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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