kubernetes实践(七)Kubernetes实战
一.
1.创建wordpress命名空间
kubectl create namespace wordpress
2.根据wordpress-db.yaml创建资源
wordpress-db.yaml文件
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: mysql-deploy
namespace: wordpress
labels:
app: mysql
spec:
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.6
imagePullPolicy: IfNotPresent
ports:
- containerPort: 3306
name: dbport
env:
- name: MYSQL_ROOT_PASSWORD
value: rootPassW0rd
- name: MYSQL_DATABASE
value: wordpress
- name: MYSQL_USER
value: wordpress
- name: MYSQL_PASSWORD
value: wordpress
volumeMounts:
- name: db
mountPath: /var/lib/mysql
volumes:
- name: db
hostPath:
path: /var/lib/mysql
---
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: wordpress
spec:
selector:
app: mysql
ports:
- name: mysqlport
protocol: TCP
port: 3306
targetPort: dbport
创建命令
kubectl apply -f wordpress-db.yaml
查询
kubectl get pods -n wordpress kubectl get svc mysql -n wordpress kubectl describe svc mysql -n wordpress
3.根据wordpress.yaml创建资源
wordpress.yaml文件
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: wordpress-deploy
namespace: wordpress
labels:
app: wordpress
spec:
template:
metadata:
labels:
app: wordpress
spec:
containers:
- name: wordpress
image: wordpress
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
name: wdport
env:
- name: WORDPRESS_DB_HOST
value: 192.168.199.101:3306
- name: WORDPRESS_DB_USER
value: wordpress
- name: WORDPRESS_DB_PASSWORD
value: wordpress
---
apiVersion: v1
kind: Service
metadata:
name: wordpress
namespace: wordpress
spec:
type: NodePort
selector:
app: wordpress
ports:
- name: wordpressport
protocol: TCP
port: 80
targetPort: wdport
创建
kubectl apply -f wordpress.yaml #修改其中mysql的ip地址,其实也可以使用service的name:mysql
查询
kubectl get pods -n wordpress kubectl get svc -n wordpress # 获取到转发后的端口，如31969
4.访问测试
访问集群中任意宿主机节点的IP:31969,如http://192.168.50.14:31969/
二.
1.准备Spring Boot项目cicd-demo镜像
(1)创建Controller
@RestController
public class TestController {
@RequestMapping
public String show(){
return "Hello cicd";
}
}
(2)pom文件配置docker-maven-plugin插件
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>1.1.1</version>
<configuration>
<imageName>registry.cn-hangzhou.aliyuncs.com/xxx/${project.name}</imageName>
<dockerHost>http://127.0.0.1:2375</dockerHost>
<baseImage>anapsix/alpine-java</baseImage>
<entryPoint>["java","-jar","/${project.build.finalName}.jar"]</entryPoint>
<resources>
<resource>
<targetPath>/</targetPath>
<directory>${project.build.directory}</directory>
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
(3)打包推送镜像到私有仓库
mvn clean package docker:build -DpushImage -DskipTests
2.部署镜像到Kubernetes
(1)创建cicd-demo命名空间
kubectl create namespace cicd-demo
(2)创建私有仓库密钥
kubectl -n cicd-demo create secret docker-registry aliyun-key \ --docker-server=registry.cn-hangzhou.aliyuncs.com \ [email protected] \ --docker-password=xxxxxx \ [email protected]
(3)编写Kubernetes配置文件
apiVersion: apps/v1
kind: Deployment
metadata:
name: cicd-demo
namespace: cicd-demo
spec:
selector:
matchLabels:
app: cicd-demo
replicas: 1
template:
metadata:
labels:
app: cicd-demo
spec:
imagePullSecrets:
- name: aliyun-key
containers:
- name: cicd-demo
image: registry.cn-hangzhou.aliyuncs.com/xxx/cicd-demo:1.1
ports:
- containerPort: 8090
---
# 创建Pod的Service
apiVersion: v1
kind: Service
metadata:
name: cicd-demo
namespace: cicd-demo
spec:
ports:
- port: 80
protocol: TCP
targetPort: 8090
selector:
app: cicd-demo
---
# 创建Ingress，定义访问规则，一定要记得提前创建好nginx ingress controller
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: cicd-demo
namespace: cicd-demo
spec:
rules:
- host: cicd.demo.xxx.com
http:
paths:
- path: /
backend:
serviceName: cicd-demo
servicePort: 80
注意imagePullSecrets 定义拉取私有仓库到密钥
(4)创建Kubernetes资源
kubectl apply -f cicd-demo.yaml
(5)查看资源
#pod kubectl get pods -o wide -n cicd-demo #service kubectl get svc -n cicd-demo
(6)访问pod测试
curl pod_id:8090/
(7)配置hosts文件
192.168.50.15 cicd.demo.xxx.com
(8)浏览器访问测试
http://cicd.demo.xxx.com
三.
