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initialize.go
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initialize.go
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package state
import (
"context"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
// choose right scenario to start (installation/deletion)
func sFnInitialize(ctx context.Context, r *reconciler, s *systemState) (stateFn, *ctrl.Result, error) {
s.saveSnapshot()
instanceIsBeingDeleted := !s.instance.GetDeletionTimestamp().IsZero()
instanceHasFinalizer := controllerutil.ContainsFinalizer(&s.instance, r.finalizer)
if !instanceHasFinalizer {
return noFinalizerStep(ctx, r, s, instanceIsBeingDeleted)
}
// default instance and create necessary essentials
s.setup(ctx, r)
// in case instance is being deleted and has finalizer - delete all resources
if instanceIsBeingDeleted {
return nextState(sFnDeleteResources)
}
return nextState(sFnRegistryConfiguration)
}
func noFinalizerStep(ctx context.Context, r *reconciler, s *systemState, instanceIsBeingDeleted bool) (stateFn, *ctrl.Result, error) {
// in case instance has no finalizer and instance is being deleted - end reconciliation
if instanceIsBeingDeleted {
// stop state machine
return stop()
}
// in case instance does not have finalizer - add it and update instance
controllerutil.AddFinalizer(&s.instance, r.finalizer)
err := r.client.Update(ctx, &s.instance)
// stop state machine with potential error
return stopWithErrorOrRequeue(err)
}