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Per [1], DigitalOcean provides the metadata in multiple formats. The JSON
document is the preferred endpoint.
Changes:
- Switch to the v1.json meta-data endpoint
- Identify droplet identity from SMBIOS
- Only poll for metadata when the instance is confirmed to be a droplet
- Removal of hard-coded mirrors
Additionally, centralize the gates on running 'dmidecode' on arm arches,
and update tests to address.
[1] https://developers.digitalocean.com/documentation/metadata/
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When the .pkl file is loaded, the module that it is loaded
from must have the same symbol. Ie, if booted once and got
DataSourceConfigDriveNet
then upgraded and rebooted, then next boot would show
Can't get attribute 'DataSourceConfigDriveNet'
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== background ==
DataSource Mode (dsmode) is present in many datasources in cloud-init.
dsmode was originally added to cloud-init to specify when this datasource
should be 'realized'.
cloud-init has 4 stages of boot.
a.) cloud-init --local . network is guaranteed not present.
b.) cloud-init (--network). network is guaranteed present.
c.) cloud-config
d.) cloud-init final
'init_modules' [1] are run "as early as possible". And as such, are executed
in either 'a' or 'b' based on the datasource. However, executing them means
that user-data has been fully consumed. User-data and vendor-data may have
'#include http://...' which then rely on the network being present. boothooks
are an example of the things run in init_modules.
The 'dsmode' was a way for a user to indicate that init_modules
should run at 'a' (dsmode=local) or 'b' (dsmode=net) directly.
Things were further confused when a datasource could provide networking
configuration. Then, we needed to apply the networking config at 'a'
but if the user had provided boothooks that expected networking, then the
init_modules would need to be executed at 'b'. The config drive datasource
hacked its way through this and applies networking if *it* detects it is
a new instance.
== Suggested Change ==
The plan is to
1. incorporate 'dsmode' into DataSource superclass
2. make all existing datasources default to network
3. apply any networking configuration from a datasource on first boot only
apply_networking will always rename network devices when it runs.
for bug 1579130.
4. run init_modules at cloud-init (network) time frame unless datasource
is 'local'.
5. Datasources can provide a 'first_boot' method that will be called when
a new instance_id is found. This will allow the config drive's write_files
to be applied once.
Over all, this will very much simplify things. We'll no longer have
2 sources like DataSourceNoCloud and DataSourceNoCloudNet, but would just
have one source with a dsmode.
== Concerns ==
Some things have odd reliance on dsmode. For example, OpenNebula's get_hostname
uses it to determine if it should do a lookup of an ip address.
== Bugs to fix here ==
http://pad.lv/1577982 ConfigDrive: cloud-init fails to configure network from network_data.json
http://pad.lv/1579130 need to support systemd.link renaming of devices in container
http://pad.lv/1577844 Drop unnecessary blocking of all net udev rules
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In Cloudsigma, the datasource would warn if no product id was availble.
SmartOS would log exception. This fixes both of those, changing
the warning to a debug message.
LP: #1569469
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On systems with a ttyS1 and nothing attached, the read attempts
that the cloud sigma datasource would do would block.
Also, Add timeouts for reading/writting from/to the serial console
LP: #1316475
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* do not run dmidecode on arm.
* line length
* comment that 60 second time out is expected
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This adds the ability to read a 'base64_fields' entry in the metadata,
and if cloud-init-userdata is listed in that, then content will be
base64 decoded first.
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This allows users of CloudSigma's VM to encode their user data with base64.
In order to do that thet have to add the ``cloudinit-user-data`` field to
the ``base64_fields``. The latter is a comma-separated field with
all the meta fields whit base64 encoded values.
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The CloudSigma datasource would attempt to read /dev/ttyS1
and if not found would warn (which gets logged to stdout by default).
Better to just debug.
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Previously this had 'local' as the default datasource mode, meaning
that user-data code such as boot hooks and such would not be guaranteed to have
network access. That would be out of sync with the expectation on other
platforms where the default is 'network up'.
The user can still specify 'dsmode' as local if necessary and the
local datasource will claim itself found.
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