1.准备nacos服务
01 下载nacos-server-1.2.0-beta.1.tar.gz到服务器192.168.1.100:/usr/local/nacos 02 解压：tar -zxvf 03 进入到bin目录执行：sh startup.sh -m standalone [需要有java环境的支持] 04 浏览器访问：192.168.1.100:8848/nacos
2.准备两个Spring Boot项目，名称为user和order，表示两个服务
(1)项目配置
pom文件
<!--引入nacos client依赖-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!--引入docker-maven-plugin插件-->
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>1.1.1</version>
....
</plugin>
user项目配置文件application.yml
spring:
cloud:
nacos:
discovery:
server-addr: 192.168.1.100:8848
application:
name: user
server:
port: 8080
user项目Controller文件
@RestController
@RequestMapping("/user")
public class TestController {
@Autowired
private DiscoveryClient discoveryClient;
@RequestMapping("/test")
public List<ServiceInstance> findServiceInstance() throws Exception{
//查询指定服务名称下的所有实例的信息
List<ServiceInstance> list=this.discoveryClient.getInstances("order");
ServiceInstance serviceInstance=list.get(0);
URI uri = serviceInstance.getUri();
System.out.println(uri.toString());
this.testUrl(uri.toString());
return list;
}
public void testUrl(String urlString){
URL url;
try {
url = new URL(urlString);
URLConnection co = url.openConnection();
co.connect();
System.out.println("连接可用");
} catch (Exception e1) {
System.out.println("连接打不开!");
url = null;
}
}
}
order项目配置文件
spring:
cloud:
nacos:
discovery:
server-addr: 192.168.1.100:8848
application:
name: order
server:
port: 9090
(2)打包推送user和order镜像到私有仓库
mvn clean package docker:build -DpushImage -DskipTests
(3)编写Kubernetes配置文件
user.yaml文件
apiVersion: apps/v1
kind: Deployment
metadata:
name: user
namespace: nacos-demo
spec:
selector:
matchLabels:
app: user
replicas: 1
template:
metadata:
labels:
app: user
spec:
imagePullSecrets:
- name: aliyun-key
containers:
- name: user
image: registry.cn-hangzhou.aliyuncs.com/xxx/user:0.0.1-SNAPSHOT
ports:
- containerPort: 8080
---
# 创建Pod的Service
apiVersion: v1
kind: Service
metadata:
name: user
namespace: nacos-demo
spec:
ports:
- port: 80
protocol: TCP
targetPort: 8080
selector:
app: user
---
# 创建Ingress，定义访问规则，一定要记得提前创建好nginx ingress controller
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: user
namespace: nacos-demo
spec:
rules:
- host: user.demo.xxx.com
http:
paths:
- path: /
backend:
serviceName: user
servicePort: 80
order.yaml文件
apiVersion: apps/v1
kind: Deployment
metadata:
name: order
namespace: nacos-demo
spec:
selector:
matchLabels:
app: order
replicas: 1
template:
metadata:
labels:
app: order
spec:
imagePullSecrets:
- name: aliyun-key
containers:
- name: order
image: registry.cn-hangzhou.aliyuncs.com/xxx/order:0.0.1-SNAPSHOT
ports:
- containerPort: 8080
---
# 创建Pod的Service
apiVersion: v1
kind: Service
metadata:
name: order
namespace: nacos-demo
spec:
ports:
- port: 80
protocol: TCP
targetPort: 9090
selector:
app: order
(4)创建Kubernetes资源
kubectl create namespace nacos-demo kubectl apply -f user.yaml kubectl apply -f order.yaml
(5)查看Kubernetes资源
kubectl get pods -o wide -n nacos-demo kubectl get svc -o wide -n nacos-demo kubectl get ingress -o wide -n nacos-demo
(6)访问测试
配置hosts文件
192.168.50.15 user.demo.xxx.com
# 01 集群内
curl user-pod-ip:8080/user/test
kubectl logs -f <pod-name> -c <container-name>
[主要是为了看日志输出，证明user能否访问order]
# 02 集群外，比如浏览器，可以把集群中原来的ingress删除掉
http://user.demo.xxx.com/user/test