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New to KubeDB? Please start here.
Reconfigure MySQL TLS/SSL (Transport Encryption)
KubeDB supports reconfigure i.e. add, remove, update and rotation of TLS/SSL certificates for existing MySQL database via a MySQLOpsRequest. This tutorial will show you how to use KubeDB to reconfigure TLS/SSL encryption.
Before You Begin
At first, you need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. If you do not already have a cluster, you can create one by using kind.
Install
cert-mangerv1.0.0 or later to your cluster to manage your SSL/TLS certificates.Now, install KubeDB cli on your workstation and KubeDB operator in your cluster following the steps here.
To keep things isolated, this tutorial uses a separate namespace called
demothroughout this tutorial.$ kubectl create ns demo namespace/demo created
Note: YAML files used in this tutorial are stored in [docs/guides/mysql/reconfigure-tls/yamls](https://github.com/kubedb/docs/tree/v2024.1.26-rc.0/docs/guides/mysql folder in GitHub repository kubedb/docs.
Add TLS to a MySQL database
Here, We are going to create a MySQL database without TLS and then reconfigure the database to use TLS.
Deploy MySQL without TLS
In this section, we are going to deploy a MySQL database without TLS. In the next few sections we will reconfigure TLS using MySQLOpsRequest CRD. Below is the YAML of the MySQL CR that we are going to create,
apiVersion: kubedb.com/v1alpha2
kind: MySQL
metadata:
name: mysql
namespace: demo
spec:
version: "8.0.35"
topology:
mode: GroupReplication
storageType: Durable
storage:
storageClassName: "standard"
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
terminationPolicy: Delete
Let’s create the MySQL CR we have shown above,
$ kubectl create -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/group-replication.yaml
mysql.kubedb.com/mysql created
apiVersion: kubedb.com/v1alpha2
kind: MySQL
metadata:
name: mysql
namespace: demo
spec:
version: "8.0.31-innodb"
topology:
mode: InnoDBCluster
innoDBCluster:
router:
replicas: 1
storageType: Durable
storage:
storageClassName: "standard"
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
terminationPolicy: Delete
Let’s create the MySQL CR we have shown above,
$ kubectl create -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/innodb-cluster.yaml
mysql.kubedb.com/mysql created
apiVersion: kubedb.com/v1alpha2
kind: MySQL
metadata:
name: semi-sync-mysql
namespace: demo
spec:
version: "8.0.35"
replicas: 3
topology:
mode: SemiSync
semiSync:
sourceWaitForReplicaCount: 1
sourceTimeout: 23h
errantTransactionRecoveryPolicy: PseudoTransaction
storageType: Durable
storage:
storageClassName: "standard"
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
terminationPolicy: WipeOut
Let’s create the MySQL CR we have shown above,
$ kubectl create -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/semi-sync.yaml
mysql.kubedb.com/mysql created
apiVersion: kubedb.com/v1alpha2
kind: MySQL
metadata:
name: mysql
namespace: demo
spec:
version: "8.0.35"
storageType: Durable
storage:
storageClassName: "standard"
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
terminationPolicy: Delete
Let’s create the MySQL CR we have shown above,
$ kubectl create -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/standalone.yaml
mysql.kubedb.com/mysql created
Now, wait until mysql has status Ready. i.e,
$ kubectl get my -n demo
NAME VERSION STATUS AGE
mysql 8.0.35 Ready 75s
$ kubectl dba describe mysql mysql -n demo
Name: mysql
Namespace: demo
CreationTimestamp: Mon, 21 Nov 2022 16:18:44 +0600
Labels: <none>
Annotations: kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"kubedb.com/v1alpha2","kind":"MySQL","metadata":{"annotations":{},"name":"mysql","namespace":"demo"},"spec":{"storage":{"accessModes":["R...
