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授之以渔-运维平台分布式任务系统,代号Veronica(Cele

授之以渔-运维平台分布式任务系统,代号Veronica(Cele

作者: 大Q的梦想 | 来源:发表于2018-12-28 15:37 被阅读40次

    2018年的最后几天平台迭代到了V6版本,代号Veronica(维罗妮卡)。(Veronica名字取自电影复仇者联盟2,电影中的Veronica是由布鲁斯·班纳(绿巨人)和托尼·斯塔克(钢铁侠)共同完成,Veronica系统包含多个功能模块,反浩克装甲是其中之一,反浩克装甲的作用相当于外勤特工,其余功能模块起着支持、补给作用。除反浩克外其余已知的功能模块包括:独立卫星通信,独立操作,战损支持(出现战损可调用备件更换),监狱式隔离仓等,有点跑题了....之所以取名Veronica ,是因为运维平台跟电影中有很多向像之处,首先平台本身独立工作,且并不具备任何运维功能,全部依靠调用外部API接口外部应用,同时平台本身可以通过分布式部署,使不同的节点一同来处理公共的任务,诸如:监控作业,项目发布,数据采集(采集这块我用到了Salt,在Veronica 中,Salt master也是多主架构的部署方式,即由不同的Veronica 节点来进行配置管理、信息采集、同步模块等,这个下期会说到),统计,计算及一些耗时任务,比如创建虚拟机。

    下文给大家一个思路,就是借助Celery分布式特性,通过多节点运行数据监控,然后存储到Redis,最后由前端Dashboard读取数据。先上一张效果图:

    image.png
    image.png

    一、 环境准备

    1.Celery 3.1.26,官网http://docs.celeryproject.org/en/latest/
    2.Celery-with-redis 3.0
    3.QUEUE及CELERY_RESULT_BACKEND 采用了REDIS 3.2.0 (后面会换Rabbitmq,官方潜力推介)
    4.Django 1.6.6
    5.Django-celery (3.1.17)

    二、食用方法

    1.Celery:

    我的环境是3台服务器,一台主控,两台代理(处理任务),每台代理跑4个队列(如图1中的25-1---25-4及26-1---26-4)
    代理25服务器的启动命令 python manage.py celery worker -n 25 -l info -Q 25-1,25-2,25-3,25-4
    代理26服务器的启动命令 python manage.py celery worker -n 26 -l info -Q 26-1,26-2,26-3,26-4
    主控24服务器的启动命令python manage.py celery beat -n 24 -l info 及 python manage.py celery worker -n 24 -l info -Q default

    代码结构如下:


    image.png

    然后3台分别在settings.py中注册定时任务模块:

    CELERY_IMPORTS = ('cmdb.mycelery.tasks.vm_task',
                      'cmdb.mycelery.schedule.cmdb_cron.cmdb_f',
                      'cmdb.mycelery.schedule.openfalconagent_cron.openfalcon_f',
                      'cmdb.mycelery.schedule.salt_cron.salt_f',
                      'cmdb.mycelery.schedule.dashboard_cron.openfalcon_f',
    )
    

    2.Djcelery:

    使用了djcelery,可以在任务中方便的直接操作Django数据库,而且最终的任务可以在Django的后台中查看和修改相关的任务。但是我们需要通过运维平台来调用djcelery的models来进行作业的增、删、改,而不是让运维小伙伴通过ADMIN后台去修改。

    后台代码:

    @csrf_exempt
    @login_required
    def schedule_interval_ajax(request):
        """获取interval,组成select"""
        interval_dict = {}
        intervalschedule_list = celery_models.IntervalSchedule.objects.all()
        for i in intervalschedule_list:
            interval_dict[i.id] = str(i.every) + ' ' + str(i.period)
        return HttpResponse(simplejson.dumps(interval_dict, ensure_ascii=False))
    
    
    @csrf_exempt
    @login_required
    def schedule_crontab_ajax(request):
        """获取crontab,组成select"""
        crontab_dict = {}
        crontabschedule_list = celery_models.CrontabSchedule.objects.all()
        for i in crontabschedule_list:
            crontab_dict[i.id] = str(i.minute) + ' ' + str(i.hour) + ' ' + str(i.day_of_week) + ' ' + str(i.day_of_month) + ' ' + str(i.month_of_year)
        return HttpResponse(simplejson.dumps(crontab_dict, ensure_ascii=False))
    
