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| 1 | +Migrating to Deis 0.8.0 |
| 2 | +======================= |
| 3 | + |
| 4 | +If you are updating from Deis version 0.7.0 or earlier, there are |
| 5 | +several big changes you should know about. |
| 6 | + |
| 7 | +If you need to use Deis with Chef integration, on Ubuntu 12.04 LTS, or |
| 8 | +on DigitalOcean, you should use the |
| 9 | +[v0.7.0 release](https://github.com/opdemand/deis/tree/v0.7.0) of Deis. |
| 10 | + |
| 11 | +Upgrading |
| 12 | +--------- |
| 13 | +During the last several months of pre-release development of Deis, we |
| 14 | +have not been able to provide a smooth upgrade process between every |
| 15 | +release. Unfortunately, that is also the case for the upcoming release, |
| 16 | +v0.8.0. The reasons why a simple in-place upgrade isn't possible for |
| 17 | +this release are made plain below. |
| 18 | + |
| 19 | +However, the Deis core developers believe the current release is stable |
| 20 | +architecturally--we don't anticipate major changes to components, |
| 21 | +interfaces, or packaging at this point. And we will soon implement a |
| 22 | +reliable upgrade process that will enable you to stay with Deis changes |
| 23 | +from here on out by simple in-place upgrades. |
| 24 | + |
| 25 | +So thanks for your patience. We could not have gotten here without you, |
| 26 | +the Deis community. Now we're here to support you, so install Deis 0.8.0 |
| 27 | +and come on along with us. |
| 28 | + |
| 29 | +Chef not Required |
| 30 | +----------------- |
| 31 | +Versions of Deis previous to v0.8.0 relied on Chef for provisioning |
| 32 | +a controller and nodes, for tracking users and apps, and for deploying |
| 33 | +applications. Chef is now no longer a requirement to use Deis. |
| 34 | + |
| 35 | +Now anywhere you can run CoreOS, you can run Deis. Provisioning a |
| 36 | +contoller and nodes can be done through a variety of IT-friendly methods |
| 37 | +available for everything from Rackspace Cloud to Vagrant to PXE hardware |
| 38 | +boot--see the CoreOS documentation for details. |
| 39 | + |
| 40 | +Users and apps are tracked in Deis' controller and database, and apps |
| 41 | +are deployed across a cluster of machines by the `fleet` distributed |
| 42 | +init system. |
| 43 | + |
| 44 | +CoreOS replaces Ubuntu |
| 45 | +---------------------- |
| 46 | +Versions of Deis previous to v0.8.0 supported installation on Ubuntu |
| 47 | +12.04 LTS. Deis now runs on CoreOS, a lean distribution targeted at |
| 48 | +massive server deployments. |
| 49 | + |
| 50 | +No More Formations or Layers |
| 51 | +---------------------------- |
| 52 | +Versions of Deis previous to v0.8.0 organized groups of machines into |
| 53 | +"formations" with internal "layers" used to scale nodes. Deis now |
| 54 | +simplifies both concepts into that of a "cluster": a set of machines |
| 55 | +available for smart process scheduling. |
| 56 | + |
| 57 | +No More Providers |
| 58 | +----------------- |
| 59 | +Deis now incorporates new machines into a cluster through whatever IT |
| 60 | +process is appropriate; there is no more `deis nodes:scale`. Individual |
| 61 | +support modules for cloud providers such as Rackspace and Amazon EC2 |
| 62 | +are no longer part of Deis' core code, and there is no need to import |
| 63 | +credentials through the Deis CLI. |
| 64 | + |
| 65 | +Amazon EC2, Rackspace and other cloud providers, as well as bare metal |
| 66 | +deployments, continue to be the focus of support and development for |
| 67 | +Deis. But Deis no longer needs vendor-specific code in order to grow |
| 68 | +a cluster or scale an application. |
| 69 | + |
| 70 | +Support scripts and documentation for Amazon EC2, Rackspace, and other |
| 71 | +cloud providers are always available in the |
| 72 | +[contrib](contrib/) directory. |
| 73 | + |
| 74 | +DigitalOcean Support |
| 75 | +-------------------- |
| 76 | +DigitalOcean does not yet support deploying CoreOS on droplets. Until |
| 77 | +there is a CoreOS solution, Deis cannot support clusters |
| 78 | +on DigitalOcean. |
| 79 | + |
| 80 | +If you use DigitalOcean, please |
| 81 | +[show your support](http://digitalocean.uservoice.com/forums/136585-digital-ocean/suggestions/4250154-suport-coreos-as-a-deployment-platform) |
| 82 | +for CoreOS and help us to support Deis on DO. |
| 83 | + |
| 84 | +deis/deis in GitHub |
| 85 | +------------------- |
| 86 | +The https://github.com/opdemand/deis will soon move under the banner of |
| 87 | +*The Deis Project* at https://github.com/deis, so getting the source |
| 88 | +code will be: |
| 89 | + |
| 90 | +```console |
| 91 | +$ git clone https://github.com/deis/deis.git |
| 92 | +``` |
| 93 | + |
| 94 | +Nothing else about the project changes; we just think it will be easier |
| 95 | +to find Deis there, next to related projects such as deis/tester, |
| 96 | +deis/base, and deis/slugbuilder. |
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