[metrics-bugs] #28322 [Metrics]: Deploy better notification system for operational issues

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#28322: Deploy better notification system for operational issues
-------------------------------------+--------------------------
 Reporter:  karsten                  |          Owner:  irl
     Type:  project                  |         Status:  accepted
 Priority:  High                     |      Milestone:
Component:  Metrics                  |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:  metrics-roadmap-2019-q2  |  Actual Points:
Parent ID:                           |         Points:  10
 Reviewer:                           |        Sponsor:
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Comment (by irl):

 I took a go at deploying this on AWS. I had heard about this new fancy
 Lightsail and deployed it there. This was a mistake and ended up being a
 waste of time for a number of reasons.

 Instead this is going to need to use EC2 (which Lightsail is based on
 anyway) so that we have better control over the firewall (ICMP is blocked
 on Lightsail) and so that it is possible to use the metadata service for
 AWS credentials (which will allow us to use SNS for alerting).

 In good news though, the Ansible playbook works well for deploying the
 software and configuration.

 As this is going to involve an EC2 instance, a couple of SNS topics, an
 IAM role and some glue I would like to see if I can get a CloudFormation
 template for this together so that we don't have AWS resources scattered
 and forgotten (and billed for) when we change this in the future.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28322#comment:4>
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