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使用NFS作为数据共享存储
1.创建ClassStorage
[root@master mysql]# cat nfs-storageclass.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
namespace: default
name: ml-pv1
annotations:
storageclass.kubernetes.io/is-default-class: "false"
provisioner: storage-nfs
parameters:
archiveOnDelete: "true"
mountOptions:
- hard
- nfsvers=4
[root@master mysql]# kubectl apply -f nfs-storageclass.yaml
storageclass.storage.k8s.io/ml-pv1 created
2.创建PVC
[root@master mysql]# cat mysql-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: model-db-pv-claim
namespace: default
spec:
storageClassName: ml-pv1
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 5Gi
[root@master mysql]# kubectl apply -f mysql-pvc.yaml
persistentvolumeclaim/model-db-pv-claim created
3.创建mysql pods
[root@master mysql]# cat mysql.yaml
apiVersion: v1
kind: Service
metadata:
name: mysql
spec:
selector:
app: mysql
ports:
- protocol: TCP
port: 3306
targetPort: 3306
nodePort: 31306
type: NodePort
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql
labels:
app: mysql-test
spec:
replicas: 1
selector:
matchLabels:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql-test
image: mysql:5.7
env:
- name: MYSQL_ROOT_PASSWORD
value: wwwwww
ports:
- containerPort: 3306
volumeMounts:
- mountPath: "/var/lib/mysql"
name: mysql-data
volumes:
- name: mysql-data
persistentVolumeClaim:
claimName: model-db-pv-claim
[root@master mysql]# kubectl apply -f mysql.yaml
service/mysql created
deployment.apps/mysql created
查看sc,pvc,pods状态
[root@master mysql]# kubectl get sc -A
NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE
ml-pv1 storage-nfs Delete Immediate false 5m50s
nfs-storage storage-nfs Delete Immediate false 2d18h
[root@master mysql]# kubectl get pvc -A
NAMESPACE NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
default elasticsearch-data-es-es-master-0 Bound pvc-74f05911-d39a-4bfe-9c6b-8c06a1ed1c4c 1Gi RWO nfs-storage 11d
default model-db-pv-claim Bound pvc-f99d7409-ed8e-47f3-bc5f-f7e1eb7ea859 5Gi RWO ml-pv1 4m33s
dev storage-pvc Bound pvc-fb376b03-4f35-4ebf-9053-6c67b1deca9d 10Gi RWO nfs-storage 2d18h
[root@master mysql]# kubectl get po --namespace=default
NAME READY STATUS RESTARTS AGE
beat-beat-filebeat-22wnc 1/1 Running 14 (70m ago) 11d
beat-beat-filebeat-6t8jj 1/1 Running 22 (70m ago) 11d
beat-beat-filebeat-sr5dm 1/1 Running 13 (70m ago) 11d
demo-tomcat-7456f7f48-6v84k 0/1 ImagePullBackOff 10 (70m ago) 11d
es-es-master-0 1/1 Running 13 (70m ago) 11d
kibana-kb-676f6bff87-98bvq 1/1 Running 13 (70m ago) 11d
mysql-76b486b9f5-t84tt 1/1 Running 0 4m44s
测试mysql pod漂移后数据是否存在
[root@master mysql]# kubectl exec -it mysql-76b486b9f5-t84tt -- mysql -uroot -pwwwwww
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 2
Server version: 5.7.36 MySQL Community Server (GPL)
Copyright (c) 2000, 2021, 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> create database testdb;
Query OK, 1 row affected (0.03 sec)
mysql> use testdb;
Database changed
mysql> create table t1 (id int);
Query OK, 0 rows affected (0.04 sec)
mysql> insert into t1 values (1111);
Query OK, 1 row affected (0.02 sec)
mysql> select * from t1;
+------+
| id |
+------+
| 1111 |
+------+
1 row in set (0.00 sec)
[root@master 0613]# kubectl get po -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
beat-beat-filebeat-22wnc 1/1 Running 14 (73m ago) 11d 192.168.56.200 master <none> <none>
beat-beat-filebeat-6t8jj 1/1 Running 22 (73m ago) 11d 192.168.56.202 node02 <none> <none>
beat-beat-filebeat-sr5dm 1/1 Running 13 (73m ago) 11d 192.168.56.201 node01 <none> <none>
demo-tomcat-7456f7f48-6v84k 0/1 ImagePullBackOff 10 (73m ago) 11d 10.244.0.50 master <none> <none>
es-es-master-0 1/1 Running 13 (73m ago) 11d 10.244.2.57 node02 <none> <none>
kibana-kb-676f6bff87-98bvq 1/1 Running 13 (73m ago) 11d 10.244.1.36 node01 <none> <none>
mysql-76b486b9f5-t84tt 1/1 Running 0 7m45s 10.244.0.52 master <none> <none>
[root@master 0613]# kubectl delete pod mysql-76b486b9f5-t84tt
pod "mysql-76b486b9f5-t84tt" deleted
[root@master 0613]# kubectl get po -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
beat-beat-filebeat-22wnc 1/1 Running 14 (73m ago) 11d 192.168.56.200 master <none> <none>
beat-beat-filebeat-6t8jj 1/1 Running 22 (73m ago) 11d 192.168.56.202 node02 <none> <none>
beat-beat-filebeat-sr5dm 1/1 Running 13 (73m ago) 11d 192.168.56.201 node01 <none> <none>
demo-tomcat-7456f7f48-6v84k 0/1 ImagePullBackOff 10 (73m ago) 11d 10.244.0.50 master <none> <none>
es-es-master-0 1/1 Running 13 (73m ago) 11d 10.244.2.57 node02 <none> <none>
kibana-kb-676f6bff87-98bvq 1/1 Running 13 (73m ago) 11d 10.244.1.36 node01 <none> <none>
mysql-76b486b9f5-nmbjz 1/1 Running 0 7s 10.244.1.38 node01 <none> <none>
[root@master mysql]# kubectl exec -it mysql-76b486b9f5-nmbjz -- mysql -uroot -pwwwwww
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 2
Server version: 5.7.36 MySQL Community Server (GPL)
Copyright (c) 2000, 2021, 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> use testdb;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select * from t1;
+------+
| id |
+------+
| 1111 |
+------+
1 row in set (0.00 sec)
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