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