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K8S部署lnmp项目全过程

2024年09月07日 • 云虚拟主机 •我要评论
lnmp为什么要迁移到k8s将lnmp迁移到k8s架构上会使得应用的启动、迁移、部署变得即简单又安全。不必担心应用迁移后工作出现问题，也不用担心一台服务器无法应付突发的用户量。架构设计mysql是一种

lnmp为什么要迁移到k8s

将lnmp迁移到k8s架构上会使得应用的启动、迁移、部署变得即简单又安全。

不必担心应用迁移后工作出现问题，也不用担心一台服务器无法应付突发的用户量。

架构设计

mysql是一种有状态服务，mysql在某些情况下如果发生故障性退出可能会出现服务无法再次启动的情况，所以使用storageclass(nfs)来挂载，并使用deployments来保证应用的持续,这里设置replicas为1,后期部署主从后再行修改

pvc设置

[root@master lnmp]# kubectl create ns  lnmp 
namespace/lnmp created

[root@master lnmp]# cat  lnmp-pvc.yaml 
apiversion: v1
kind: persistentvolumeclaim
metadata:
  name:  mysql-pvc
  namespace: lnmp
spec:
  resources:
    requests:
      storage: 5gi
  accessmodes:
    - readwritemany
  storageclassname: mysc1

---

apiversion: v1
kind: persistentvolumeclaim
metadata:
  name:  php-pvc
  namespace: lnmp
spec:
  resources:
    requests:
      storage: 5gi
  accessmodes:
    - readwritemany
  storageclassname: mysc1
  
[root@master lnmp]# kubectl apply -f lnmp-pvc.yaml 
persistentvolumeclaim/mysql created
persistentvolumeclaim/php created

### 已部署sc,这边状态已经变更为 bound

[root@master lnmp]# kubectl get pvc -n lnmp 
name        status   volume                                     capacity   access modes   storageclass   age
mysql-pvc   bound    pvc-bb57ddc7-ae5e-4652-880a-08d8260314bb   5gi        rwx            mysc1          29s
php-pvc     bound    pvc-53c2880e-c383-41f1-8e09-c7106ea8c18f   5gi        rwx            mysc1          29s

mysql 配置

1. 创建mysql密码的认证 (secret)

[root@master lnmp]# kubectl create secret generic mysql-pass --from-literal=password=aa123456 -n lnmp 
secret/mysql-pass created
# 或者
[root@master ~]# vim mysql-secret.yaml
apiversion: v1
data:
  password: qwexmjm0nty=
kind: secret
metadata:
  creationtimestamp: null
  name: mysql-pass
  namespace: lnmp
  
[root@master ~]# kubectl apply -f mysql-secret.yaml 
secret/mysql-pass created

2. 创建mysql的service、deployment

2.1 这边使用了自建的harbor镜像仓库,配置dockerconfigjson类型的secret

kubectl create secret docker-registry  --dry-run=client  docker-harbor  --docker-server=registry.bianminchang.com:5001 --docker-username=admin --docker-password=li*****4   -o yaml > docker-secret.yaml

[root@master lnmp]# vim docker-secret.yaml 
apiversion: v1
data:
  .dockerconfigjson: eyjhdxrocyi6eyjyzwdpc3ryes5iawfubwluy2hhbmcuy29tojuwmdeionsidxnlcm5hbwuioijhzg1pbiisinbhc3n3b3jkijoi************oiwvdsdgfxndzir2x3y0dsd2neut0ifx19
kind: secret
metadata:
  creationtimestamp: null
  name: docker-harbor
type: kubernetes.io/dockerconfigjson

[root@master lnmp]# kubectl apply -f docker-secret.yaml 
secret/docker-harbor created

