问题
Does the google firestore database service provides a backup? If so, how do I backup the database and how do I restore in case of an error?
回答1:
Update: It is now possible to backup and restore Firebase Firestore using Cloud Firestore managed export and import service
You do it by:
Create a Cloud Storage bucket for your project - Make sure it's a regional in us-central1 or 2 / multi regional type of bucket
Set up gcloud for your project using
gcloud config set project [PROJECT_ID]
EXPORT
Export all by calling
gcloud alpha firestore export gs://[BUCKET_NAME]
Or Export a specific collection using
gcloud alpha firestore export gs://[BUCKET_NAME] --collection-ids='[COLLECTION_ID_1]','[COLLECTION_ID_2]'
IMPORT
Import all by calling
gcloud alpha firestore import gs://[BUCKET_NAME]/[EXPORT_PREFIX]/
where [BUCKET_NAME] and [EXPORT_PREFIX] point to the location of your export files. For example - gcloud alpha firestore import gs://exports-bucket/2017-05-25T23:54:39_76544/
Import a specific collection by calling:
gcloud alpha firestore import --collection-ids='[COLLECTION_ID_1]','[COLLECTION_ID_2]' gs://[BUCKET_NAME]/[EXPORT_PREFIX]/
Full instructions are available here: https://firebase.google.com/docs/firestore/manage-data/export-import
回答2:
Update July 2018: Cloud Firestore now supports managed import and export of data. See the documentation for more details:
https://firebase.google.com/docs/firestore/manage-data/export-import
[Googler here] No, right now we do not offer a managed backup or import/export service. This is something we will definitely offer in the future, we just did not get it ready for the initial Beta release.
The best way to back up right now is to write your own script using our Java/Python/Node.js/Go server SDKs, it should be fairly straightforward to download all documents from each collection and write them back if you need to.
回答3:
https://www.npmjs.com/package/firestore-backup
Is a tool that has been created to do just this.
(I did not create it, just adding it here as people will find this question)
回答4:
I am using the following work-around in order to have daily firestore backups:
I installed this globally: https://www.npmjs.com/package/firestore-backup-restore
I have a cron job that looks like this:
0 12 * * * cd ~/my/backup/script/folder && ./backup-script.sh
And my backup-script.sh looks like this:
#!/bin/sh
. ~/.bash_profile
export PATH=/usr/local/bin/
dt=$(/bin/date '+%d-%m-%Y %H:%M:%S');
echo "starting backup for $dt"
firestore-backup-restore -a ~/path/to/account/credentials/file.json -B ./backups/"$dt"
回答5:
I've written a tool that traverses the collections/documents of the database and exports everything into a single json file. Plus, it will import the same structure as well (helpful for cloning/moving Firestore databases). It's published as an NPM package. Feel free to try it and give some feedback.
https://www.npmjs.com/package/node-firestore-import-export
回答6:
A solution using Python 2.
Fork it on https://github.com/RobinManoli/python-firebase-admin-firestore-backup
First install and setup Firebase Admin Python SDK: https://firebase.google.com/docs/admin/setup
Then install it in your python environment:
pip install firebase-admin
Install the Firestore module:
pip install google-cloud-core
pip install google-cloud-firestore
(from ImportError: Failed to import the Cloud Firestore library for Python)
Python Code
# -*- coding: UTF-8 -*-
import firebase_admin
from firebase_admin import credentials, firestore
import json
cred = credentials.Certificate('xxxxx-adminsdk-xxxxx-xxxxxxx.json') # from firebase project settings
default_app = firebase_admin.initialize_app(cred, {
'databaseURL' : 'https://xxxxx.firebaseio.com'
})
db = firebase_admin.firestore.client()
# add your collections manually
collection_names = ['myFirstCollection', 'mySecondCollection']
collections = dict()
dict4json = dict()
n_documents = 0
for collection in collection_names:
collections[collection] = db.collection(collection).get()
dict4json[collection] = {}
for document in collections[collection]:
docdict = document.to_dict()
dict4json[collection][document.id] = docdict
n_documents += 1
jsonfromdict = json.dumps(dict4json)
path_filename = "/mypath/databases/firestore.json"
print "Downloaded %d collections, %d documents and now writing %d json characters to %s" % ( len(collection_names), n_documents, len(jsonfromdict), path_filename )
with open(path_filename, 'w') as the_file:
the_file.write(jsonfromdict)
回答7:
I had the same issue and created a small npm package which allows you to create a scheduled backup with Cloud Functions. It uses the new import/export feature of Firestore.
const firestoreBackup = require('simple-firestore-backup')
exports.firestore_backup = functions.pubsub.schedule('every 24 hours').onRun(firestoreBackup.createBackupHandler())
Checkout the full readme on how to set it up, it's super simple!
回答8:
Here is my Android Java code for get backup easily for any fire store data collection
First use this method to read the collection data and store in it to serialized file in the mobile device storage
private void readCollection(){
ServerSide.db.collection("Collection_name")
.get()
.addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
@Override
public void onComplete(@NonNull Task<QuerySnapshot> task) {
if (task.isSuccessful()) {
HashMap alldata = new HashMap();
for (QueryDocumentSnapshot document : task.getResult()) {
alldata.put(document.getId(),document.getData());
// ServerSide.db.collection("A_Sentences_test").document(document.getId())
// .set(document.getData());
}
try {
FileOutputStream fos = openFileOutput("filename.txt", Context.MODE_PRIVATE);
ObjectOutputStream os = new ObjectOutputStream(fos);
os.writeObject(alldata);
os.close();
fos.close();
Toast.makeText(MainActivity.this, "Stored", Toast.LENGTH_SHORT).show();
FileInputStream fis = openFileInput("filename.txt");
ObjectInputStream is = new ObjectInputStream(fis);
HashMap ad = (HashMap) is.readObject();
is.close();
fis.close();
Log.w("All data",ad+" ");
}catch (Exception e){
Log.w("errrrrrrrr",e+"");
}
} else {
Log.d("Colllllllllll", "Error getting documents: ", task.getException());
}
}
});
}
After that you can check the logcat whether the data is serialized correctly. and here is the restore code
private void writeData(){
try {
FileInputStream fis = openFileInput("filename.txt");
ObjectInputStream is = new ObjectInputStream(fis);
HashMap ad = (HashMap) is.readObject();
is.close();
fis.close();
for (Object s : ad.keySet()){
ServerSide.db.collection("Collection_name").document(s.toString())
.set(ad.get(s));
}
Log.w("ddddddddd",ad+" ");
}catch (Exception e){
e.printStackTrace();
}
}
Hope this would help
回答9:
Question is old, projects are nice but I have some concerns about the backup.
1-For blaze plan users (free) official solution is off-limit.
2-Since Free users have 50k read quota per day that limit could be a problem in live and large databases.
3-As far as I examined most of the projects does not have a time limit or so, downloading same data every time it is run.
4-Wouldn't it be better to save collections as folders and every document as seperate file and and fetch only updated documents and replace file directly.
I will probably implement my own solution but just wondering your thoughts :)
来源：https://stackoverflow.com/questions/46746604/firestore-new-database-how-do-i-backup