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* cloudinit: replace "import mock" with "from unittest import mock"
* test-requirements.txt: drop mock
Co-authored-by: Chad Smith <chad.smith@canonical.com>
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The KVPs currently being emitted to the .kvp_pool file can have
duplicate keys which is wrong since these keys should be unique.
The situation can occur if for example one azure function
called twice or more and this function is reporting telemetry
through the use of KVPs. Any KVP consumer can get confused by
the duplicate keys and a race condition can and have occurred.
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Collect and record the following information through KVP:
+ timestamps related to kernel initialization and systemd activation
of cloud-init services
+ system information including cloud-init version, kernel version,
distro version, and python version
+ diagnostic events for the most common provisioning error issues
such as empty dhcp lease, corrupted ovf-env.xml, etc.
+ increasing the log frequency of polling IMDS during reprovision.
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+ Truncate KVP Pool file to prevent stale entries from
being processed by the Hyper-V KVP reporter.
+ Drop filtering of KVPs as it is no longer needed.
+ Batch appending of existing KVP entries.
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Linux guests can provide information to Hyper-V hosts via KVP.
KVP allows the guests to provide any string key-value-pairs back to the
host's registry. On linux, kvp communication pools are presented as pool
files in /var/lib/hyperv/.kvp_pool_#.
The following reporting configuration can enable this kvp reporting in
addition to default logging if the pool files exist:
reporting:
logging:
type: log
telemetry:
type: hyperv
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