Explore running some instances on Graviton instance types

[mcdonnnj]

🚀 Feature Proposal

We should look at building ARM64 AMIs for some instance types (bastion, docker, portscan, and vulnscan come to mind) to run on Graviton instance types.

Note

We would need to ensure that all dependencies on these instances support ARM64.

Motivation

Leveraging Graviton instance types might gain us both price and performance wins. On the price point for example (in us-east-1):

CyHy Instance	Current Instance Type	Current On-Demand Price	Graviton Instance Type	Graviton On-Demand Price	Notes
bastion	t3.small	$0.0208	t4g.small	$0.0168
dockeer	r5.xlarge	$0.252	r7g.xlarge	$0.2142
portscan	t3.medium	$0.0416	t4g.medium	$0.0336
vulnscan	c5.9xlarge	$1.53	c7g.8xlarge	$1.16	The Graviton instance has 32 vs. 36 vCPUs and 64GiB vs. 72GiB of memory.

Pitch

Using Graviton instances where viable could net us cost-savings, performance gains, and since they are lower power it could be better for the planet.