Allow package users to provide custom callback which will
execute whenever a healthcheck fails.
Allow package users to provide custom callback which will
execute whenever a healthcheck succeeds.
This commit makes sure that no loop variables or other temporary
variables are accessed directly in a goroutine but are instead passed
into the goroutine through a parameter. This makes sure a copy of the
value is put on the stack and is not changed while the outside loop
continues.
This commit adds a check to the returned error from calling retryCheck
such that when the max number of attempts is reached, the health check
will quit.
In this commit, we bump up the logging for failed healthchecks from
`debug` to `info`. This should help us get to the bottom of the current
set of reported false positives that are causing `lnd` nodes to
erroneously shutdown.
Add a new health check package which will periodically poll health
check functions and shutdown if we do not succeed after our set number
of attempts. The first check that we add is one for our chain backend,
to ensure that we are connected to a bitcoin node.
