美文网首页
kubernetes(K8S)存储卷管理

kubernetes(K8S)存储卷管理

作者: 一个小运维 | 来源:发表于2021-07-07 08:56 被阅读0次

configmap配置管理

创建 configmap

由于 apache 与 nginx 都使用 80 端口，把之前的实验容器全部删除

[root@master ~]# mkdir /var/webconf
[root@master ~]# docker run -itd --name mynginx 192.168.1.100:5000/myos:nginx
9f719d0e797f81887b21985a31f426c1f2c48efd24a2c6666ecf41396fb99e93
[root@master ~]# docker cp mynginx:/usr/local/nginx/conf/nginx.conf /var/webconf/
[root@master ~]# docker rm -f mynginx
mynginx
[root@master ~]# ls -l /var/webconf/
total 4
-rw-r--r-- 1 root root 2656 Jul 25  2020 nginx.conf
[root@master ~]# vim /var/webconf/nginx.conf 
... ...
        location ~ \.php$ {
            root           html;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            include        fastcgi.conf;
        }
... ...
[root@master ~]# kubectl create configmap nginx-conf --from-file=/var/webconf/nginx.conf 
configmap/nginx-conf created
[root@master ~]# kubectl get configmaps 
NAME         DATA   AGE
nginx-conf   1      8s
[root@master ~]#
配置 configmap

在 yaml 中引用 configmap 定义

[root@master ~]# vim webnginx.yaml
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: webnginx
spec:
  selector:
    matchLabels:
      myapp: nginx
  replicas: 1
  template:
    metadata:
      labels:
        myapp: nginx
    spec:
      volumes:                      # 新添加
      - name: nginx-php             # 新添加（标记1）
        configMap:                  # 新添加
          name: nginx-conf          # 新添加，必须与 configmap 命令创建的名称相同
      containers:
      - name: nginx
        image: 192.168.1.100:5000/myos:nginx
        volumeMounts:               # 新添加
        - name: nginx-php           # 新添加，必须与（标记1）名称相同
          subPath: nginx.conf       # 新添加
          mountPath: /usr/local/nginx/conf/nginx.conf     # 新添加
        ports:
        - protocol: TCP
          containerPort: 80
      restartPolicy: Always

[root@master ~]# kubectl apply -f webnginx.yaml 
deployment.apps/webnginx created
[root@master ~]# kubectl get pod 
NAME                        READY   STATUS    RESTARTS   AGE
webnginx-844859695b-5s7m7   1/1     Running   0          10s
[root@master ~]# kubectl exec -it webnginx-844859695b-5s7m7 -- /bin/bash
[root@webnginx-844859695b-5s7m7 html]# cat /usr/local/nginx/conf/nginx.conf
# 查看配置文件是否改变了
[root@webnginx-844859695b-kmwwh html]# ss -ltun
Netid  State      Recv-Q Send-Q      Local Address:Port      Peer Address:Port            
tcp    LISTEN     0      128                     *:80                   *:*                                
[root@webnginx-844859695b-kmwwh html]# exit
[root@master ~]# kubectl delete -f webnginx.yaml 
deployment.apps "webnginx" deleted
[root@master ~]#
添加 php 容器
[root@master ~]# vim webnginx.yaml
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: webnginx
spec:
  selector:
    matchLabels:
      myapp: nginx
  replicas: 1
  template:
    metadata:
      labels:
        myapp: nginx
    spec:
      volumes:
      - name: nginx-php
        configMap: 
          name: nginx-conf
      containers:
      - name: nginx
        image: 192.168.1.100:5000/myos:nginx
        volumeMounts:
        - name: nginx-php
          subPath: nginx.conf
          mountPath: /usr/local/nginx/conf/nginx.conf
        ports:
        - protocol: TCP
          containerPort: 80
      - name: php-backend                       # 新添加
        image: 192.168.1.100:5000/myos:php-fpm  # 新添加
      restartPolicy: Always

