Update ECS agent version

We should update our Cluster class to use the latest ECS agent AMI.

http://docs.aws.amazon.com/AmazonECS/latest/developerguide/container_agent_versions.html

We should also decide on our policy here - we have two choices:

1. Have the framework automatically pick the latest
2. Plan to manually update the agent version sometime after AWS releases and after we’ve been able to do our own validation

Separately, we could decide whether we want to allow overriding the agent version via config so that taking a new framework version doesn’t force rebuilding the cluster VMs.

[lukehoban]

potato/tomato

I think it will be critical that we are precise in how we reason about versioning for this library and the distinction that it is itself not a SaaS/PaaS but is a component which is adopted in a versioned way in SaaS apps is really consequential (and in fact, creates many more constraints on our solution than if this was only actually deployed as a SaaS and consumed through a single “head” version all the time).

[ericrudder]

i’m sort of with you on the library distinction … a little less so on policy, esp. depending on how we dogfood. you can have the last word, however, i think the slope is a little more slippery. i know we think we’ve drawn the line at fabric, not framework, however, i think over time, we’ll have P apps critical to running P.

On Tue, Nov 7, 2017 at 3:12 PM, Luke Hoban [e-mail] wrote:

potato/tomato

I think it will be critical that we are precise in how we reason about versioning for this library and the distinction that it is itself not a SaaS/PaaS but is a component which is adopted in a versioned way in SaaS apps is really consequential (and in fact, creates many more constraints on our solution than if this was only actually deployed as a SaaS and consumed through a single “head” version all the time).

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