CF tested and working for EC2 deployment (#431)

* AWS CloudFormation #132

* IPv6 EC2 draft

* CF tested and working for EC2 deployment

* IPv6 Implementation, EC2, Cloudformation

* Fixed ipv6 networking

* adding ip6tables rule for DHCP on AWS

roles/cloud-ec2/tasks/cloudformation.yml

@@ -0,0 +1,18 @@
+---
+
+- name: Make a cloudformation template
+  template:
+    src: stack.yml.j2
+    dest: "configs/{{ aws_server_name }}.yml"
+
+- name: Deploy the template
+  cloudformation:
+    aws_access_key: "{{ aws_access_key | default(lookup('env','AWS_ACCESS_KEY_ID'), true)}}"
+    aws_secret_key: "{{ aws_secret_key | default(lookup('env','AWS_SECRET_ACCESS_KEY'), true)}}"
+    stack_name: "{{ stack_name }}"
+    state: "present"
+    region: "{{ region }}"
+    template: "configs/{{ aws_server_name }}.yml"
+    tags:
+      Environment: Algo
+  register: stack

roles/cloud-ec2/tasks/encrypt_image.yml

@@ -1,7 +1,7 @@
 - name: Check if the encrypted image already exist
   ec2_ami_find:
-    aws_access_key: "{{ aws_access_key | default(lookup('env','AWS_ACCESS_KEY_ID'))}}"
-    aws_secret_key: "{{ aws_secret_key | default(lookup('env','AWS_SECRET_ACCESS_KEY'))}}"
+    aws_access_key: "{{ aws_access_key | default(lookup('env','AWS_ACCESS_KEY_ID'), true)}}"
+    aws_secret_key: "{{ aws_secret_key | default(lookup('env','AWS_SECRET_ACCESS_KEY'), true)}}"
     owner: self
     sort: creationDate
     sort_order: descending
@@ -18,8 +18,8 @@
 
 - name: Copy to an encrypted image
   ec2_ami_copy:
-    aws_access_key: "{{ aws_access_key | default(lookup('env','AWS_ACCESS_KEY_ID'))}}"
-    aws_secret_key: "{{ aws_secret_key | default(lookup('env','AWS_SECRET_ACCESS_KEY'))}}"
+    aws_access_key: "{{ aws_access_key | default(lookup('env','AWS_ACCESS_KEY_ID'), true)}}"
+    aws_secret_key: "{{ aws_secret_key | default(lookup('env','AWS_SECRET_ACCESS_KEY'), true)}}"
     encrypted: yes
     name: algo
     kms_key_id: "{{ kms_key_id | default(omit) }}"

roles/cloud-ec2/tasks/main.yml

@@ -1,6 +1,7 @@
 - set_fact:
     access_key: "{{ aws_access_key | default(lookup('env','AWS_ACCESS_KEY_ID'), true) }}"
     secret_key: "{{ aws_secret_key | default(lookup('env','AWS_SECRET_ACCESS_KEY'), true) }}"
+    stack_name: "{{ aws_server_name | replace('.', '-') }}"
 
 - name: Locate official Ubuntu 16.04 AMI for region
   ec2_ami_find:
@@ -20,107 +21,20 @@
 - include: encrypt_image.yml
   tags: [encrypted]
 
