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AwsCrossRegionVPN-datadog.template
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AwsCrossRegionVPN-datadog.template
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{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "Openswan HA vpn",
"Metadata": {
"AWS::CloudFormation::Interface" : {
"ParameterGroups" : [
{
"Label" : { "default" : "Instance Configuration" },
"Parameters" : [ "InstanceType", "InstanceKey", "InstanceVpc", "InstanceSubnet", "PublicIpAllocId", "InstancePublicIP" ]
},
{
"Label" : { "default" : "Environment and Monitoring" },
"Parameters" : [ "Environment", "SnsAlarmNotificationTopicARN", "DatadogApiKey" ]
},
{
"Label" : { "default" : "AWS VPN Connection Details " },
"Parameters" : [ "RemoteVpcCidr", "LocalVpcCidr", "Tunnel1PublicIP", "Tunnel1PreSharedKey", "Tunnel2PublicIP", "Tunnel2PreSharedKey", "VpnHealthCheckTargetIp1", "VpnHealthCheckTargetIp2" ]
}
]
}
},
"Parameters": {
"InstanceType": {
"Description": "Instance type for the vpn instance",
"Type": "String",
"Default" : "c4.large",
"AllowedValues": ["t2.small","t2.medium","t2.large","t2.xlarge","t2.2xlarge","m4.large","m4.xlarge","m4.2xlarge","m4.4xlarge","m4.10xlarge","m4.16xlarge","m3.medium","m3.large","m3.xlarge","m3.2xlarge","c4.large","c4.xlarge","c4.2xlarge","c4.4xlarge","c4.8xlarge","c3.large","c3.xlarge","c3.2xlarge","c3.4xlarge","c3.8xlarge","g2.2xlarge","g2.8xlarge","p2.xlarge","p2.8xlarge","p2.16xlarge","r4.large","r4.xlarge","r4.2xlarge","r4.4xlarge","r4.8xlarge","r4.16xlarge","r3.large","r3.xlarge","r3.2xlarge","r3.4xlarge","r3.8xlarge","x1.16xlarge","x1.32xlarge","d2.xlarge","d2.2xlarge","d2.4xlarge","d2.8xlarge","i2.xlarge","i2.2xlarge","i2.4xlarge","i2.8xlarge"],
"ConstraintDescription" : "Must be a valid EC2 instance type."
},
"InstanceKey": {
"Description" : "Name of an existing EC2 KeyPair to enable SSH access to the instances",
"Type" : "AWS::EC2::KeyPair::KeyName"
},
"InstanceVpc": {
"Description" : "Vpc where the instance will be lounced, should be inside the vpc you want to connect",
"Type": "AWS::EC2::VPC::Id"
},
"InstanceSubnet" : {
"Description" : "Subnet where the instance will be lounched, should be inside the vpc you want to connect",
"Type": "AWS::EC2::Subnet::Id"
},
"PublicIpAllocId": {
"Description": "Allocation ID of the Elastic IP that will be used",
"Type": "String"
},
"InstancePublicIP": {
"Description": "The IP of the PublicIpAllocId you specified before",
"Type": "String"
},
"Environment" :{
"Type": "String",
"AllowedValues": ["Production", "Staging", "Test"],
"Default": "Production"
},
"RemoteVpcCidr": {
"Type": "String",
"Description": "The CIDR of the VPC you want to connect to"
},
"LocalVpcCidr": {
"Type": "String",
"Description": "The CIDR of the local VPC"
},
"Tunnel1PublicIP": {
"Type": "String",
"Description": "The public IP of the tunnel1 on the AWS VPN connection, usually noted as \"right\" in the tunnel1 configuration file provided by aws"
},
"Tunnel1PreSharedKey": {
"Type": "String",
"Description": "PreShared Key (PSK) for the Tunnel1"
},
"Tunnel2PublicIP": {
"Type": "String",
"Description": "The public IP of the tunnel2 on the AWS VPN connection, usually noted as \"right\" in the tunnel2 configuration file provided by aws"
},
"Tunnel2PreSharedKey": {
"Type": "String",
"Description": "PreShared Key (PSK) for the Tunnel2"
},
"VpnHealthCheckTargetIp1": {
"Type": "String",
"Description": "The target IP to use for determing tunnel health. This should be a stable private IP in the remote network over the tunnel that that is responsive to ping at all times."
},
"VpnHealthCheckTargetIp2": {
"Type": "String",
"Description": "The target IP to use for determing tunnel health. This should be a stable private IP in the remote network over the tunnel that that is responsive to ping at all times."
},
"SnsAlarmNotificationTopicARN" : {
"Type": "String",
"Description": "ARN of the SNS topic to publish alerts"
},
"DatadogApiKey": {
"Type": "String",
"Description": "The Datadog key used to install datadog agent"
}
},
"Mappings": {
"Region" : {
"us-west-2" : {
"AmiID" : "ami-1e299d7e"
},
"us-east-1" : {
"AmiID" : "ami-9be6f38c"
}
}
},
"Resources": {
"VpnSecurityGroup": {
"Type" : "AWS::EC2::SecurityGroup",
"Properties" : {
"GroupDescription" : { "Fn::Join" : [ "", ["Security group for the vpn ", {"Ref" : "AWS::StackName" }]]},
"SecurityGroupEgress" : [
{ "IpProtocol" : "-1", "FromPort" : "0", "ToPort" : "65535", "CidrIp" : "0.0.0.0/0" }
],
"SecurityGroupIngress" : [
{ "IpProtocol" : "-1", "FromPort" : "0", "ToPort" : "65535", "CidrIp" : {"Fn::Join" : [ "", [{ "Ref" : "Tunnel1PublicIP" }, "/32"]]} },
{ "IpProtocol" : "-1", "FromPort" : "0", "ToPort" : "65535", "CidrIp" : {"Fn::Join" : [ "", [{ "Ref" : "Tunnel2PublicIP" }, "/32"]]} },
{ "IpProtocol" : "-1", "FromPort" : "0", "ToPort" : "65535", "CidrIp" : { "Ref" : "LocalVpcCidr" }}
],
"Tags" : [{
"Key": "Environment",
"Value": { "Ref": "Environment" }
},{
"Key": "Name",
"Value": { "Ref": "AWS::StackName" }
}],
"VpcId" : { "Ref": "InstanceVpc" }
}
},
"VpnInstanceRole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Statement": [ {
"Effect": "Allow",
"Principal": {
"Service": [ "ec2.amazonaws.com" ]
},
"Action": [ "sts:AssumeRole" ]
} ]
},
"Path": "/",
"Policies": [ {
"PolicyName": "VpnCloudwatchLogs",
"PolicyDocument": {
"Statement": [ {
"Effect": "Allow",
"Action": [
"cloudwatch:PutMetricData"
],
"Resource": "*"
} ]
}
} ]
}
},
"VpnInstanceProfile": {
"Type": "AWS::IAM::InstanceProfile",
"Properties": {
"Path": "/",
"Roles": [ {
"Ref": "VpnInstanceRole"
} ]
}
},
"VpnInstance" : {
"Type" : "AWS::EC2::Instance",
"Metadata" : {
"AWS::CloudFormation::Init" : {
"configSets" : {
"VpnConfig" : [ "Install", "Configure" ]
},
"Install": {
"packages" : {
"yum": {
"openswan": []
}
},
"files": {
"/etc/init.d/vpn-health-checker": {
"source": "https://raw.githubusercontent.com/clmoreno/AWS-Cross-Region-VPN/master/vpn-health-checker",
"mode": "000755",
"owner": "root",
"group": "root"
}
},
"commands": {
"01-install-datadog": {
"command": {"Fn::Join" : ["",[
"DD_API_KEY=", { "Ref": "DatadogApiKey" }, " bash -c \"$(curl -L https://raw.githubusercontent.com/DataDog/dd-agent/master/packaging/datadog-agent/source/install_agent.sh)\""
] ]}
}
}
},
"Configure": {
"files": {
"/etc/ipsec.d/aws.secrets": {
"content" : { "Fn::Join" : ["", [
