A api add monitor scheduler

spug_api/apps/monitor/executors.py

@@ -0,0 +1,48 @@
+from libs.ssh import SSH
+from apps.host.models import Host
+from apps.setting.utils import AppSetting
+from socket import socket
+import requests
+import logging
+
+logging.captureWarnings(True)
+
+
+def site_check(url):
+    status_code = -1
+    try:
+        res = requests.get(url, timeout=10, verify=False)
+        status_code = res.status_code
+    finally:
+        return status_code == 200
+
+
+def port_check(addr, port):
+    sock = socket()
+    sock.settimeout(5)
+    return sock.connect_ex((addr, int(port))) == 0
+
+
+def host_executor(host, pkey, command):
+    exit_code = -1
+    try:
+        cli = SSH(host.hostname, host.port, host.username, pkey=pkey)
+        exit_code, _ = cli.exec_command(command)
+    finally:
+        return exit_code == 0
+
+
+def dispatch(tp, addr, extra):
+    if tp == '1':
+        return site_check(addr)
+    elif tp == '2':
+        return port_check(addr, extra)
+    elif tp == '3':
+        command = f'ps -ef|grep -v grep|grep {extra!r}'
+    elif tp == '4':
+        command = extra
+    else:
+        raise TypeError(f'invalid monitor type: {tp!r}')
+    pkey = AppSetting.get('private_key')
+    host = Host.objects.filter(pk=addr).first()
+    return host_executor(host, pkey, command)

spug_api/apps/monitor/management/commands/runmonitor.py

@@ -0,0 +1,10 @@
+from django.core.management.base import BaseCommand
+from apps.monitor.scheduler import Scheduler
+
+
+class Command(BaseCommand):
+    help = 'Start monitor process'
+
+    def handle(self, *args, **options):
+        s = Scheduler()
+        s.run()

spug_api/apps/monitor/models.py

@@ -10,6 +10,10 @@ class Detection(models.Model, ModelMixin):
         ('3', '进程检测'),
         ('4', '自定义脚本'),
     )
+    STATUS = (
+        (0, '成功'),
+        (1, '失败'),
+    )
     name = models.CharField(max_length=50)
     type = models.CharField(max_length=2, choices=TYPES)
     addr = models.CharField(max_length=255)
@@ -19,6 +23,11 @@ class Detection(models.Model, ModelMixin):
     rate = models.IntegerField(default=5)
     threshold = models.IntegerField(default=3)
     quiet = models.IntegerField(default=24 * 60)
+    fault_times = models.SmallIntegerField(default=0)
+    latest_status = models.SmallIntegerField(choices=STATUS, null=True)
+    latest_run_time = models.CharField(max_length=20, null=True)
+    latest_fault_time = models.IntegerField(null=True)
+    latest_notify_time = models.IntegerField(default=0)
 
     created_at = models.CharField(max_length=20, default=human_time)
     created_by = models.ForeignKey(User, models.PROTECT, related_name='+')
@@ -28,6 +37,7 @@ class Detection(models.Model, ModelMixin):
     def to_dict(self, *args, **kwargs):
         tmp = super().to_dict(*args, **kwargs)
         tmp['type_alias'] = self.get_type_display()
+        tmp['latest_status_alias'] = self.get_latest_status_display()
         return tmp
 
     def __repr__(self):

