Add initial release documentation

Author: aaronlevy

RELEASING.md

@@ -0,0 +1,82 @@
+# Preparing a bootkube release
+
+### Update kubernetes vendor code
+
+- Bump `VENDOR_VERSION` in `Makefile`
+- Run `make vendor`
+
+### Update hyperkube image
+
+- Update hyperkube image version in templates: `pkg/asset/internal/templates.go`
+- Update on-host kubelet versions (`KUBELET_VERSION`)
+    - hack/multi-node/user-data.sample
+    - hack/single-node/user-data.sample
+
+### Update conformance test k8s version
+
+- hack/tests/conformance-test.sh (`CONFORMANCE_VERSION`)
+
+### Run conformance test
+
+Easiest is to use internal jenkins jobs
+
+Or, manually:
+
+```
+# GCE
+./hack/tests/conformance-gce.sh
+```
+
+```
+# Vagrant
+make conformance-multi
+```
+
+```
+# Other
+./hack/tests/conformance-test.sh
+```
+
+### Cut a release image
+
+Easiest is to use internal jenkins jobs
+
+Or, manually:
+
+```
+PUSH_IMAGE=true ./build/build-image.sh
+```
+
+# Updating quickstart guides
+
+Note: the quickstart guides use the release images, so we should not update them until after building/pushing new release.
+
+Update on-host kubelet version (`KUBELET_VERSION`)
+
+- hack/quickstart/kubelet.master
+- hack/quickstart/kubelet.worker
+
+Update the bootkube image version (to latest release)
+
+- hack/quickstart/init-master.sh (`BOOTKUBE_VERSION`)
+
+# Updating checkpointer
+
+This only needs to happen when changes have been made to the checkpointer code / container.
+
+### Build a new checkpointer image
+
+Easiest is to use internal jenkin jobs
+
+Or, manually:
+
+```
+BUILD_IMAGE=checkpoint PUSH_IMAGE=true ./build/build-image.sh
+```
+
+### Update checkpointer manifest
+
+In `pkg/asset/internal/templates.go` change:
+
+`CheckpointerTemplate` manifest to use the image built in previous step.
+