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Realigning our role composition back with cf upstream #1633

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Realigning our role composition back with cf upstream #1633

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Commits on Jul 20, 2018

  1. Remove "processes" list from all roles 

    They are not being used for anything anymore.

[trello#llqBKY7z]
    @jandubois
    jandubois committed Jul 20, 2018
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  2. Remove duplicate routing_api.locket.api_location property

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  3. Colocate mysql and mysql-proxy in database role 

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  4. Merge diego-locket role into diego-api 

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    @jandubois
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  5. Combine loggregator and syslog-rlp into log-api role 

    The old loggregator role was already claiming port 8082 for "grpc", so would
potentially conflict with syslog-rlp. However, I think 8082 is the doppler
grpc port, which doesn't run on the loggregator role, so this looks like a
mistake.

[trello#llqBKY7z]
    @jandubois
    jandubois committed Jul 20, 2018
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  6. Merge routing-api role into api 

    Also move cc_uploader role (from cc-uploader) and file_server role
(from diego_access) into api role as well.

Open issues/questions:

* api needs to talk to routing-api. Since we don't require hairpin support
  (Azure doesn't support it yet), we cannot use the service name, but need
  to access it via 127.0.0.1. This means that the routing-api cert also
  needs to list the loopback address as an alternate name.

* routing-api was an active-passive role, so api is also active-passive
  now, which will affect scalability.

[trello#llqBKY7z]
    @jandubois
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  7. Create new scheduler role 

    Includes (what is still left of) cc-clock, cc-uploader (tps), diego-access,
diego-brain, and syslog-scheduler.

Open issues/questions:

* syslog-scheduler was a headless role; that tag is now lost.

* cc-clock and syslog-scheduler were singletons; they can now have
  up to 3 instances (and will have 2 by default under HA).

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    @jandubois
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  8. Rename syslog-adapter to adapter and blobstore to singleton-blobstore 

    Open issue/question:

* Upstream rename just the blobstore role, but not the URL, so that the
singleton role can be replaced with a scalable HA version via ops files,
without having to also update any of the other roles as well.

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