Replicas: 1 total
Status: Ready
StorageType: Durable
Volume:
StorageClass: standard
Capacity: 1Gi
Access Modes: RWO
Paused: false
Halted: false
Termination Policy: WipeOut
StatefulSet:
Name: mysql
CreationTimestamp: Mon, 21 Nov 2022 16:18:49 +0600
Labels: app.kubernetes.io/component=database
app.kubernetes.io/instance=mysql
app.kubernetes.io/managed-by=kubedb.com
app.kubernetes.io/name=mysqls.kubedb.com
Annotations: <none>
Replicas: 824635546904 desired | 1 total
Pods Status: 1 Running / 0 Waiting / 0 Succeeded / 0 Failed
Service:
Name: mysql
Labels: app.kubernetes.io/component=database
app.kubernetes.io/instance=mysql
app.kubernetes.io/managed-by=kubedb.com
app.kubernetes.io/name=mysqls.kubedb.com
Annotations: <none>
Type: ClusterIP
IP: 10.96.238.135
Port: primary 3306/TCP
TargetPort: db/TCP
Endpoints: 10.244.0.23:3306
Service:
Name: mysql-pods
Labels: app.kubernetes.io/component=database
app.kubernetes.io/instance=mysql
app.kubernetes.io/managed-by=kubedb.com
app.kubernetes.io/name=mysqls.kubedb.com
Annotations: <none>
Type: ClusterIP
IP: None
Port: db 3306/TCP
TargetPort: db/TCP
Endpoints: 10.244.0.23:3306
Auth Secret:
Name: mysql-auth
Labels: app.kubernetes.io/component=database
app.kubernetes.io/instance=mysql
app.kubernetes.io/managed-by=kubedb.com
app.kubernetes.io/name=mysqls.kubedb.com
Annotations: <none>
Type: kubernetes.io/basic-auth
Data:
password: 16 bytes
username: 4 bytes
AppBinding:
Metadata:
Annotations:
kubectl.kubernetes.io/last-applied-configuration: {"apiVersion":"kubedb.com/v1alpha2","kind":"MySQL","metadata":{"annotations":{},"name":"mysql","namespace":"demo"},"spec":{"storage":{"accessModes":["ReadWriteOnce"],"resources":{"requests":{"storage":"1Gi"}},"storageClassName":"standard"},"storageType":"Durable","terminationPolicy":"WipeOut","version":"8.0.35"}}
Creation Timestamp: 2022-11-21T10:18:49Z
Labels:
app.kubernetes.io/component: database
app.kubernetes.io/instance: mysql
app.kubernetes.io/managed-by: kubedb.com
app.kubernetes.io/name: mysqls.kubedb.com
Name: mysql
Namespace: demo
Spec:
Client Config:
Service:
Name: mysql
Path: /
Port: 3306
Scheme: mysql
URL: tcp(mysql.demo.svc:3306)/
Parameters:
API Version: appcatalog.appscode.com/v1alpha1
Kind: StashAddon
Stash:
Addon:
Backup Task:
Name: mysql-backup-8.0.21
Params:
Name: args
Value: --all-databases --set-gtid-purged=OFF
Restore Task:
Name: mysql-restore-8.0.21
Secret:
Name: mysql-auth
Type: kubedb.com/mysql
Version: 8.0.35
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Phase Changed 1m KubeDB Operator phase changed from to Provisioning reason:
Normal Successful 1m KubeDB Operator Successfully created governing service
Normal Successful 1m KubeDB Operator Successfully created service for primary/standalone
Normal Successful 1m KubeDB Operator Successfully created StatefulSet
Normal Successful 1m KubeDB Operator Successfully created MySQL
Normal Successful 1m KubeDB Operator Successfully created appbinding
Normal Phase Changed 25s KubeDB Operator phase changed from Provisioning to Ready reason:
Now, we can connect to this database through mysql-shell and verify that the TLS is disabled.
$ kubectl get secrets -n demo mysql-auth -o jsonpath='{.data.\username}' | base64 -d
root
$ kubectl get secrets -n demo mysql-auth -o jsonpath='{.data.\password}' | base64 -d
f8EyKG)mNMIMdS~a
$ kubectl exec -it mysql-0 -n demo -- mysql -u root --password='f8EyKG)mNMIMdS~a' --host=mysql-0.mysql-pods.demo -e "show variables like '%require_secure_transport%';";
Defaulted container "mysql" out of: mysql, mysql-init (init)
mysql: [Warning] Using a password on the command line interface can be insecure.
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| require_secure_transport | OFF |
+--------------------------+-------+
kubectl exec -it mysql-0 -n demo -- mysql -u root --password='f8EyKG)mNMIMdS~a' --host=mysql-0.mysql-pods.demo -e "\s;";
Defaulted container "mysql" out of: mysql, mysql-init (init)
mysql: [Warning] Using a password on the command line interface can be insecure.
