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First public commit incl. Drone integration

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Stefan Reimer 2019-05-08 11:51:48 +00:00
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kind: pipeline
name: default
steps:
- name: test
image: python:3.7-alpine
commands:
- pip install -r dev-requirements.txt
- which make || apk add make
- make test
- name: build
image: python:3.7-alpine
commands:
- which make || apk add make
- which zip || apk add zip
- make build
- name: upload
image: python:3.7-alpine
environment:
AWS_ACCESS_KEY_ID:
from_secret: aws_access_key
AWS_SECRET_ACCESS_KEY:
from_secret: aws_secret_key
commands:
- which make || apk add make
- which aws || pip install awscli
- make upload
when:
event:
- tag

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# Vim
*.swp
# Byte-compiled / optimized / DLL files
__pycache__/
*.py[cod]
*$py.class
# C extensions
*.so
# Distribution / packaging
.Python
env/
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib64/
parts/
sdist/
prof/
var/
*.egg-info/
.installed.cfg
*.egg
# PyInstaller
# Usually these files are written by a python script from a template
# before PyInstaller builds the exe, so as to inject date/other infos into it.
*.manifest
*.spec
# Installer logs
pip-log.txt
pip-delete-this-directory.txt
# Unit test / coverage reports
htmlcov/
.tox/
.coverage
.coverage.*
.cache
.pytest*
nosetests.xml
coverage.xml
*,cover
.hypothesis/
# Translations
*.mo
*.pot
# dotenv
.env
# virtualenv
venv/
ENV/

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# Changelog
## 0.8.6
- added feature to resolve the AWS AccountID to account alias
enabled by default, can be disabled via os.env `RESOLVE_ACCOUNT`
## 0.8.5
- initial public release

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GNU Affero General Public License
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_END OF TERMS AND CONDITIONS_
## How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the “copyright” line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a “Source” link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a “copyright disclaimer” for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
&lt;<http://www.gnu.org/licenses/>&gt;.

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VERSION ?= $(shell grep '__version__' index.py | cut -d' ' -f3 | cut -d'-' -f1 | sed -e 's/"//g')
S3_BUCKETS ?= zero-downtime zero-downtime.us-west-2 zero-downtime.eu-central-1 zero-downtime.ap-southeast-2
S3_PREFIX ?= cloudbender/streamlogs2fluentd
PACKAGE_NAME = streamlogs2fluentd
PACKAGE := $(PACKAGE_NAME)-$(VERSION).zip
PACKAGE_FILE := dist/$(PACKAGE)
.PHONY: test clean build all upload clean_s3
all: test build
test:
flake8 --ignore=E501 index.py tests
TEST=True pytest --log-cli-level=DEBUG
clean:
rm -rf __pycache__ .cache .coverage .pytest_cache dist
build: $(PACKAGE_FILE)
$(PACKAGE_FILE):
rm -rf dist && mkdir dist
cp -r index.py dist/
pip install --target dist --no-compile msgpack requests
cd dist && zip -q -r $(PACKAGE) *
upload: $(PACKAGE_FILE)
for bucket in $(S3_BUCKETS); do \
aws s3 cp --acl public-read $(PACKAGE_FILE) s3://$$bucket/$(S3_PREFIX)/latest.zip; \
aws s3 cp --acl public-read $(PACKAGE_FILE) s3://$$bucket/$(S3_PREFIX)/$(PACKAGE); \
done
clean_s3:
for bucket in $(S3_BUCKETS); do \
aws s3 rm --recursive --exclude "*" --include latest.zip --include $(PACKAGE_NAME)-*.zip s3://$$bucket/$(S3_PREFIX); \
done

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[![Build Status](https://drone.zero-downtime.net/api/badges/ZeroDownTime/streamlogs2fluentd/status.svg)](https://drone.zero-downtime.net/ZeroDownTime/streamlogs2fluentd)
# streamlogs2fluentd
# About
Lambda function to parse and forward log events from various AWS sources to Fluentd.
# Features
- sends events to upstream fluentd encoded as msg_pack to a http_in endpoint
- sends events in chunks up to 128 events
Example Fluentd endpoint config:
```
<source>
@type http
</source>
```
# Available parsers
## CloudWatch Logs
### Lambda
### Cloudtrail
### RDS metrics
## S3
### Cloudfront Access Logs
### ALB Access Logs

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boto3
msgpack
requests
flake8
pytest
cfnlambda
awscli
#pytest-profiling
#tuna