2.2 mysql的service、deployment

[root@master lnmp]# cat  mysql-deploy.yaml 
#apiversion: v1                          # 这边由于项目数据库连接无法读取集群内的svc,使用服务器的hostport
#kind: service
#metadata:
#  name: lnmp-mysql
#  namespace: lnmp
#  labels:
#    app: lnmp-mysql
#spec:
#  type: 
#  ports:
#    - protocol: tcp
#      port: 3306
#      nodeport: 3306
#  selector:
#    app: lnmp-mysql
---
apiversion: apps/v1
kind: deployment
metadata:
  name: lnmp-mysql
  namespace: lnmp
spec:
  selector:
    matchlabels:
      app: lnmp-mysql
  strategy:
    type: recreate
  template:
    metadata:
      labels:
        app: lnmp-mysql
    spec:
      nodename: master
      containers:
      - name: mysql
        image: registry.bianminchang.com:5001/lnmp/mysql:5.6
        imagepullpolicy: ifnotpresent
        env:
        - name: mysql_root_password
          valuefrom:
            secretkeyref:
              name: mysql-pass
              key: password
        ports: 
        - containerport: 3306
          hostport: 3306             # 服务器3306 端口
          name: mysql
        livenessprobe:
          tcpsocket:
            port: 3306
          initialdelayseconds: 90
          periodseconds: 15 
        volumemounts:
        - name: mysql-persistent-storage
          mountpath: /var/lib/mysql
        - name: etc-localtime
          mountpath: /etc/localtime
      imagepullsecrets:         # 指定镜像仓库拉取信息
      - name: docker-harbor
      volumes:
      - name: etc-localtime
        hostpath:
          path: /etc/localtime
      - name: mysql-persistent-storage
        persistentvolumeclaim:
          claimname: mysql-pvc

创建文件并检测

[root@master lnmp]# kubectl apply -f mysql-deploy.yaml
service/lnmp-mysql created
deployment.apps/lnmp-mysql created
[root@master lnmp]# kubectl get secrets 
name                  type                                  data   age
default-token-2cqf5   kubernetes.io/service-account-token   3      54m
docker-harbor         kubernetes.io/dockerconfigjson        1      6m16s

[root@master lnmp]# kubectl get pod
name                          ready   status    restarts   age
lnmp-mysql-5df7b46bcd-fk76k   1/1     running   0          6m1s

php配置

创建php的service,hpa(水平自动伸缩),deployment

[root@master lnmp]# cat  php-deploy.yaml 
apiversion: v1
kind: service
metadata:
  name: lnmp-php
  namespace: lnmp
spec:
  ports:
  - port: 9000
  selector:
    app: lnmp-php
---
apiversion: autoscaling/v1
kind: horizontalpodautoscaler
metadata:
  name: lnmp-php
spec:
  scaletargetref:
    apiversion: apps/v1
    kind: deployment
    name: lnmp-php
  minreplicas: 1
  maxreplicas: 10
  targetcpuutilizationpercentage: 85      # 当容器的cpu使用量超过85%时，调度器创建新的pod
---
apiversion: apps/v1
kind: deployment
metadata:
  name: lnmp-php
  namespace: lnmp
  labels:
    app: php
spec:
  replicas: 1
  selector:
    matchlabels:
      app: lnmp-php
  strategy:
    type: recreate
  template:
    metadata:
      labels:
        app: lnmp-php
    spec:
      containers:
      - name: php
        image: registry.bianminchang.com:5001/lnmp/php-fpm:7.0.4
        #image: php:test
        imagepullpolicy: ifnotpresent
        ports:
        - containerport: 9000
          name: php
        volumemounts:
        - name: php-persistent-storage
          mountpath: /usr/share/nginx/html
        - name: etc-localtime
          mountpath: /etc/localtime 
      imagepullsecrets:         # 指定镜像仓库拉取信息
      - name: docker-harbor
      volumes:
      - name: etc-localtime            # docker 时区挂载
        hostpath:
          path: /etc/localtime
      - name: php-persistent-storage
        persistentvolumeclaim:
          claimname: php-pvc

[root@master lnmp]# kubectl apply -f php-deploy.yaml 
service/lnmp-php unchanged
horizontalpodautoscaler.autoscaling/lnmp-php created
deployment.apps/lnmp-php unchanged

[root@master lnmp]# kubectl get hpa
name       reference             targets         minpods   maxpods   replicas   age
lnmp-php   deployment/lnmp-php   <unknown>/85%   1         10        3          17s

nginx配置

创建nginx的configmap，service，deployment

api deployment

[root@master nginx]#  vim api-deploy.yaml
# hpa pod 水平自动扩缩
apiversion: autoscaling/v1
kind: horizontalpodautoscaler
metadata:
  name: nginx-hpa
  namespace: lnmp
spec:
  maxreplicas: 5
  minreplicas: 2
  scaletargetref:
    apiversion: apps/v1
    kind: deployment
    name: api
  targetcpuutilizationpercentage: 80

