "dlwpanel_tabs"
tabs = (InstanceTab,)
sticky = True3.4、定义视图views.py
# vi views.py # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. from horizon import tabs from openstack_dashboard.dashboards.dlwdashboard.dlwpanel \ import tabs as dlwdashboard_tabs class IndexView(tabs.TabbedTableView): tab_group_class = dlwdashboard_tabs.DlwpanelTabs template_name = 'dlwdashboard/dlwpanel/index.html' def get_data(self, request, context, *args, **kwargs): # Add data to the context here... return context
3.5、自动生成的url.py
# vi url.py # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. from django.conf.urls import url from openstack_dashboard.dashboards.dlwdashboard.dlwpanel import views urlpatterns = [ url(r'^$', views.IndexView.as_view(), name='index'), ]
3.6、定义模板template
# cd templates/dlwpanel/
# vi index.html
{% extends 'base.html' %}
{% load i18n %}
{% block title %}{% trans "DlwPanel" %}{% endblock %}
{% block page_header %}
{% include "horizon/common/_page_header.html" with title=_("DlwPanel") %}
{% endblock page_header %}
{% block main %}
{{ tab_group.render }}
