Hi Everyone , Need small help. I have installed growthbook on kubernetes . Deployment is up and running but i can see below error in pod logs. Could you please help.

yarn run v1.22.19
$ wsrun -p 'back-end' -p 'front-end' --no-prefix -c start
$ node dist/server.js
$ next start
ready - started server on 0.0.0.0:3000, url: <http://localhost:3000>
{"level":30,"time":1697208604637,"pid":58,"hostname":"growthbook-74486f46c4-w9htb","msg":"No config.yml file. Using MongoDB instead to store data sources, metrics, and dimensions."}
(node:58) [MONGOOSE] DeprecationWarning: Mongoose: the `strictQuery` option will be switched back to `false` by default in Mongoose 7. Use `mongoose.set('strictQuery', false);` if you want to prepare for this change. Or use `mongoose.set('strictQuery', true);` to suppress this warning.
(Use `node --trace-deprecation ...` to show where the warning was created)
{"level":30,"time":1697208608604,"pid":58,"hostname":"growthbook-74486f46c4-w9htb","msg":"Back-end is running at <http://localhost:3100> in development mode. Press CTRL-C to stop"}
{"level":40,"time":1697208638541,"pid":58,"hostname":"growthbook-74486f46c4-w9htb","err":{"type":"MongooseServerSelectionError","message":"connect ECONNREFUSED 127.0.0.1:27017","stack":"MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017\n    at NativeConnection.Connection.openUri (/usr/local/src/app/node_modules/mongoose/lib/connection.js:825:32)\n    at /usr/local/src/app/node_modules/mongoose/lib/index.js:414:10\n    at /usr/local/src/app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:41:5\n    at Promise._execute (/usr/local/src/app/node_modules/bluebird/js/release/debuggability.js:384:9)\n    at Promise._resolveFromExecutor (/usr/local/src/app/node_modules/bluebird/js/release/promise.js:518:18)\n    at new Promise (/usr/local/src/app/node_modules/bluebird/js/release/promise.js:103:10)\n    at promiseOrCallback (/usr/local/src/app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:40:10)\n    at Mongoose._promiseOrCallback (/usr/local/src/app/node_modules/mongoose/lib/index.js:1288:10)\n    at Mongoose.connect (/usr/local/src/app/node_modules/mongoose/lib/index.js:413:20)\n    at /usr/local/src/app/packages/back-end/dist/init/mongo.js:34:34\n    at Generator.next (<anonymous>)\n    at /usr/local/src/app/packages/back-end/dist/init/mongo.js:8:71\n    at new Promise (<anonymous>)\n    at __awaiter (/usr/local/src/app/packages/back-end/dist/init/mongo.js:4:12)\n    at exports.default (/usr/local/src/app/packages/back-end/dist/init/mongo.js:21:25)\n    at /usr/local/src/app/packages/back-end/dist/init/index.js:25:43","reason":{"type":"Unknown","servers":{},"stale":false,"compatible":true,"heartbeatFrequencyMS":10000,"localThresholdMS":15,"setName":null,"maxElectionId":null,"maxSetVersion":null,"commonWireVersion":0,"logicalSessionTimeoutMinutes":null}},"msg":"Failed to connect to MongoDB. Retrying with field remapping for mongodb v3 to v4"}
{"level":50,"time":1697208668549,"pid":58,"hostname":"growthbook-74486f46c4-w9htb","err":{"type":"MongooseServerSelectionError","message":"connect ECONNREFUSED 127.0.0.1:27017","stack":"MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017\n    at NativeConnection.Connection.openUri (/usr/local/src/app/node_modules/mongoose/lib/connection.js:825:32)\n    at /usr/local/src/app/node_modules/mongoose/lib/index.js:414:10\n    at /usr/local/src/app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:41:5\n    at Promise._execute (/usr/local/src/app/node_modules/bluebird/js/release/debuggability.js:384:9)\n    at Promise._resolveFromExecutor (/usr/local/src/app/node_modules/bluebird/js/release/promise.js:518:18)\n    at new Promise (/usr/local/src/app/node_modules/bluebird/js/release/promise.js:103:10)\n    at promiseOrCallback (/usr/local/src/app/node_modules/mongoose/lib/helpers/promiseOrCallback.js:40:10)\n    at Mongoose._promiseOrCallback (/usr/local/src/app/node_modules/mongoose/lib/index.js:1288:10)\n    at Mongoose.connect (/usr/local/src/app/node_modules/mongoose/lib/index.js:413:20)\n    at /usr/local/src/app/packages/back-end/dist/init/mongo.js:50:38\n    at Generator.throw (<anonymous>)\n    at rejected (/usr/local/src/app/packages/back-end/dist/init/mongo.js:6:65)","reason":{"type":"Unknown","servers":{},"stale":false,"compatible":true,"heartbeatFrequencyMS":10000,"localThresholdMS":15,"setName":null,"maxElectionId":null,"maxSetVersion":null,"commonWireVersion":0,"logicalSessionTimeoutMinutes":null}},"msg":"Failed to connect to MongoDB after retrying"}
{"level":50,"time":1697208668550,"pid":58,"hostname":"growthbook-74486f46c4-w9htb","err":{"type":"Error","message":"MongoDB connection error.","stack":"Error: MongoDB connection error.\n    at /usr/local/src/app/packages/back-end/dist/init/mongo.js:54:19\n    at Generator.throw (<anonymous>)\n    at rejected (/usr/local/src/app/packages/back-end/dist/init/mongo.js:6:65)"},"msg":"Failed to initialize application"}
error Command failed with exit code 1.
info Visit <https://yarnpkg.com/en/docs/cli/run> for documentation about this command.
`yarn start` failed with exit code 1

It is failing to connect to MongoDB

i have installed it using Dockerfile given in Growthbook repo

<https://github.com/growthbook/growthbook>

Is it running in Kubernetes

kubectl get pods --all-namespaces

? If so can you reach it from the GrowthBook instance? Is the MONGODB_URI set to the right values

MongoDB is not running in Kubernetes , However i tried installing MongoDB and set the URI in growthbook env params but still getting error

Yepher is right, you need to have Mongo running somewhere and accessible from the API container

can we use postgres instead of Mongo?

no, not currently