Documented release process for maintainers in hack/RELEASE.md

hack/RELEASE.md

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+## A maintainer's guide to releasing Docker
+
+So you're in charge of a docker release? Cool. Here's what to do.
+
+If your experience deviates from this document, please document the changes to keep it
+up-to-date.
+
+
+### 1. Pull from master and create a release branch
+
+	```bash
+	$ git checkout master
+	$ git pull
+	$ git checkout -b bump_$VERSION
+	```
+
+### 2. Update CHANGELOG.md
+
+	You can run this command for reference:
+
+	```bash
+	LAST_VERSION=$(git tag | grep -E "v[0-9\.]+$" | sort -nr | head -n 1)
+	git log $LAST_VERSION..HEAD
+	```
+
+	Each change should be formatted as ```BULLET CATEGORY: DESCRIPTION```
+
+	* BULLET is either ```-```, ```+``` or ```*```, to indicate a bugfix,
+	new feature or upgrade, respectively.
+
+	* CATEGORY should describe which part of the project is affected.
+	Valid categories are:
+		* Runtime
+		* Remote API
+		* Builder
+		* Documentation
+		* Hack
+
+	* DESCRIPTION: a concise description of the change that is relevant to the end-user,
+	using the present tense.
+	Changes should be described in terms of how they affect the user, for example "new feature
+	X which allows Y", "fixed bug which caused X", "increased performance of Y".
+
+	EXAMPLES:
+
+		```
+		 + Builder: 'docker build -t FOO' applies the tag FOO to the newly built container.
+		 * Runtime: improve detection of kernel version
+		 - Remote API: fix a bug in the optional unix socket transport
+		 ```
+
+### 3. Change VERSION in commands.go
+
+### 4. Run all tests
+
+### 5. Commit and create a pull request
+
+	```bash
+	$ git add commands.go CHANGELOG.md
+	$ git commit -m "Bump version to $VERSION"
+	$ git push origin bump_$VERSION
+	```
+
+### 6. Get 2 other maintainers to validate the pull request
+
+### 7. Merge the pull request and apply tags
+
+	```bash
+	$ git checkout master
+	$ git merge bump_$VERSION
+	$ git tag -a v$VERSION # Don't forget the v!
+	$ git tag -f -a latest
+	$ git push
+	$ git push --tags
+	```
+
+### 8. Publish binaries
+
+	To run this you will need access to the release credentials.
+	Get them from [the infrastructure maintainers](https://github.com/dotcloud/docker/blob/master/hack/infrastructure/MAINTAINERS).
+
+	```bash
+	$ RELEASE_IMAGE=image_provided_by_infrastructure_maintainers
+	$ BUILD=$(docker run -d -e RELEASE_PPA=0 $RELEASE_IMAGE)
+	```
+
+	This will do 2 things:
+	
+	* It will build and upload the binaries on http://get.docker.io
+	* It will *test* the release on our Ubuntu PPA (a PPA is a community repository for ubuntu packages)
+
+	Wait for the build to complete.
+
+	```bash
+	$ docker wait $BUILD # This should print 0. If it doesn't, your build failed.
+	```
+
+	Check that the output looks OK. Here's an example of a correct output:
+
+	```bash
+	$ docker logs 2>&1 b4e7c8299d73 | grep -e 'Public URL' -e 'Successfully uploaded'
+	Public URL of the object is: http://get.docker.io.s3.amazonaws.com/builds/Linux/x86_64/docker-v0.4.7.tgz
+	Public URL of the object is: http://get.docker.io.s3.amazonaws.com/builds/Linux/x86_64/docker-latest.tgz
+	Successfully uploaded packages.
+	```
+
+	If you don't see 3 lines similar to this, something might be wrong. Check the full logs and try again.
+	
+
+### 9. Publish Ubuntu packages
+
+	If everything went well in the previous step, you can finalize the release by submitting the Ubuntu packages.
+
+	```bash
+	$ RELEASE_IMAGE=image_provided_by_infrastructure_maintainers
+	$ docker run -e RELEASE_PPA=1 $RELEASE_IMAGE
+	```
+
+	If that goes well, congratulations! You're done.