k8s实战案例之运行dubbo微服务
生产者通过注册中心，将服务注册至注册中心，消费者通过注册中心找到生产者，从而实现消费者拿到生产者的实际地址，然后直接和生产者通信；管理端通过注册中心发现生产者和消费者，通过svc来管理生产者和消费者；集群外部客户端通过负载均衡器来访问集群内部服务；dubbo产生的数据可以通过pv/pvc将数据放置外部存储，如ceph,nas，nfs等；
1、dubbo微服务架构图
通过上述架构可以了解到，生产者通过注册中心，将服务注册至注册中心，消费者通过注册中心找到生产者，从而实现消费者拿到生产者的实际地址，然后直接和生产者通信；管理端通过注册中心发现生产者和消费者，通过svc来管理生产者和消费者；集群外部客户端通过负载均衡器来访问集群内部服务；dubbo产生的数据可以通过pv/pvc将数据放置外部存储，如ceph,nas，nfs等；
2、部署provider服务（生产者）
2.1、准备provider镜像
2.1.1、provider镜像数据目录文件
2.1.2、构建provider镜像Dockerfile
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider# cat Dockerfile
#Dubbo provider
FROM harbor.ik8s.cc/pub-images/jdk-base:v8.212
RUN yum install file nc -y
RUN mkdir -p /apps/dubbo/provider
ADD dubbo-demo-provider-2.1.5/ /apps/dubbo/provider
ADD run_java.sh /apps/dubbo/provider/bin
RUN chown nginx.nginx /apps -R
RUN chmod a+x /apps/dubbo/provider/bin/*.sh
CMD ["/apps/dubbo/provider/bin/run_java.sh"]
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider#
2.1.3、运行provider镜像脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider# cat run_java.sh
#!/bin/bash
#echo "nameserver 223.6.6.6" > /etc/resolv.conf
#/usr/share/filebeat/bin/filebeat -c /etc/filebeat/filebeat.yml -path.home /usr/share/filebeat -path.config /etc/filebeat -path.data /var/lib/filebeat -path.logs /var/log/filebeat &
su - nginx -c "/apps/dubbo/provider/bin/start.sh"
tail -f /etc/hosts
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider#
2.1.4、构建provider镜像脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider# cat build-command.sh
#!/bin/bash
#docker build -t harbor.ik8s.cc/magedu/dubbo-demo-provider:v1 .
#sleep 3
#docker push harbor.ik8s.cc/magedu/dubbo-demo-provider:v1
nerdctl build -t harbor.ik8s.cc/magedu/dubbo-demo-provider:v1 .
nerdctl push harbor.ik8s.cc/magedu/dubbo-demo-provider:v1
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider#
修改脚本权限
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider# chmod a+x dubbo-demo-provider-2.1.5/bin/*.sh
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider# ll dubbo-demo-provider-2.1.5/bin/*.sh
-rwxr-xr-x 1 root root 2165 Jun 22 2021 dubbo-demo-provider-2.1.5/bin/dump.sh*
-rwxr-xr-x 1 root root 49 Jun 22 2021 dubbo-demo-provider-2.1.5/bin/restart.sh*
-rwxr-xr-x 1 root root 413 Jun 22 2021 dubbo-demo-provider-2.1.5/bin/server.sh*
-rwxr-xr-x 1 root root 3227 Jun 22 2021 dubbo-demo-provider-2.1.5/bin/start.sh*
-rwxr-xr-x 1 root root 807 Jun 22 2021 dubbo-demo-provider-2.1.5/bin/stop.sh*
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/provider#
修改注册中心zookeeper地址
这个注册中心地址我们写zk节点的svc名称即可，如果是在同一名称空间下，直接写svc名称加端口即可，不在同一名称空间下，需要写svc名称.名称空间后面跟上端口即可；
构建provider镜像
2.2、运⾏provider服务
运行provider配置清单
kind: Deployment
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
metadata:
labels:
app: magedu-provider
name: magedu-provider-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels:
app: magedu-provider
template:
metadata:
labels:
app: magedu-provider
spec:
containers:
- name: magedu-provider-container
image: harbor.ik8s.cc/magedu/dubbo-demo-provider:v1
#command: ["/apps/tomcat/bin/run_tomcat.sh"]
#imagePullPolicy: IfNotPresent
imagePullPolicy: Always
ports:
- containerPort: 20880
protocol: TCP
name: http
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-provider
name: magedu-provider-spec