{ "Ref": "InstancePublicIP" }, " ", { "Ref": "Tunnel1PublicIP" }, ": PSK \"", { "Ref": "Tunnel1PreSharedKey" }, "\"\n",
{ "Ref": "InstancePublicIP" }, " ", { "Ref": "Tunnel2PublicIP" }, ": PSK \"", { "Ref": "Tunnel2PreSharedKey" }, "\"\n"
]]}
},
"/etc/ipsec.d/aws.conf": {
"content" : { "Fn::Join" : ["", [
"conn TunnelA\n",
" authby=secret\n",
" auto=start\n",
" left=%defaultroute\n",
" leftid=", { "Ref": "InstancePublicIP" }, "\n",
" right=", { "Ref": "Tunnel1PublicIP" }, "\n",
" type=tunnel\n",
" ikelifetime=8h\n",
" keylife=1h\n",
" phase2alg=aes128-sha1;modp1024\n",
" ike=aes128-sha1;modp1024\n",
" auth=esp\n",
" keyingtries=%forever\n",
" keyexchange=ike\n",
" leftsubnet=0.0.0.0/0\n",
" rightsubnet=", { "Ref": "RemoteVpcCidr" }, "\n",
" dpddelay=10\n",
" dpdtimeout=30\n",
" dpdaction=restart_by_peer\n",
"\n",
"conn TunnelB\n",
" authby=secret\n",
" auto=start\n",
" left=%defaultroute\n",
" leftid=", { "Ref": "InstancePublicIP" }, "\n",
" right=", { "Ref": "Tunnel2PublicIP" }, "\n",
" type=tunnel\n",
" ikelifetime=8h\n",
" keylife=1h\n",
" phase2alg=aes128-sha1;modp1024\n",
" ike=aes128-sha1;modp1024\n",
" auth=esp\n",
" keyingtries=%forever\n",
" keyexchange=ike\n",
" leftsubnet=0.0.0.0/0\n",
" rightsubnet=", { "Ref": "RemoteVpcCidr" }, "\n",
" dpddelay=10\n",
" dpdtimeout=30\n",
" dpdaction=restart_by_peer\n"
]]}
},
"/etc/dd-agent/conf.d/process.yaml": {
"content" : { "Fn::Join" : ["", [
"init_config:\n",
"\n",
"instances:\n",
" - name: ipsec\n",
" search_string: ['pluto']\n",
" tags:\n",
" - Environment:", { "Ref": "Environment" }, "\n",
" - Role:VPN\n",
"\n",
" - name: vpn-health-checker\n",
" pid_file: /var/run/vpn-health-checker.pid\n",
" tags:\n",
" - Environment:", { "Ref": "Environment" }, "\n",
" - Role:VPN\n"
]]}
}
},
"commands": {
"01-ipsec-conf" : {
"command": "sed -i 's/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/g' /etc/sysctl.conf"
},
"02-ipsec-conf" : {
"command": "sed -i 's/net.ipv4.conf.default.rp_filter = 1/net.ipv4.conf.default.rp_filter = 0/g' /etc/sysctl.conf"
},
"03-ipsec-conf" : {
"command": "sed -i 's/net.ipv4.conf.default.accept_source_route = 1/net.ipv4.conf.default.accept_source_route = 0/g' /etc/sysctl.conf"
},
"04-ipsec-conf" : {
"command": "echo \"include /etc/ipsec.d/*.conf\" >> /etc/ipsec.conf"
},
"05-ipsec-conf" : {
"command": "for f in $(ls -1 /proc/sys/net/ipv4/conf/*/send_redirects); do echo 0 > ${f}; done"
},
"06-ipsec-conf" : {
"command": "for f in $(ls -1 /proc/sys/net/ipv4/conf/*/accept_redirects); do echo 0 > ${f}; done"
},
"07-ipsec-apply-changes" : {
"command": "sysctl -p"
},
"08-health-check-init": {
"command": "/etc/init.d/vpn-health-checker start"
},
"09-health-check-conf": {
"command": {"Fn::Join" : ["",[