spug_api/apps/monitor/scheduler.py

@@ -0,0 +1,90 @@
+from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.triggers.interval import IntervalTrigger
+from apscheduler import events
+from django_redis import get_redis_connection
+from apps.monitor.models import Detection
+from apps.monitor.executors import dispatch
+from django.conf import settings
+from libs import AttrDict, human_time
+import logging
+import json
+import time
+
+logger = logging.getLogger("django.apps.monitor")
+
+
+class Scheduler:
+    timezone = settings.TIME_ZONE
+
+    def __init__(self):
+        self.scheduler = BackgroundScheduler(timezone=self.timezone)
+        self.scheduler.add_listener(self._handle_event, )
+
+    def _handle_notify(self, obj, old_status):
+        if obj.latest_status == 0:
+            if old_status == 1:
+                logger.info(f'{human_time()} recover job_id: {obj.id}')
+        else:
+            if obj.fault_times >= obj.threshold:
+                if time.time() - obj.latest_notify_time >= obj.quiet * 60:
+                    obj.latest_notify_time = int(time.time())
+                    obj.save()
+                    logger.info(f'{human_time()} notify job_id: {obj.id}')
+
+    def _handle_event(self, event):
+        # TODO: notify to user
+        if event.code == events.EVENT_SCHEDULER_SHUTDOWN:
+            logger.info(f'EVENT_SCHEDULER_SHUTDOWN: {event}')
+        if event.code == events.EVENT_JOB_MAX_INSTANCES:
+            logger.info(f'EVENT_JOB_MAX_INSTANCES: {event}')
+        if event.code == events.EVENT_JOB_ERROR:
+            logger.info(f'EVENT_JOB_ERROR: job_id {event.job_id} exception: {event.exception}')
+        if event.code == events.EVENT_JOB_MISSED:
+            logger.info(f'EVENT_JOB_MISSED: job_id {event.job_id}')
+        if event.code == events.EVENT_JOB_EXECUTED:
+            obj = Detection.objects.filter(pk=event.job_id).first()
+            old_status = obj.latest_status
+            obj.latest_status = 0 if event.retval else 1
+            obj.latest_run_time = human_time(event.scheduled_run_time)
+            if old_status == 0 and event.retval is False:
+                obj.latest_fault_time = int(time.time())
+            if obj.latest_status == 0:
+                obj.latest_notify_time = 0
+                obj.fault_times = 0
+            else:
+                obj.fault_times += 1
+            obj.save()
+            self._handle_notify(obj, old_status)
+
+    def _init(self):
+        self.scheduler.start()
+        for item in Detection.objects.filter(is_active=True):
+            trigger = IntervalTrigger(minutes=int(item.rate), timezone=self.timezone)
+            self.scheduler.add_job(
+                dispatch,
+                trigger,
+                id=str(item.id),
+                args=(item.type, item.addr, item.extra),
+            )
+
+    def run(self):
+        rds_cli = get_redis_connection()
+        self._init()
+        rds_cli.delete(settings.MONITOR_KEY)
+        logger.info('Running monitor')
+        while True:
+            _, data = rds_cli.blpop(settings.MONITOR_KEY)
+            task = AttrDict(json.loads(data))
+            if task.action in ('add', 'modify'):
+                trigger = IntervalTrigger(minutes=int(task.rate), timezone=self.timezone)
+                self.scheduler.add_job(
+                    dispatch,
+                    trigger,
+                    id=str(task.id),
+                    args=(task.type, task.addr, task.extra),
+                    replace_existing=True
+                )
+            elif task.action == 'remove':
+                job = self.scheduler.get_job(str(task.id))
+                if job:
+                    job.remove()

spug_api/apps/monitor/views.py

@@ -1,6 +1,9 @@
 from django.views.generic import View
 from libs import json_response, JsonParser, Argument, human_time
 from apps.monitor.models import Detection
+from django_redis import get_redis_connection
+from django.conf import settings
+import json
 
 
 class DetectionView(View):
@@ -22,12 +25,38 @@ class DetectionView(View):
         ).parse(request.body)
         if error is None:
             if form.id:
-                form.updated_at = human_time()
+                Detection.objects.filter(pk=form.id).update(
-                form.updated_by = request.user
+                    updated_at=human_time(),
-                Detection.objects.filter(pk=form.pop('id')).update(**form)
+                    updated_by=request.user,
+                    **form)
+                task = Detection.objects.filter(pk=form.id).first()
+                if task and task.is_active:
+                    form.action = 'modify'
+                    rds_cli = get_redis_connection()
+                    rds_cli.rpush(settings.MONITOR_KEY, json.dumps(form))
             else:
-                form.created_by = request.user
+                Detection.objects.create(created_by=request.user, **form)
-                Detection.objects.create(**form)
+                form.action = 'add'
+                rds_cli = get_redis_connection()
+                rds_cli.rpush(settings.MONITOR_KEY, json.dumps(form))
+        return json_response(error=error)
+
+    def patch(self, request):
+        form, error = JsonParser(
+            Argument('id', type=int, help='请指定操作对象'),
+            Argument('is_active', type=bool, required=False)
+        ).parse(request.body, True)
+        if error is None:
+            Detection.objects.filter(pk=form.id).update(**form)
+            if form.get('is_active') is not None:
+                if form.is_active:
+                    task = Detection.objects.filter(pk=form.id).first()
+                    message = {'id': form.id, 'action': 'add'}
+                    message.update(task.to_dict(selects=('addr', 'extra', 'rate', 'type')))
+                else:
+                    message = {'id': form.id, 'action': 'remove'}
+                rds_cli = get_redis_connection()
+                rds_cli.rpush(settings.MONITOR_KEY, json.dumps(message))
         return json_response(error=error)
 
     def delete(self, request):
@@ -35,5 +64,9 @@ class DetectionView(View):
             Argument('id', type=int, help='请指定操作对象')
         ).parse(request.GET)
         if error is None:
-            Detection.objects.filter(pk=form.id).delete()
+            task = Detection.objects.filter(pk=form.id).first()
+            if task:
+                if task.is_active:
+                    return json_response(error='该监控项正在运行中，请先停止后再尝试删除')
+                task.delete()
         return json_response(error=error)

spug_api/requirements.txt

@@ -2,4 +2,5 @@ apscheduler==3.6.3
 Django==2.2.7
 channels==2.3.1
 paramiko==2.6.0
-django-redis==4.10.0
+django-redis==4.10.0
+requests==2.22.0

spug_api/spug/settings.py

@@ -81,6 +81,7 @@ CHANNEL_LAYERS = {
 }
 
 SCHEDULE_KEY = 'spug:schedule'
+MONITOR_KEY = 'spug:monitor'
 
 # Internationalization
 # https://docs.djangoproject.com/en/2.2/topics/i18n/