这篇文章将为大家详细讲解有关python如何获取到预留实例,小编觉得挺实用的,因此分享给大家做个参考,希望大家阅读完这篇文章后可以有所收获。
boto3是aws提供给python开发者的SDK,我们通过boto3可以获取到预留实例的相关信息。
boto3部署按照方法:
可以参照官方网站https://boto3.amazonaws.com/v1/documentation/api/latest/guide/quickstart.html。
值得注意的是,因为我们使用zabbix进行监控,所以.aws目录需要在zabbix用户的根目录下创建。
监控脚本:
rinViewer.py:
import datetime
import json
import time
import sys
from pytz import timezone
class rinViewer:
def __init__(self,botoclient):
self.client = botoclient;
self.info = self.client.describe_reserved_instances()["ReservedInstances"];
def simList(self): #return a simple list of reservedinstance and days left.
ans = []
for i in self.info:
if i["State"] == "active":
rins = {"instanceType":i["InstanceType"]}
dayleft = self.dayLeft(i["End"]);
rins["leftday"] = dayleft;
ans.append(rins)
return ans;
def dayLeft(self,time): #input datetime,return the days left.
cst_tz = timezone('Asia/Shanghai');
now = datetime.datetime.now(cst_tz);
return (time-now).days;
def leftDaysCheck(self,days=30): #if all reinstance left days over 30(default) it will return true,else return false and reason
info = self.simList();
for i in info:
if i["leftday"] < days:
return {"status":False,"reason":i["instanceType"]+" will be expired in "+str(i["leftday"])+"."}
return {"status":True};
def typeSum(self,type,count=-1): # return sum of ec2 with the type if count is not set.Or return bool which the sum of ec2 is correct.
siminfo = self.simList();
n = 0;
for i in siminfo:
if i["instanceType"] == type:
n = n + 1;
if count == -1:
return n;
elif count == n:
return {"status":True}
else:
return {"status":False,"reason":"Only "+str(n)+" "+type+" reserved instances.Expect "+str(count)}
def typeCheck(self,typelist): # return bool that the ec2 reinstances is match the type list or not.
for i in typelist:
ans = self.typeSum(i["type"],i["sum"]);
if ans["status"] == False:
return ans;
return {"status":True}
if __name__ == "__main__":
client = boto3.client('ec2');
rinsList=[{"type":"c5.large","sum":2}},{"type":"t2.medium","sum":1},{"type":"m4.large","sum":1}]
reqStr = sys.argv[1];
riv = rinViewer(client);
if reqStr == "leftdays":
if len(sys.argv) > 2:
res = riv.leftDaysCheck(int(sys.argv[2]))["status"];
else:
res = riv.leftDaysCheck()["status"];
print res;
elif reqStr == "typecount":
res = riv.typeCheck(rinsList)["status"];
print res;
使用说明
支持两个参数:leftdays和typecount
python rinViewer.py leftdays [days]
会检索你所有的预留实例的到期时间,如果有预留实例到期天数小于days(默认是30),返回false,如果没有临近到期返回true。
python rinViewer.py typecount
在函数中我们定义了rinsList=[{"type":"c5.large","sum":2}},{"type":"t2.medium","sum":1},这里记录了所在region所需要的预留实例数量,当执行时,会比较预留实例数量和rinsList中指定的数量是否存在出入,如果满足了指定的数量则返回true,反之返回false.
当然如果有配置中心,或者其他入口能够获得所需预留实例信息,只要提供给rinViewer.typeCheck对应的list即可。
添加到监控系统:
怎么添加到zabbix,网上文档很多,这里就不介绍了,给个效果图:
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