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 20880
#nodePort: 30001
selector:
app: magedu-provider
应用配置清单
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/provider# kubectl apply -f provider.yaml
deployment.apps/magedu-provider-deployment created
service/magedu-provider-spec created
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/provider#
2.3、验证provider服务
2.3.1、验证pod是否正常running？
2.3.2、zookeeper验证provider注册
3、部署consumer服务（消费者）
3.1、准备consumer镜像
3.1.1、consumer镜像数据目录文件
3.1.2、构建consumer镜像Dockerfile
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer# cat Dockerfile
#Dubbo consumer
FROM harbor.ik8s.cc/pub-images/jdk-base:v8.212
RUN yum install file -y
RUN mkdir -p /apps/dubbo/consumer
ADD dubbo-demo-consumer-2.1.5 /apps/dubbo/consumer
ADD run_java.sh /apps/dubbo/consumer/bin
RUN chown nginx.nginx /apps -R
RUN chmod a+x /apps/dubbo/consumer/bin/*.sh
CMD ["/apps/dubbo/consumer/bin/run_java.sh"]
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer#
3.1.3、运行consumer镜像脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer# cat run_java.sh
#!/bin/bash
#echo "nameserver 223.6.6.6" > /etc/resolv.conf
#/usr/share/filebeat/bin/filebeat -c /etc/filebeat/filebeat.yml -path.home /usr/share/filebeat -path.config /etc/filebeat -path.data /var/lib/filebeat -path.logs /var/log/filebeat &
su - nginx -c "/apps/dubbo/consumer/bin/start.sh"
tail -f /etc/hosts
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer#
3.1.4、构建consumer镜像脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer# cat build-command.sh
#!/bin/bash
#docker build -t harbor.ik8s.cc/magedu/dubbo-demo-consumer:v1 .
#sleep 3
#docker push harbor.ik8s.cc/magedu/dubbo-demo-consumer:v1
nerdctl build -t harbor.ik8s.cc/magedu/dubbo-demo-consumer:v1 .
nerdctl push harbor.ik8s.cc/magedu/dubbo-demo-consumer:v1
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer#
修改脚本权限
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer# chmod a+x dubbo-demo-consumer-2.1.5/bin/*.sh
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer# ll dubbo-demo-consumer-2.1.5/bin/*.sh
-rwxr-xr-x 1 root root 2165 Jun 22 2021 dubbo-demo-consumer-2.1.5/bin/dump.sh*
-rwxr-xr-x 1 root root 49 Jun 22 2021 dubbo-demo-consumer-2.1.5/bin/restart.sh*
-rwxr-xr-x 1 root root 413 Jun 22 2021 dubbo-demo-consumer-2.1.5/bin/server.sh*
-rwxr-xr-x 1 root root 3227 Jun 22 2021 dubbo-demo-consumer-2.1.5/bin/start.sh*
-rwxr-xr-x 1 root root 807 Jun 22 2021 dubbo-demo-consumer-2.1.5/bin/stop.sh*
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/consumer#
修改注册中心zookeeper地址
构建consumer镜像
3.2、运行consumer服务
运行comsumer配置清单
kind: Deployment
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
metadata:
labels:
app: magedu-consumer
name: magedu-consumer-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels:
app: magedu-consumer
template:
metadata:
labels:
app: magedu-consumer
spec:
containers:
- name: magedu-consumer-container
image: harbor.ik8s.cc/magedu/dubbo-demo-consumer:v1
#command: ["/apps/tomcat/bin/run_tomcat.sh"]
#imagePullPolicy: IfNotPresent
imagePullPolicy: Always
ports:
- containerPort: 80
protocol: TCP
name: http
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-consumer
name: magedu-consumer-server
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 80
#nodePort: 30001
selector:
app: magedu-consumer
