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If the variant file has defined mandatory input variables like IMG_ID
the verification script should not fail to find them.

This fixes #35

snf-image wasn't working correctly with API versions prior to 20 anyway.

Set default values for Pithos storage backend type, RADOS conf file,
RADOS map and block pools.

Pass -s flag to kpartx to fix a potential race condition when deploying
(ext|ntfs)dump images. Without -s, kpartx will return right after
signaling the device mapper to create the partition block devices. This
does not guarantee that the partitions will have been created when
snf-image will try to use them.

 * Fix various spelling errors
 * Add module comments on all python utilities

snf-image does not make any use of this utility any more

The default Virtual RAM size for the helper VM used to be 256MB

This can be used to overwrite the size of the virtual RAM that will
be given to the helper VM

Fix a bug where API params like CONFIG_URL or IMG_PASSWORD where
checked and used by scripts other that `create' (e.g. `import' and
`export'). This may lead to errors. The CONFIG_URL may not be valid
after the image creation

Add extra code to check if the image path ends up being outside the
IMAGE_DIR directory

This used to be file://

The variable should only exist in snf-image-update-helper. If the
user wants to overwrite the value, he should create it in
/etc/default/snf-image-update-helper

Rename snf-image-create-fixed-helper script to snf-image-create-helper.
Also remove the command that will create a tar archive of the helper
files under /tmp

When you run snf-image-create-fixed-helper an archive of the fixed
helper is created under /tmp

Move the old snf-image-update-helper to snf-image-create-fixed-helper
and make the new snf-image-update-helper download a fixed helper image
specified by the HELPER_URL variable.

The check for supported hypervisors should only executed by scripts
that comply to the ganeti api.

The script should always exit with an error status after a log_error
command

Add check_helper_rc and check_helper_result functions called by
kvm-common.sh and xen-common.sh.

* Add custom vif script for the helper VM
* Cleanup helper code

This can be used to configure the bridge on which the helper's VM
nic will be attached when using XEN.

Change HELPER_SIZE to 600 and HELPER_SOFT_TIMEOUT to 120

Add a new HELPER_SIZE variable for this purpose. Default size is
hardcoded to 400MB

Remove:
	HELPER_CACHE_DIR
	HELPER_IMG
	HELPER_KERNEL
	HELPER_INITRD
 	TIMELIMIT
Add:
	TIMEOUT

In configure, remove:
	--enable-network-backend
	--with-helper-img
	--with-helper-kernel
	--with-helper-initrd

Modify pithcat to be able to parse and work with URLs of the form:
`pithosmap://hash/size' which are neeed for archipelagos.

Make sure local variables are defined as local before they get assigned.
Having variables get defined and assigned in one line like this:

local var=foo

can sometimes cause problems. For example, this line:

local var=$(false)

will return 0 and the script will not fail if set -x is defined.

snf-image-update-helper will only install a pkg retrieved from the
apt unless -p option is specified.

This can be used to enable or disable the version check between
snf-image-host and snf-image-helper at the end of the update-helper
script.

Using package caches to create the helper image is dangerous now that
snf-image-helper is automatically retrieved.

The files hosted in this directory will be added in the
/etc/apt/preferences.d directory of the helper image before multistrap
runs.

Do not send through the monitor pipe the error messages. They may
contain internal sensitive information. Create a new report_error
function for sending errors through the monitoring pipe.

Conflicts:
	snf-image-host/create
	snf-image-host/snf-image-update-helper.in

By default this directory is $(LOCALSTATEDIR)/cache/snf-image/helper