oracle: remove custom gzipped kernel

Since Xen HVM is supported on Oracle Cloud, the default kernels
compressed with XZ can be booted with no problem.

bootstrapvz/providers/oracle/README.md

@@ -3,10 +3,6 @@ Oracle
 
 The Oracle provider creates RAW images compressed in a `.tar.gz` tarball. Those image have to be uploaded using the web interface of the Oracle Compute Cloud Service dashboard.
 
-## Dependencies
-
-Oracle Compute Cloud currently supports only kernel images compressed with GZIP. Debian kernels from 3.6 and up are compressed with XZ and will not work. If you plan to bootstrap a `jessie` image, for instance, you will have to download or build a custom kernel. The manifest examples expects a custom kernel package located at `/tmp/linux-image-3.16.7-ckt11-gzip-1_amd64.deb`.
-
 ## Quick Start
 
 Install `apt`/`pip` dependencies:
@@ -14,11 +10,6 @@ Install `apt`/`pip` dependencies:
     $ sudo apt-get install debootstrap git parted kpartx qemu-utils python-pip
     $ sudo pip install termcolor jsonschema fysom docopt pyyaml
 
-Download a custom-built gzipped kernel:
-
-    $ cd /tmp/
-    $ wget http://viridian.ilieve.org/kernel/linux-image-3.16.7-ckt11-gzip-1_amd64.deb
-
 Clone this repository:
 
     $ cd ~/

bootstrapvz/providers/oracle/__init__.py

@@ -5,6 +5,7 @@ from bootstrapvz.common.tasks import ssh
 from bootstrapvz.common.tasks import volume
 import tasks.image
 import tasks.network
+import tasks.packages
 
 
 def validate_manifest(data, validator, error):
@@ -24,6 +25,7 @@ def resolve_tasks(taskset, manifest):
 	                volume.Delete,
 	                tasks.image.CreateImageTarball,
 	                tasks.network.InstallDHCPCD,
+	                tasks.packages.DefaultPackages,
 	                ])
 
 

bootstrapvz/providers/oracle/tasks/packages-kernels.yml

@@ -0,0 +1,11 @@
+---
+# This is a mapping of Debian release codenames to processor architectures to kernel packages
+jessie:
+  amd64: linux-image-amd64
+  i386: linux-image-686-pae
+stretch:
+  amd64: linux-image-amd64
+  i386: linux-image-686-pae
+sid:
+  amd64: linux-image-amd64
+  i386: linux-image-686-pae

bootstrapvz/providers/oracle/tasks/packages.py

@@ -0,0 +1,16 @@
+from bootstrapvz.base import Task
+from bootstrapvz.common import phases
+from bootstrapvz.common.tools import config_get
+import os.path
+
+
+class DefaultPackages(Task):
+	description = 'Adding image packages required for Oracle Cloud'
+	phase = phases.preparation
+
+	@classmethod
+	def run(cls, info):
+		kernel_packages_path = os.path.join(os.path.dirname(__file__), 'packages-kernels.yml')
+		kernel_package = config_get(kernel_packages_path, [info.manifest.release.codename,
+		                                                   info.manifest.system['architecture']])
+		info.packages.add(kernel_package)

manifests/examples/oracle/jessie.yml

@@ -18,10 +18,6 @@ volume:
     root:
       filesystem: ext4
       size: 8GiB
-packages:
-  install:
-      - initramfs-tools
-      - /tmp/linux-image-3.16.7-ckt11-gzip-1_amd64.deb
 plugins:
   cloud_init:
     username: opc