应用配置清单
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/consumer# kubectl apply -f consumer.yaml
deployment.apps/magedu-consumer-deployment created
service/magedu-consumer-server created
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/consumer#
3.3、验证consumer服务
3.3.1、验证pod是否正常running？
3.3.2、zookeeper验证consumer注册
3.3.3、验证consumer调用provider
可以看到consumer通过注册中心找到了provider；
3.3.4、增加consumer副本数量看看对应consumer是否能够正常找到provide？
增加consumer副本
应用配置清单
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/consumer# kubectl apply -f consumer.yaml
deployment.apps/magedu-consumer-deployment configured
service/magedu-consumer-server unchanged
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/consumer# kubectl get pods -n magedu
NAME READY STATUS RESTARTS AGE
magedu-consumer-deployment-798c7d785b-fp4b9 1/1 Running 0 26s
magedu-consumer-deployment-798c7d785b-wmv9p 1/1 Running 0 18m
magedu-consumer-deployment-798c7d785b-zqm74 1/1 Running 0 26s
magedu-provider-deployment-6fccc6d9f5-nl4zd 1/1 Running 0 73m
mysql-0 2/2 Running 6 (97m ago) 56d
mysql-1 2/2 Running 6 (97m ago) 56d
mysql-2 2/2 Running 6 (97m ago) 56d
redis-0 1/1 Running 5 (97m ago) 65d
redis-1 1/1 Running 5 (97m ago) 65d
redis-2 1/1 Running 5 (97m ago) 65d
redis-3 1/1 Running 5 (97m ago) 65d
redis-4 1/1 Running 5 (97m ago) 65d
redis-5 1/1 Running 5 (97m ago) 65d
ubuntu1804 0/1 Completed 0 65d
zookeeper1-675c5477cb-vmwwq 1/1 Running 7 (97m ago) 67d
zookeeper2-759fb6c6f-7jktr 1/1 Running 7 (97m ago) 67d
zookeeper3-5c78bb5974-vxpbh 1/1 Running 7 (97m ago) 67d
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/consumer#
查看provider日志
在provider中看日志，可以看到有3个consumer在调用provider,这说明consumer通过注册中兴可以正常发现provider，然后和provider正常通信；
3.3.5、增加provider副本，看看consumer是否能够找到多个provider?
增加provider副本
应用配置清单
查看任意一个consumer日志
可以看到provider副本增加，consumer也可以通过注册中心发现provider；
在注册中心zookeeper查看consumer和provider情况
可以看到多副本的provider和多副本consumer都正常注册到zookeeper；
4、部署dubbo admin
4.1、dubbo admin镜像准备
4.1.1、dubbo admin镜像数据目录文件
4.1.2、构建dubbo admin镜像Docerfile
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin# cat Dockerfile
#Dubbo dubboadmin
#FROM harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43
FROM harbor.ik8s.cc/pub-images/tomcat-base:v8.5.43
RUN yum install unzip -y
ADD server.xml /apps/tomcat/conf/server.xml
ADD logging.properties /apps/tomcat/conf/logging.properties
ADD catalina.sh /apps/tomcat/bin/catalina.sh
ADD run_tomcat.sh /apps/tomcat/bin/run_tomcat.sh
ADD dubboadmin.war /data/tomcat/webapps/dubboadmin.war
RUN cd /data/tomcat/webapps && unzip dubboadmin.war && rm -rf dubboadmin.war && chown -R nginx.nginx /data /apps
EXPOSE 8080 8443
CMD ["/apps/tomcat/bin/run_tomcat.sh"]
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin#
4.1.3、运行dubbo admin镜像脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin# cat run_tomcat.sh
#!/bin/bash
su - nginx -c "/apps/tomcat/bin/catalina.sh start"
su - nginx -c "tail -f /etc/hosts"
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin#
4.1.4、构建dubbo admin镜像脚本
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin# cat build-command.sh
#!/bin/bash
TAG=$1
#docker build -t harbor.ik8s.cc/magedu/dubboadmin:${TAG} .
#sleep 3
#docker push harbor.ik8s.cc/magedu/dubboadmin:${TAG}
nerdctl build -t harbor.ik8s.cc/magedu/dubboadmin:${TAG} .
