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DEP_NETWORK is removed since the network_config must
run at each boot. New EventType.BOOT event is used
for that.
Network is brought up early to fetch the metadata which
is required to configure the network (ipv4 and/or v6).
Adds unittests for the following and fixes test_common for
LOCAL and NETWORK sets.
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In commit e9e8616, there was an inversion of the logic of the
exception_cb return value meaning, breaking the (network) OpenStack
DataSource, which implemented exception_cb as should_retry_cb, returning
True when a retry should be done and False when the retry loop should
be broken and the exception reraised again immediately.
The OpenStack DS was the only user of this callback at the time and not
touched by the commit (nor did the commit message mention an intended
change), so this almost certainly happened by mistake.
These days, we have a second user of the callback in DataSourceScaleway.
It uses the new logic, so it needs change if we fix the meaning of the
return value.
This patch reverts the meaning of url_helper.read_url() execption_cb
to the old semantics. It updates the comment and adjusts the Scaleway
datasource.
The patch has been tested on Open Telekom Cloud (which uses the
OpenStack network Datasource) where previously a missing user_data
and network_data.json would be retried 6 times each despite them
not being present (they are optional!) and the server repsonding
with a correct 404. After the patch, boot times are 10s faster,
as we no longer pointlessly retry these files.
LP: #1702160
LP: #1298921
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DataSource.get_hostname call signature changed to allow for metadata_only
parameter. The metadata_only=True parameter is passed to get_hostname
during init-local stage in order to set the system hostname if present in
metadata prior to initial network bring up.
Fix subclasses of DataSource which have overridden get_hostname to allow
for metadata_only param.
LP: #1757176
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Each DataSource subclass must define its own get_data method. This branch
formalizes our DataSource class to require that subclasses define an
explicit dsname for sourcing cloud-config datasource configuration.
Subclasses must also override the _get_data method or a
NotImplementedError is raised.
The branch also writes /run/cloud-init/instance-data.json. This file
contains all meta-data, user-data and vendor-data and a standardized set
of metadata keys in a json blob which other utilities with root-access
could make use of. Because some meta-data or user-data is potentially
sensitive the file is only readable by root.
Generally most metadata content types should be json serializable. If
specific keys or values are not serializable, those specific values will
be base64encoded and the key path will be listed under the top-level key
'base64-encoded-keys' in instance-data.json. If json writing fails due to
other TypeErrors or UnicodeDecodeErrors, a warning log will be emitted to
/var/log/cloud-init.log and no instance-data.json will be created.
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Here we add and enable by default a datasource for Scaleway cloud.
The datasource quickly exits unless one of three things:
a.) 'Scaleway' found as the system vendor
b.) 'scaleway' found on the kernel command line.
c.) the directory /var/run/scaleway exists (this is currently created
by the scaleway initramfs module).
One interesting bit of this particular datasource is that it requires
the source port of the http request to be < 1024.
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