-- name: Add ssh public key
-  ec2_key:
-    aws_access_key: "{{ access_key }}"
-    aws_secret_key: "{{ secret_key }}"
-    name: VPNKEY
-    region: "{{ region }}"
-    key_material: "{{ item }}"
-  with_file: "{{ SSH_keys.public }}"
-  register: keypair
-
-- name: Configure EC2 virtual private clouds
-  ec2_vpc:
-    aws_access_key: "{{ access_key }}"
-    aws_secret_key: "{{ secret_key }}"
-    state: present
-    resource_tags: { "Environment":"Algo" }
-    region: "{{ region }}"
-    cidr_block: "{{ ec2_vpc_nets.cidr_block }}"
-    internet_gateway: yes
-    subnets:
-      - cidr: "{{ ec2_vpc_nets.subnet_cidr }}"
-        resource_tags: { "Environment":"Algo" }
-  register: vpc
-
-- name: Set up Public Subnets Route Table
-  ec2_vpc_route_table:
-    aws_access_key: "{{ access_key }}"
-    aws_secret_key: "{{ secret_key }}"
-    vpc_id: "{{ vpc.vpc_id }}"
-    region: "{{ region }}"
-    state: present
-    tags:
-      Environment: Algo
-    subnets:
-      - "{{ ec2_vpc_nets.subnet_cidr }}"
-    routes:
-      - dest: 0.0.0.0/0
-        gateway_id: "{{ vpc.igw_id }}"
-  register: public_rt
-
-- name: Configure EC2 security group
-  ec2_group:
-    aws_access_key: "{{ access_key }}"
-    aws_secret_key: "{{ secret_key }}"
-    name: vpn-secgroup
-    description: Security group for VPN servers
-    region: "{{ region }}"
-    vpc_id: "{{ vpc.vpc_id }}"
-    rules:
-      - proto: udp
-        from_port: 4500
-        to_port: 4500
-        cidr_ip: 0.0.0.0/0
-      - proto: udp
-        from_port: 500
-        to_port: 500
-        cidr_ip: 0.0.0.0/0
-      - proto: tcp
-        from_port: 22
-        to_port: 22
-        cidr_ip: 0.0.0.0/0
-    rules_egress:
-      - proto: all
-        from_port: 0-65535
-        to_port: 0-65535
-        cidr_ip: 0.0.0.0/0
-
-- name: Launch instance
-  ec2:
-    aws_access_key: "{{ access_key }}"
-    aws_secret_key: "{{ secret_key }}"
-    keypair: "VPNKEY"
-    vpc_subnet_id: "{{ vpc.subnets[0].id }}"
-    group: vpn-secgroup
-    instance_type: "{{ cloud_providers.ec2.size }}"
-    image: "{{ ami_image }}"
-    wait: true
-    region: "{{ region }}"
-    instance_tags:
-      Name: "{{ aws_server_name }}"
-      Environment: Algo
-    exact_count: 1
-    count_tag:
-      Name: "{{ aws_server_name }}"
-    assign_public_ip: yes
-    instance_initiated_shutdown_behavior: terminate
-  register: ec2
+- include: cloudformation.yml
 
 - name: Add new instance to host group
   add_host:
-    hostname: "{{ item.public_ip }}"
+    hostname: "{{ stack.stack_outputs.PublicIP }}"
     groupname: vpn-host
     ansible_ssh_user: ubuntu
     ansible_python_interpreter: "/usr/bin/python2.7"
     ansible_ssh_private_key_file: "{{ SSH_keys.private }}"
     cloud_provider: ec2
-    ipv6_support: no
-  with_items: "{{ ec2.tagged_instances }}"
+    ipv6_support: yes
 
 - set_fact:
-    cloud_instance_ip: "{{ ec2.tagged_instances[0].public_ip }}"
+    cloud_instance_ip: "{{ stack.stack_outputs.PublicIP }}"
 
 - name: Get EC2 instances
   ec2_remote_facts:

