Take into account multiple ways of redis persistance when deleting the existing data before the import.

There might be ui pods that have failed. Ensure that only running one are used.

Author: IgorBenko

docs/self-hosted/kubernetes-migration-guide.md

@@ -144,8 +144,9 @@ After each scale command, use `kubectl get pods` again to verify that the redis
 ```
 export PV_NAME=$(kubectl get pvc redis-data-redis-0 -ojsonpath='{.spec.volumeName}')
 kubectl scale statefulset -n default redis --replicas 0
-rm /var/openebs/local/$PV_NAME/appendonly.aof
-cp packagist_redis.rdb /var/openebs/local/$PV_NAME/dump.rdb
+sudo rm -f /var/openebs/local/$PV_NAME/appendonly.aof
+sudo rm -rf /var/openebs/local/$PV_NAME/appendonlydir
+sudo cp packagist_redis.rdb /var/openebs/local/$PV_NAME/dump.rdb
 kubectl scale statefulset redis --replicas 1
 ```
 
@@ -162,7 +163,7 @@ Please note that depending on the size of the `packagist_storage.tar.gz` file an
 it can take several minutes for this command to finish.
 
 ```
-export UI_POD=$(kubectl get pods --no-headers -o custom-columns=":metadata.name"|grep ui-)
+export UI_POD=$(kubectl get pods --field-selector=status.phase=Running --no-headers -o custom-columns=":metadata.name"|grep ui-)
 kubectl cp packagist_storage.tar.gz $UI_POD:/tmp/packagist_storage.tar.gz -c ui
 kubectl exec $UI_POD -c ui -- /bin/sh -c "/srv/manager/bin/console packagist:self-hosted:migrate-storage import /tmp/packagist_storage.tar.gz && rm /tmp/packagist_storage.tar" 
 ```