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Questions tagged [replicaset]

This tag is used mostly for a MongoDB replica set (a group of "mongod" processes that maintain the same data set) and rarely for a Kubernetes ReplicaSet (the next-generation Replication Controller with set-based selector support).

583 questions
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3 answers

What is the difference between ReplicaSet and ReplicationController?

From what I can tell in the documentation, a ReplicaSet is created when running a Deployment. It seems to support some of the same features of a ReplicationController - scale up/down and auto restart, but it's not clear if it supports rolling…
David Knell
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2 answers

Mongo DB - difference between standalone & 1-node replica set

I needed to use Mongo DB transactions, and recently I understood that transactions don't work for Mongo standalone mode, but only for replica sets (Mongo DB with C# - document added regardless of transaction). Also, I read that standalone mode is…
Metheny
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37
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5 answers

How to check secondary is synced now or not

there is the replica with three member (primary,secondary,secondary). Suppose one of secondaries down for a day, after return secondary back to replica how can i find, is it synced yet or not? I did that in testing environment, But couldn't find…
irmorteza
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32
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5 answers

How to convert a MongoDB replica set to a stand alone server

Consider, I have 4 replicate sets and the config is as follows: { "_id": "rs_0", "version": 5, "members" : [ {"_id": 1, "host": "127.0.0.1:27001"}, {"_id": 2, "host": "127.0.0.1:27002"}, {"_id": 3, "host": "127.0.0.1:27003"}, {"_id": 4,…
Amol M Kulkarni
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26
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2 answers

MongoDB Connection String to Replica Set

I am looking at http://mongodb.github.io/node-mongodb-native/driver-articles/mongoclient.html and when you scroll to the section "A replicaset connect using no acknowledgment by default and readPreference for secondary" it stated a connection string…
Mark Thien
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25
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7 answers

Mongo container with a replica set with only one node in docker-compose

I want to create a Docker container with an instance of Mongo. In particular, I would like to create a replica set with only one node (since I'm interested in transactions and they are only available for replica sets). Dockerfile FROM mongo RUN echo…
StackUser
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20
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2 answers

MongoDB change stream replica-set limitation

What is the reasoning behind only making change streams available on replica sets?
Daniel F
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19
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1 answer

MongoDB replica set with simple password authentication

I have a MongoDB replica set of 3 servers (1 primary, 1 secondary, 1 arbiter; this is the default replica set created by Google Cloud 1-click install). The 2 config files (mongod.conf) of primary server and secondary server have been changed with…
Dee
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15
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5 answers

MongoDB Replica Set : Cannot use non-local read concern until replica set is finished initializing

I tried to create a replica set following instruction such as : https://hevodata.com/learn/mongodb-replica-set-3-easy-methods/ Sadly, I have a problem at the first step : Problem The command : mongod --port 27017 --dbpath "C:\Program…
Macab
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14
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1 answer

Connecting to MongoDB Atlas using Golang mgo: Persistent no reachable server to replica set

I have a replica set from MongoDB atlas, to which I can connect with ANY other language, and regular mongo client, with the URL provided with the format…
hece
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14
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4 answers

Mongoose connection to replica set

I tried to connect to MongoDB replicaSet via mongoose. I used this link. Configuration json: "mongoose": { "uri": "mongodb://localhost:27022/chat,localhost:27021,localhost:27020", "options": { "replset": { "rs_name": "rs0" }, …
lor1an
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13
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3 answers

Number of active connections on the server reached to max

I am working with mongodb and nodejs. I have mongodb hosted on Atlas. My backend had been working perfectly but now it is sometimes getting stuck and when I see the analytics on mongodb atlas it shows maximum number of active connections reached to…
Profer
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13
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5 answers

MongoDB Replica Set Member State is "OTHER"

Three members, primary & secondary - and a third one that's "OTHER" - I can't find any info on that state, not sure what to do, I've restarted the instance, but it always comes-up the same. Can find no documentation on that state. I'm new to replica…
Jolly
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13
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1 answer

MongoDB: Can't initiate replica set; 'has data already, cannot initiate set'

I've got a MongoDB instance, set up using a config file and a key file. I'd like to initiate a replica set using pymongo. When I attempt to initiate the replcia set, by executing a python script against the server which will become the replica set…
Mr.Budris
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13
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3 answers

Error while adding a secondary instance in mongodb replica set

I am trying to deploy mongodb replica set . I have made my mongodb instance as primary of the replica . Now i am trying to add another mongodb instance hosted at different iP address, as secondary of the replica, but i am getting the following error…
Anuj Jain
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