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#!/usr/bin/env python
import base64
import requests
import gzip
import json
import msgpack
import struct
import os
import shutil
import re
import logging
import time
import io
import urllib
import datetime
import boto3
__author__ = "Stefan Reimer"
__author_email__ = "stefan@zero-downtime.net"
__version__ = "0.9.0"
# Global alias lookup cache
account_aliases = {}
logger = logging.getLogger(__name__)
logging.getLogger("urllib3").setLevel(logging.WARNING)
logging.getLogger('boto3').setLevel(logging.WARNING)
logging.getLogger('botocore').setLevel(logging.WARNING)
def boolean(value):
if value in ('t', 'T', 'true', 'True', 'TRUE', '1', 1, True):
return True
return False
# Decrypt encrypted URL with KMS
def decrypt(encrypted):
try:
kms = boto3.client('kms')
plaintext = kms.decrypt(CiphertextBlob=base64.b64decode(encrypted))['Plaintext']
return plaintext.decode()
except Exception:
logging.exception("Failed to decrypt via KMS")
CHUNK_SIZE = 128
DEBUG = boolean(os.getenv('DEBUG', default=False))
TEST = boolean(os.getenv('TEST', default=False))
RESOLVE_ACCOUNT = boolean(os.getenv('RESOLVE_ACCOUNT', default=True))
if DEBUG:
logging.getLogger().setLevel(logging.DEBUG)
else:
logging.getLogger().setLevel(logging.INFO)
# From fluent/fluent-logger-python
class EventTime(msgpack.ExtType):
def __new__(cls, timestamp):
seconds = int(timestamp)
nanoseconds = int(timestamp % 1 * 10 ** 9)
return super(EventTime, cls).__new__(
cls,
code=0,
data=struct.pack(">II", seconds, nanoseconds),
)
def fluentd_time(timestamp):
if isinstance(timestamp, float):
return EventTime(timestamp)
else:
return int(timestamp)
def get_source(region, account_id):
""" returns a new base source object
resolves aws account_id to account alias and caches for lifetime of lambda function
"""
source = {'account': account_id, 'region': region}
if RESOLVE_ACCOUNT and not TEST:
try:
if account_id not in account_aliases:
iam = boto3.client('iam')
account_aliases[account_id] = iam.list_account_aliases()['AccountAliases'][0]
source['account_alias'] = account_aliases[account_id]
except(KeyError, IndexError):
logger.warning("Could not resolve IAM account alias")
pass
return source
class Queue:
url = urllib.parse.urlsplit(os.getenv('FLUENTD_URL', default=None))
passwd = os.getenv('FLUENT_SHARED_KEY', default=None)
verify_certs = os.getenv('FLUENTD_VERIFY_CERTS', default=1)
if verify_certs in ('f', 'F', 'false', 'False', 'FALSE', '0', 0, False):
verify_certs = False
else:
verify_certs = True
# cached request session
request = requests.Session()
request.headers = {"Content-type": "application/msgpack"}
if passwd:
request.auth = ("fluent", passwd)
def __init__(self, tag):
self._queue = []
self.tag = tag
self.sent = 0
def send(self, event):
self._queue.append(event)
logger.debug("Queued {} event: {}".format(self.tag, event))
# Send events in chunks
if len(self._queue) >= CHUNK_SIZE:
self.flush()
def flush(self):
events = len(self._queue)
if not events:
return
logger.debug("Sending {} events to {}/{} ({})".format(events, self.url.geturl(), self.tag, self.request))
if not TEST:
# Send events via POSTs reusing the same https connection, retry couple of times
retries = 0
_url = '{}/{}'.format(self.url.geturl(), self.tag)
while True:
try:
r = self.request.post(url=_url, data=msgpack.packb(self._queue), verify=self.verify_certs)
if r.status_code == 200:
break
# Log request exceptions, retry after
except requests.RequestException as e:
logger.warning("Request exception: {}".format(e))
pass
if retries >= 5:
raise Exception("Error sending {} events to {}. Giving up.".format(events, _url))
retries = retries + 1
logger.warning("Error sending {} events to {}. Retrying in {} seconds.".format(events, _url, retries**2))
