Multicontainer Docker application failing on deploy - node.js

Question

So I have a problem with deploying my application to elastic beanstalk at Amazon. My application is a multi-container Docker application that includes node server and mongoDB inside of it. Somehow the application crashes every time and I get this bizarre error from mongoDB.
Error is as follows:
18-05-28T12:53:02.510+0000 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 3867 processes, 32864 files. Number of processes should be at least 16432 : 0.5 times number of files.
2018-05-28T12:53:02.540+0000 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
2018-05-28T12:53:02.541+0000 I NETWORK [initandlisten] waiting for connections on port 27017
2018-05-28T12:53:03.045+0000 I CONTROL [signalProcessingThread] got signal 15 (Terminated), will terminate after current cmd ends
2018-05-28T12:53:03.045+0000 I NETWORK [signalProcessingThread] shutdown: going to close listening sockets...
2018-05-28T12:53:03.045+0000 I NETWORK [signalProcessingThread] removing socket file: /tmp/mongodb-27017.sock
2018-05-28T12:53:03.045+0000 I FTDC [signalProcessingThread] Shutting down full-time diagnostic data capture
2018-05-28T12:53:03.047+0000 I STORAGE [signalProcessingThread] WiredTigerKVEngine shutting down
2018-05-28T12:53:03.161+0000 I STORAGE [signalProcessingThread] shutdown: removing fs lock...
2018-05-28T12:53:03.161+0000 I CONTROL [signalProcessingThread] now exiting
2018-05-28T12:53:03.161+0000 I CONTROL [signalProcessingThread] shutting down with code:0
This is my Dockerrun.aws.json file:
{
"AWSEBDockerrunVersion": 2,
"volumes":[
{
"name": "mongo-app",
"host": {
"sourcePath": "/var/app/mongo-app"
}
},
{
"name": "some-api",
"host": {
"sourcePath": "/var/app/some-api"
}
}
],
"containerDefinitions": [
{
"name": "mongo-app",
"image": "mongo:latest",
"memory": 128,
"portMappings": [
{
"hostPort": 27017,
"containerPort": 27017
}
],
"mountPoints": [
{
"sourceVolume": "mongo-app",
"containerPath": "/data/db"
}
]
},
{
"name": "server",
"image": "node:8.11",
"memory": 128,
"portMappings": [
{
"hostPort": 80,
"containerPort": 8001
}
],
"links": [
"mongo-app"
],
"mountPoints":[
{
"sourceVolume": "some-api",
"containerPath": "/some-data"
}
]
}
]
}
And this is my Dockerfile:
FROM node:8.11
RUN mkdir -p /api
WORKDIR /api
COPY package.json /api
RUN cd /api && npm install
COPY . /api
EXPOSE 8001
CMD ["node", "api/app.js"]
Any Ideas why the application is crashing and does not deploy? It seems to me that the mongoDB is causing the problem but I cant understand or find the root of the problem.
Thank you in advance!

Answer 1

I spent a while trying to figure this out as well.
The solution: Add a mountpoint for "containerPath": "/data/configdb". Mongo expects to be able to write to both /data/db and /data/configdb.
Also, you might want to bump up "memory": 128 for Mongo to something higher.