how to deploy mongodb on kubernetes1.20

  1. clone git repository

    git clone https://github.com/mongodb/mongodb-kubernetes-operator.git

  2. install mongodb

    kubectl apply -f config/crd/bases/mongodbcommunity.mongodb.com_mongodbcommunity.yaml
kubectl apply -k config/rbac/ --namespace chenshi
kubectl create -f config/manager/manager.yaml --namespace chenshi

    edit config/samples/mongodb.com_v1_mongodbcommunity_cr.yaml,replace version、security、password,this is mine:

    --
apiVersion: mongodbcommunity.mongodb.com/v1
kind: MongoDBCommunity
metadata:
  name: mongodb
spec:
  members: 1
  type: ReplicaSet
  version: "4.2.6"
  security:
    authentication:
      modes: ["SCRAM-SHA-1"]
  users:
    - name: admin
      db: admin
      passwordSecretRef: # a reference to the secret that will be used to generate the user's password
        name: my-user-password
      roles:
        - name: clusterAdmin
          db: admin
        - name: userAdminAnyDatabase
          db: admin
      scramCredentialsSecretName: my-scram
  additionalMongodConfig:
    storage.wiredTiger.engineConfig.journalCompressor: zlib

# the user credentials will be generated from this secret
# once the credentials are generated, this secret is no longer required
---
apiVersion: v1
kind: Secret
metadata:
  name: my-user-password
type: Opaque
stringData:
  password: chenshi.net

  3. create db and user

    use admin
db.auth("admin","chenshi.net")
use chenshi
db.createUser({user:"chenshi",pwd:"chenshi.net",roles:[{role:"readWrite",db:"chenshi"}],mechanisms:["SCRAM-SHA-1"]})

  4. backup and restore

    mongodump -u chenshi -p chenshi.net -d chenshi -o chenshi/
mongorestore -u chenshi -p chenshi.net -d chenshi chenshi/

references: