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marbot-nat-gateway.yml
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marbot-nat-gateway.yml
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---
# Copyright widdix GmbH
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
AWSTemplateFormatVersion: '2010-09-09'
Description: 'marbot.io: NAT gateway monitoring (https://github.com/marbot-io/monitoring-jump-start)'
Metadata:
'AWS::CloudFormation::Interface':
ParameterGroups:
- Label:
default: 'marbot endpoint'
Parameters:
- EndpointId
- Stage
- Label:
default: 'NAT Gateway'
Parameters:
- NatGatewayId
- Label:
default: 'Thresholds'
Parameters:
- ErrorPortAllocationThreshold
- PacketsDropCountThreshold
- BandwidthUtilizationThreshold
- PacketsUtilizationThreshold
Parameters:
EndpointId:
Description: 'Your marbot endpoint ID (to get this value: select a channel where marbot belongs to and send a message like this: "@marbot show me my endpoint id").'
Type: String
Stage:
Description: 'marbot stage (never change this!).'
Type: String
Default: v1
AllowedValues: [v1, dev]
NatGatewayId:
Description: 'The NAT gateway ID that you want to monitor.'
Type: String
ErrorPortAllocationThreshold:
Description: 'The maximum port allocation errors (set to -1 to disable).'
Type: Number
Default: 0
MinValue: -1
PacketsDropCountThreshold:
Description: 'The maximum packet drops (set to -1 to disable).'
Type: Number
Default: 0
MinValue: -1
BandwidthUtilizationThreshold:
Description: 'The maximum percentage of bandwidth utilization (set to -1 to disable).'
Type: Number
Default: 80
MinValue: -1
MaxValue: 100
PacketsUtilizationThreshold:
Description: 'The maximum percentage of packets utilization (set to -1 to disable).'
Type: Number
Default: 80
MinValue: -1
MaxValue: 100
Conditions:
HasErrorPortAllocationThreshold: !Not [!Equals [!Ref ErrorPortAllocationThreshold, '-1']]
HasPacketsDropCountThreshold: !Not [!Equals [!Ref PacketsDropCountThreshold, '-1']]
HasBandwidthUtilizationThreshold: !Not [!Equals [!Ref BandwidthUtilizationThreshold, '-1']]
HasPacketsUtilizationThreshold: !Not [!Equals [!Ref PacketsUtilizationThreshold, '-1']]
Resources:
##########################################################################
# #
# TOPIC #
# #
##########################################################################
Topic:
Type: 'AWS::SNS::Topic'
Properties: {}
TopicPolicy:
Type: 'AWS::SNS::TopicPolicy'
Properties:
PolicyDocument:
Id: Id1
Version: '2012-10-17'
Statement:
- Sid: Sid1
Effect: Allow
Principal:
Service: 'events.amazonaws.com' # Allow EventBridge
Action: 'sns:Publish'
Resource: !Ref Topic
- Sid: Sid2
Effect: Allow
Principal:
AWS: '*' # Allow CloudWatch Alarms
Action: 'sns:Publish'
Resource: !Ref Topic
Condition:
StringEquals:
'AWS:SourceOwner': !Ref 'AWS::AccountId'
Topics:
- !Ref Topic
TopicEndpointSubscription:
DependsOn: TopicPolicy
Type: 'AWS::SNS::Subscription'
Properties:
DeliveryPolicy:
healthyRetryPolicy:
minDelayTarget: 1
maxDelayTarget: 60
numRetries: 100
numNoDelayRetries: 0
backoffFunction: exponential
throttlePolicy:
maxReceivesPerSecond: 1
Endpoint: !Sub 'https://api.marbot.io/${Stage}/endpoint/${EndpointId}'
Protocol: https
TopicArn: !Ref Topic
MonitoringJumpStartEvent:
DependsOn: TopicEndpointSubscription
Type: 'AWS::Events::Rule'
Properties:
Description: 'Monitoring Jump Start connection. (created by marbot)'
ScheduleExpression: 'rate(30 days)'
State: ENABLED
Targets:
- Arn: !Ref Topic
Id: marbot
Input: !Sub |
{
"Type": "monitoring-jump-start-connection",
"StackTemplate": "marbot-nat-gateway",
"StackVersion": "1.0.1",
"Partition": "${AWS::Partition}",
"AccountId": "${AWS::AccountId}",
"Region": "${AWS::Region}",
"StackId": "${AWS::StackId}",
"StackName": "${AWS::StackName}"
}
##########################################################################
# #
# ALARMS #
# #
##########################################################################
ErrorPortAllocationTooHighAlarm:
Condition: HasErrorPortAllocationThreshold
DependsOn: TopicEndpointSubscription
Type: 'AWS::CloudWatch::Alarm'
Properties:
AlarmActions:
- !Ref Topic