"sed -i 's/target_ip_1=127.0.0.1/target_ip_1=", { "Ref": "VpnHealthCheckTargetIp1" }, "/g' /etc/vpn-health-checker/vpn-health-checker.conf"
] ]}
},
"10-health-check-conf": {
"command": {"Fn::Join" : ["",[
"sed -i 's/#target_ip_2=127.0.0.1/target_ip_2=", { "Ref": "VpnHealthCheckTargetIp2" }, "/g' /etc/vpn-health-checker/vpn-health-checker.conf"
] ]}
},
"11-health-check-conf": {
"command": {"Fn::Join" : ["",[
"sed -i 's/environment_identifier=VpnHA/environment_identifier=", { "Ref": "AWS::StackName" }, "/g' /etc/vpn-health-checker/vpn-health-checker.conf"
] ]}
},
"12-health-check-init": {
"command": "/etc/init.d/vpn-health-checker stop && /etc/init.d/vpn-health-checker start"
},
"12-datadog-restart" : {
"command": "/etc/init.d/datadog-agent restart"
}
},
"services": {
"sysvinit" :{
"ipsec": {
"enabled": "true",
"ensureRunning": "true"
},
"vpn-health-checker": {
"enabled": "true",
"ensureRunning": "true"
},
"datadog-agent": {
"enabled": "true",
"ensureRunning": "true"
}
}
}
}
}
},
"Properties":{
"ImageId": { "Fn::FindInMap" : [ "Region", { "Ref" : "AWS::Region" }, "AmiID" ] },
"InstanceType": { "Ref": "InstanceType" },
"KeyName": { "Ref": "InstanceKey" },
"SecurityGroupIds": [{ "Ref": "VpnSecurityGroup" }],
"SubnetId": { "Ref": "InstanceSubnet" },
"SourceDestCheck": "false",
"IamInstanceProfile" : { "Ref" : "VpnInstanceProfile" },
"Tags": [{
"Key": "Environment",
"Value": { "Ref": "Environment" }
},{
"Key": "Name",
"Value": { "Ref": "AWS::StackName" }
}],
"UserData": { "Fn::Base64" : { "Fn::Join" : ["", [
"#!/bin/bash -xe\n",
"yum update -y && yum upgrade -y\n",
"yum install -y aws-cfn-bootstrap\n",
"# Install the files and packages from the metadata\n",
"/opt/aws/bin/cfn-init ",
" --stack ", { "Ref" : "AWS::StackName" },
" --resource VpnInstance ",
" --configsets VpnConfig ",
" --region ", { "Ref" : "AWS::Region" }, "\n"
]]}}
}
},
"PublicIpAssociation" : {
"Type" : "AWS::EC2::EIPAssociation",
"Properties" : {
"InstanceId" : { "Ref" : "VpnInstance" },
"AllocationId" : { "Ref" : "PublicIpAllocId" }
}
},
"VpnClodWatchAlarm": {
"Type": "AWS::CloudWatch::Alarm",
"Properties": {
"AlarmName": { "Ref": "AWS::StackName" },
"AlarmDescription": {"Fn::Join" : ["",[ "VPN health check dected many erros on ", { "Ref": "AWS::StackName" } ] ]},
"MetricName": "VpnHealthCheckErrors",
"Namespace": "VPN",
"Dimensions" : [{
"Name": "VpnName",
"Value": { "Ref": "AWS::StackName" }
}],
"Statistic": "Sum",
"Period": "300",
"EvaluationPeriods": "1",
"Threshold": "0",
"AlarmActions": [
{"Ref": "SnsAlarmNotificationTopicARN"}
],
"OKActions": [
{"Ref": "SnsAlarmNotificationTopicARN"}
],
"InsufficientDataActions": [
{"Ref": "SnsAlarmNotificationTopicARN"}
],
"ComparisonOperator": "GreaterThanThreshold"
}
}
},
"Outputs": {
}
}