--------------
mysql Ver 8.0.35 for Linux on x86_64 (MySQL Community Server - GPL)
Connection id: 91
Current database:
Current user: [email protected]
SSL: Cipher in use is TLS_AES_256_GCM_SHA384
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 8.0.35 MySQL Community Server - GPL
Protocol version: 10
Connection: mysql-0.mysql-pods.demo via TCP/IP
Server characterset: utf8mb4
Db characterset: utf8mb4
Client characterset: latin1
Conn. characterset: latin1
TCP port: 3306
Binary data as: Hexadecimal
Uptime: 11 min 44 sec
Threads: 2 Questions: 454 Slow queries: 0 Opens: 185 Flush tables: 3 Open tables: 104 Queries per second avg: 0.644
We can verify from the above output that TLS is disabled for this database.
Create Issuer/ ClusterIssuer
Now, We are going to create an example Issuer that will be used to enable SSL/TLS in MySQL. Alternatively, you can follow this cert-manager tutorial to create your own Issuer.
- Start off by generating a ca certificates using openssl.
$ openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout ./ca.key -out ./ca.crt -subj "/CN=ca/O=kubedb"
Generating a RSA private key
................+++++
........................+++++
writing new private key to './ca.key'
-----
- Now we are going to create a ca-secret using the certificate files that we have just generated.
$ kubectl create secret tls my-ca \
--cert=ca.crt \
--key=ca.key \
--namespace=demo
secret/my-ca created
Now, Let’s create an Issuer using the my-ca secret that we have just created. The YAML file looks like this:
apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
name: my-issuer
namespace: demo
spec:
ca:
secretName: my-ca
Let’s apply the YAML file:
$ kubectl create -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/issuer.yaml
issuer.cert-manager.io/my-issuer created
Create MySQLOpsRequest
In order to add TLS to the database, we have to create a MySQLOpsRequest CRO with our created issuer. Below is the YAML of the MySQLOpsRequest CRO that we are going to create,
apiVersion: ops.kubedb.com/v1alpha1
kind: MySQLOpsRequest
metadata:
name: myops-add-tls
namespace: demo
spec:
type: ReconfigureTLS
databaseRef:
name: mysql
tls:
requireSSL: true
issuerRef:
name: my-issuer
kind: Issuer
apiGroup: "cert-manager.io"
certificates:
- alias: client
subject:
organizations:
- mysql
organizationalUnits:
- client
Here,
spec.databaseRef.namespecifies that we are performing reconfigure TLS operation onmysqldatabase.spec.typespecifies that we are performingReconfigureTLSon our database.spec.tls.issuerRefspecifies the issuer name, kind and api group.spec.tls.certificatesspecifies the certificates. You can learn more about this field from here.
Let’s create the MySQLOpsRequest CR we have shown above,
$ kubectl apply -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/myops-add-tls.yaml
mysqlopsrequest.ops.kubedb.com/myops-add-tls created
Verify TLS Enabled Successfully
Let’s wait for MySQLOpsRequest to be Successful. Run the following command to watch MySQLOpsRequest CRO,
$ kubectl get mysqlopsrequest -n demo
NAME TYPE STATUS AGE
myops-add-tls ReconfigureTLS Successful 91s
We can see from the above output that the MySQLOpsRequest has succeeded. If we describe the MySQLOpsRequest we will get an overview of the steps that were followed.