time.sleep(retries**2)
else:
logger.debug("Test mode, dump only: {}".format(msgpack.packb(self._queue)))
self.sent = self.sent + events
self._queue = []
def info(self):
logger.info("Sent {} events to {}/{} ({})".format(self.sent, self.url.geturl(), self.tag, self.request))
# Handler to handle CloudWatch logs.
def handler(event, context):
logger.debug("Event received: {}".format(event))
(region, account_id) = context.invoked_function_arn.split(":")[3:5]
# Cloudwatch Logs event
if 'awslogs' in event:
# Grab the base64-encoded data.
b64strg = event['awslogs']['data']
# Decode base64-encoded string, which should be a gzipped object.
zippedContent = io.BytesIO(base64.b64decode(b64strg))
# Decompress the content and load JSON.
with gzip.GzipFile(mode='rb', fileobj=zippedContent) as content:
for line in content:
awsLogsData = json.loads(line.decode())
# First determine type
if re.match("/aws/lambda/", awsLogsData['logGroup']):
logs = Queue("aws.lambda")
elif re.search("cloudtrail", awsLogsData['logGroup'], flags=re.IGNORECASE):
logs = Queue("aws.cloudtrail")
elif re.match("RDSOSMetrics", awsLogsData['logGroup']):
logs = Queue("aws.rdsosmetrics")
else:
logs = Queue("aws.cloudwatch_logs")
# Build list of log events
for e in awsLogsData['logEvents']:
event = {}
source = get_source(region, account_id)
parsed = {}
# inject existing data from subscrition filters
if('extractedFields' in e.keys()):
for key in e['extractedFields']:
event[key] = e['extractedFields'][key]
# lambda ?
if logs.tag == 'aws.lambda':
# First look for the three AWS Lambda entries
mg = re.match(r'(?P<type>(START|END|REPORT)) RequestId: (?P<request>\S*)', e['message'])
if mg:
parsed['RequestId'] = mg.group('request')
if mg.group('type') == 'REPORT':
pattern = r'.*(?:\tDuration: (?P<duration>[\d\.\d]+) ms\s*)(?:\tBilled Duration: (?P<billed_duration>[\d\.\d]+) ms\s*)(?:\tMemory Size: (?P<memory_size>[\d\.\d]+) MB\s*)(?:\tMax Memory Used: (?P<max_memory_used>[\d\.\d]+) MB)'
elif mg.group('type') == 'START':
pattern = r'.*(?:Version: (?P<version>.*))'
else:
pattern = ''
data = re.match(pattern, e['message'])
for key in data.groupdict().keys():
parsed[key] = data.group(key)
# All other info parsed, so just set type itself
event['message'] = mg.group('type')
else:
# Try to extract data from AWS default python logging format
# This normalizes print vs. logging entries and allows requestid tracking
# "[%(levelname)s]\t%(asctime)s.%(msecs)dZ\t%(aws_request_id)s\t%(message)s\n"
_msg = e['message']
pattern = r'(?:\[(?P<level>[^\]]*)\])\t(?P<time>.*?)\t(?P<RequestId>\S*?)\t(?P<message>.*)'
data = re.match(pattern, e['message'])
if data:
event['level'] = data.group('level')
parsed['RequestId'] = data.group('RequestId')
_msg = data.group('message')
# try to parse the remaining as json
try:
_json = json.loads(_msg)
# Make sure we have an actual object assigned to json field
if isinstance(_json, dict):
event['message_json'] = _json
else:
event['message'] = _json
except (ValueError, TypeError, KeyError):
event['message'] = _msg
# cloudtrail ?
elif logs.tag == 'aws.cloudtrail':
try:
parsed = json.loads(e['message'])
# use eventTime and eventID from the event itself
event['time'] = fluentd_time(time.mktime(datetime.datetime.strptime(parsed['eventTime'], '%Y-%m-%dT%H:%M:%SZ').timetuple()))
event['id'] = parsed['eventID']
# override region from cloudtrail event
source['region'] = parsed['awsRegion']
except (ValueError, TypeError, KeyError):
event['message'] = e['message']
parsed.clear()
# RDS metrics ?
elif logs.tag == 'aws.rdsosmetrics':
try:
parsed = json.loads(e['message'])
except (ValueError, TypeError, KeyError):
event['message'] = e['message']
# Fallback add raw message
else:
event['message'] = e['message']
if parsed and logs.tag:
event[logs.tag] = parsed
