Kubernetes集群存储

首先查看k8s集群是否正常[root@k8s-master pod]# kubectl get nodeNAMESTATUSROLESAGEVERSIONk8s-masterReadymaster6d10hv1.17.0k8s-node1Ready<none>6d10hv1.17.0k8s-node2Ready<none>6d10hv1.17.0在

你怎么穿品如的衣服

771人浏览 · 2020-07-27 21:29:54

你怎么穿品如的衣服 · 2020-07-27 21:29:54 发布

首先查看k8s集群是否正常

[root@k8s-master pod]# kubectl get node
NAME         STATUS   ROLES    AGE     VERSION
k8s-master   Ready    master   6d10h   v1.17.0
k8s-node1    Ready    <none>   6d10h   v1.17.0
k8s-node2    Ready    <none>   6d10h   v1.17.0

在另外的机器上面安装nfs centos7的图形化默认是安装了nfs服务器的
要是没有安装则安装下

[root@client ~]# yum install -y nfs-utils rpcbind
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package nfs-utils.x86_64 1:1.3.0-0.8.el7 will be updated
---> Package nfs-utils.x86_64 1:1.3.0-0.66.el7 will be an update
--> Processing Dependency: libtirpc >= 0.2.4-0.7 for package: 1:nfs-utils-1.3.0-0.66.el7.x86_64
--> Processing Dependency: gssproxy >= 0.7.0-3 for package: 1:nfs-utils-1.3.0-0.66.el7.x86_64
---> Package rpcbind.x86_64 0:0.2.0-26.el7 will be updated
---> Package rpcbind.x86_64 0:0.2.0-49.el7 will be an update
..............................
Updated:
  nfs-utils.x86_64 1:1.3.0-0.66.el7                                                             rpcbind.x86_64 0:0.2.0-49.el7

Dependency Updated:
  gssproxy.x86_64 0:0.7.0-28.el7    krb5-libs.x86_64 0:1.15.1-46.el7    libcollection.x86_64 0:0.7.0-32.el7    libini_config.x86_64 0:1.3.1-32.el7    libtirpc.x86_64 0:0.2.4-0.16.el7

Complete!

安装完毕之后创建文件夹并赋予相关的权限

[root@client ~]# mkdir  /nfs1
[root@client ~]# chmod 777 /nfs1
[root@client ~]# chown nfsnobody /nfs1
[root@client ~]# cat /etc/exports
/nfs1 *(rw,no_root_squash,no_all_squash,sync)
[root@client ~]# systemctl stop firewalld.service
[root@client ~]# setenforce 0
[root@client ~]# systemctl restart nfs rpcbind
[root@client ~]#

在其他任意一个节点验证是否能正常使用

[root@k8s-node1 ~]# showmount -e 192.168.40.13
Export list for 192.168.40.13:
/nfs1 *
[root@k8s-node1 ~]# mkdir /nfs
[root@k8s-node1 ~]# mount -t nfs 192.168.40.13:/nfs1 /nfs
[root@k8s-node1 ~]# df -hT|grep nfs
192.168.40.13:/nfs1     nfs4       37G  5.8G   31G  16% /nfs
[root@k8s-node1 ~]#
[root@k8s-node1 ~]# umount /nfs

在master机器上面创建pv

[root@k8s-master pod]# cat pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfspv1
spec:
  capacity:
    storage: 1Gi
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs
  nfs:
    path: /nfs1
    server: 192.168.40.13
    [root@k8s-master pod]# kubectl create -f pv.yaml
[root@k8s-master pod]# kubectl get pv
NAME     CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM               STORAGECLASS   REASON   AGE
nfspv1   1Gi        RWO            Retain           Bound    default/www-web-0   nfs                     33m
[root@k8s-master pod]#

创建PVC

[root@k8s-master pod]# cat pvc.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  ports:
  - port: 80
    name: web
  clusterIP: None
  selector:
    app: nginx
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:
  selector:
    matchLabels:
      app: nginx
  serviceName: "nginx"
  replicas: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.8
        ports:
        - containerPort: 80
          name: web
        volumeMounts:
        - name: www
          mountPath: /usr/share/nginx/html
  volumeClaimTemplates:
  - metadata:
      name: www
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: "nfs"
      resources:
        requests:
          storage: 1Gi

运行并查看

[root@k8s-master pod]# kubectl create -f pvc.yaml
[root@k8s-master pod]# kubectl get pvc
NAME        STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
www-web-0   Bound    nfspv1   1Gi        RWO            nfs            36m
[root@k8s-master pod]#