    @csrf_exempt
    @login_required
    @my_permissionVerify
    def schedule_edit_ajax(request):
        """修改作业"""
        if request.method == 'POST':
            schedule_type = request.POST['schedule_type']
            try:
                schedule_crontab_id = request.POST['schedule_crontab']
            except:
                schedule_crontab_id = ''
            try:
                schedule_interval_id = request.POST['schedule_interval']
            except:
                schedule_interval_id = ''
            if request.POST['schedule_enabled'] == 'true':
                schedule_enabled_id = 1
            else:
                schedule_enabled_id = 0
            schedule_args = request.POST['schedule_args']
            schedule_kwargs = request.POST['schedule_kwargs']
            schedule_name = request.POST['schedule_name']
            schedule_queue = request.POST['schedule_queue']
            try:
                celery_models.PeriodicTask.objects.filter(name=schedule_name).update(interval = schedule_interval_id,
                                                                                     name = schedule_name,
                                                                                     crontab = schedule_crontab_id,
                                                                                     enabled = schedule_enabled_id,
                                                                                     args = schedule_args,
                                                                                     kwargs = schedule_kwargs,
                                                                                     queue = schedule_queue)
                """保存"""
                celery_models.PeriodicTask.objects.get(name=schedule_name).save()
                return HttpResponse('{"status":1}')
            except Exception as err:
                print err
                return HttpResponse('{"status":0, "err":%s}'% err)
    
        else:
            name = request.GET['schedule_name']
            periodictask_dict = {}
            interval_dict = {}
            crontab_dict = {}
            periodictask_info = celery_models.PeriodicTask.objects.filter(name=name)
            for i in periodictask_info:
                periodictask_dict['name'] = i.name
                periodictask_dict['task'] = i.task
                interval_dict['id'] = i.interval_id
                interval_dict['context'] = str(i.interval)
                crontab_dict['id'] = i.crontab_id
                crontab_dict['context'] = str(i.crontab)
                periodictask_dict['interval_dict'] = interval_dict
                periodictask_dict['crontab_dict'] = crontab_dict
                periodictask_dict['queue'] = i.queue
                periodictask_dict['args'] = i.args
                periodictask_dict['kwargs'] = i.kwargs
                periodictask_dict['enabled'] = i.enabled
            return HttpResponse(simplejson.dumps(periodictask_dict, ensure_ascii=False))
    

    JS代码:

    function schedule_type_hidden (obj){
        if (obj.value=="1"){
            document.getElementById("add_schedule_interval").style.display ="block";
            document.getElementById("add_schedule_crontab").style.display ="none";
        }else{
            document.getElementById("add_schedule_interval").style.display ="none";
            document.getElementById("add_schedule_crontab").style.display ="block";
            }
    }
    
    $(function(){
        $("#schedule_interval_select").focus(function(){
        $.ajax({
            async: false,
            type: "POST",
            url : "../schedule_interval_ajax/",
            data : $("#submit_form").serialize(),
            cache: false,
            dataType: "json",
            beforeSend:function(){
                Metronic.blockUI({animate: true});
            },
            success: function(obj) {
                for (var id in obj){
                $("#schedule_interval_select").append("<option value="+id+">"+obj[id]+"</option>");
                    }
                $("#schedule_interval_select").unbind("focus");
                    },
            complete: function() {
                Metronic.unblockUI();
            },
                });
                return false;
                });
            });
    
    $(function(){
        $("#schedule_crontab_select").focus(function(){
        $.ajax({
            async: false,
            type: "POST",
            url : "../schedule_crontab_ajax/",
            data : $("#submit_form").serialize(),
            cache: false,
            dataType: "json",
            beforeSend:function(){
                Metronic.blockUI({animate: true});
            },
            success: function(obj) {
                for (var id in obj){
                $("#schedule_crontab_select").append("<option value="+id+">"+obj[id]+"</option>");
                    }
                $("#schedule_crontab_select").unbind("focus");
                    },
            complete: function() {
                Metronic.unblockUI();
            },
                });
                return false;
                });
            });
    
    
    $(function(){
        $("#edit_schedule_interval_select").focus(function(){
        $.ajax({
            async: false,
            type: "POST",
            url : "../schedule_interval_ajax/",
            data : $("#submit_form").serialize(),
            cache: false,
            dataType: "json",
            beforeSend:function(){
                Metronic.blockUI({animate: true});
            },
            success: function(obj) {
                $("#edit_schedule_interval_select").empty()
                for (var id in obj){
                $("#edit_schedule_interval_select").append("<option value="+id+">"+obj[id]+"</option>");
                    }
                $("#edit_schedule_interval_select").unbind("focus");
                    },
            complete: function() {
                Metronic.unblockUI();
            },
                });
                return false;
                });
            });
    
    $(function(){
        $("#edit_schedule_crontab_select").focus(function(){
        $.ajax({
            async: false,
            type: "POST",
            url : "../schedule_crontab_ajax/",
            data : $("#submit_form").serialize(),
            cache: false,
            dataType: "json",
            beforeSend:function(){
                Metronic.blockUI({animate: true});
            },
            success: function(obj) {
                $("#edit_schedule_crontab_select").empty()
                for (var id in obj){
                $("#edit_schedule_crontab_select").append("<option value="+id+">"+obj[id]+"</option>");
                    }
                $("#edit_schedule_crontab_select").unbind("focus");
                    },
            complete: function() {
                Metronic.unblockUI();
            },
                });
                return false;
                });
            });
    