---
apiversion: v1
kind: service
metadata:
  name: api
  namespace: lnmp
  labels:
    app: nginx
spec:
  ports:
  - name: nginx
    port: 80
    targetport: 80
  selector:
    app: api
---
apiversion: apps/v1
kind: deployment
metadata:
  name: api
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchlabels:
      app: api
  strategy:
    type: recreate
  template:
    metadata:
      labels:
        app: api
    spec:
      containers:
      - name: nginx
        image: registry.bianminchang.com:5001/lnmp/nginx:1.16.1
        imagepullpolicy: ifnotpresent
        ports:
        - containerport: 80
          name: nginx
        livenessprobe:
            httpget:
                path: /
                port: 80
            initialdelayseconds: 20
            periodseconds: 10
        volumemounts:
        - name: nginx-persistent-storage
          mountpath: /usr/share/nginx/html
        - name: factory-api-config
          mountpath: /etc/nginx/conf.d/default.conf
          subpath: default.conf
      volumes:
      - name: nginx-persistent-storage
        persistentvolumeclaim:
          claimname: php-pvc
      - name: factory-api-config
        configmap:
          name: factory-api-config

factory deployment 项目后台

[root@master nginx]# cat factory-deploy.yaml
apiversion: autoscaling/v1
kind: horizontalpodautoscaler
metadata:
  name: factory-hpa
  namespace: lnmp
spec:
  maxreplicas: 5
  minreplicas: 1
  scaletargetref:
    apiversion: apps/v1
    kind: deployment
    name: factory
  targetcpuutilizationpercentage: 80

---
apiversion: v1
kind: service
metadata:
  name: factory
  namespace: lnmp
  labels:
    app: nginx
spec:
  ports:
  - name: nginx
    port: 80
    targetport: 80
  selector:
    app: factory
---
apiversion: apps/v1
kind: deployment
metadata:
  name: factory
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchlabels:
      app: factory
  strategy:
    type: recreate
  template:
    metadata:
      labels:
        app: factory
    spec:
      containers:
      - name: nginx
        image: registry.bianminchang.com:5001/lnmp/nginx:1.16.1
        imagepullpolicy: ifnotpresent
        ports:
        - containerport: 80
          name: nginx
        livenessprobe:
            httpget:
                path: /
                port: 80
            initialdelayseconds: 20
            periodseconds: 10
        volumemounts:
        - name: nginx-persistent-storage
          mountpath: /usr/share/nginx/html
        - name: factory-config
          mountpath: /etc/nginx/conf.d/default.conf
          subpath: default.conf
      volumes:
      - name: nginx-persistent-storage
        persistentvolumeclaim:
          claimname: php-pvc
      - name: factory-config
        configmap:
          name: factory-config

factory-front. deployment. 项目前端

[root@master nginx]# cat  factory-front-deploy.yaml 
apiversion: autoscaling/v1
kind: horizontalpodautoscaler
metadata:
  name: nginx-hpa
  namespace: lnmp
spec:
  maxreplicas: 5
  minreplicas: 1
  scaletargetref:
    apiversion: apps/v1
    kind: deployment
    name: factory-front
  targetcpuutilizationpercentage: 80

---
apiversion: v1
kind: service
metadata:
  name: factory-front
  namespace: lnmp
  labels:
    app: nginx
spec:
  ports:
  - name: nginx
    port: 80
    targetport: 80
  selector:
    app: factory-front
---
apiversion: apps/v1
kind: deployment
metadata:
  name: factory-front
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchlabels:
      app: factory-front
  strategy:
    type: recreate
  template:
    metadata:
      labels:
        app: factory-front
    spec:
      containers:
      - name: nginx
        image: registry.bianminchang.com:5001/lnmp/nginx:1.16.1
        imagepullpolicy: ifnotpresent
        ports:
        - containerport: 80
          name: nginx
        livenessprobe:
            httpget:
                path: /
                port: 80
            initialdelayseconds: 20
            periodseconds: 10
        volumemounts:
        - name: nginx-persistent-storage
          mountpath: /usr/share/nginx/html
        - name: factory-front-config
          mountpath: /etc/nginx/conf.d/default.conf
          subpath: default.conf
      volumes:
      - name: nginx-persistent-storage
        persistentvolumeclaim:
          claimname: php-pvc
      - name: factory-front-config
        configmap:
          name: factory-front-config

nginx 配置

注意：

php与nginx不在同一个pod内,集群内通讯用svc, fastcgi_pass lnmp-php:9000;

lnmp-php 为php的svc

[root@master nginx]# cat factory-config.yaml 
apiversion: v1
kind: configmap
metadata:
  name: nginx-wp-config
  namespace: lnmp
data:
  default.conf: |-
    server {
        listen 80;
        server_name localhost;
        root /usr/share/nginx/html;
        index index.html index.php;