# Forward cloudwatch logs event ID
source['log_group'] = awsLogsData['logGroup']
source['log_stream'] = awsLogsData['logStream']
event['source'] = source
# If time and id are not set yet use data from cloudwatch logs event
if 'time' not in event:
event['time'] = fluentd_time(e['timestamp'] / 1000)
if 'id' not in source:
event['id'] = e['id']
logs.send(event)
logs.flush()
logs.info()
# S3 Put event
elif 'Records' in event:
s3_client = boto3.client('s3')
bucket = event['Records'][0]['s3']['bucket']['name']
key = event['Records'][0]['s3']['object']['key']
file_path = '/tmp/stream2fluentd.gz'
if TEST:
shutil.copyfile(key, file_path)
else:
s3_client.download_file(bucket, key, file_path)
source = get_source(region, account_id)
source['s3_url'] = '{}/{}'.format(bucket, key)
# try to identify file by looking at first two lines
first = ""
second = ""
try:
with gzip.open(file_path, mode='rt', newline='\n') as data:
first = next(data)
second = next(data)
except (OSError, StopIteration):
logger.warning("{}/{}: Unknown type!".format(bucket, key))
return
alb_regex = re.compile(r"(?P<type>[^ ]*) (?P<timestamp>[^ ]*) (?P<elb>[^ ]*) (?P<client_ip>[^ ]*):(?P<client_port>[0-9]*) (?P<target_ip>[^ ]*)[:-](?P<target_port>[0-9]*) (?P<request_processing_time>[-.0-9]*) (?P<target_processing_time>[-.0-9]*) (?P<response_processing_time>[-.0-9]*) (?P<elb_status_code>|[-0-9]*) (?P<target_status_code>-|[-0-9]*) (?P<received_bytes>[-0-9]*) (?P<sent_bytes>[-0-9]*) \"(?P<request_verb>[^ ]*) (?P<request_url>[^ ]*) (?P<request_proto>- |[^ ]*)\" \"(?P<user_agent>[^\"]*)\" (?P<ssl_cipher>[A-Z0-9-]+) (?P<ssl_protocol>[A-Za-z0-9.-]*) (?P<target_group_arn>[^ ]*) \"(?P<trace_id>[^\"]*)\" \"(?P<domain_name>[^\"]*)\" \"(?P<chosen_cert_arn>[^\"]*)\" (?P<matched_rule_priority>[-.0-9]*) (?P<request_creation_time>[^ ]*) \"(?P<actions_executed>[^\"]*)\" \"(?P<redirect_url>[^ ]*)\" \"(?P<error_reason>[^ ]*)\"")
# cloudfront access logs
if re.match('#Version:', first) and re.match('#Fields:', second):
logs = Queue("aws.cloudfront")
with gzip.open(file_path, mode='rt', newline='\n') as data:
next(data)
# columns are in second line: first is #Fields, next two are merged into time later
columns = next(data).split()[3:]
for line in data:
event = {}
parsed = {}
# Todo hash each line to create source['id']
# source['id'] = md5.of.line matching ES ids
row = line.split('\t')
# cloudfront events are logged to the second only, date and time are seperate
event['time'] = fluentd_time(time.mktime(datetime.datetime.strptime(row[0] + " " + row[1], '%Y-%m-%d %H:%M:%S').timetuple()))
for n, c in enumerate(columns, 2):
value = row[n]
if value not in ['-', '-\n']:
parsed[c] = row[n]
# Copy c-ip to host to allow geoip upstream
if c == 'c-ip':
event['host'] = row[n]
event[logs.tag] = parsed
event['source'] = source
logs.send(event)
elif alb_regex.match(first):
logs = Queue("aws.alb_accesslog")
with gzip.open(file_path, mode='rt', newline='\n') as data:
for line in data:
event = {}
parsed = {}
data = alb_regex.match(line)
if data:
for key in data.groupdict().keys():
value = data.group(key)
# Remove empty values
if value in ['-', '-\n']:
continue
# Remove times of requests timed out
if key in ['request_processing_time', 'target_processing_time', 'response_processing_time'] and value in ['-1']:
continue
parsed[key] = data.group(key)
else:
logger.warning("Could not parse ALB access log entry: {}".format(line))
continue
event['time'] = fluentd_time(time.mktime(datetime.datetime.strptime(parsed['request_creation_time'], '%Y-%m-%dT%H:%M:%S.%fZ').timetuple()))
# Copy to host to allow geoip upstream
event['host'] = parsed['client_ip']
event[logs.tag] = parsed
event['source'] = source
logs.send(event)
else:
logs = Queue("unknown")
logs.flush()
logs.info()

