This is a massive commit, but nothing related to runtime has actually
changed, only the lint errors have changed.
Change-type: patch
Signed-off-by: Cameron Diver <cameron@balena.io>
This commit does two related things:
* We make the poll interval a random time between 0.5 and 1.5 times the configured interval.
* We introduce the BALENA_SUPERVISOR_INSTANT_UPDATE_TRIGGER configuration variable, that defaults to true. If this variable is set
to false, then calls to /v1/update are ignored, and on startup the supervisor waits for a poll interval before getting the target state.
This will help especially on cases where there's a large number of devices on a single network. By disabling instant updates and setting a large
poll interval, we can now achieve a sitation where not all devices apply an update at the same time, which can help avoid
overwhelming the network.
Change-type: minor
Signed-off-by: Pablo Carranza Velez <pablo@balena.io>
If a value is requested which does not pass validation, we instead set
it to the default value, to ensure that the state engine continues to
work and move towards the target state.
Change-type: minor
Closes: #938
Signed-off-by: Cameron Diver <cameron@balena.io>
In the case of an airgapped supervisor, with a target state that
requests the vpn be enabled, the supervisor will constantly loop on
trying to set the vpn to on. Unfortunately the vpn requires an internet
connection to be configured, so it will never be turned on.
We add the concept of no-ops to the device-config state change steps,
and don't end the state engine transition while these are present
(similar to how image pulls are implemented).
Change-type: minor
Signed-off-by: Cameron Diver <cameron@balena.io>
