Can't login mysql server deployed in k8s cluster - mysql

Question

I am using k8s in mac-docker-desktop. I deploy a mysql pod with below config.
run with: kubectl apply -f mysql.yaml
# secret
apiVersion: v1
kind: Secret
metadata:
name: mysql
type: Opaque
data:
# root
mysql-root-password: cm9vdAo=
---
# configMap
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql-conf
data:
database: app
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql
labels:
app: mysql
spec:
selector:
matchLabels:
app: mysql
strategy:
type: RollingUpdate
template:
metadata:
labels:
app: mysql
spec:
volumes:
- name: mysql
persistentVolumeClaim:
claimName: mysql
containers:
- image: mysql:5.6
name: mysql
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql
key: mysql-root-password
- name: MYSQL_DATABASE
valueFrom:
configMapKeyRef:
name: mysql-conf
key: database
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql
mountPath: /var/lib/mysql
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql
labels:
app: mysql
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
---
# services
apiVersion: v1
kind: Service
metadata:
name: mysql
labels:
app: mysql
spec:
selector:
app: mysql
ports:
- port: 3306
targetPort: 3306
After that. it shows ok . and then, I want to connect the mysql server with node ip, but failed. then I exec in the pod, and got failed either.
I execute in the pod and can't login.
☁ gogs-k8s kubectl get pods
NAME READY STATUS RESTARTS AGE
blog-59fb8cbd44-frmtx 1/1 Running 0 37m
blog-59fb8cbd44-gdskp 1/1 Running 0 37m
blog-59fb8cbd44-qrs8f 1/1 Running 0 37m
mysql-6c794ccb7b-dz9f4 1/1 Running 0 31s
☁ gogs-k8s kubectl exec mysql-6c794ccb7b-dz9f4 -it bash
root#mysql-6c794ccb7b-dz9f4:/# ls
bin boot dev docker-entrypoint-initdb.d entrypoint.sh etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
root#mysql-6c794ccb7b-dz9f4:/# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'#'localhost' (using password: YES)
root#mysql-6c794ccb7b-dz9f4:/# echo $MYSQL_ROOT_PASSWORD
root
root#mysql-6c794ccb7b-dz9f4:/# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'#'localhost' (using password: YES)
It there any problems with my config file ?

Answer 1

Probably you have invalid base64 encoded password. Try this one:
data:
pass: cm9vdA==

Answer 2

As #Vasily Angapov pointed out, your base64 encoding is wrong.
When you do the following you are encoding the base for root\n
echo "root" | base64
Output:
cm9vdAo=
If you want to remove the newline character you should use the option -n:
echo -n "root" | base64
Output:
cm9vdA==
Even better is to do the following:
echo -n "root" | base64 -w 0
That way base64 will not insert new lines in longer outputs.
Also you can verify if your encoding is right by decoding the encoded text:
echo "cm9vdA==" | base64 --decode
The output should not create a new line.