我想用Kubernetes创建一个示例应用程序,但是如果我尝试连接到Kubernetes中的响应服务,我会被拒绝连接。
例如,如果我从另一个Pod连接到http://random-generator-svc:5050/,则会收到一条错误消息,提示连接被拒绝。
这是为随机生成器创建服务和部署的yaml文件:
apiVersion: v1
kind: Service
metadata:
name: random-generator-svc
labels:
app: rand-gen
spec:
selector:
app: rand-gen
type: NodePort
ports:
- protocol: "TCP"
port: 5050
targetPort: 5050
name: http
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: random-generator-deployment
labels:
app: rand-gen
spec:
replicas: 2
selector:
matchLabels:
app: rand-gen
template:
metadata:
labels:
app: rand-gen
spec:
containers:
- name: random-generator-container
image: toky03/random-generator-image:1.2
ports:
- containerPort: 5050
这是yaml文件,用于指定“呼叫者”应用程序的服务和部署:
apiVersion: v1
kind: Service
metadata:
name: middle-tier-svc
labels:
app: rand-gen
spec:
selector:
app: rand-gen
type: NodePort
ports:
- protocol: "TCP"
port: 7070
targetPort: 7070
name: http
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: middle-tier-controller
labels:
app: rand-gen
spec:
replicas: 1
selector:
matchLabels:
app: rand-gen
template:
metadata:
labels:
app: rand-gen
spec:
containers:
- name: random-controller-container
image: toky03/random-controller-image:1.2
ports:
- containerPort: 7070
我将类型更改为NodePort
,以尝试是否还存在该错误,但是我可以从集群外部访问该服务。我的Kubernetes DNS解析器可能有问题吗?
非常感谢您的帮助。
答案 0 :(得分:1)
默认情况下,kubernetes创建一个虚拟代理。端口转发后即可访问服务。
kubectl port-forward svc random-generator-svc 5050:5050
答案 1 :(得分:0)
那是因为您的yaml缩进略有错别字。试试这个
apiVersion: v1
kind: Service
metadata:
name: random-generator-svc
labels:
app: rand-gen
spec:
selector:
app: rand-gen
type: NodePort
ports:
- protocol: "TCP"
port: 5050
targetPort: 5050
name: http
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: random-generator-deployment
labels:
app: rand-gen
spec:
replicas: 2
selector:
matchLabels:
app: rand-gen
template:
metadata:
labels:
app: rand-gen
spec:
containers:
- name: random-generator-container
image: toky03/random-generator-image:1.2
ports:
- containerPort: 5050
如果只希望将应用程序公开到群集中,则只需删除type: NodePort
,例如:
apiVersion: v1
kind: Service
metadata:
name: random-generator-svc
labels:
app: rand-gen
spec:
selector:
app: rand-gen
ports:
- protocol: "TCP"
port: 5050
targetPort: 5050
name: http
答案 2 :(得分:0)
尝试“http://random-generator-svc.default.svc.cluster.local:5050”。 如果您使用任何命名空间,您可以将“默认”替换为命名空间。