tonglin0325的个人主页

K8S学习笔记——创建pv

tonglin0325

在K8S上使用存储的时候，需要创建Persistence Volumes（持久化卷）用于持久化数据，否则当pod重启后，数据将会丢失，可以参考官方文档：

1
2
https://kubernetes.io/zh-cn/docs/concepts/storage/persistent-volumes/

常用的持久卷类型有local（
 节点上挂载的本地存储设备），rbd（依赖Ceph，RBD 卷只能由单个使用者以读写模式安装。不允许同时写入），cephfs（依赖Ceph，同一 cephfs 卷可同时被多个写者挂载）等

1
2
https://kubernetes.io/zh-cn/docs/concepts/storage/volumes/

persistent volume，persistent volume claim和storage class的区别可以参考：Kubernetes对象之PersistentVolume，StorageClass和PersistentVolumeClaim

默认的storage class有HostPath，HostPath 卷 （仅供单节点测试使用；不适用于多节点集群； 请尝试使用 local 卷作为替代）

1
2
3
4
kubectl get sc -A
NAME                 PROVISIONER                RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
standard (default)   k8s.io/minikube-hostpath   Delete          Immediate           false                  40d

如果要创建一个local的storage class，首先需要编写一个local-storage.yaml

1
2
3
4
5
6
7
8
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer
reclaimPolicy: Retain

创建local sc

1
2
kubectl apply -f local-storage.yaml

查看创建的sc

1
2
3
4
5
kubectl get sc -A
NAME                 PROVISIONER                    RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
local-storage        kubernetes.io/no-provisioner   Retain          WaitForFirstConsumer   false                  2m41s
standard (default)   k8s.io/minikube-hostpath       Delete          Immediate              false                  41d

给local storage class下面增加一个kafka pv，kafka-local-pv.yaml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
apiVersion: v1
kind: PersistentVolume
metadata:
  name: data-kafka-0
spec:
  capacity:
    storage: 5Gi
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /tmp/kafka/data-0
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - minikube

创建kafka pv

1
2
kubectl apply -f kafka-local-pv.yaml

查看创建的kafka pv

1
2
3
4
kubectl get pv -A
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM                              STORAGECLASS    REASON   AGE
data-kafka-0                               5Gi        RWO            Retain           Available                                      local-storage            6s

给local storage class下面增加一个zk pv，zookeeper-local-pv.yaml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
apiVersion: v1
kind: PersistentVolume
metadata:
  name: data-zookeeper-0
spec:
  capacity:
    storage: 5Gi
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /tmp/zookeeper/data-0
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - master

创建zookeeper pv

1
2
kubectl apply -f zookeeper-local-pv.yaml

查看创建的zookeeper pv

1
2
3
4
5
kubectl get pv,pvc --all-namespaces
NAME                                                        CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM                              STORAGECLASS    REASON   AGE
persistentvolume/data-kafka-0                               5Gi        RWO            Retain           Available                                      local-storage            12m
persistentvolume/data-zookeeper-0                           5Gi        RWO            Retain           Available                                      local-storage            2m5s

　　

 

tonglin0325

标签

标签云

AWS Airbnb Android CDH Doris ELK Flink Git Grafana HAProxy HBase Hadoop Hive Hudi InfluxDB JDBC JMeter JVM Java JavaWeb LaTex Linkedin Linux ML ML Infra MPP Maven MySQL Nexus OpenTSDB Paper Play Prometheus Python React Redis RocksDB Scala Solr Spark SpringBoot SpringMVC Thrift YARN antlr arthas avro cassandra clickhouse confluent docker filebeat flume golang google gradle hexo impala jenkins k8s kafka kerberos kudu ldap mac mongo mybatis nginx nlp open-falcon openwrt parquet presto ranger scyllaDB twitter zookeeper 刷题 前端 图存储及计算 多线程 广告系统 开发工具 数据结构 杂谈 正则表达式 算法 系统设计 计算机网络 设计模式

文章归档

最近文章