        location ~ \.php$ {
            root /usr/local/nginx/html;
            fastcgi_pass lnmp-php:9000;
            fastcgi_param script_filename /usr/share/nginx/html$fastcgi_script_name;
            include fastcgi_params;
            fastcgi_connect_timeout 60s;
            fastcgi_read_timeout 300s;
            fastcgi_send_timeout 300s;
        }
    }
---
apiversion: v1
kind: configmap
metadata:
  name: factory-config
  namespace: lnmp
data:
  default.conf: |-
    server {
        listen 80;
        server_name localhost;
        root /usr/share/nginx/html/jingtai_factory/backend/web;
        index index.php index.html index.htm default.php default.htm default.html;

        location ~ \.php$ {
            root /usr/share/nginx/html/jingtai_factory/backend/web;
            fastcgi_pass lnmp-php:9000;
            fastcgi_param script_filename /usr/share/nginx/html/jingtai_factory/backend/web$fastcgi_script_name;
            include fastcgi_params;
            fastcgi_connect_timeout 60s;
            fastcgi_read_timeout 300s;
            fastcgi_send_timeout 300s;
        }
        location /    {
                if (!-e $request_filename) {
                rewrite ^/(.*) /index.php last;
                break;
                }
        }
        access_log  /usr/share/nginx/html/factory.log;
        error_log  /usr/share/nginx/html/factory-err.log;
    }
---
apiversion: v1
kind: configmap
metadata:
  name: factory-front-config
  namespace: lnmp
data:
  default.conf: |-
    server {
        listen 80;
        server_name localhost;
        root /usr/share/nginx/html/jingtai_factory_frontend;
        index index.php index.html index.htm default.php default.htm default.html;

        location ~ \.php$ {
            root /usr/share/nginx/html/jingtai_factory_frontend;
            fastcgi_pass lnmp-php:9000;
            fastcgi_param script_filename /usr/share/nginx/html/jingtai_factory_frontend$fastcgi_script_name;
            include fastcgi_params;
            fastcgi_connect_timeout 60s;
            fastcgi_read_timeout 300s;
            fastcgi_send_timeout 300s;
        }
        location /    {
                if (!-e $request_filename) {
                rewrite ^/(.*) /index.html last;
                break;
        }
    }
    }
---
apiversion: v1
kind: configmap
metadata:
  name: factory-api-config
  namespace: lnmp
data:
  default.conf: |-
    server {
        listen 80;
        server_name localhost;
        root /usr/share/nginx/html/jingtai_factory/cloud;
        index index.php index.html index.htm default.php default.htm default.html;

        location ~ \.php$ {
            root /usr/share/nginx/html/jingtai_factory/cloud;
            fastcgi_pass lnmp-php:9000;
            fastcgi_param script_filename /usr/share/nginx/html/jingtai_factory/cloud$fastcgi_script_name;
            include fastcgi_params;
            fastcgi_connect_timeout 60s;
            fastcgi_read_timeout 300s;
            fastcgi_send_timeout 300s;
        }
        location /    {
                if (!-e $request_filename) {
                rewrite ^/(.*) /index.html last;
                break;
        }
    }
}

执行结果

[root@master nginx]# kubectl get pod
name                             ready   status    restarts   age
api-59c5b5ddbc-nbcb9             1/1     running   0          16h
factory-574c54f796-qzfnw         1/1     running   0          16h
factory-front-694779bbd8-55tgc   1/1     running   0          16h
lnmp-mysql-57445b5c4b-mpl62      1/1     running   0          16h
lnmp-php-5d7d5896b7-9sqtb        1/1     running   0          16h

ingress配置

[root@master ingress]# cat ingress-lnmp.yaml 
apiversion: networking.k8s.io/v1
kind: ingress
metadata:
  name: lnmp-ingress
  namespace: lnmp
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressclassname: nginx
  rules:
  - host: backend.k8s.com
    http:
      paths:
      - path: /
        pathtype: prefix
        backend:
          service:
            name: factory
            port:
              number: 80
  - host: api.k8s.com
    http:
      paths:
      - path: /
        pathtype: prefix
        backend:
          service:
            name: api
            port:
              number: 80
  - host: factory.k8s.com
    http:
      paths:
      - path: /
        pathtype: prefix
        backend:
          service:
            name: factory-front
            port:
              number: 80

[root@master ingress]# kubectl get ingress
name           class   hosts                                         address         ports   age
lnmp-ingress   nginx   backend.k8s.com,api.k8s.com,factory.k8s.com   10.99.132.137   80      16h

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持代码网。

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