    
    
    function schedule_edit(){
        $(".fa-edit").bind('click', function() {
            var schedule_name =$(this).parent().parent().find('td').eq(0).attr("id");
            $.ajax({
                type: "GET",
                url: "../schedule_edit_ajax/?schedule_name="+schedule_name,
                cache: false,
                async:true,
                dataType: "json",
                beforeSend:function(){
                    Metronic.blockUI({animate: true});
                },
                complete: function() {
                    Metronic.unblockUI();
                },
                success: function(obj)  {
                    $('#edit_schedule_name').val(obj['name'])
                    $('#edit_schedule_queue').val(obj['queue'])
                    $('#edit_schedule_args').val(obj['interval_id'])
                    $('#edit_schedule_args').val(obj['args'])
                    $('#edit_schedule_kwargs').val(obj['kwargs'])
                    if (obj['interval_dict']['id'] == null){
                      $('#edit_schedule_type').val("2")
                        document.getElementById("edit_add_schedule_interval").style.display ="none";
                        document.getElementById("edit_add_schedule_crontab").style.display ="block";
                        $("#edit_schedule_crontab_select").append("<option value="+obj['crontab_dict']['id']+">"+obj['crontab_dict']['context']+"</option>");
                    }
                    if (obj['crontab_dict']['id'] == null){
                      $('#edit_schedule_type').val("1")
                        document.getElementById("edit_add_schedule_interval").style.display ="block";
                        document.getElementById("edit_add_schedule_crontab").style.display ="none";
                        $("#edit_schedule_interval_select").append("<option value="+obj['interval_dict']['id']+">"+obj['interval_dict']['context']+"</option>");
                    }
                    if (obj['enabled'] == true ){
                        $('#edit_schedule_enabled').bootstrapSwitch('toggleState');
                        $('#edit_schedule_enabled').bootstrapSwitch('state', true);
                        $("#edit_schedule_enableds").val('true')
                    }else{
                        $('#edit_schedule_enabled').bootstrapSwitch('toggleState');
                        $('#edit_schedule_enabled').bootstrapSwitch('state', false);
                        $("#edit_schedule_enableds").val('false')
                    }
                    }
                    });
            $("#edit_schedule_enabled").on('switchChange.bootstrapSwitch', function(e, status) {
                if (status == false){
                $("#edit_schedule_enableds").val('false');
                }else{
                $("#edit_schedule_enableds").val('true');
                }
            });
        $('#responsive2 form').submit(function(){
            $.ajax({
                type: "POST",
                data: $('#responsive2 form').serialize(),
                url: "../schedule_edit_ajax/",
                cache: false,
                async:true,
                dataType: "json",
                beforeSend:function(){
                    Metronic.blockUI({animate: true});
                },
                complete: function() {
                    Metronic.unblockUI();
                },
                success: function(obj)  {
                      if (obj['status'] == "1"){
                          alert('定时调度修改成功');
                          $('#responsive2').modal('hide');
                          $('#responsive2 form')[0].reset();
                      }else {
                          alert('定时调度修改失败,错误为:'+obj['err']);
                       }
                    }
                    });
                    return false;
                    });
                    });
               $('#responsive2').on('hide.bs.modal', function () {
                  location.reload();
                });
                }
                $(document).ready(function(){
                    schedule_edit();
                    })
    
    

    3.最后:

    后面要做的就是通过异步的任务队列对获取你想要的数据,图上我的作业是通过OPENFALCON的接口获取负载排名、IO排名,进出流量排名等。然后存储到Redis,在由Dashboard通过局部刷新分别从Redis中读取数据。这样做的好处,不会因为访问的客户端多,导致频繁发起对各个监控系统的请求。同时可以将监控作业分散在若干机器内,实现横向的扩展(绝大部分商业监控的办法)。

    获取报警作业,代码如下:

    r = redis_conect_db5()
    
    @task()
    def triggers_list():
        cursor.execute(sql)
        triggers =cursor.fetchall()
        triggers_list=[]
        for i in triggers:
            triggers_dict={}
            triggers_dict['host'] = i[0]
            triggers_dict['description'] = i[1]
            triggers_dict['lastchange'] = Calculate_date_today(str(i[2]))
            triggers_dict['priority'] = i[3]
            triggers_dict['metric'] = ''.join(i[4].split('/')[1:]).replace(',','<br>')
            triggers_dict['cond'] = i[5]
            triggers_list.append(triggers_dict)
        cursor.close()
        conn.close()
        try:
            r.set("dashboard:triggers_list", json.dumps(triggers_list))
        except Exception as err:
            print err
        return triggers_list
    

    前台局部刷新获取数据,代码如下:

    r = redis_conect_db5()
    
    def triggers_list():
        try:
            print 'triggers from redis'
            triggers_list = json.loads(r.get("dashboard:triggers_list"))
        except:
            triggers_list = []
        return triggers_list
    

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