Refactor EC2 image generation script. Now uses same procedure for both hvm and pv-grub

images. Root disks are now SSD backed and 20GB by default, both on hvm and pv-grub
(previously was 8GB for HVM). Added new eu-central region to the locations to copy images
to. Also the root disk for HVM instances was not deleted on termination with previous
images, this is fixed as well.

nixos/maintainers/scripts/ec2/amazon-hvm-install-config.nix

@@ -19,7 +19,8 @@ in
 {
   imports = [ ./amazon-base-config.nix ];
   ec2.hvm = true;
-  boot.loader.grub.device = lib.mkOverride 0 "nodev";
+  boot.loader.grub.device = lib.mkOverride 0 "/dev/xvdg";
+  boot.kernelParams = [ "console=ttyS0" ];
 
   boot.initrd.extraUtilsCommands = ''
     cp -v ${pkgs.gawk}/bin/gawk $out/bin/gawk

nixos/maintainers/scripts/ec2/create-ebs-amis.py

@@ -19,8 +19,17 @@ parser.add_argument('--key', dest='key_name', action='store_true', help='Keypair
 args = parser.parse_args()
 
 instance_type = "m3.medium" if args.hvm else "m1.small"
-ebs_size = 8 if args.hvm else 20
 
+if args.hvm:
+    virtualization_type = "hvm"
+    root_block = "/dev/sda1"
+    image_type = 'hvm'
+else:
+    virtualization_type = "paravirtual"
+    root_block = "/dev/sda"
+    image_type = 'ebs'
+
+ebs_size = 20
 
 # Start a NixOS machine in the given region.
 f = open("ebs-creator-config.nix", "w")
@@ -76,10 +85,6 @@ if args.hvm:
     m.upload_file("./amazon-hvm-config.nix", "/mnt/etc/nixos/configuration.nix")
     m.upload_file("./amazon-hvm-install-config.nix", "/mnt/etc/nixos/amazon-hvm-install-config.nix")
     m.run_command("NIXOS_CONFIG=/etc/nixos/amazon-hvm-install-config.nix nixos-install")
-    m.run_command('nix-env -iA nixos.pkgs.grub')
-    m.run_command('cp /nix/store/*-grub-0.97*/lib/grub/i386-pc/* /mnt/boot/grub')
-    m.run_command('echo "(hd1) /dev/xvdg" > device.map')
-    m.run_command('echo -e "root (hd1,0)\nsetup (hd1)" | grub --device-map=device.map --batch')
 else:
     m.upload_file("./amazon-base-config.nix", "/mnt/etc/nixos/configuration.nix")
     m.run_command("nixos-install")
@@ -87,7 +92,7 @@ else:
 m.run_command("umount /mnt")
 
 if args.hvm:
-    ami_name = "nixos-{0}-x86_64-ebs-hvm".format(version)
+    ami_name = "nixos-{0}-x86_64-hvm".format(version)
     description = "NixOS {0} (x86_64; EBS root; hvm)".format(version)
 else:
     ami_name = "nixos-{0}-x86_64-ebs".format(version)
@@ -102,58 +107,40 @@ def check():
 
 m.connect()
 volume = m._conn.get_all_volumes([], filters={'attachment.instance-id': m.resource_id, 'attachment.device': "/dev/sdg"})[0]
-if args.hvm:
-    instance = m._conn.run_instances( image_id="ami-5f491f36"
-                                    , instance_type=instance_type
-                                    , key_name=args.key_name
-                                    , placement=m.zone
-                                    , security_groups=["eelco-test"]).instances[0]
-    nixops.util.check_wait(lambda: instance.update() == 'running', max_tries=120)
-    instance.stop()
-    nixops.util.check_wait(lambda: instance.update() == 'stopped', max_tries=120)
-    old_root_volume = m._conn.get_all_volumes([], filters={'attachment.instance-id': instance.id, 'attachment.device': "/dev/sda1"})[0]
-    old_root_volume.detach()
-    volume.detach()
-    nixops.util.check_wait(lambda: volume.update() == 'available', max_tries=120)
-    nixops.util.check_wait(lambda: old_root_volume.update() == 'available', max_tries=120)
-    volume.attach(instance.id, '/dev/sda1')
-    nixops.util.check_wait(lambda: volume.update() == 'in-use', max_tries=120)
 
