当然你必须提供MySQL Host。你可以这样做k8s DNS
在服务中进行设置。
MySQL Router 是一个中间件,可在您的应用程序和任何后端 MySQL 服务器之间提供透明路由。它可用于各种用例,例如通过有效地将数据库流量路由到适当的后端 MySQL 服务器来提供高可用性和可扩展性。
Examples
对于下面的例子我使用dynamic volume provisioning
对于数据使用openebs-hostpath
并使用StatefulSet
对于 MySQL 服务器。
部署
MySQL 路由器:
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql-router
namespace: mysql-router
spec:
replicas: 1
selector:
matchLabels:
app: mysql-router
template:
metadata:
labels:
app: mysql-router
version: v1
spec:
containers:
- name: mysql-router
image: mysql/mysql-router
env:
- name: MYSQL_HOST
value: "mariadb-galera.galera-cluster"
- name: MYSQL_PORT
value: "3306"
- name: MYSQL_USER
value: "root"
- name: MYSQL_PASSWORD
value: "root@123"
imagePullPolicy: Always
ports:
- containerPort: 3306
MySQL服务器
apiVersion: apps/v1
kind: StatefulSet
metadata:
namespace: galera-cluster
name: mariadb-galera
spec:
podManagementPolicy: OrderedReady
replicas: 1
selector:
matchLabels:
app: mariadb-galera
serviceName: mariadb-galera
template:
metadata:
labels:
app: mariadb-galera
spec:
restartPolicy: Always
securityContext:
fsGroup: 1001
runAsUser: 1001
containers:
- command:
- bash
- -ec
- |
# Bootstrap from the indicated node
NODE_ID="${MY_POD_NAME#"mariadb-galera-"}"
if [[ "$NODE_ID" -eq "0" ]]; then
export MARIADB_GALERA_CLUSTER_BOOTSTRAP=yes
export MARIADB_GALERA_FORCE_SAFETOBOOTSTRAP=no
fi
exec /opt/bitnami/scripts/mariadb-galera/entrypoint.sh /opt/bitnami/scripts/mariadb-galera/run.sh
env:
- name: MY_POD_NAME
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.name
- name: BITNAMI_DEBUG
value: "false"
- name: MARIADB_GALERA_CLUSTER_NAME
value: galera
- name: MARIADB_GALERA_CLUSTER_ADDRESS
value: gcomm://mariadb-galera.galera-cluster
- name: MARIADB_ROOT_PASSWORD
value: root@123
- name: MARIADB_DATABASE
value: my_database
- name: MARIADB_GALERA_MARIABACKUP_USER
value: mariabackup
- name: MARIADB_GALERA_MARIABACKUP_PASSWORD
value: root@123
- name: MARIADB_ENABLE_LDAP
value: "no"
- name: MARIADB_ENABLE_TLS
value: "no"
image: docker.io/bitnami/mariadb-galera:10.4.13-debian-10-r23
imagePullPolicy: IfNotPresent
livenessProbe:
exec:
command:
- bash
- -ec
- |
exec mysqladmin status -uroot -p$MARIADB_ROOT_PASSWORD
failureThreshold: 3
initialDelaySeconds: 120
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
name: mariadb-galera
ports:
- containerPort: 3306
name: mysql
protocol: TCP
- containerPort: 4567
name: galera
protocol: TCP
- containerPort: 4568
name: ist
protocol: TCP
- containerPort: 4444
name: sst
protocol: TCP
readinessProbe:
exec:
command:
- bash
- -ec
- |
exec mysqladmin status -uroot -p$MARIADB_ROOT_PASSWORD
failureThreshold: 3
initialDelaySeconds: 30
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
volumeMounts:
- mountPath: /opt/bitnami/mariadb/.bootstrap
name: previous-boot
- mountPath: /bitnami/mariadb
name: data
- mountPath: /opt/bitnami/mariadb/conf
name: mariadb-galera-config
volumes:
- emptyDir: {}
name: previous-boot
- configMap:
defaultMode: 420
name: my.cnf
name: mariadb-galera-config
volumeClaimTemplates:
- apiVersion: v1
metadata:
name: data
spec:
storageClassName: openebs-hostpath
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 20Gi
Services
MySQL 路由器服务
apiVersion: v1
kind: Service
metadata:
name: mysql-router-service
namespace: mysql-router
labels:
app: mysql-router
spec:
selector:
app: mysql-router
ports:
- protocol: TCP
port: 3306
type: LoadBalancer
loadBalancerIP: 192.168.123.123
MySQL服务
apiVersion: v1
kind: Service
metadata:
namespace: galera-cluster
name: mariadb-galera
labels:
app: mariadb-galera
spec:
type: ClusterIP
ports:
- name: mysql
port: 3306
selector:
app: mariadb-galera
---
apiVersion: v1
kind: Service
metadata:
namespace: galera-cluster
name: mariadb-galera-headless
labels:
app: mariadb-galera
spec:
type: ClusterIP
ports:
- name: galera
port: 4567
- name: ist
port: 4568
- name: sst
port: 4444
selector:
app: mariadb-galera