$ kubectl describe mysqlopsrequest -n demo myops-add-tls
Name: myops-add-tls
Namespace: demo
Labels: <none>
Annotations: <none>
API Version: ops.kubedb.com/v1alpha1
Kind: MySQLOpsRequest
Metadata:
Creation Timestamp: 2022-11-22T04:09:32Z
Generation: 1
Managed Fields:
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.:
f:kubectl.kubernetes.io/last-applied-configuration:
f:spec:
.:
f:apply:
f:databaseRef:
f:tls:
.:
f:certificates:
f:issuerRef:
f:type:
Manager: kubectl-client-side-apply
Operation: Update
Time: 2022-11-22T04:09:32Z
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:status:
.:
f:conditions:
f:observedGeneration:
f:phase:
Manager: kubedb-ops-manager
Operation: Update
Subresource: status
Time: 2022-11-22T04:09:34Z
Resource Version: 715635
UID: 0bae4203-991b-4377-b38b-981648855638
Spec:
Apply: IfReady
Database Ref:
Name: mysql
Tls:
Certificates:
Alias: client
Subject:
Organizational Units:
client
Organizations:
mysql
Issuer Ref:
API Group: cert-manager.io
Kind: Issuer
Name: my-issuer
Type: ReconfigureTLS
Status:
Conditions:
Last Transition Time: 2022-11-22T04:09:34Z
Message: Controller has started to Progress the MySQLOpsRequest: demo/myops-add-tls
Observed Generation: 1
Reason: OpsRequestProgressingStarted
Status: True
Type: Progressing
Last Transition Time: 2022-11-22T04:09:42Z
Message: Successfully synced all certificates
Observed Generation: 1
Reason: ReconfigureTLS
Status: True
Type: CertificateSynced
Last Transition Time: 2022-11-22T04:10:07Z
Message: Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-add-tls
Observed Generation: 1
Reason: SuccessfullyRestartedStatefulSet
Status: True
Type: RestartStatefulSet
Last Transition Time: 2022-11-22T04:10:16Z
Message: Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-add-tls
Observed Generation: 1
Reason: SuccessfullyReconfiguredTLS
Status: True
Type: DBReady
Last Transition Time: 2022-11-22T04:10:21Z
Message: Controller has successfully reconfigure the MySQL demo/myops-add-tls
Observed Generation: 1
Reason: OpsRequestProcessedSuccessfully
Status: True
Type: Successful
Observed Generation: 1
Phase: Successful
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Starting 16m KubeDB Enterprise Operator Start processing for MySQLOpsRequest: demo/myops-add-tls
Normal Starting 16m KubeDB Enterprise Operator Pausing MySQL databse: demo/mysql
Normal Successful 16m KubeDB Enterprise Operator Successfully paused MySQL database: demo/mysql for MySQLOpsRequest: myops-add-tls
Normal Successful 16m KubeDB Enterprise Operator Successfully synced all certificates
Normal Starting 16m KubeDB Enterprise Operator Restarting Pod: demo/mysql-0
Normal Successful 16m KubeDB Enterprise Operator Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-add-tls
Normal Successful 16m KubeDB Enterprise Operator Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-add-tls
Normal Starting 16m KubeDB Enterprise Operator Resuming MySQL database: demo/mysql
Normal Successful 16m KubeDB Enterprise Operator Successfully resumed MySQL database: demo/mysql
Normal Successful 16m KubeDB Enterprise Operator Controller has Successfully Reconfigured TLS
All tls-secret are created by KubeDB ops-manager operator. Default tls-secret name formed as {mysql-object-name}-{cert-alias}-cert. NAME TYPE DATA AGE my-ca kubernetes.io/tls 2 22m mysql-auth kubernetes.io/basic-auth 2 22m mysql-client-cert kubernetes.io/tls 3 18m mysql-metrics-exporter-cert kubernetes.io/tls 3 18m mysql-server-cert kubernetes.io/tls 3 18m
Now, Let’s exec into a database primary node and connect to the mysql-shell,
bash-4.4# ls /etc/mysql/certs
ca.crt client.crt client.key server.crt server.key
bash-4.4#
bash-4.4#
bash-4.4# openssl x509 -in /etc/mysql/certs/client.crt -inform PEM -subject -nameopt RFC2253 -noout
subject=CN=root,OU=client,O=mysql
bash-4.4#
bash-4.4#
bash-4.4#
bash-4.4# mysql -uroot -p$MYSQL_ROOT_PASSWORD -h mysql.demo.svc --ssl-ca=/etc/mysql/certs/ca.crt --ssl-cert=/etc/mysql/certs/client.crt --ssl-key=/etc/mysql/certs/client.key
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 94
Server version: 8.0.35 MySQL Community Server - GPL
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> \s
--------------
mysql Ver 8.0.35 for Linux on x86_64 (MySQL Community Server - GPL)
Connection id: 94
Current database:
Current user: [email protected]
SSL: Cipher in use is TLS_AES_256_GCM_SHA384
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 8.0.35 MySQL Community Server - GPL
Protocol version: 10
Connection: mysql.demo.svc via TCP/IP
Server characterset: utf8mb4
Db characterset: utf8mb4
Client characterset: latin1
Conn. characterset: latin1
TCP port: 3306
Binary data as: Hexadecimal
Uptime: 13 min 42 sec
Threads: 2 Questions: 522 Slow queries: 0 Opens: 167 Flush tables: 3 Open tables: 86 Queries per second avg: 0.635
--------------
mysql> show variables like '%require_secure_transport%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| require_secure_transport | ON |
+--------------------------+-------+
1 row in set (0.00 sec)
Rotate Certificate
Now we are going to rotate the certificate of this database. First let’s check the current expiration date of the certificate.
