I am trying to connect to a MongoDB deployment from another deployment which is in the same namespace but when I attempt to do so I am getting an error :
kubectl exec -it mongodb-0 -- sh
mongo mongodb://admin:abc123@mongodb-headless-service.svc.cluster.local/platforms?authSource=admin MongoDB shell version v5.0.9 connecting to: mongodb://mongodb-headless-service.svc.cluster.local:27017/platforms?authSource=admin&compressors=disabled&gssapiServiceName=mongodb Error: couldn't connect to server mongodb-headless-service.svc.cluster.local:27017, connection attempt failed: HostNotFound: Could not find address for mongodb-headless-service.svc.cluster.local:27017: SocketException: Host not found (authoritative) : connect@src/mongo/shell/mongo.js:372:17 @(connect):2:6 exception: connect failed exiting with code 1
However when I test the connection in the original pod it authenticates successfully
kubectl exec -it mongodb-deployment-c896cf876-djhvl -- sh
mongo "mongodb://admin:abc123@localhost/platforms?authSource=admin"
MongoDB shell version v4.4.6
connecting to: mongodb://localhost:27017/platforms?authSource=admin&compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("23c1e0ce-3369-4449-8895-1a6791246b67") }
MongoDB server version: 4.4.6
---
....
....
I have tried specifying namespace but still I get same error :
mongo mongodb://admin:abc123@mongodb-headless-service.labs.svc.cluster.local/platforms?authSource=admin
I have checked with kubectl describe deploment whether bind-ip is specified (is this even necessary ?) and I observe its not configured.
When I specify bind-ips in the yml definition for the container as below :
apiVersion: apps/v1
kind: Deployment
metadata:
name: mongodb-deployment
namespace: labs
labels:
app: mongodb
spec:
replicas: 1
selector:
matchLabels:
app: mongodb
template:
metadata:
labels:
app: mongodb
spec:
containers:
- name: mongodb
image: docker.io/bitnami/mongodb:4.4.6-debian-10-r0
imagePullPolicy: "IfNotPresent"
command:
- "mongod"
- "--bind_ip"
- "0.0.0.0"
securityContext:
runAsNonRoot: true
runAsUser: 1001
ports:
- containerPort: 27017
env:
- name: MONGO_INITDB_ROOT_USERNAME
valueFrom:
secretKeyRef:
name: mongodb-secret-amended
key: mongo-root-username
- name: MONGO_INITDB_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mongodb-secret-amended
key: mongo-root-password
volumeMounts:
- mountPath: /data/db
name: mongodb-vol
volumes:
- name: mongodb-vol
persistentVolumeClaim:
claimName: mongodb-claim
---
apiVersion: v1
kind: Service
metadata:
name: mongodb-service
namespace: labs
spec:
type: NodePort
selector:
app: mongodb
ports:
- protocol: TCP
port: 27017
targetPort: 27017
---
apiVersion: v1
kind: Service
metadata:
name: mongodb-headless-service
namespace: labs
spec:
selector:
app: mongodb
ports:
- protocol: TCP
port: 27017
targetPort: 27017
I also get an error on container startup :
{"t":{"$date":"2022-06-12T10:23:14.337+00:00"},"s":"I", "c":"CONTROL", "id":23285, "ctx":"main","msg":"Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'"}
{"t":{"$date":"2022-06-12T10:23:14.339+00:00"},"s":"W", "c":"ASIO", "id":22601, "ctx":"main","msg":"No TransportLayer configured during NetworkInterface startup"}
{"t":{"$date":"2022-06-12T10:23:14.339+00:00"},"s":"I", "c":"NETWORK", "id":4648601, "ctx":"main","msg":"Implicit TCP FastOpen unavailable. If TCP FastOpen is required, set tcpFastOpenServer, tcpFastOpenClient, and tcpFastOpenQueueSize."}
{"t":{"$date":"2022-06-12T10:23:14.340+00:00"},"s":"I", "c":"STORAGE", "id":4615611, "ctx":"initandlisten","msg":"MongoDB starting","attr":{"pid":1,"port":27017,"dbPath":"/data/db","architecture":"64-bit","host":"mongodb-deployment-c896cf876-djhvl"}}
