Created
December 9, 2015 16:40
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AWS Lambda function that processes cloudwatch logs and invokes a slack function
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import boto3 | |
import datetime | |
import json | |
import urllib2 | |
import base64 | |
import gzip | |
from StringIO import StringIO | |
print('Loading function') | |
class SlackWrapper: | |
#slack | |
__channel = '#test' | |
__icon_url = 'https://raw.githubusercontent.com/donnemartin/dev-setup-resources/master/res/aws_lambda.png' | |
__username = 'lambda' | |
def __init__(self, username = __username): | |
self.username = username | |
self.client = boto3.client('lambda', region_name='ap-northeast-1') | |
def post(self, posttext): | |
params = { | |
'channel': self.__channel , | |
'text':posttext, | |
'icon_url': self.__icon_url, | |
'username':self.username | |
} | |
print params | |
self.client.invoke(FunctionName='slack', InvocationType='Event', Payload=json.dumps(params)) | |
class JST(datetime.tzinfo): | |
def utcoffset(self, dt): | |
return datetime.timedelta(hours=9) | |
def dst(self, dt): | |
return datetime.timedelta(0) | |
def tzname(self, dt): | |
return "JST" | |
def get_events(record): | |
decoded_data = record.decode('base64') | |
unzipped_data = gzip.GzipFile(fileobj=StringIO(decoded_data)).read() | |
json_data = json.loads(unzipped_data) | |
first_time = json_data['logEvents'][0]['timestamp']/1000.0 | |
events= "`" + datetime.datetime.fromtimestamp(first_time, tz=JST()).strftime('%Y-%m-%d %H:%M:%S%z') + "`\n" | |
for data in json_data['logEvents']: | |
events += data['message'] | |
return events, json_data['logGroup'] | |
def lambda_handler(event, context): | |
print("Received event: " + json.dumps(event, indent=2)) | |
if ("awslogs" in event): | |
message, log_group = get_events(event['awslogs']['data']) | |
slack = SlackWrapper(log_group) | |
return slack.post(message) | |
else: | |
raise Exception('ERROR: not a cloudwatch logs event') |
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