$ kubectl exec -it mysql-0 -n demo -- bash
bash-4.4# openssl x509 -in /etc/mysql/certs/client.crt -inform PEM -enddate -nameopt RFC2253 -noout
notAfter=Feb 20 04:09:37 2023 GM
So, the certificate will expire on this time Feb 20 04:09:37 2023 GMT.
Create MySQLRequest
Now we are going to increase it using a MysqlOpsRequest. Below is the yaml of the ops request that we are going to create,
apiVersion: ops.kubedb.com/v1alpha1
kind: MySQLOpsRequest
metadata:
name: myops-rotate
namespace: demo
spec:
type: ReconfigureTLS
databaseRef:
name: mysql
tls:
rotateCertificates: true
Here,
spec.databaseRef.namespecifies that we are performing reconfigure TLS operation onmysqldatabase.spec.typespecifies that we are performingReconfigureTLSon our database.spec.tls.rotateCertificatesspecifies that we want to rotate the certificate of this database.
Let’s create the MySQLOpsRequest CR we have shown above,
$ kubectl apply -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/myops-rotate.yaml
mysqlopsrequest.ops.kubedb.com/myops-rotate created
Verify Certificate Rotated Successfully
Let’s wait for MySQLOpsRequest to be Successful. Run the following command to watch MySQLOpsRequest CRO,
$ kubectl get mysqlopsrequest -n demo
Every 2.0s: kubectl get mysqlopsrequest -n demo
NAME TYPE STATUS AGE
myops-rotate ReconfigureTLS Successful 112s
We can see from the above output that the MysqlOpsRequest has succeeded. If we describe the MysqlOpsRequest we will get an overview of the steps that were followed.
$ kubectl describe mysqlopsrequest -n demo myops-rotate
Name: myops-rotate
Namespace: demo
Labels: <none>
Annotations: <none>
API Version: ops.kubedb.com/v1alpha1
Kind: MySQLOpsRequest
Metadata:
Creation Timestamp: 2022-11-22T04:39:37Z
Generation: 1
Managed Fields:
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.:
f:kubectl.kubernetes.io/last-applied-configuration:
f:spec:
.:
f:apply:
f:databaseRef:
f:tls:
.:
f:rotateCertificates:
f:type:
Manager: kubectl-client-side-apply
Operation: Update
Time: 2022-11-22T04:39:37Z
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:status:
.:
f:conditions:
f:observedGeneration:
f:phase:
Manager: kubedb-ops-manager
Operation: Update
Subresource: status
Time: 2022-11-22T04:39:38Z
Resource Version: 718328
UID: 89798e59-9868-46b9-a11e-d87ad4e9bd9f
Spec:
Apply: IfReady
Database Ref:
Name: mysql
Tls:
Rotate Certificates: true
Type: ReconfigureTLS
Status:
Conditions:
Last Transition Time: 2022-11-22T04:39:38Z
Message: Controller has started to Progress the MySQLOpsRequest: demo/myops-rotate
Observed Generation: 1
Reason: OpsRequestProgressingStarted
Status: True
Type: Progressing
Last Transition Time: 2022-11-22T04:39:45Z
Message: Successfully synced all certificates
Observed Generation: 1
Reason: ReconfigureTLS
Status: True
Type: CertificateSynced
Last Transition Time: 2022-11-22T04:39:54Z
Message: Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-rotate
Observed Generation: 1
Reason: SuccessfullyRestartedStatefulSet
Status: True
Type: RestartStatefulSet
Last Transition Time: 2022-11-22T04:40:08Z
Message: Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-rotate
Observed Generation: 1
Reason: SuccessfullyReconfiguredTLS
Status: True
Type: DBReady
Last Transition Time: 2022-11-22T04:40:13Z
Message: Controller has successfully reconfigure the MySQL demo/myops-rotate
Observed Generation: 1
Reason: OpsRequestProcessedSuccessfully
Status: True
Type: Successful
Observed Generation: 1
Phase: Successful
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Starting 52s KubeDB Enterprise Operator Start processing for MySQLOpsRequest: demo/myops-rotate
Normal Starting 52s KubeDB Enterprise Operator Pausing MySQL databse: demo/mysql
Normal Successful 52s KubeDB Enterprise Operator Successfully paused MySQL database: demo/mysql for MySQLOpsRequest: myops-rotate
Normal Successful 45s KubeDB Enterprise Operator Successfully synced all certificates
Normal Starting 36s KubeDB Enterprise Operator Restarting Pod: demo/mysql-0
Normal Successful 36s KubeDB Enterprise Operator Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-rotate
Normal Successful 22s KubeDB Enterprise Operator Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-rotate
Normal Starting 17s KubeDB Enterprise Operator Resuming MySQL database: demo/mysql
Normal Successful 17s KubeDB Enterprise Operator Successfully resumed MySQL database: demo/mysql
Normal Successful 17s KubeDB Enterprise Operator Controller has Successfully Reconfigured TLS
Now, let’s check the expiration date of the certificate.