roles/cloud-ec2/templates/stack.yml.j2

@@ -0,0 +1,192 @@
+---
+
+AWSTemplateFormatVersion: '2010-09-09'
+Description: 'Algo VPN stack'
+Resources:
+
+  VPC:
+    Type: AWS::EC2::VPC
+    Properties:
+      CidrBlock: {{ ec2_vpc_nets.cidr_block }}
+      EnableDnsSupport: true
+      EnableDnsHostnames: true
+      InstanceTenancy: default
+      Tags:
+        - Key: Name
+          Value: Algo
+        - Key: Environment
+          Value: Algo
+
+  VPCIPv6:
+    Type: AWS::EC2::VPCCidrBlock
+    Properties:
+      AmazonProvidedIpv6CidrBlock: true
+      VpcId: !Ref VPC
+
+  InternetGateway:
+    Type: AWS::EC2::InternetGateway
+    Properties:
+      Tags:
+        - Key: Environment
+          Value: Algo
+        - Key: Name
+          Value: Algo
+
+  Subnet:
+    Type: AWS::EC2::Subnet
+    Properties:
+      CidrBlock: {{ ec2_vpc_nets.subnet_cidr }}
+      MapPublicIpOnLaunch: true
+      Tags:
+        - Key: Environment
+          Value: Algo
+        - Key: Name
+          Value: Algo
+      VpcId: !Ref VPC
+
+  VPCGatewayAttachment:
+    Type: AWS::EC2::VPCGatewayAttachment
+    Properties:
+      VpcId: !Ref VPC
+      InternetGatewayId: !Ref InternetGateway
+
+  RouteTable:
+    Type: AWS::EC2::RouteTable
+    Properties:
+      VpcId: !Ref VPC
+      Tags:
+        - Key: Environment
+          Value: Algo
+        - Key: Name
+          Value: Algo
+
+  Route:
+    Type: AWS::EC2::Route
+    DependsOn:
+      - InternetGateway
+      - RouteTable
+      - VPCGatewayAttachment
+    Properties:
+      RouteTableId: !Ref RouteTable
+      DestinationCidrBlock: 0.0.0.0/0
+      GatewayId: !Ref InternetGateway
+
+  RouteIPv6:
+    Type: AWS::EC2::Route
+    DependsOn:
+      - InternetGateway
+      - RouteTable
+      - VPCGatewayAttachment
+    Properties:
+      RouteTableId: !Ref RouteTable
+      DestinationIpv6CidrBlock: "::/0"
+      GatewayId: !Ref InternetGateway
+
+  SubnetIPv6:
+    Type: AWS::EC2::SubnetCidrBlock
+    DependsOn:
+      - RouteIPv6
+      - VPC
+      - VPCIPv6
+    Properties:
+      Ipv6CidrBlock:
+        "Fn::Join":
+            - ""
+            - - !Select [0, !Split [ "::", !Select [0, !GetAtt VPC.Ipv6CidrBlocks] ]]
+              - "::dead:beef/64"
+      SubnetId: !Ref Subnet
+
+  RouteSubnet:
+    Type: "AWS::EC2::SubnetRouteTableAssociation"
+    DependsOn:
+      - RouteTable
+      - Subnet
+      - Route
+    Properties:
+      RouteTableId: !Ref RouteTable
+      SubnetId: !Ref Subnet
+
+  InstanceSecurityGroup:
+    Type: AWS::EC2::SecurityGroup
+    DependsOn:
+      - Subnet
+    Properties:
+      VpcId: !Ref VPC
+      GroupDescription: Enable SSH and IPsec
+      SecurityGroupIngress:
+        - IpProtocol: tcp
+          FromPort: '22'
+          ToPort: '22'
+          CidrIp: 0.0.0.0/0
+        - IpProtocol: udp
+          FromPort: '500'
+          ToPort: '500'
+          CidrIp: 0.0.0.0/0
+        - IpProtocol: udp
+          FromPort: '4500'
+          ToPort: '4500'
+          CidrIp: 0.0.0.0/0
+      Tags:
+        - Key: Name
+          Value: Algo
+        - Key: Environment
+          Value: Algo
+
+  EC2Instance:
+    Type: AWS::EC2::Instance
+    DependsOn:
+      - SubnetIPv6
+      - Subnet
+      - InstanceSecurityGroup
+    Metadata:
+      AWS::CloudFormation::Init:
+        config:
+          users:
+            ubuntu:
+              groups:
+                - "sudo"
+              homeDir: "/home/ubuntu/"
+          files:
+            /home/ubuntu/.ssh/authorized_keys:
+              content: {{ lookup('file', SSH_keys.public) }}
+              mode: "000644"
+              owner: "ubuntu"
+              group: "ubuntu"
+    Properties:
+      InstanceType: {{ cloud_providers.ec2.size }}
+      InstanceInitiatedShutdownBehavior: terminate
+      SecurityGroupIds:
+        - Ref: InstanceSecurityGroup
+      ImageId: {{ ami_image }}
+      SubnetId: !Ref Subnet
+      Ipv6AddressCount: 1
+      UserData:
+        "Fn::Base64":
+          !Sub |
+            #!/bin/bash -xe
+            # http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-migrate-ipv6.html
+            # https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1013597
+            cat <<EOF > /etc/network/interfaces.d/60-default-with-ipv6.cfg
+            iface eth0 inet6 dhcp
+                up sysctl net.ipv6.conf.\$IFACE.accept_ra=2
+                pre-down ip link set dev \$IFACE up
+            EOF
+            ifdown eth0; ifup eth0
+            dhclient -6
+            apt-get update
+            apt-get -y install python-setuptools
+            easy_install https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz
+            cfn-init -v --stack {{ stack_name }} --resource EC2Instance --region {{ region }}
+            cfn-signal -e $? --stack {{ stack_name }} --resource EC2Instance --region {{ region }}
+      Tags:
+        - Key: Name
+          Value: Algo
+        - Key: Environment
+          Value: Algo
+
+Outputs:
+  PublicIP:
+    Value:
+      Fn::GetAtt:
+      - EC2Instance
+      - PublicIp

roles/vpn/templates/rules.v6.j2

@@ -31,6 +31,8 @@ COMMIT
 -A INPUT -p icmpv6 --icmpv6-type neighbor-solicitation -m hl --hl-eq 255 -j ACCEPT
 -A INPUT -p icmpv6 --icmpv6-type neighbor-advertisement -m hl --hl-eq 255 -j ACCEPT
 -A INPUT -p icmpv6 --icmpv6-type redirect -m hl --hl-eq 255 -j ACCEPT
+# DHCP in AWS
+-A INPUT -m state --state NEW -m udp -p udp --dport 546 -d fe80::/64 -j ACCEPT
 # TODO:
 # The IP of the resolver should be bound to a DUMMY interface.
 # DUMMY interfaces are the proper way to install IPs without assigning them any