[root@master ~]# kubectl apply -f config/webnginx.yaml 
deployment.apps/webnginx created
[root@master ~]# kubectl get pod -o wide
NAME                        READY   STATUS    RESTARTS   AGE    IP            NODE      
webnginx-6c9f6fd675-7rmzk   2/2     Running   0          5s     10.244.2.25   node-0002
[root@master ~]# kubectl exec -it webnginx-6c9f6fd675-7rmzk -c nginx -- /bin/bash
[root@webnginx-6c9f6fd675-7rmzk html]# ss -ltun
Netid  State      Recv-Q Send-Q      Local Address:Port      Peer Address:Port              
tcp    LISTEN     0      128         *:80                    *:*                  
tcp    LISTEN     0      128         127.0.0.1:9000          *:*
[root@webnginx-6c9f6fd675-7rmzk html]# exit
[root@master ~]# curl http://10.244.2.25/info.php
<pre>
Array
(
    [REMOTE_ADDR] => 10.244.0.0
    [REQUEST_METHOD] => GET
    [HTTP_USER_AGENT] => curl/7.29.0
    [REQUEST_URI] => /info.php
)
php_host:   webnginx-6c9f6fd675-7rmzk
1229
[root@master ~]#

emptydir 存储卷

[root@master ~]# vim webcache.yaml 
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: webcache
spec:
  selector:
    matchLabels:
      myapp: cache
  replicas: 1
  template:
    metadata:
      labels:
        myapp: cache
    spec:
      volumes:                       # 新添加
      - name: empty-data             # 新添加
        emptyDir: {}                 # 新添加
      containers:
      - name: apache
        image: 192.168.1.100:5000/myos:httpd
        stdin: false
        tty: false
        volumeMounts:                # 新添加
        - name: empty-data           # 新添加
          mountPath: /var/cache      # 新添加
        ports:
        - protocol: TCP
          containerPort: 80
      restartPolicy: Always

[root@master ~]# kubectl apply -f webcache.yaml 
deployment.apps/webcache created
[root@master ~]# kubectl exec -it webcache-c58847c54-qw9lh -- /bin/bash
[root@webcache-c58847c54-qw9lh html]# df -h
Filesystem       Size   Used       Avail        Use%       Mounted on
/dev/vda1        40G    2.9G       35G          8%         /var/cache
... ...
[root@webcache-c58847c54-qw9lh html]# exit
[root@master ~]#

hostpath 存储卷

[root@master ~]# cat webcache.yaml 
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: webcache
spec:
  selector:
    matchLabels:
      myapp: cache
  replicas: 1
  template:
    metadata:
      labels:
        myapp: cache
    spec:
      volumes:
      - name: empty-data
        emptyDir: {}
      - name: log-data                # 新添加
        hostPath:                     # 新添加
          path: /var/weblog           # 新添加
          type: DirectoryOrCreate     # 新添加
      containers:
      - name: apache
        image: 192.168.1.100:5000/myos:httpd
        stdin: false
        tty: false
        volumeMounts:
        - name: empty-data
          mountPath: /var/cache
        - name: log-data             # 新添加
          mountPath: /var/log/httpd  # 新添加
        ports:
        - protocol: TCP
          containerPort: 80
      restartPolicy: Always
[root@master ~]# kubectl apply -f webcache.yaml 
deployment.apps/webcache created
[root@master ~]# kubectl get pod -o wide
NAME                        READY   STATUS    RESTARTS   AGE   IP            NODE
webcache-75588b9cc5-xzkvc   1/1     Running   0          4s    10.244.2.30   node-0002
[root@master ~]# curl http://10.244.2.30/
this is apache
[root@master ~]# ssh 192.168.1.32
root@192.168.1.32's password: 
Last login: Mon Apr 26 10:41:58 2021 from 192.168.1.252
Welcome to Huawei Cloud Service

[root@node-0002 ~]# ls -l /var/weblog/
total 16
-rw-r--r--   1 root root   86 Apr 26 13:12 access_log
-rw-r--r--   1 root root  489 Apr 26 13:12 error_log
[root@node-0002 ~]# cat /var/weblog/access_log 
10.244.0.0 - - [26/Apr/2021:05:12:59 +0000] "GET / HTTP/1.1" 200 15 "-" "curl/7.29.0"
[root@node-0002 ~]#

