How to make connection with Google Cloud SQL using Google Container Engine? - mysql

Question

i am using Node JS and deployed it using Kubernetes in Google Container Engine. but I cant make a connection to MySQL.
this is my node JS connection
var pool = mysql.createPool({
connectionLimit : 100,
user : process.env.DB_USER,
password : process.env.DB_PASSWORD,
database : process.env.DB_NAME,
multipleStatements : true,
socketPath : '/cloudsql/' + process.env.INSTANCE_CONNECTION_NAME
})
I was using this for my Google App Engine and its work. now i need to move to GKE and it sent an error that said mySQL is not defined.
this is my app-frontend.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: app-frontend
labels:
app: app
spec:
replicas: 1
template:
metadata:
labels:
app: app
tier: frontend
spec:
containers:
- name: app
image: gcr.io/app-12345/app:1.0
env :
- name : DB_HOST
value : 127.0.0.1:3306
- name : DB_USER
valueFrom:
secretKeyRef:
name: cloudsql-db-credentials
key: username
- name : DB_PASSWORD
valueFrom:
secretKeyRef:
name: cloudsql-db-credentials
key: password
ports:
- name: http-server
containerPort: 8080
imagePullPolicy: Always
- image: gcr.io/cloudsql-docker/gce-proxy:1.09
name: cloudsql-proxy
imagePullPolicy: Always
command:
- /cloud_sql_proxy
- --dir=/cloudsql
- --instances=mulung=tcp:3306
- --credential_file=/secrets/cloudsql/credentials.json
volumeMounts:
- name: cloudsql-instance-credentials
mountPath: /secrets/cloudsql
readOnly: true
- name: ssl-certs
mountPath: /etc/ssl/certs
- name: cloudsql
mountPath: /cloudsql
# [END proxy_container]
ports:
- name: portdb
containerPort: 3306
# [START volumes]
volumes:
- name: cloudsql-instance-credentials
secret:
secretName: cloudsql-instance-credentials
- name: ssl-certs
hostPath:
path: /etc/ssl/certs
- name: cloudsql
emptyDir:
what should i do to fix it? thank you guys.

Answer 1

Can you check the command part
command: ["/cloud_sql_proxy", "--dir=/cloudsql",
"-instances=CLOUD_SQL_INSTANCE_NAME",
"-credential_file=/secrets/cloudsql/credentials.json"]
Here is the working deployment.yaml from one of my backend application
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: <appname>
spec:
replicas: 2
template:
metadata:
labels:
app: <appname>
spec:
containers:
- image: gcr.io/<some_name>/cloudsql-docker/gce-proxy:1.05
name: cloudsql-proxy
command: ["/cloud_sql_proxy", "--dir=/cloudsql",
"-instances=CLOUD_SQL_INSTANCE_NAME",
"-credential_file=/secrets/cloudsql/credentials.json"]
volumeMounts:
- name: cloudsql-oauth-credentials
mountPath: /secrets/cloudsql
readOnly: true
- name: ssl-certs
mountPath: /etc/ssl/certs
- name: cloudsql
mountPath: /cloudsql
- name: <appname>
image: IMAGE_NAME
ports:
- containerPort: 8888
readinessProbe:
httpGet:
path: /<appname>/health
port: 8888
initialDelaySeconds: 30
periodSeconds: 30
timeoutSeconds: 30
successThreshold: 1
failureThreshold: 5
env:
- name: PROJECT_NAME
value: <some_name>
- name: PROJECT_ZONE
value: <some_name>
- name: INSTANCE_NAME
value: <some_name>
- name: INSTANCE_PORT
value: <some_name>
- name: CONTEXT_PATH
value: <appname>
volumeMounts:
- name: application-config
mountPath: /opt/config-mount
volumes:
- name: cloudsql-oauth-credentials
secret:
secretName: cloudsql-oauth-credentials
- name: ssl-certs
hostPath:
path: /etc/ssl/certs
- name: cloudsql
emptyDir:
- name: application-config
secret:
secretName: <appname>-ENV_NAME-config