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updog: change method of determining update availability #993

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Jul 27, 2020
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updog: change method of determining update availability #993

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6b95348
updog: remove jitters, calculate wave position to determine availability
etungsten Jul 14, 2020
a9ee7a9
waves: define a wave duration for the "last" wave
etungsten Jul 16, 2020
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4 changes: 2 additions & 2 deletions sources/updater/README.md
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Expand Up @@ -41,8 +41,8 @@ Updog will ensure that appropriate migration files are available to safely trans

### Update wave
Updates may include "wave" information which provides a way for updates to be scheduled over time for groups of Bottlerocket hosts.
Updog will find the update wave the host belongs to and jitter its update time within that range.
If the calculated time has not passed yet, Updog returns the update timestamp to the caller so it can be called again at the correct time.
Updog will find the update wave the host belongs to and calculate its time position within the wave based on its `settings.updates.seed` value.
If the calculated time has not passed, Updog will not report an update as being available.

Assuming all the requirements are met, Updog requests the update images from the TUF repository and writes them to the "inactive" partition.

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