-    ami_id = m._conn.create_image(instance.id, ami_name, description)
+# Create a snapshot.
-    time.sleep(5)
+snapshot = volume.create_snapshot(description=description)
-    image = m._conn.get_all_images([ami_id])[0]
+print >> sys.stderr, "created snapshot {0}".format(snapshot.id)
-    nixops.util.check_wait(lambda: image.update() == 'available', max_tries=120)
-    instance.terminate()
 
-else:
+nixops.util.check_wait(check, max_tries=120)
-    # Create a snapshot.
-    snapshot = volume.create_snapshot(description=description)
-    print >> sys.stderr, "created snapshot {0}".format(snapshot.id)
 
-    nixops.util.check_wait(check, max_tries=120)
+m._conn.create_tags([snapshot.id], {'Name': ami_name})
 
-    m._conn.create_tags([snapshot.id], {'Name': ami_name})
+if not args.keep: depl.destroy_resources()
 
-    if not args.keep: depl.destroy_resources()
+# Register the image.
+aki = m._conn.get_all_images(filters={'manifest-location': 'ec2*pv-grub-hd0_1.03-x86_64*'})[0]
+print >> sys.stderr, "using kernel image {0} - {1}".format(aki.id, aki.location)
 
-     # Register the image.
+block_map = BlockDeviceMapping()
-    aki = m._conn.get_all_images(filters={'manifest-location': '*pv-grub-hd0_1.03-x86_64*'})[0]
+block_map[root_block] = BlockDeviceType(snapshot_id=snapshot.id, delete_on_termination=True, size=ebs_size, volume_type="gp2")
-    print >> sys.stderr, "using kernel image {0} - {1}".format(aki.id, aki.location)
+block_map['/dev/sdb'] = BlockDeviceType(ephemeral_name="ephemeral0")
+block_map['/dev/sdc'] = BlockDeviceType(ephemeral_name="ephemeral1")
+block_map['/dev/sdd'] = BlockDeviceType(ephemeral_name="ephemeral2")
+block_map['/dev/sde'] = BlockDeviceType(ephemeral_name="ephemeral3")
 
-    block_map = BlockDeviceMapping()
+common_args = dict(
-    block_map['/dev/sda'] = BlockDeviceType(snapshot_id=snapshot.id, delete_on_termination=True)
-    block_map['/dev/sdb'] = BlockDeviceType(ephemeral_name="ephemeral0")
-    block_map['/dev/sdc'] = BlockDeviceType(ephemeral_name="ephemeral1")
-    block_map['/dev/sdd'] = BlockDeviceType(ephemeral_name="ephemeral2")
-    block_map['/dev/sde'] = BlockDeviceType(ephemeral_name="ephemeral3")
-
-    ami_id = m._conn.register_image(
         name=ami_name,
         description=description,
         architecture="x86_64",
-        root_device_name="/dev/sda",
+        root_device_name=root_block,
-        kernel_id=aki.id,
+        block_device_map=block_map,
-        block_device_map=block_map)
+        virtualization_type=virtualization_type,
+        delete_root_volume_on_termination=True
+        )
+if not args.hvm:
+    common_args['kernel_id']=aki.id
+ami_id = m._conn.register_image(**common_args)
 
 print >> sys.stderr, "registered AMI {0}".format(ami_id)
 
@@ -197,17 +184,12 @@ test_depl.nix_exprs = [os.path.abspath("./ebs-test.nix")]
 test_depl.deploy(create_only=True)
 test_depl.machines['machine'].run_command("nixos-version")
 
-if args.hvm:
-    image_type = 'hvm'
-else:
-    image_type = 'ebs'
-
 # Log the AMI ID.
 f = open("{0}.{1}.ami-id".format(args.region, image_type), "w")
 f.write("{0}".format(ami_id))
 f.close()
 
-for dest in [ 'us-east-1', 'us-west-1', 'us-west-2', 'eu-west-1', 'ap-southeast-1', 'ap-southeast-2', 'ap-northeast-1', 'sa-east-1']:
+for dest in [ 'us-east-1', 'us-west-1', 'us-west-2', 'eu-west-1', 'eu-central-1', 'ap-southeast-1', 'ap-southeast-2', 'ap-northeast-1', 'sa-east-1']:
     if args.region != dest:
         print >> sys.stderr, "copying image from region {0} to {1}".format(args.region, dest)
         conn = boto.ec2.connect_to_region(dest)