This reference design helps you build a repeatable deployment solution that scales indefinitely, as shown in the diagram below:
where the Aviatrix controller instance can be in the same or a different VPC. Each customer or managed VPC shares an identical VPC CIDR, security policies and instances. A user who connects to the management VPC should be uniquely address an instance in any given VPC by a private IP address or with a preferred name.
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The configuration workflow is as follows. It highlights the major steps.
Create a gateway in management VPC
The mgmt-vpc is our management VPC with CIDR 172.31.0.0/16 in us-west-2. Click Gateway, then Create, make sure:
- The VPC ID field is the AWS VPC ID where you launch the management gateway.
- The Gateway Name in this example is mgmt-gw.
- Enable NAT is not selected.
- VPN Access is not selected.
Create an Access Address Pool
This Access Address Pool is the address range from which instance addresses are mapped to. Accessing instance is done by accessing one mapped address from the pool. Go to VPC/VNet -> Environment Stamping -> Map Instance Addresses -> Address Pool. Make sure:
- The Access Address Pool is big enough. In this example, we use 192.168.0.0/16 which gives you 16K unique IP addresses.
- Select mgmt-vpc as the gateway choice.
- Click Set.
(Optional) Setup Instance Names
envStamping integrates Route 53 private hosted zone feature to enables you to access instances with DNS names and preferred (alias) names. Skip this step if you do not wish to use names to access instances.
Go to VPC/VNet -> Environment Stamping -> Setup Instance Names -> Config. Enter a private domain name. For example, mydevops.com. Click Enable.
Create VPN gateways
Create one or more VPN gateways in the management VPC for users to connect to AWS and access instances. In this example, we configure a split tunnel mode solution where only cloud bound traffic goes to the VPN tunnel. Among all fields you need to enter, make sure:a. Enable NAT is selected.b. VPN Access is selected.i. VPN CIDR Block must be an address range that is outside ofmanagement VPC and all other VPCs you intend to create. Inthis example, enter 10.20.0.0/24.ii. Split Tunnel Mode is “Yes”.1. Additional CIDRs: enter the Access Address Pool CIDR. Inthis example, enter 192.168.0.0/162. (optional) Nameservers: enter the private DNS server of themanagement VPC if Setup Instance Names is enabled. In thisexample, enter 172.31.0.23. (optional) Search Domains: The private hosted zone domainname if Setup Instance Names is enabled. In this example,enter mydevops.comc. Enable AWS ELB is “Yes”.d. Save Template: check to save the template.e. Repeat the above steps to create more VPN gateways to achievescalability and resilience.
Create a managed VPC pool and its gateways
This step creates a number of managed VPCs and gateways. If you already have existing VPCs, you should use Gateway tab to just create gateways. Make sure VPN access is disabled.
- Go to VPC/VNet -> Environment Stamping -> Manage VPC Pool -> Create
- Pool Name: a name for this VPC pool. Every VPC created in this pool will have a numeric number append to it. In this example, enter customer.
- Number of VPCs: the number of VPCs. In this example, enter 3.
- Check Launch Gateway
- Enable NAT: check this box if you like the gateway to also perform NAT function.
Launch customer instances
Once VPC and gateways are created, you can launch instances from AWS console or your own CloudFormation scripts. The pool of managed VPC may already have some instances.
Map instance addresses
This step scans and maps instance private addresses in managed VPC to addresses from Access Address Pool, so that you can access these instances via Access Address Pool addresses.
- Go to VPC/VNet -> Environment Stamping -> Map Instance Addresses -> Auto Mapping
- Management VPC: select the gateway for management VPC. In this example, select mgmt-gw
- Managed VPC: select one gateway from managed VPC. In this example, select customer001. Click Scan & Map.
- Repeat the above step for all the remaining gateways in managed VPC.
- Go to VPC/VNet -> Environment Stamping -> Map Instance Addresses -> List to view your instances and their mapped addresses.
Add VPN users to the cloud network. Go to VPC/VNet -> VPN Access -> Users. Use Profile to control which user can access what cloud instance/application/ports.
Access Instances with Names
When a user connects to management VPC, she can access instances in all managed VPCs.
The instances can be accessed by its mapped Access Address, DNS name or nickname. When using DNS names and nicknames, make sure you include the domain name. For example, an instance with nickname webfrontend should be accessed as webfrontend.mydevops.com
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