AlarmDescription: 'Errors allocating a source port over last 10 minutes too high. Too many concurrent connections are open through the NAT gateway. (created by marbot)'
Namespace: 'AWS/NATGateway'
MetricName: ErrorPortAllocation
Statistic: Sum
Period: 600
EvaluationPeriods: 1
ComparisonOperator: GreaterThanThreshold
Threshold: !Ref ErrorPortAllocationThreshold
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
PacketsDropCountTooHighAlarm:
Condition: HasPacketsDropCountThreshold
DependsOn: TopicEndpointSubscription
Type: 'AWS::CloudWatch::Alarm'
Properties:
AlarmActions:
- !Ref Topic
AlarmDescription: 'Dropped packets over last 10 minutes too high. This might indicate an ongoing transient issue with the NAT gateway. (created by marbot)'
Namespace: 'AWS/NATGateway'
MetricName: PacketsDropCount
Statistic: Sum
Period: 600
EvaluationPeriods: 1
ComparisonOperator: GreaterThanThreshold
Threshold: !Ref PacketsDropCountThreshold
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
BandwidthUtilizationTooHighAlarm:
Condition: HasBandwidthUtilizationThreshold
DependsOn: TopicEndpointSubscription
Type: 'AWS::CloudWatch::Alarm'
Properties:
AlarmActions:
- !Ref Topic
AlarmDescription: 'Bandwidth utilization too high. (created by marbot)'
ComparisonOperator: GreaterThanThreshold
EvaluationPeriods: 1
Metrics:
- Id: 'in1'
Label: 'InFromDestination'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: BytesInFromDestination # bytes per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Bytes
ReturnData: false
- Id: 'in2'
Label: 'InFromSource'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: BytesInFromSource # bytes per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Bytes
ReturnData: false
- Id: 'out1'
Label: 'OutToDestination'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: BytesOutToDestination # bytes per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Bytes
ReturnData: false
- Id: 'out2'
Label: 'OutToSource'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: BytesOutToSource # bytes per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Bytes
ReturnData: false
- Expression: '(in1+in2+out1+out2)/60*8/1000/1000/1000' # to Gbit/s
Id: 'bandwidth'
Label: 'Bandwidth'
ReturnData: false
- Expression: 'bandwidth/100*100' # hard limit is 100 Gbit/s
Id: 'utilization'
Label: 'Utilization'
ReturnData: true
Threshold: !Ref BandwidthUtilizationThreshold
TreatMissingData: notBreaching
PacketsUtilizationTooHighAlarm:
Condition: HasPacketsUtilizationThreshold
DependsOn: TopicEndpointSubscription
Type: 'AWS::CloudWatch::Alarm'
Properties:
AlarmActions:
- !Ref Topic
AlarmDescription: 'Packets utilization too high. (created by marbot)'
ComparisonOperator: GreaterThanThreshold
EvaluationPeriods: 1
Metrics:
- Id: 'in1'
Label: 'InFromDestination'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: PacketsInFromDestination # packets per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Count
ReturnData: false
- Id: 'in2'
Label: 'InFromSource'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: PacketsInFromSource # packets per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Count
ReturnData: false
- Id: 'out1'
Label: 'OutToDestination'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: PacketsOutToDestination # packets per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Count
ReturnData: false
- Id: 'out2'
Label: 'OutToSource'
MetricStat:
Metric:
Namespace: 'AWS/NATGateway'
MetricName: PacketsOutToSource # packets per minute
Dimensions:
- Name: NatGatewayId
Value: !Ref NatGatewayId
Period: 60
Stat: Sum
Unit: Count
ReturnData: false
- Expression: '(in1+in2+out1+out2)/60' # to packets per second
Id: 'packets'
Label: 'Packets'
ReturnData: false
- Expression: 'packets/10000000*100' # hard limit is 10,000,000 packets per second
Id: 'utilization'
Label: 'Utilization'
ReturnData: true
Threshold: !Ref PacketsUtilizationThreshold
TreatMissingData: notBreaching
Outputs:
StackName:
Description: 'Stack name.'
Value: !Sub '${AWS::StackName}'
StackTemplate:
Description: 'Stack template.'
Value: 'marbot-nat-gateway'
StackVersion:
Description: 'Stack version.'
Value: '1.0.1'