Gateway-MT and Link Sharing Service should determine if they can access satellites before they start

[amwolff]

Goal

On some hosts, Gateway-MT and Link Sharing Service cannot access satellites. Without the ability to access satellites, all traffic ends up in a black hole (probably not the most precise description), timing out.

We should make a startup check that determines whether a particular server can be used.

Acceptance Criteria

• Gateway-MT and Link Sharing Service check whether they can access satellites before they start
  • If the check fails, they should abort startup and exit to the system immediately

Links

In my opinion, we should create a shared package like startupchecks. It can contain checks themselves and instrumentation to run them. Gateway-MT and Link Sharing Service would call that before starting any HTTP servers.

[storj-gerrit]

Change https://review.dev.storj.io/c/storj/gateway-mt/+/10185 mentions this issue.

[storj-gerrit]

Change https://review.dev.storj.io/c/storj/gateway-mt/+/10201 mentions this issue.

[storj-gerrit]

Change https://review.dev.storj.io/c/storj/gateway-mt/+/10202 mentions this issue.

[storj-gerrit]

Change https://review.dev.storj.io/c/storj/gateway-mt/+/10227 mentions this issue.