进入pod验证数据是否通过nfs保存到存储端了

root@web-0:/# cd /usr/share/nginx/html/
root@web-0:/usr/share/nginx/html# ls
index.html
root@web-0:/usr/share/nginx/html# date > index.html
root@web-0:/usr/share/nginx/html# cat index.html
Mon Jul 27 13:23:56 UTC 2020
root@web-0:/usr/share/nginx/html#

在nfs端查看内容

[root@client ~]# cd /nfs1/
[root@client nfs1]# ls
index.html
[root@client nfs1]# cat index.html
Mon Jul 27 13:23:56 UTC 2020
[root@client nfs1]#

在k8s集群内容访问

[root@k8s-master pod]# kubectl get pod -o wide
NAME    READY   STATUS    RESTARTS   AGE   IP            NODE        NOMINATED NODE   READINESS GATES
web-0   1/1     Running   0          41m   10.244.1.46   k8s-node1   <none>           <none>
[root@k8s-master pod]# curl 10.244.1.46
Mon Jul 27 13:23:56 UTC 2020
[root@k8s-master pod]#

通过上面的实验k8s集群可以通过多种方式存储数据nfs只是其中的一种，还包括分布式存储，块储存等多种方式。

2、hostpath

[root@k8s-master yaml]# cat hostpath.yaml
apiVersion: v1
kind: Pod
metadata:
  name: test-pd
spec:
  containers:
  - image: nginx:1.8
    name: test-container
    volumeMounts:
    - mountPath: /usr/share/nginx/html
      name: test-volume
  volumes:
  - name: test-volume
    hostPath:
      path: /web
      type: DirectoryOrCreate
[root@k8s-master yaml]#

在节点1上面创建文件

[root@k8s-node1 ~]# mkdir /web
[root@k8s-node1 ~]# echo k8s-node1 > /web/index.html

节点2上面创建文件

[root@k8s-node2 ~]# mkdir /web
[root@k8s-node2 ~]# echo k8s-node2 > /web/index.html

应用yaml文件

[root@k8s-master yaml]# kubectl create -f hostpath.yaml
pod/test-pd created
[root@k8s-master yaml]# kubectl get pod -o wide
NAME                     READY   STATUS    RESTARTS   AGE   IP            NODE        NOMINATED NODE   READINESS GATES
test-pd                  1/1     Running   0          6s    10.244.2.5    k8s-node2   <none>           <none>
[root@k8s-master yaml]# while true; do curl 10.244.2.5;sleep 2; done
k8s-node2
k8s-node2
k8s-node2
k8s-node2
^C
[root@k8s-master yaml]#

3、empty

[root@k8s-master yaml]# cat pod-demo-vol.yaml
apiVersion: v1
kind: Pod
metadata:
  name: pod-demo
  namespace: default
  labels:
    app: myapp
    tier: frontend
  annotations:
    jingwei.com/create-by: "cluster admin"
spec:
  containers:
  - name: myapp
    image: ikubernetes/myapp:v1
    ports:
    - name:
      containerPort: 80
    volumeMounts:
    - name: html
      mountPath: /data/web/html
  - name: busybox
    image: busybox
    imagePullPolicy: IfNotPresent
    volumeMounts:
    - name: html
      mountPath: /data/
    command:
    - "/bin/sh"
    - "-c"
    - "sleep 7200"
  volumes:
  - name: html
    emptyDir: {}

写入数据并查看数据

[root@k8s-master yaml]# kubectl exec -it pod-demo -c busybox -- /bin/sh
/ # ls
bin   data  dev   etc   home  proc  root  sys   tmp   usr   var
/ # date > data/index.html
/ # date >> data/index.html
/ # date >> data/index.html
/ # date >> data/index.html
/ # cat data/index.html
Tue Sep  1 07:34:24 UTC 2020
Tue Sep  1 07:34:29 UTC 2020
Tue Sep  1 07:34:31 UTC 2020
Tue Sep  1 07:34:32 UTC 2020
/ #

[root@k8s-master yaml]# kubectl exec -it pod-demo -c myapp -- /bin/sh
/ # ls
bin    dev    home   media  proc   run    srv    tmp    var
data   etc    lib    mnt    root   sbin   sys    usr
/ # cat data/web/html/index.html
Tue Sep  1 07:34:24 UTC 2020
Tue Sep  1 07:34:29 UTC 2020
Tue Sep  1 07:34:31 UTC 2020
Tue Sep  1 07:34:32 UTC 2020
/ #

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