Use json to generate .slapos-disk-permission in a way, that devperm manager
will be able to consume it.

See merge request nexedi/slapos!907

slapgrid is the old name of slapos node command.

This reverts commit cc1713c3.

Unfortunately a lot of installation OS ISOs (like Debian 9 and 10) do not
support such device during installation process, because of missing drivers
on the OS CD.

Also note the ISOs limitation in the advanced field.

By using virtio-scsi-pci it's possible to attach many CD-ROMs to be boot from.

Thanks to using to draft-06 schema oneOf the "Boot image" field provides a
list of images to select one to boot.

As cpu-count and ram-size can be setup freely by the user, the cpu-max-count
and ram-max-size shall follow it.

Otherwise it generates hard to track issues with starting VMs.

The image-url-list parameter is passed-thru only if it's present in the
original request, as the default instance differentiates correctly between
parameter existence or emptiness (or being None).

Downloadable images are enabled when key image-url-list (described in
instance-kvm-input-schema.json) is present.

Images are downloaded outside of partition processing, as this can take a lot
of time by template/image-download-controller.py

Configuration is checked and cleaned up by
template/image-download-config-creator.py

Promises are used for:

 * checking if the current configuration from the request has been processed
 * checking status of configuration generation, image download process and
   checksum validity

Details about errors are exposed by using monitor stack provided HTTP server,
so that user is able to take informed decision about how to fix the problem.

done with:

     npm install
     git ls-files | grep -v '\/unstable\/' | xargs ./node_modules/.bin/eclint fix
     git ls-files | grep buildout.hash.cfg | xargs ./update-hash

don't add automatic route when adding IP address on interface because
the automatic route doesn't add "via XXXXXX" gateway option.

In KVM setup, the host machine is the gateway. We need to go through the
gateway because we can't reach directly the other VM running on
different slaptap interfaces.

When we have a section to generate a python interpreter with eggs built
in, don't name this `extra-eggs` because the meaning is not clear.

This change is related to 11210de0.

Dead code from the previous commit has also been removed.

This avoids duplication of information.

This requires the "prerm" plugin be enabled to be used in addition to devperm. 

I tested on production and it works fine.

/cc @tomo

/reviewed-on nexedi/slapos!687

If there is IPv6 on both interface, Linux will put a default route on
ens3 preventing IPv6 to work correctly on ens4.
Even disabling totally IPv6 from inside the host on ens3 may not work.
It is safer to disable it from qemu process directly. Also, it will ease
the configuration of the host.

NBD server is not running until an image is uploaded. Make sure that the
promise doesn't fail until the image is there. Also display a WARNING in
the connection parameter to say that the NBD server is not running.

When the image is a block device, the guest must also run Linux >= 5.0.

In 95c05120, a published parameter "ssh-url" was added
to the webrunner, clashing with the existing "ssh-url" parameter used by the resilient
stack (which is extended by webrunner).
As the new "ssh-url" is public and read by customers, it doesn't make sense to rename
it to something more slaprunner-ished, more especially it already existis "ssh-command",
so if a second parameter was named "runner-ssh-url" it wouldn't make sense to the user...

This change had to be propagated to all the software releases extending the resilient stack.

Finally, I think that stacks should use namespaces to avoid conflicts with the software
releases extending them. Currently, we are doing the opposite and are using namespaces
for software release to avoid conflicting with their stack : for exemple, in stack/resilient
we have a section [sshd-raw-server] and in the software/slaprunner we have [runner-sshd-raw-server].
This situation will create clashes when one software release extends 2 stacks, as nothing
guarantees that 2 stacks have no conflicting section name, config file path, ...