k8s经典实战—搭建WordPress
k8s经典实战—搭建WordPress
说明：需要在k8s上部署lnmp环境，建议跟着步骤来端⼝最好不要改，希望你也能搭建成功，完成这个搭建后你对Kubernetes的技术基本上是⼊门了。⾸先看下效果图：
⼀、部署存储⽤户持久化存储
fdisk -l
fdisk /dev/vdb
mkdir /u01
pvcreate /dev/vdb1
vgcreate vg0 /dev/vdb1
lvcreate -L 99G -n oralv vg0
<4 /dev/vg0/oralv
mount /dev/vg0/oralv /u01/
echo "/dev/vg0/oralv                  /u01                      ext4    defaults        0 0" >>/etc/fstab
⽤df -h 命令查看：
2、搭建NFS共享存储
2.1 nfs服务端
yum install nfs-utils -y
mkdir -pv /u01/nps/volumes
vim /etc/exports
/u01/nps/volumes    172.31.182.0/24(rw,no_root_squash)
systemctl start nfs
查看服务是否开启
2.2 创建nps挂载⽬录
mkdir -pv /u01/nps/volumes/data{mysql,nginx}
2.3 nfs客户端(k8s的node节点都需要安装)
yum install nfs-utils -y
#验证是否可以访问nfs服务端
[root@node01 ~]# showmount -e 172.31.182.145
Export list for 172.31.182.145:
/u01/nps/volumes 172.31.182.0/24
[root@node01 ~]# mount -t nfs 172.31.182.145:/u01/nps/volumes /mnt
echo "172.31.182.145:/u01/nps/volumes                  /mnt                      nfs    defaults        0 0" >>/etc/fstab
⼆、创建pv
[root@master Dockerfile-lnmp]# cat pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: mysql-pv
spec:
capacity:
storage: 20Gi
accessModes:
- ReadWriteMany
nfs:
path: /u01/nps/volumes/data/mysql
server: 172.31.182.145
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: wp-pv01
spec:
capacity:
storage: 5Gi
accessModes:
-
ReadWriteMany
nfs:
path: /u01/nps/volumes/data/nginx
server: 172.31.182.145
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: wp-pv02
spec:
capacity:
storage: 5Gi
accessModes:
- ReadWriteMany
nfs:
path: /u01/nps/volumes/data/nginx
server: 172.31.182.145
创建pv：
kubectl apply -f pv.yaml
三、部署mysql
3.1 创建mysql-deployment
[root@master Dockerfile-lnmp]# cat mysql-deployment.yaml apiVersion: v1
kind: Service
metadata:
name: wordpress-mysql
labels:
app: wordpress
spec:
ports:
- port: 3306
selector:
app: wordpress
tier: mysql
-
--
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql-pv-claim
labels:
app: wordpress
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 20Gi
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: wordpress-mysql
labels:
app: wordpress
spec:
selector:
matchLabels:
app: wordpress
tier: mysql
strategy:
type: Recreate
template:
metadata:
labels:
app: wordpress
nodeselectortier: mysql
spec:
containers:
- name: mysql
spec:
containers:
- name: mysql
image: mysql:5.6
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-pass
key: password
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- mountPath: "/var/lib/mysql"
name: mysql-data
volumes:
- name: mysql-data
persistentVolumeClaim:
claimName: mysql-pv-claim
创建mysql容器：
kubectl apply -f mysql-deployment.yaml
3.2 通过secret创建mysql密码
kubectl create secret generic mysql-pass --from-literal=password=123456
四、上传镜像到Harbor
4.1 构建nginx镜像并上传
[root@master nginx]# docker build -t 172.31.182.143/dev/nginx:latest .
[root@master nginx]# docker push 172.31.182.143/dev/nginx:latest
4.2 构建php镜像并上传
[root@master php]# docker build -t 172.31.182.143/dev/php:latest .
[root@master php]# docker push 172.31.182.143/dev/php:latest
4.3 kubernetes配置Harbor仓库
kubectl create secret docker-registry regcred --docker-server=172.31.182.143 --docker-username=admin --docker-password=Harbor%12345 --docker-email=admin@qq
注意！！上述由于没有指定namespace默认会在default命名空间下创建secret，如果是别的ns需在后⾯指定如：-n test 否则test命名空间下的pod仍然⽆法拉取私有仓库镜像。
五、部署php环境
5.1 创建php-deployment
[root@master Dockerfile-lnmp]# cat php-deployment.yaml
apiVersion: v1
kind: Service
metadata:
name: wordpress-php
labels:
app: wordpress
spec:
ports:
- port: 9000
selector:
app: wordpress-php
tier: frontend
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: wp-pvc01
labels:
app: wordpress
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 5Gi
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: wordpress-php
labels:
app: wordpress
spec:
replicas: 3
selector:
matchLabels:
app: wordpress-php
tier: frontend
strategy:
type: Recreate
template:
metadata:
labels:
app: wordpress-php
tier: frontend
spec:
imagePullSecrets:
- name: regcred
containers:
- name: php
image: 172.31.182.143/dev/php:latest
ports:
- containerPort: 9000
name: wordpress
volumeMounts:
- name: php-data
mountPath: "/usr/local/nginx/html"
volumes:
- name: php-data
persistentVolumeClaim:
claimName: wp-pvc01
注意：在yaml⽂件中需加⼊secret⽤于访问镜像仓库。
imagePullSecrets:
- name: regcred
创建php容器：
kubectl apply -f php-deployment.yaml
六、部署nginx环境
6.1 创建nginx-deployment
[root@master Dockerfile-lnmp]# cat nginx-deployment.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx-wp-config
data:
server {
listen 80;
server_name localhost;
root html;
index index.php index.html;
location ~ \.php$ {
root html;
fastcgi_pass wordpress-php:9000;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;            include fastcgi_params;
}
}
---
apiVersion: v1
kind: Service
metadata:
name: wordpress-nginx
labels:
app: wordpress
spec:
ports:
- port: 80
selector:
app: wordpress-nginx
tier: frontend
type: NodePort
sessionAffinity: ClientIP
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: wp-pvc02
labels:
app: wordpress
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 5Gi
-
--
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: wordpress-nginx
labels:
app: wordpress
spec:
replicas: 3
selector:
matchLabels:
app: wordpress-nginx
tier: frontend
strategy:
type: Recreate
template:
metadata:
labels:
app: wordpress-nginx
tier: frontend
spec:
imagePullSecrets:
-
name: regcred
containers:
- name: nginx
image: 172.31.182.143/dev/nginx:latest
ports:
- containerPort: 80
name: wordpress
volumeMounts:
- mountPath: "/usr/local/nginx/html"
name: nginx-data
- mountPath: "/usr/local/nginx/conf/f"
name: config
subPath: f
volumes:
- name: nginx-data
persistentVolumeClaim:
claimName: wp-pvc02
- name: config
configMap:
name: nginx-wp-config
创建nginx容器：
kubectl apply -f nginx-deployment.yaml
七、查看pod,svc,pv,pvc,secret的状态
7.1 kubectl get pod
7.2 kubectl get svc
我这⾥wordpress-nginx的NodePort随机⽣成是47074，访问时改为你们⾃⼰⽣成的即可！！
7.3 kubectl get pv,pvc
7.4  kubectl get secret