$ kubectl exec -it mysql-0 -n demo bash
openssl x509 -in /etc/mysql/certs/client.crt -inform PEM -enddate -nameopt RFC2253 -noout
notAfter=Feb 20 04:40:08 2023 GMT
As we can see from the above output, the certificate has been rotated successfully.
Change Issuer/ClusterIssuer
Now, we are going to change the issuer of this database.
- Let’s create a new ca certificate and key using a different subject
CN=ca-update,O=kubedb-updated.
$ openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout ./ca.key -out ./ca.crt -subj "/CN=ca-updated/O=kubedb-updated"
Generating a RSA private key
..............................................................+++++
......................................................................................+++++
writing new private key to './ca.key'
-----
- Now we are going to create a new ca-secret using the certificate files that we have just generated.
$ kubectl create secret tls mysql-new-ca \
--cert=ca.crt \
--key=ca.key \
--namespace=demo
secret/mysql-new-ca created
Now, Let’s create a new Issuer using the mysql-new-ca secret that we have just created. The YAML file looks like this:
apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
name: my-new-issuer
namespace: demo
spec:
ca:
secretName: mysql-new-ca
Let’s apply the YAML file:
$ kubectl create -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/new-issuer.yaml
issuer.cert-manager.io/my-new-issuer created
Create MySQLOpsRequest
In order to use the new issuer to issue new certificates, we have to create a MySQLOpsRequest CRO with the newly created issuer. Below is the YAML of the MySQLOpsRequest CRO that we are going to create,
apiVersion: ops.kubedb.com/v1alpha1
kind: MySQLOpsRequest
metadata:
name: myops-change-issuer
namespace: demo
spec:
type: ReconfigureTLS
databaseRef:
name: mysql
tls:
issuerRef:
name: my-new-issuer
kind: Issuer
apiGroup: "cert-manager.io"
Here,
spec.databaseRef.namespecifies that we are performing reconfigure TLS operation onmysqldatabase.spec.typespecifies that we are performingReconfigureTLSon our database.spec.tls.issuerRefspecifies the issuer name, kind and api group.
Let’s create the MysqlOpsRequest CR we have shown above,
$ kubectl apply -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/myops-change-issuer.yaml
mysqlopsrequest.ops.kubedb.com/mops-change-issuer created
Verify Issuer is changed successfully
Let’s wait for MySQLOpsRequest to be Successful. Run the following command to watch MySQLOpsRequest CRO,
$ kubectl get mysqlopsrequest -n demo
Every 2.0s: kubectl get mongodbopsrequest -n demo
NAME TYPE STATUS AGE
myops-change-issuer ReconfigureTLS Successful 87s
We can see from the above output that the MysqlOpsRequest has succeeded. If we describe the MySQLOpsRequest we will get an overview of the steps that were followed.
