feat(db): upgrade auto-backup backup and rollback support EE-867 EE-1158 (#5341)

* backport migration EE code structure

* filesystem copy function

* set db status to updating before migration - reset on completion

* support for auto-backup on version upgrade

* - rollback cli flag support (with confirmation)
- rollback implementation backport from EE

* removed edition as it is not required in CE

* migrated test datastore from bolttest to bolt package to make it usable for testing

* backported failsafe migration

* - backported tests from EE
- refactored tests to use test datastore

* test store implementing datastore interface

* addressed PR issues/improvements

* refactor test

* added backup file removal error logging

* resolved conflicts, updated code

* fixed missing bolttest package - migrated to bolt

* feat(migration): wrap migration errors to provide context for failure EE-1742 (#5711)

* feat(migrator): wrap errors to provide more context to failures EE-1742

* add overall failure back in. diff log file

* updated helm tests pointing to correct teststore

Co-authored-by: Matt Hook <hookenz@gmail.com>

api/bolt/teststore.go

@@ -0,0 +1,72 @@
+package bolt
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+
+	"github.com/pkg/errors"
+	"github.com/portainer/portainer/api/filesystem"
+)
+
+var errTempDir = errors.New("can't create a temp dir")
+
+func MustNewTestStore(init bool) (*Store, func()) {
+	store, teardown, err := NewTestStore(init)
+	if err != nil {
+		if !errors.Is(err, errTempDir) {
+			teardown()
+		}
+		log.Fatal(err)
+	}
+
+	return store, teardown
+}
+
+func NewTestStore(init bool) (*Store, func(), error) {
+	// Creates unique temp directory in a concurrency friendly manner.
+	dataStorePath, err := ioutil.TempDir("", "boltdb")
+	if err != nil {
+		return nil, nil, errors.Wrap(errTempDir, err.Error())
+	}
+
+	fileService, err := filesystem.NewService(dataStorePath, "")
+	if err != nil {
+		return nil, nil, err
+	}
+
+	store, err := NewStore(dataStorePath, fileService)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = store.Open()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if init {
+		err = store.Init()
+		if err != nil {
+			return nil, nil, err
+		}
+	}
+
+	teardown := func() {
+		teardown(store, dataStorePath)
+	}
+
+	return store, teardown, nil
+}
+
+func teardown(store *Store, dataStorePath string) {
+	err := store.Close()
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	err = os.RemoveAll(dataStorePath)
+	if err != nil {
+		log.Fatalln(err)
+	}
+}