nerdctl push harbor.ik8s.cc/magedu/dubboadmin:${TAG}
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin#
修改注册中心zookeeper地址
打包dubboadmin文件夹为dubboadmin.war
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin# zip -rmq dubboadmin.war dubboadmin/*
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin# ll
total 54312
drwxr-xr-x 2 root root 4096 Aug 11 05:32 ./
drwxr-xr-x 5 root root 4096 Aug 9 2022 ../
-rw-r--r-- 1 root root 575 Aug 11 05:17 Dockerfile
-rwxr-xr-x 1 root root 257 Aug 11 05:20 build-command.sh*
-rwxr-xr-x 1 root root 22201 Jun 22 2021 catalina.sh*
-rw-r--r-- 1 root root 27778001 Aug 11 05:32 dubboadmin.war
-rw-r--r-- 1 root root 27777984 Jun 22 2021 dubboadmin.war.bak
-rw-r--r-- 1 root root 3436 Jun 22 2021 logging.properties
-rwxr-xr-x 1 root root 99 Jun 22 2021 run_tomcat.sh*
-rw-r--r-- 1 root root 6427 Jun 22 2021 server.xml
root@k8s-master01:~/k8s-data/dockerfile/web/magedu/dubbo/dubboadmin#
运行构建脚本构建dubboadmin镜像
4.2、运行dubbo admin
dubboadmin配置清单
kind: Deployment
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
metadata:
labels:
app: magedu-dubboadmin
name: magedu-dubboadmin-deployment
namespace: magedu
spec:
replicas: 1
selector:
matchLabels:
app: magedu-dubboadmin
template:
metadata:
labels:
app: magedu-dubboadmin
spec:
containers:
- name: magedu-dubboadmin-container
image: harbor.ik8s.cc/magedu/dubboadmin:v1
#imagePullPolicy: IfNotPresent
imagePullPolicy: Always
ports:
- containerPort: 8080
protocol: TCP
name: http
---
kind: Service
apiVersion: v1
metadata:
labels:
app: magedu-dubboadmin
name: magedu-dubboadmin-service
namespace: magedu
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: 8080
nodePort: 31080
selector:
app: magedu-dubboadmin
应用配置清单
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/dubboadmin# kubectl apply -f dubboadmin.yaml
deployment.apps/magedu-dubboadmin-deployment created
service/magedu-dubboadmin-service created
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/dubboadmin# kubectl get pods -n magedu
NAME READY STATUS RESTARTS AGE
magedu-consumer-deployment-798c7d785b-fp4b9 1/1 Running 0 41m
magedu-consumer-deployment-798c7d785b-wmv9p 1/1 Running 0 60m
magedu-consumer-deployment-798c7d785b-zqm74 1/1 Running 0 41m
magedu-dubboadmin-deployment-798c4dfdd8-kvfvh 1/1 Running 0 49s
magedu-provider-deployment-6fccc6d9f5-k6z7m 1/1 Running 0 33m
magedu-provider-deployment-6fccc6d9f5-nl4zd 1/1 Running 0 115m
magedu-provider-deployment-6fccc6d9f5-p94rb 1/1 Running 0 33m
mysql-0 2/2 Running 6 (138m ago) 56d
mysql-1 2/2 Running 6 (138m ago) 56d
mysql-2 2/2 Running 6 (138m ago) 56d
redis-0 1/1 Running 5 (138m ago) 65d
redis-1 1/1 Running 5 (138m ago) 65d
redis-2 1/1 Running 5 (138m ago) 65d
redis-3 1/1 Running 5 (138m ago) 65d
redis-4 1/1 Running 5 (138m ago) 65d
redis-5 1/1 Running 5 (138m ago) 65d
ubuntu1804 0/1 Completed 0 65d
zookeeper1-675c5477cb-vmwwq 1/1 Running 7 (138m ago) 67d
zookeeper2-759fb6c6f-7jktr 1/1 Running 7 (138m ago) 67d
zookeeper3-5c78bb5974-vxpbh 1/1 Running 7 (138m ago) 67d
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/dubboadmin# kubectl get svc -n magedu
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
magedu-consumer-server NodePort 10.100.208.121 <none> 80:49630/TCP 61m
magedu-dubboadmin-service NodePort 10.100.244.92 <none> 80:31080/TCP 2m11s
magedu-provider-spec NodePort 10.100.187.168 <none> 80:44873/TCP 116m
mysql ClusterIP None <none> 3306/TCP 56d
mysql-read ClusterIP 10.100.15.127 <none> 3306/TCP 56d
redis ClusterIP None <none> 6379/TCP 65d
redis-access NodePort 10.100.117.185 <none> 6379:36379/TCP 65d
zookeeper ClusterIP 10.100.237.95 <none> 2181/TCP 67d
zookeeper1 NodePort 10.100.63.118 <none> 2181:32181/TCP,2888:30541/TCP,3888:31200/TCP 67d
zookeeper2 NodePort 10.100.199.43 <none> 2181:32182/TCP,2888:32670/TCP,3888:32264/TCP 67d
zookeeper3 NodePort 10.100.41.9 <none> 2181:32183/TCP,2888:31329/TCP,3888:32546/TCP 67d
root@k8s-master01:~/k8s-data/yaml/magedu/dubbo/dubboadmin#
4.3、在dubbo admin web验证provider和consumer
登录dubboadmin web
在dubboadmin web查看provider和consumer
作者：Linux-1874
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