$ kubectl describe mysqlopsrequest -n demo myops-change-issuer
Name: myops-change-issuer
Namespace: demo
Labels: <none>
Annotations: <none>
API Version: ops.kubedb.com/v1alpha1
Kind: MySQLOpsRequest
Metadata:
Creation Timestamp: 2022-11-22T04:56:51Z
Generation: 1
Managed Fields:
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.:
f:kubectl.kubernetes.io/last-applied-configuration:
f:spec:
.:
f:apply:
f:databaseRef:
f:tls:
.:
f:issuerRef:
f:type:
Manager: kubectl-client-side-apply
Operation: Update
Time: 2022-11-22T04:56:51Z
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:status:
.:
f:conditions:
f:observedGeneration:
f:phase:
Manager: kubedb-ops-manager
Operation: Update
Subresource: status
Time: 2022-11-22T04:56:51Z
Resource Version: 719824
UID: bcc96807-7efb-45e9-add8-54f858ed18d4
Spec:
Apply: IfReady
Database Ref:
Name: mysql
Tls:
Issuer Ref:
API Group: cert-manager.io
Kind: Issuer
Name: my-new-issuer
Type: ReconfigureTLS
Status:
Conditions:
Last Transition Time: 2022-11-22T04:56:51Z
Message: Controller has started to Progress the MySQLOpsRequest: demo/myops-change-issuer
Observed Generation: 1
Reason: OpsRequestProgressingStarted
Status: True
Type: Progressing
Last Transition Time: 2022-11-22T04:56:57Z
Message: Successfully synced all certificates
Observed Generation: 1
Reason: ReconfigureTLS
Status: True
Type: CertificateSynced
Last Transition Time: 2022-11-22T04:57:06Z
Message: Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-change-issuer
Observed Generation: 1
Reason: SuccessfullyRestartedStatefulSet
Status: True
Type: RestartStatefulSet
Last Transition Time: 2022-11-22T04:57:15Z
Message: Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-change-issuer
Observed Generation: 1
Reason: SuccessfullyReconfiguredTLS
Status: True
Type: DBReady
Last Transition Time: 2022-11-22T04:57:19Z
Message: Controller has successfully reconfigure the MySQL demo/myops-change-issuer
Observed Generation: 1
Reason: OpsRequestProcessedSuccessfully
Status: True
Type: Successful
Observed Generation: 1
Phase: Successful
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Starting 2m16s KubeDB Enterprise Operator Start processing for MySQLOpsRequest: demo/myops-change-issuer
Normal Starting 2m16s KubeDB Enterprise Operator Pausing MySQL databse: demo/mysql
Normal Successful 2m16s KubeDB Enterprise Operator Successfully paused MySQL database: demo/mysql for MySQLOpsRequest: myops-change-issuer
Normal Successful 2m10s KubeDB Enterprise Operator Successfully synced all certificates
Normal Starting 2m1s KubeDB Enterprise Operator Restarting Pod: demo/mysql-0
Normal Successful 2m1s KubeDB Enterprise Operator Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-change-issuer
Normal Successful 112s KubeDB Enterprise Operator Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-change-issuer
Normal Starting 108s KubeDB Enterprise Operator Resuming MySQL database: demo/mysql
Normal Successful 108s KubeDB Enterprise Operator Successfully resumed MySQL database: demo/mysql
Normal Successful 108s KubeDB Enterprise Operator Controller has Successfully Reconfigured TLS
Now, Let’s exec into a database node and find out the ca subject to see if it matches the one we have provided.
$ `kubectl exec -it mysql-0 -n demo -- bash`
root@mgo-rs-tls-2:/$ openssl x509 -in /etc/mysql/certs/ca.crt -inform PEM -subject -nameopt RFC2253 -noout
subject=O=kubedb-updated,CN=ca-updated
We can see from the above output that, the subject name matches the subject name of the new ca certificate that we have created. So, the issuer is changed successfully.
Remove TLS from the Database
Now, we are going to remove TLS from this database using a MySQLOpsRequest.
Create MySQLOpsRequest
Below is the YAML of the MySQLOpsRequest CRO that we are going to create,
apiVersion: ops.kubedb.com/v1alpha1
kind: MySQLOpsRequest
metadata:
name: myops-remove
namespace: demo
spec:
type: ReconfigureTLS
databaseRef:
name: mysql
tls:
remove: true
Here,
spec.databaseRef.namespecifies that we are performing reconfigure TLS operation onmysqldatabase.spec.typespecifies that we are performingReconfigureTLSon our database.spec.tls.removespecifies that we want to remove tls from this database.
Let’s create the mysqlOpsRequest CR we have shown above,
$ kubectl apply -f https://github.com/kubedb/docs/raw/v2024.1.26-rc.0/docs/guides/mysql/reconfigure-tls/reconfigure/yamls/myops-remove.yaml
mysqlopsrequest.ops.kubedb.com/mops-remove created
Verify TLS Removed Successfully
Let’s wait for MySQLOpsRequest to be Successful. Run the following command to watch MySQLOpsRequest CRO,
$ kubectl get mysqlopsrequest -n demo
Every 2.0s: kubectl get mysql opsrequest -n demo
NAME TYPE STATUS AGE
myops-remove ReconfigureTLS Successful 105s
We can see from the above output that the MySQLOpsRequest has succeeded. If we describe the MySQLOpsRequest we will get an overview of the steps that were followed.
