Unable to authenticate Mongodb deployed in kubernetes - mongodb

Question

Hi I have deployed mongodb V-4.2.6 on kubernetes and the below is the yaml file.
# Service to expose MongoDB
apiVersion: v1
kind: Service
metadata:
name: mongo
namespace: namespace-name
labels:
app: mongo
spec:
ports:
- name: mongo
port: 27017
targetPort: 27017
clusterIP: None
selector:
app: mongo
tier: db
type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: mongo
namespace: namespace-name
labels:
tier: "db"
app: "mongo"
spec:
replicas: 1
selector:
matchLabels:
app: mongo
tier: "db"
template:
metadata:
labels:
app: mongo
tier: "db"
spec:
terminationGracePeriodSeconds: 10
containers:
- name: mongo
image: mongo:4.2.6
resources:
limits:
memory: "2Gi"
requests:
memory: "512Mi"
env:
- name: MONGO_INITDB_ROOT_USERNAME
value: "admin"
- name: MONGO_INITDB_ROOT_PASSWORD
value: "password"
- name: MONGO_INITDB_DATABASE
value: admin
command:
- mongod
- --auth
ports:
- containerPort: 27017
volumeMounts:
- name: nfs1
mountPath: /data/db
volumes:
- name: nfs1
nfs:
server: 0.0.0.0
path: "/path/to/volumes"
If I try to login with the credentials( db.auth("admin", "password") )specified in the above yaml file I'm getting authentication failed message in mongodb. I have found related issues in stackoverflow but couldn't find the solution for this. Can any one help me to create admin user from the yaml file.

Answer 1

Remove command from your deployment file and it'll work. Because when you set MONGO_INITDB_ROOT_USERNAME and MONGO_INITDB_ROOT_PASSWORD ENV variables at your manifest. Mongo container will enable --auth by itself. So, you don't need to specify explicitly. Take a look at here.
Updated YAML
env:
- name: MONGO_INITDB_ROOT_USERNAME
value: "admin"
- name: MONGO_INITDB_ROOT_PASSWORD
value: "password"
- name: MONGO_INITDB_DATABASE
value: admin
ports:
- containerPort: 27017