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我有两个映射到两个服务并使用我的笔记本电脑上的虚拟框虚拟机运行的服务。我有kube dns工作。一个pod是一个web服务，另一个是mongodb。Kubernetes服务沟通isse - Kubedns
web应用荚的该规范是下面
spec:
containers:
- resources:
limits:
cpu: 0.5
.
.
name: wsemp
ports:
- containerPort: 8080
# name: wsemp
#command: ["java","-Dspring.data.mongodb.uri=mongodb://192.168.6.103:30061/microservices", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
command: ["java","-Dspring.data.mongodb.uri=mongodb://mongoservice/microservices", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
相应服务的规范
apiVersion: v1
kind: Service
metadata:
labels:
name: webappservice
name: webappservice
spec:
ports:
- port: 8080
nodePort: 30062
targetPort: 8080
protocol: TCP
type: NodePort
selector:
name: webapp
MongoDB的荚果规格
apiVersion: v1
kind: Pod
metadata:
name: mongodb
labels:
name: mongodb
spec:
containers:
.
.
name: mongodb
ports:
- containerPort: 27017
MongoDB的服务规范
apiVersion: v1
kind: Service
metadata:
labels:
name: mongodb
name: mongoservice
spec:
ports:
- port: 27017
nodePort: 30061
targetPort: 27017
protocol: TCP
type: NodePort
selector:
name: mongodb
在服务网点更新的目标端口后评论
问题
的web应用程序在启动时不能够与mongoservice端口连接，并给出了这个错误在启动
Exception in monitor thread while connecting to server mongoservice:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.connection.SocketStream.open(SocketStream.java:63) ~[mongodb-driver-core-3.2.2.jar!/:na]
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:114) ~[mongodb-driver-core-3.2.2.jar!/:na]
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:128) ~[mongodb-driver-core-3.2.2.jar!/:na]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_111]
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_111]
描述SVC
kubectl describe svc mongoservice
Name: mongoservice
Namespace: default
Labels: name=mongodb
Selector: name=mongodb
Type: NodePort
IP: 10.254.146.189
Port: <unset> 27017/TCP
NodePort: <unset> 30061/TCP
Endpoints: 172.17.99.2:27017
Session Affinity: None
No events.
kubectl describe svc webappservice
Name: webappservice
Namespace: default
Labels: name=webappservice
Selector: name=webapp
Type: NodePort
IP: 10.254.112.121
Port: <unset> 8080/TCP
NodePort: <unset> 30062/TCP
Endpoints: 172.17.99.3:8080
Session Affinity: None
No events.
调试
[email protected]:/# nslookup mongoservice
Server: 10.254.0.2
Address: 10.254.0.2#53
Non-authoritative answer:
Name: mongoservice.default.svc.cluster.local
Address: 10.254.146.189
[email protected]:/# curl 10.254.146.189:27017
curl: (7) Failed to connect to 10.254.146.189 port 27017: Connection refused
[email protected]:/# curl mongoservice:27017
curl: (7) Failed to connect to mongoservice port 27017: Connection refused
sudo iptables-save | grep webapp
-A KUBE-NODEPORTS -p tcp -m comment --comment "default/webappservice:" -m tcp --dport 30062 -j KUBE-MARK-MASQ
-A KUBE-NODEPORTS -p tcp -m comment --comment "default/webappservice:" -m tcp --dport 30062 -j KUBE-SVC-NQBDRRKQULANV7O3
-A KUBE-SEP-IE7EBTQCN7T6HXC4 -s 172.17.99.3/32 -m comment --comment "default/webappservice:" -j KUBE-MARK-MASQ
-A KUBE-SEP-IE7EBTQCN7T6HXC4 -p tcp -m comment --comment "default/webappservice:" -m tcp -j DNAT --to-destination 172.17.99.3:8080
-A KUBE-SERVICES -d 10.254.217.24/32 -p tcp -m comment --comment "default/webappservice: cluster IP" -m tcp --dport 8080 -j KUBE-SVC-NQBDRRKQULANV7O3
-A KUBE-SVC-NQBDRRKQULANV7O3 -m comment --comment "default/webappservice:" -j KUBE-SEP-IE7EBTQCN7T6HXC4
$ curl 10.254.217.24:8080
{"timestamp":1486678423757,"status":404,"error":"Not Found","message":"No message available","path":"/"}[[email protected] ~]$
sudo iptables-save | grep mongodb
[[email protected] ~]$ sudo iptables-save | grep mongo
-A KUBE-NODEPORTS -p tcp -m comment --comment "default/mongoservice:" -m tcp --dport 30061 -j KUBE-MARK-MASQ
-A KUBE-NODEPORTS -p tcp -m comment --comment "default/mongoservice:" -m tcp --dport 30061 -j KUBE-SVC-2HQWGC3WSIBZF7CN
-A KUBE-SEP-FVWOWAWXXVAVIQ5O -s 172.17.99.2/32 -m comment --comment "default/mongoservice:" -j KUBE-MARK-MASQ
-A KUBE-SEP-FVWOWAWXXVAVIQ5O -p tcp -m comment --comment "default/mongoservice:" -m tcp -j DNAT --to-destination 172.17.99.2:27017
-A KUBE-SERVICES -d 10.254.146.189/32 -p tcp -m comment --comment "default/mongoservice: cluster IP" -m tcp --dport 27017 -j KUBE-SVC-2HQWGC3WSIBZF7CN
-A KUBE-SVC-2HQWGC3WSIBZF7CN -m comment --comment "default/mongoservice:" -j KUBE-SEP-FVWOWAWXXVAVIQ5O
[[email protected] ~]$ sudo curl 10.254.146.189:8080
^C[[email protected] ~]$ sudo curl 10.254.146.189:27017
It looks like you are trying to access MongoDB over HTTP on the native driver port.
[email protected]:/# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN
tcp 0 0 172.17.99.2:60724 151.101.128.204:80 TIME_WAIT
tcp 0 0 172.17.99.2:60728 151.101.128.204:80 TIME_WAIT
MongoDB的容器具有在启动时没有错误。
试图按照https://kubernetes.io/docs/user-guide/debugging-services/#iptables中的步骤操作，因为我不知道该怎么做，所以卡在“尝试重新启动kube-proxy并将-V标志设置为4”的部分。
我不是网络人，所以不知道如何以及需要分析什么。任何类型的调试提示都会有很大的帮助。
感谢。
在webappservice和mongoservice中对NodePorts进行了评论，并且尝试过，因为它与虚拟框vms中的内部网络通信有关。端口： - 端口：27017 ＃nodePort：30061 targetPort：27017 protocol：TCP ＃type：NodePort。仍遇到相同的错误。 。 – Vikram