emptyDIR 临时目录
hostPath :使用主机的路径
网络存储：
传统的设备存储：NAS,SAN
分布式存储：glusterfs，rbd，cephfs
云存储：EBS,Azure，阿里云的
一、emptyDir 的类型：一个pod里面2个容易，挂载同一个目录，
注意：emptyDir的生命周期同pod周期，简单来说，pod删除了，emptyDir也随之删除
apiVersion: v1
kind: Pod
metadata:
name: pod-demo
namespace: default
labels:
app: myapp
tier: frontend
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort:
volumeMounts: #容器挂载
- name: html
mountPath: /data/web/html/
- name: busybox
image: busybox:latest
command: ["/bin/sh" ,"-c","sleep 3600"]
volumeMounts: #容器挂载
- name: html
mountPath: /data/
volumes: #定义存储
- name: html
emptyDir: {}
二、hostPath 类型存储
apiVersion: v1
kind: Pod
metadata:
name: nginx-volume
namespace: default
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort:
volumeMounts:
- name: html
mountPath: /usr/share/nginx/html/
volumes:
- name: html
hostPath:
path: /data/nginx/v1/
type: DirectoryOrCreate
三、nfs 类型存储
首先要准备好nfs，我在172.17.1.36的机器上安装nfs，到处的目录为/nfs/data
yum install nfs-utils
vim vim /etc/exports
/nfs/data/ 172.17.0.0/16(rw,no_root_squash)
systemctl start nfs
nfs准备好了，注意，在pod的节点机器要一定确定可以挂载nfs类型的，否则创建pod会出错。执行yum install nfs-utils 就可以挂载了
nfs pod 的yaml文件：
apiVersion: v1
kind: Pod
metadata:
name: nginx-volume-nfs
namespace: default
spec:
containers:
- name: nginx-nfs
image: nginx
ports:
- containerPort:
volumeMounts:
- name: html
mountPath: /usr/share/nginx/html/
volumes:
- name: html
nfs:
path: /nfs/data/
server: 172.17.1.36
四、pv，pvc的使用
对于pv和pvc，首先要准备存储的，我用的是nfs，在172.17.1.36的节点上划分了5个路径作为存储的设备。
mkdir /data/{v1,v2,v3,v4,v5} -pv
vim /etc/exports
添加如下的内容：
/data/v1 172.17.0.0/16(rw,no_root_squash)
/data/v2 172.17.0.0/16(rw,no_root_squash)
/data/v3 172.17.0.0/16(rw,no_root_squash)
/data/v4 172.17.0.0/16(rw,no_root_squash)
/data/v5 172.17.0.0/16(rw,no_root_squash)
保存，导出下。
exportfs -avr
查看下是否正常。
nfs的存储的好了。下一步要先创建pv，yaml文件如下
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv01
labels:
name: pv01
spec:
nfs:
path: /data/v1/
server: 172.17.1.36
accessModes: ["ReadWriteOnce","ReadWriteMany"]
capacity:
storage: 5Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv02
labels:
name: pv02
spec:
nfs:
path: /data/v2/
server: 172.17.1.36
accessModes: ["ReadWriteOnce","ReadWriteMany"]
capacity:
storage: 3Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv03
labels:
name: pv03
spec:
nfs:
path: /data/v3/
server: 172.17.1.36
accessModes: ["ReadWriteOnce","ReadWriteMany"]
capacity:
storage: 5Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv04
labels:
name: pv04
spec:
nfs:
path: /data/v4/
server: 172.17.1.36
accessModes: ["ReadWriteOnce","ReadWriteMany"]
capacity:
storage: 10Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv05
labels:
name: pv05
spec:
nfs:
path: /data/v5/
server: 172.17.1.36
accessModes: ["ReadWriteOnce","ReadWriteMany"]
capacity:
storage: 10Gi
kubectl apply -f pv-nfs.yaml
显示，pv创建完成
接下来创建pvc 和pod，yaml文件如下
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mypvc
namespace: default
spec:
accessModes: ["ReadWriteMany"]
resources:
requests:
storage: 5Gi #到这里是创建pvc的
---
apiVersion: v1
kind: Pod
metadata:
name: nginx-volume-pvc
namespace: default
spec:
containers:
- name: nginx-pvc
image: nginx
ports:
- containerPort:
volumeMounts:
- name: html
mountPath: /usr/share/nginx/html/
volumes: #这里是选择volume的类型
- name: html
persistentVolumeClaim:
claimName: mypvc
显示pvc创建好了，同时pvc绑定了一个pv，到此pv和pvc的安装部署完成。
ps：pv和pvc是一对一绑定的。但是多个pod可以挂载同一个pvc
通常使用的流程是，首先创建存储，在创建pv，接着创建pvc，pod挂载到相应的pvc。