$ kubectl describe mysqlopsrequest -n demo myops-remove
Name: myops-remove
Namespace: demo
Labels: <none>
Annotations: <none>
API Version: ops.kubedb.com/v1alpha1
Kind: MySQLOpsRequest
Metadata:
Creation Timestamp: 2022-11-22T05:02:52Z
Generation: 1
Managed Fields:
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.:
f:kubectl.kubernetes.io/last-applied-configuration:
f:spec:
.:
f:apply:
f:databaseRef:
f:tls:
.:
f:remove:
f:type:
Manager: kubectl-client-side-apply
Operation: Update
Time: 2022-11-22T05:02:52Z
API Version: ops.kubedb.com/v1alpha1
Fields Type: FieldsV1
fieldsV1:
f:status:
.:
f:conditions:
f:observedGeneration:
f:phase:
Manager: kubedb-ops-manager
Operation: Update
Subresource: status
Time: 2022-11-22T05:02:52Z
Resource Version: 720411
UID: 43adad9c-e9f6-4cd9-a19e-6ba848901c0c
Spec:
Apply: IfReady
Database Ref:
Name: mysql
Tls:
Remove: true
Type: ReconfigureTLS
Status:
Conditions:
Last Transition Time: 2022-11-22T05:02:52Z
Message: Controller has started to Progress the MySQLOpsRequest: demo/myops-remove
Observed Generation: 1
Reason: OpsRequestProgressingStarted
Status: True
Type: Progressing
Last Transition Time: 2022-11-22T05:03:08Z
Message: Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-remove
Observed Generation: 1
Reason: SuccessfullyRestartedStatefulSet
Status: True
Type: RestartStatefulSet
Last Transition Time: 2022-11-22T05:03:18Z
Message: Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-remove
Observed Generation: 1
Reason: SuccessfullyReconfiguredTLS
Status: True
Type: DBReady
Last Transition Time: 2022-11-22T05:03:27Z
Message: Controller has successfully reconfigure the MySQL demo/myops-remove
Observed Generation: 1
Reason: OpsRequestProcessedSuccessfully
Status: True
Type: Successful
Observed Generation: 1
Phase: Successful
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Starting 90s KubeDB Enterprise Operator Start processing for MySQLOpsRequest: demo/myops-remove
Normal Starting 90s KubeDB Enterprise Operator Pausing MySQL databse: demo/mysql
Normal Successful 90s KubeDB Enterprise Operator Successfully paused MySQL database: demo/mysql for MySQLOpsRequest: myops-remove
Normal Starting 74s KubeDB Enterprise Operator Restarting Pod: demo/mysql-0
Normal Successful 74s KubeDB Enterprise Operator Successfully restarted MySQL pods for MySQLDBOpsRequest: demo/myops-remove
Normal Successful 64s KubeDB Enterprise Operator Successfully reconfigured MySQL TLS for MySQLOpsRequest: demo/myops-remove
Normal Starting 55s KubeDB Enterprise Operator Resuming MySQL database: demo/mysql
Normal Successful 55s KubeDB Enterprise Operator Successfully resumed MySQL database: demo/mysql
Normal Successful 55s KubeDB Enterprise Operator Controller has Successfully Reconfigured TLS
Now, Let’s exec into the database primary node and find out that TLS is disabled or not.
$ kubectl exec -it -n demo mysql-0 -- mysql -u root -p 'f8EyKG)mNMIMdS~a'
mysql> show variables like '%require_secure_transport%';
+--------------------------+-------+
| Variable_name | Value |
+--------------------------+-------+
| require_secure_transport | OFF |
+--------------------------+-------+
So, we can see from the above that, output that tls is disabled successfully.
Cleaning up
To cleanup the Kubernetes resources created by this tutorial, run:
kubectl delete mysql -n demo mysql
kubectl delete issuer -n demo my-issuer my-new-issuer
kubectl delete mysqlopsrequest myops-add-tls myops-remove mops-rotate myps-change-issuer
kubectl delete ns demo
Next Steps
- Quickstart MySQL with KubeDB Operator.
- Initialize MySQL with Script.
- Monitor your MySQL database with KubeDB using out-of-the-box Prometheus operator.
- Monitor your MySQL database with KubeDB using out-of-the-box builtin-Prometheus.
- Use private Docker registry to deploy MySQL with KubeDB.
- Use kubedb cli to manage databases like kubectl for Kubernetes.
- Detail concepts of MySQL object.
- Want to hack on KubeDB? Check our contribution guidelines.