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boto3
msgpack
requests

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#!/usr/bin/env python
import os
import sys
import logging
import json
import index
from .utils import FakeLambdaContext
# First allow relative imports in main
foo_dir = os.path.dirname(os.path.join(os.getcwd(), __file__))
sys.path.append(os.path.normpath(os.path.join(foo_dir, '..')))
context = FakeLambdaContext()
logger = logging.getLogger(__name__)
logging.getLogger().setLevel(logging.DEBUG)
ch = logging.StreamHandler()
logger.addHandler(ch)
logging.getLogger("index").addHandler(ch)
logging.getLogger("index").setLevel(logging.DEBUG)
def test_parse():
# Test Cloudwatch Logs
event = json.loads('{"awslogs": {"data": "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" } }')
index.handler(event, context)
# Cloudfront Access Logs via S3
event = json.loads('{ "Records": [ { "eventVersion": "2.0", "eventTime": "1970-01-01T00:00:00.000Z", "requestParameters": { "sourceIPAddress": "127.0.0.1" }, "s3": { "configurationId": "testConfigRule", "object": { "eTag": "0123456789abcdef0123456789abcdef", "sequencer": "0A1B2C3D4E5F678901", "key": "tests/test_cloudfront.gz", "size": 1024 }, "bucket": { "arn": "arn:aws:s3:::mybucket", "name": "file://", "ownerIdentity": { "principalId": "EXAMPLE" } }, "s3SchemaVersion": "1.0" }, "responseElements": { "x-amz-id-2": "EXAMPLE123/5678abcdefghijklambdaisawesome/mnopqrstuvwxyzABCDEFGH", "x-amz-request-id": "EXAMPLE123456789" }, "awsRegion": "us-east-1", "eventName": "ObjectCreated:Put", "userIdentity": { "principalId": "EXAMPLE" }, "eventSource": "aws:s3" } ] }')
index.handler(event, context)
# alb Access Logs via S3
event = json.loads('{ "Records": [ { "eventVersion": "2.0", "eventTime": "1970-01-01T00:00:00.000Z", "requestParameters": { "sourceIPAddress": "127.0.0.1" }, "s3": { "configurationId": "testConfigRule", "object": { "eTag": "0123456789abcdef0123456789abcdef", "sequencer": "0A1B2C3D4E5F678901", "key": "tests/test_alb_accesslogs.gz", "size": 1024 }, "bucket": { "arn": "arn:aws:s3:::mybucket", "name": "file://", "ownerIdentity": { "principalId": "EXAMPLE" } }, "s3SchemaVersion": "1.0" }, "responseElements": { "x-amz-id-2": "EXAMPLE123/5678abcdefghijklambdaisawesome/mnopqrstuvwxyzABCDEFGH", "x-amz-request-id": "EXAMPLE123456789" }, "awsRegion": "us-east-1", "eventName": "ObjectCreated:Put", "userIdentity": { "principalId": "EXAMPLE" }, "eventSource": "aws:s3" } ] }')
index.handler(event, context)

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import json
import logging
from cfnlambda import validate_response_data, Status
logger = logging.getLogger(__name__)
logger.addHandler(logging.NullHandler())
BaseEvent = {
"StackId": "arn:aws:cloudformation:us-west-2:123456789:stack/test_stack_name/guid",
"ResponseURL": "http://pre-signed-S3-url-for-response",
"ResourceType": "Custom::TestResource",
"RequestId": "unique id for this create request",
"LogicalResourceId": "MyTestResource"
}
class FakeLambdaContext(object):
def __init__(self, name='Fake', version='LATEST'):
self.name = name
self.version = version
self.response_body = None
@property
def get_remaining_time_in_millis(self):
return 10000
@property
def function_name(self):
return self.name
@property
def function_version(self):
return self.version
@property
def invoked_function_arn(self):
return 'arn:aws:lambda:us-west-2:231435876663:function:' + self.name
@property
def memory_limit_in_mb(self):
return 1024
@property
def aws_request_id(self):
return '1234567890'
@property
def log_stream_name(self):
return 'ReallyFakeLogStream'
# Copied from cfn_lambda for cmdline tests
# Does NOT actually try issue a request
def mocked_cfn_response(event, context, response_status, response_data={}, physical_resource_id=None):
if physical_resource_id is None:
physical_resource_id = context.log_stream_name
response_data = validate_response_data(response_data)
reason = ("See the details in CloudWatch Log Stream: %s" %
context.log_stream_name)
if (response_status == Status.FAILED) and 'result' in response_data:
reason = "%s %s" % (response_data['result'], reason)
body = {
"Status": response_status,
"Reason": reason,
"PhysicalResourceId": physical_resource_id,
"StackId": event['StackId'],
"RequestId": event['RequestId'],
"LogicalResourceId": event['LogicalResourceId'],
"Data": response_data
}
response_body = json.dumps(body)
logger.info("CFN_RESPONSE would be: %s", response_body)
context.response_body = body