持久卷

搭建NFS服务器
[root@registry ~]# yum install -y nfs-utils
[root@registry ~]# mkdir -m 777 /var/webroot
[root@registry ~]# vim  /etc/exports
/var/webroot    *(rw)
[root@registry ~]# systemctl enable --now nfs
#---------------------------------所有节点都需要 nfs 软件包-------------------------
[root@node-0001 ~]# yum install -y nfs-utils
#--------------------------------------------------------------------------------
[root@node-0002 ~]# yum install -y nfs-utils
#--------------------------------------------------------------------------------
[root@node-0003 ~]# yum install -y nfs-utils
#-------------------------------下面在任意其他节点测试------------------------------
[root@master ~]# yum install -y nfs-utils
[root@master ~]# showmount -e 192.168.1.100
Export list for 192.168.1.100:
/var/webroot *
[root@master ~]#
创建 pv
[root@master ~]# vim mypv.yaml 
---
kind: PersistentVolume
apiVersion: v1
metadata:
  name: pv-nfs
spec:
  volumeMode: Filesystem
  capacity:
    storage: 30Gi
  accessModes:
  - ReadWriteOnce
  - ReadOnlyMany
  - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  nfs:
    server: 192.168.1.100
    path: /var/webroot

[root@master ~]# kubectl apply -f mypv.yaml 
persistentvolume/pv-nfs created
[root@master ~]# kubectl get pv
NAME     CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS          AGE
pv-nfs   30Gi       RWO,ROX,RWX    Retain           Available       3s
创建 pvc
[root@master configmap]# vim mypvc.yaml 
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: pvc-nfs
spec:
  volumeMode: Filesystem
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 25Gi

[root@master configmap]# kubectl apply -f mypvc.yaml
[root@master configmap]# kubectl get pv
NAME     CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM
pv-nfs   30Gi       RWX            Retain           Bound    default/pvc-nfs
[root@master configmap]# kubectl get pvc
NAME      STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
pvc-nfs   Bound    pv-nfs   30Gi       RWO,ROX,RWX                   27s
应用持久卷
[root@master ~]# cat webnginx.yaml 
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: webnginx
spec:
  selector:
    matchLabels:
      myapp: nginx
  replicas: 1
  template:
    metadata:
      labels:
        myapp: nginx
    spec:
      volumes:
      - name: nginx-php
        configMap: 
          name: nginx-conf
      - name: website                     # 新添加
        persistentVolumeClaim:            # 新添加
          claimName: pvc-nfs              # 新添加
      containers:
      - name: nginx
        image: 192.168.1.100:5000/myos:nginx
        volumeMounts:
        - name: nginx-php
          subPath: nginx.conf
          mountPath: /usr/local/nginx/conf/nginx.conf
        - name: website                     # 新添加
          mountPath: /usr/local/nginx/html  # 新添加
        ports:
        - protocol: TCP
          containerPort: 80
      - name: php-backend
        image: 192.168.1.100:5000/myos:php-fpm
        volumeMounts:                       # 新添加
        - name: website                     # 新添加
          mountPath: /usr/local/nginx/html  # 新添加
      restartPolicy: Always

[root@master ~]# kubectl delete -f webnginx.yaml 
deployment.apps "webnginx" deleted
[root@master ~]# kubectl apply -f webnginx.yaml 
deployment.apps/webnginx created
[root@master ~]# kubectl get pod -o wide
NAME                       READY   STATUS    RESTARTS   AGE   IP            NODE
webnginx-d488b9447-t62cl   2/2     Running   0          7s    10.244.2.32   node-0002
[root@master ~]# curl http://10.244.2.32/
# 在 nfs 上创建修改页面，然后在容器端访问测试

相关文章

网友评论

      本文标题：kubernetes(K8S)存储卷管理

      本文链接：https://www.haomeiwen.com/subject/cmqoultx.html

      延伸阅读

      深度阅读

      • 您也可以注册成为美文阅读网的作者，发表您的原创作品、分享您的心情！

      栏目导航

      热点阅读

      关于我们|服务条款|联系我们|kubernetes(K8S)存储卷管理|投稿指南|网站地图|RSS订阅|排版工具|手机版

      提供经典美文摘抄,优美散文欣赏,现代诗歌精选,短篇小说,心情随笔,表白情书范文,故事会在线阅读欣赏

      Copyright © 2014-2023 Haomeiwen.com All Rights Reserved. 好美文阅读网 版权所有

      备案信息：桂公网安备 45052102000051号 · 桂ICP备13007215号-3

      本站所收录作品、热点评论等信息部分来源互联网，目的只是为了系统归纳学习和传递资讯

      所有作品版权归原创作者所有，与本站立场无关，如不慎侵犯了你的权益，请联系我们告知，我们将做删除处理！