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Add connectivity_url to Oracle's EphemeralDHCPv4
On bionic, when trying to bring up the EphemeralDHCPv4, it's possible
that we already have a route defined, which will result in an error when
trying to add the DHCP route. Use the connectivity_url to check if we
can reach the metadata service, and if so, skip the EphemeralDHCPv4.
The has_url_connectivity function has also been modified to take
a dict of kwargs to send to readurl.
LP: #1939603
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This just separates the reading of dmi values into its own file.
Some things of note:
* left import of util in dmi.py only for 'is_container'
It'd be good if is_container was not in util.
* just the use of 'util.is_x86' to dmi.py
* open() is used directly rather than load_file.
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* v2 of the API is now default with fallback to v1.
* Refactored the Oracle datasource to fetch version, instance, and vnic metadata simultaneously.
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The /opc/v1/ metadata endpoints[0] are universally available in Oracle
Cloud Infrastructure and the OpenStack endpoints are considered
deprecated, so we can refactor the data source to use the OPC endpoints
exclusively. This simplifies the datasource code substantially, and
enables use of OPC-specific attributes in future.
[0] https://docs.cloud.oracle.com/en-us/iaas/Content/Compute/Tasks/gettingmetadata.htm
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* test_oracle: sort imports
* DataSourceOracle: sort imports
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Bring it into line with the current state of the code (by dropping the
now-untrue caveat).
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Add support for detecting netfailover[1] device 3-tuple in networking
layer. In the Oracle datasource ensure that if a provided network
config, either fallback or provided config includes a netfailover master
to remove any MAC address value as this can break under 3-netdev
as the other two devices have the same MAC.
1. https://www.kernel.org/doc/html/latest/networking/net_failover.html
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When rendering secondary vnic configuration from IMDS, only emit
configuration for the IP and MTU values only. Add support to mutate
either a v1 or a v2 network_config input.
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The Oracle platform provides networking configuration from two sources:
* the primary interface configuration comes from the initramfs, because
Oracle instance all iSCSI boot
* secondary interface configuration comes from an IMDS accessed over
HTTP
As we need to combine these two sources of network configuration, the
default "prefer initramfs config over data source config" behaviour
isn't appropriate; we would never get the IMDS interfaces via that
route. Instead, the Oracle data source has code to combine these two
sources, so we prefer its network configuration over the initramfs
configuration.
(This is not appropriate default behaviour, because _in general_ data
sources won't know how to merge initramfs-provided configuration into
their provided configuration, so switching this order for all data
sources would result in initramfs configuration being discarded on any
data source that implements network_config.)
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Oracle Cloud Infrastructure's Instance Metadata Service provides network
configuration information for non-primary NICs. This commit introduces
support, on Virtual Machines[0], for fetching that network metadata,
converting it to v1 network-config[1] and combining it into the network
configuration generated for the primary interface.
By default, this behaviour is not enabled. Configuring the Oracle
datasource to `configure_secondary_nics` enables it:
datasource:
Oracle:
configure_secondary_nics: true
Failures to fetch and generate secondary NIC configuration will log a
warning, but otherwise will not affect boot.
[0] The expected use of the IMDS-provided network configuration is
substantially different on Bare Metal Machines, so support for that
will be addressed separately.
[1] This is v1 config, because cloudinit.net.cmdline generates v1 config
and we need to integrate the secondary NICs into that configuration.
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Previously "cmdline" network configuration could be either
user-specified network-config=... configuration data, or
initramfs-provided configuration data. Before data sources could modify
the order in which network config sources were considered, this
conflation didn't matter (and, indeed, in the default data source
configuration it will continue to not matter).
However, it _is_ desirable for a data source to be able to specify that
its network configuration should be preferred over the
initramfs-provided network configuration but still allow explicit
network-config=... configuration passed to the kernel cmdline to
continue to override both of those sources.
(This also modifies the Oracle data source to use read_initramfs_config
directly, which is effectively what it was using
read_kernel_cmdline_config for previously.)
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Add the following instance-data.json standardized keys:
* v1._beta_keys: List any v1 keys in beta development,
e.g. ['subplatform'].
* v1.public_ssh_keys: List of any cloud-provided ssh keys for the
instance.
* v1.platform: String representing the cloud platform api supporting the
datasource. For example: 'ec2' for aws, aliyun and brightbox cloud
names.
* v1.subplatform: String with more details about the source of the
metadata consumed. For example, metadata uri, config drive device path
or seed directory.
To support the new platform and subplatform standardized instance-data,
DataSource and its subclasses grew platform and subplatform attributes.
The platform attribute defaults to the lowercase string datasource name at
self.dsname. This method is overridden in NoCloud, Ec2 and ConfigDrive
datasources.
The subplatform attribute calls a _get_subplatform method which will
return a string containing a simple slug for subplatform type such as
metadata, seed-dir or config-drive followed by a detailed uri, device or
directory path where the datasource consumed its configuration.
As part of this work, DatasourceEC2 methods _get_data and _crawl_metadata
have been refactored for a few reasons:
- crawl_metadata is now a read-only operation, persisting no attributes on
the datasource instance and returns a dictionary of consumed metadata.
- crawl_metadata now closely represents the raw stucture of the ec2
metadata consumed, so that end-users can leverage public ec2 metadata
documentation where possible.
- crawl_metadata adds a '_metadata_api_version' key to the crawled
ds.metadata to advertise what version of EC2's api was consumed by
cloud-init.
- _get_data now does all the processing of crawl_metadata and saves
datasource instance attributes userdata_raw, metadata etc.
Additional drive-bys:
* unit test rework for test_altcloud and test_azure to simplify mocks
and make use of existing util and test_helpers functions.
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This adds a Oracle specific datasource that functions with OCI.
It is a simplified version of the OpenStack metadata server
with support for vendor-data.
It does not support the OCI-C (classic) platform.
Also here is a move of BrokenMetadata to common 'sources'
as this was the third occurrence of that class.
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