{"t":{"$date":"2022-06-12T10:23:14.340+00:00"},"s":"I", "c":"CONTROL", "id":23403, "ctx":"initandlisten","msg":"Build Info","attr":{"buildInfo":{"version":"4.4.6","gitVersion":"72e66213c2c3eab37d9358d5e78ad7f5c1d0d0d7","openSSLVersion":"OpenSSL 1.1.1d 10 Sep 2019","modules":[],"allocator":"tcmalloc","environment":{"distmod":"debian10","distarch":"x86_64","target_arch":"x86_64"}}}}
{"t":{"$date":"2022-06-12T10:23:14.340+00:00"},"s":"I", "c":"CONTROL", "id":51765, "ctx":"initandlisten","msg":"Operating System","attr":{"os":{"name":"PRETTY_NAME=\"Debian GNU/Linux 10 (buster)\"","version":"Kernel 5.8.0-43-generic"}}}
{"t":{"$date":"2022-06-12T10:23:14.340+00:00"},"s":"I", "c":"CONTROL", "id":21951, "ctx":"initandlisten","msg":"Options set by command line","attr":{"options":{"net":{"bindIp":"0.0.0.0"}}}}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"E", "c":"STORAGE", "id":20557, "ctx":"initandlisten","msg":"DBException in initAndListen, terminating","attr":{"error":"IllegalOperation: Attempted to create a lock file on a read-only directory: /data/db"}}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"REPL", "id":4784900, "ctx":"initandlisten","msg":"Stepping down the ReplicationCoordinator for shutdown","attr":{"waitTimeMillis":10000}}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"COMMAND", "id":4784901, "ctx":"initandlisten","msg":"Shutting down the MirrorMaestro"}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"SHARDING", "id":4784902, "ctx":"initandlisten","msg":"Shutting down the WaitForMajorityService"}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"NETWORK", "id":20562, "ctx":"initandlisten","msg":"Shutdown: going to close listening sockets"}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"NETWORK", "id":4784905, "ctx":"initandlisten","msg":"Shutting down the global connection pool"}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"STORAGE", "id":4784906, "ctx":"initandlisten","msg":"Shutting down the FlowControlTicketholder"}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"-", "id":20520, "ctx":"initandlisten","msg":"Stopping further Flow Control ticket acquisitions."}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"NETWORK", "id":4784918, "ctx":"initandlisten","msg":"Shutting down the ReplicaSetMonitor"}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"SHARDING", "id":4784921, "ctx":"initandlisten","msg":"Shutting down the MigrationUtilExecutor"}
{"t":{"$date":"2022-06-12T10:23:14.341+00:00"},"s":"I", "c":"CONTROL", "id":4784925, "ctx":"initandlisten","msg":"Shutting down free monitoring"}
{"t":{"$date":"2022-06-12T10:23:14.342+00:00"},"s":"I", "c":"STORAGE", "id":4784927, "ctx":"initandlisten","msg":"Shutting down the HealthLog"}
{"t":{"$date":"2022-06-12T10:23:14.342+00:00"},"s":"I", "c":"STORAGE", "id":4784929, "ctx":"initandlisten","msg":"Acquiring the global lock for shutdown"}
{"t":{"$date":"2022-06-12T10:23:14.342+00:00"},"s":"I", "c":"-", "id":4784931, "ctx":"initandlisten","msg":"Dropping the scope cache for shutdown"}
{"t":{"$date":"2022-06-12T10:23:14.342+00:00"},"s":"I", "c":"FTDC", "id":4784926, "ctx":"initandlisten","msg":"Shutting down full-time data capture"}
{"t":{"$date":"2022-06-12T10:23:14.342+00:00"},"s":"I", "c":"CONTROL", "id":20565, "ctx":"initandlisten","msg":"Now exiting"}
{"t":{"$date":"2022-06-12T10:23:14.342+00:00"},"s":"I", "c":"CONTROL", "id":23138, "ctx":"initandlisten","msg":"Shutting down","attr":{"exitCode":100}}
What am I missing ?