如何通过 ssh 隧道将数据保存到远程 mongoDB？ （拒绝连接）

Question

I have two computers: Ubuntu1 and Ubuntu2. Ubuntu1 runs MongoDB with database Sacred3. I want to connect from U2 to U1 via ssh and store there my experiment results.

What I tried and failed: 1. I installed mongo DB, created sacred3, I have ssh key to it. I edited /etc/mongod.conf adding:

# network interfaces net: port: 27017 bindIp: 0.0.0.0

Then I enabled port forwarding with

ssh -fN -i ~/.ssh/sacred_key-pair.pem -L 6666:localhost:27017 ubuntu@106.969.696.969 // (with proper ip)

so, as I undertstand, if I connect to my localhost:6666 it will be forwarded to 106.969.696.969:27017

So after that, I'm runnig an experiment with Sacred framework :

python exp1.py -m localhost:6666:sacred3

and this should write experiment to remote DB, HOWEVER i I get:

pymongo.errors.ServerSelectionTimeoutError: localhost:27017: [Errno 111] Connection refused

which is driving me mad. please help!

#

below contents of exp1.py:

 from sacred import Experiment from sacred.observers import MongoObserver ex = Experiment() ex.observers.append(MongoObserver.create()) def compute(): summ = layer1 - layer2 return summ @ex.config def my_config(): hp_list = [{"neurons": [32,32], "dropout": 1.0}, {"neurons": [32,32], "dropout": 0.7}, {"neurons": [32,16], "dropout": 0.9}, {"neurons": [24,16], "dropout": 0.9}, {"neurons": [24,8], "dropout": 0.9}, {"neurons": [16,8], "dropout": 0.9}, {"neurons": [64,64], "dropout": 0.9}, {"neurons": [64,64], "dropout": 0.7}, {"neurons": [64,32], "dropout": 0.9}, {"neurons": [64,32], "dropout": 0.7}, {"neurons": [48,32], "dropout": 0.9}, {"neurons": [48,32], "dropout": 0.7}, {"neurons": [48,16], "dropout": 0.9}, {"neurons": [48,16], "dropout": 0.7},] n_epochs = 2 @ex.capture def training_loop(hp_list, n_epochs): for j in hp_list: print("Epoch: ", n_epochs) # layer1 = random.randint(18,68) # layer2 = random.randint(18,68) # layer3 = random.randint(18,68) layer1 = j["neurons"][0] layer2 = j["neurons"][1] dropout_ratio = j["dropout"] print("WHATS UUUUUP",j, layer1, layer2, dropout_ratio, sep="_") # vae_training_loop_NN_DO(i, layer1, layer2, dropout_ratio ) @ex.automain def my_main(): training_loop()

Answer 1

According to the documentation supplied , it looks like you're creating two observers, or overriding the connection argument you passed with -m , with the MongoObserver.create() specified in the code which uses the default mongo host and port localhost:27017 . You either supply the observer connection via the -m argument or in code, not both.

Try removing the MongoObserver.create() line altogether, or hardcoding the connection arguments: MongoObserver(url='localhost:6666', db_name='sacred3')

Also, it looks like your mongo host is not liking the binding to localhost so you should also replace localhost in your ssh command with 127.0.0.1 or [::1] , eg ssh -fN -i ~/.ssh/sacred_key-pair.pem -L 6666:127.0.0.1:27017 ubuntu@106.969.696.969 or ssh -fN -i ~/.ssh/sacred_key-pair.pem -L 6666:[::1]:27017 ubuntu@106.969.696.969