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On-Prem Support That was so 1982 charlie@cloud-elements.com @CharlieOzinga

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On-Prem Support That was so ...

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On-Prem Support That was so 1982

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A long time ago... In an IT department far away, a company would own and maintain all of its own computer hardware, where it would install all the software it used. This was generally considered a terrible idea. Then came the Cloud, which promised to save time and effort just by adding “as a service” to everything...

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Moving to the Cloud (Like, the Cloud is totally way cool, dude)

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Everybody’s doing it ... ‘ The argument over whether to go cloud or not is over. Aside from a few businesses ... most companies now acknowledge that they will eventually be moving their applications to the cloud. ‘ ‘ If I could have simply deployed our software on the public cloud, ... I would have asked, “Where do I sign?” ‘ ‘ [moving to the cloud] is undoubtedly one of the biggest trends in the IT industry right now. ‘

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… or are they? ‘ Compute- and I/O-intensive big data workloads won't stray to the cloud yet as security and existing infrastructure keep analytics in the data center. ‘ ‘ Moving to the cloud should always be well evaluated and only done if it brings value ... not everything needs to be moved from On-Premises to the cloud. ‘

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Scorecard: Cloud ●  Outsource IT ●  Cost ●  Upgrades ●  Mobility ●  Access*

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Scorecard: On-Prem ●  Security (transmit, storage) ●  Compliance (HIPAA, PCI, internal) ●  Integration (w/ other software or processes) ●  Inertia (tech debt, things that work) ●  Cost (to scale)

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Conclusion: Cloud is still trending, but there will still be holdouts for the foreseeable future.

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Connecting … (14.4k baud modem sound goes here)

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Connecting: Cloud User connects directly to API via the magic of the Internet.

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Connecting: On-Prem (0) Nothing to connect to / is not reachable ●  Intranet ●  Firewall ●  Desktop

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Connecting: On-Prem (1) On-Prem installs Ground2Cloud Client, which creates a tunnel to our hosted Ground2Cloud Server.

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Connecting: On-Prem (2) User connects to server, which is forwarded to API via tunnel.

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Conclusion: It’s theoretically possible to connect to on-prem APIs in the same way you connect to Cloud APIs.

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Challenges … (Like, what’s your damage?)

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Usability ●  Multiple services on the same on- prem installation. ●  Automatable. ●  Easy to install and run. ●  Have to monitor and detail client connections. ●  Easy to upgrade.

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Usability ●  Multiple services on the same on- prem installation. ●  Automatable. ●  Easy to install and run. ●  Have to monitor and detail client connections. ●  Easy to upgrade. ●  Multi-tenant client ●  Client API ○  Manage tenants ○  Stop / Start / Register ●  Multi-tenant (per Org) server ●  Server API ○  Total registered users ○  API success / error count

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Client + Server API $ curl localhost:8101/counts/requests ← server API {"count":432} $ curl localhost:8100/tenants ← client API { "success": true, "tenants": [ { "registered": true, "registeredId": "4001", ... } ] }

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Security ●  Data must be secure at all stages of transit. ●  Each user must be isolated. ●  Registration / handshake process must be resistant to attacks.

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Security ●  Data must be secure at all stages of transit. ●  Each user must be isolated. ●  Registration / handshake process must be resistant to attacks. ●  Use SSH w/ TLS to establish communication and API connection. ●  Keys for identity and SSH are generated on the client, and only public part shared with server. ●  HTTP(S) proxy with its own cert, backend verifies service cert.

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Scalability / Stability ●  ~10k of open sockets. ●  ~1k requests / sec ●  Listen ports not immediately being reaped. ●  Network instability ●  Silently dropped connections.

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Scalability / Stability ●  ~10k of open sockets. ●  ~1k requests / sec ●  Listen ports not immediately being reaped. ●  Network instability ●  Silently dropped connections. ●  Automatic retries. ●  Self-healing connection and process restart. ●  Runs as a service. ●  Periodic heartbeat / loopback call. ●  Port number shifting. ●  HA / Distributed server stack.

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Conclusion: With a little work, it’s feasible to treat on-prem services like cloud services.

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Future work (When the Going Gets Tough, the Tough Get Going)

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Down the Road ●  Events and notification ○  Service / tunnel up/down ○  Request failure notification ●  Queueing (some) requests in the server ●  Improved HA and scalability of server

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Conclusion: This section was only a single slide, so it doesn’t really need its own conclusion.

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Q + A charlie@cloud-elements.com https://developers.cloud-elements.com/ -> “API Toolkit” -> “Ground2Cloud” http://cloud-elements.com

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(no, seriously, we’re done here)