基于Django的Admin后台实现定制简单监控页

我们使用Django的Admin二次定制一个图形化界面,首先我们把语言设置为中文简体.

修改: settings.py
LANGUAGE_CODE = 'zh-hans'
TIME_ZONE = 'Asia/Shanghai'

修改: apps.py
from django.apps import AppConfig
class MywebConfig(AppConfig):
    name = 'MyWeb'
    verbose_name = "服务器参数收集"

接着我们来定义models.py数据库模型,定义基本的数据查询.

from django.db import models
from django.utils.html import format_html
import datetime

STATUS_CHOICES = (('d', '在用设备'), ('p', '下线设备'), ('w', '损坏设备'),)

# 定义主机基本信息表
class HostInfoDB(models.Model):
    id = models.AutoField(primary_key=True)
    # HostAddr = models.TextField(max_length=128,verbose_name="主机地址")
    HostAddr = models.CharField(max_length=128, verbose_name="主机地址")
    HostName = models.CharField(max_length=128, verbose_name="主机名称")
    HostType = models.CharField(max_length=128, verbose_name="系统类型")
    HostPosition = models.CharField(max_length=128, verbose_name="机房位置")
    HostPlatform = models.CharField(max_length=128, verbose_name="所属平台")
    HostGroup = models.CharField(max_length=128, verbose_name="分组")
    HostDataTime = models.DateTimeField(verbose_name="检查日期")
    HostUser = models.CharField(max_length=64, verbose_name="负责人")
    hostStats = models.CharField(max_length=1, choices=STATUS_CHOICES, verbose_name="设备状态")

    def __str__(self):
        return self.HostName

    # 用于给本表指定别名,这样前端就不是英文的了
    class Meta():
        verbose_name = "设备清单"
        verbose_name_plural = "设备清单"

    # 设备再用状态
    def Status(self):
        if self.hostStats == 'd':
            format_td = format_html('<span style="padding:2px;background-color:green;color:white">在用设备</span>')
        elif self.hostStats == 'p':
            format_td = format_html('<span style="padding:2px;background-color:yellow;color:black">下线设备</span>')
        elif self.hostStats == 'w':
            format_td = format_html('<span style="padding:2px;background-color:red;color:white">损坏设备</span>')
        return format_td

    Status.short_description = "当前状态"

# 指定Ping检测结果表
class HostPingInfo(models.Model):
    id = models.AutoField(primary_key=True)
    HostAddr = models.CharField(max_length=128, verbose_name="主机地址")
    flage = models.CharField(max_length=64)

    class Meta():
        verbose_name = "存活检测"
        verbose_name_plural = "存活检测"

    def Status(self):
        if self.flage == "True":
            ret = "已连接"
            color = "green"
            return format_html('<span style="color:{};">{}</span>',color,ret,)
        elif self.flage == "False":
            ret = "未连接"
            color = "red"
            return format_html('<span style="color:{};">{}</span>', color, ret,)
    Status.short_description = "状态"

# 定义CPU/内存利用率数据表结构
class HostCPUOrMemInfo(models.Model):
    id = models.AutoField(primary_key=True)
    HostAddr = models.CharField(max_length=128, verbose_name="主机地址")
    Cpu_Count = models.IntegerField()
    Mem_Count = models.IntegerField()

    class Meta():
        verbose_name = "CPU内存性能"
        verbose_name_plural = "CPU内存性能"

    def Cpu_Speed(self):
        return format_html('<progress max="100" value="{}"></progress>',self.Cpu_Count)

    def Mem_Speed(self):
        return format_html('<progress max="100" value="{}"></progress>',self.Mem_Count)

    def Check(self):
        return format_html('<a href="/admin/MyWeb/hostdb/{}/change/" rel="external nofollow" >查看</a>',self.id)

    Cpu_Speed.short_description = "CPU利用率"
    Mem_Speed.short_description = "Mem利用率"

继续定制admin.py并与上方的数据库视图相交互.

from django.contrib import admin
from MyWeb.models import *

# 必须继承ModelAdmin基类,才可以调整参数,HostDB则是你的表的名称
@admin.register(HostInfoDB)
class MyAdmin(admin.ModelAdmin):
    admin.site.site_title="后台管理"
    admin.site.site_header = "自动化监控平台"

    # list_display = 你需要展示的字段应该写在这里,此处是数据库中的字段
    list_display = ("HostAddr","HostName","HostType","HostPosition","HostDataTime","HostPlatform","HostGroup","HostUser","Status")
    # search_fields = 用于添加一个搜索框,此处作为查询条件
    #search_fields = ("HostAddr","HostType","Status",)
    # list_filter = 设置一个过滤器,此处是过滤条件
    list_filter = ("HostAddr","HostGroup",)
    # ordering = 设置一个排序条件,此处是以id作为排序依据
    ordering = ("id",)
    #list_per_page = 设置每页显示多少条记录,默认是100条
    list_per_page = 10
    #list_editable = 设置默认可编辑字段
    #list_editable = ("HostName",)
    # date_hierarchy = 显示详细时间分层筛选
    date_hierarchy = 'HostDataTime'
    # readonly_fields = 可以设置只读字段,就是无法修改的字段
    #readonly_fields = ("hostCPU","hostMEM",)

# 定义Ping检测显示字段
@admin.register(HostPingInfo)
class MyAdmin(admin.ModelAdmin):
    list_display = ("HostAddr","flage","Status")

# 定义内存CPU利用率字段
@admin.register(HostCPUOrMemInfo)
class MyAdmin(admin.ModelAdmin):
    list_display = ("id","HostAddr","Cpu_Count","Cpu_Speed","Mem_Count","Mem_Speed","Check")

保存后直接执行命令,完成命令行建表操作.

python manage.py makemigrations
python manage.py migrate
python manage.py createsuperuser

保存后启动,Django并访问http://127.0.0.1:8000/admin登录后我们依次看一下定制效果.

主页中的展示效果如下.

当我们需要增加自定义动作时,可以这样写,我们以HostCPUOrMemInfo为例

# 定义内存CPU利用率字段
@admin.register(HostCPUOrMemInfo)
class MyAdmin(admin.ModelAdmin):
    list_display = ("id","HostAddr","Cpu_Count","Cpu_Speed","Mem_Count","Mem_Speed")

    # 添加的自定义动作,此处可执行操作
    def func(self, request, queryset):
        # 此处可以写一些执行动作
        print(self, request, queryset)

    func.short_description = "自定义active动作"
    actions = [func, ]
    # Action选项都是在页面上方显示
    actions_on_top = True
    # Action选项都是在页面下方显示
    actions_on_bottom = False
    # 是否显示选择个数
    actions_selection_counter = True

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