我正在尝试在一个部署中复制带有两个docker映像的Name based virtual hosting。不幸的是,由于端口冲突,我只能运行1个:
2019/03/19 20:37:52 [ERR] Error starting server: listen tcp :5678: bind: address already in use
作为同一部署的一部分,真的不可能让两个映像在同一端口上侦听吗?还是我在其他地方出错?
从here改编而成的最小示例
# set up ingress
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/mandatory.yaml
# set up load balancer
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/cloud-generic.yaml
# spin up two containers in one deployment, same container port
kubectl apply -f test.yaml
test.yaml
:
apiVersion: v1
kind: Service
metadata:
name: echo1
spec:
ports:
- port: 80
targetPort: 5678
selector:
app: echo1
---
apiVersion: v1
kind: Service
metadata:
name: echo2
spec:
ports:
- port: 80
targetPort: 5678
selector:
app: echo2
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: echo12
spec:
selector:
matchLabels:
app: echo12
replicas: 1
template:
metadata:
labels:
app: echo12
spec:
containers:
- name: echo1
image: hashicorp/http-echo
args:
- "-text=echo1"
ports:
- containerPort: 5678
- name: echo2
image: hashicorp/http-echo
args:
- "-text=echo2"
ports:
- containerPort: 5678
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: echo-ingress
spec:
rules:
- host: echo1.example.com
http:
paths:
- backend:
serviceName: echo1
servicePort: 80
- host: echo2.example.com
http:
paths:
- backend:
serviceName: echo2
servicePort: 80
更新: 如果我添加一个单独的部署,它将起作用。是设计使然,还是有什么方法可以一次部署完成(原因:我希望能够一次重置所有已部署的域)?
答案 0 :(得分:2)
问题1 :在一个部署的一个容器中创建两个不同的服务后端。这不是吊舱设计的目的。如果要公开多个服务,则应该(至少)有一个容器来支持每个服务。通过允许您定义复制和生动性选项,部署围绕着Pod。对于您的情况,您应该为其相应的服务进行一个部署(创建一个或多个Pod,这些Pod将响应一个回显请求)。
问题2 :您没有将服务正确链接到后端。该服务显然正在尝试选择标签app=echo
或app=echo2
。在您的部署中,您的app=echo12
。因此,该服务将根本无法找到任何活动的端点。
要解决上述问题,请尝试以下操作:
apiVersion: v1
kind: Service
metadata:
name: echo1
spec:
ports:
- port: 80
targetPort: 5678
selector:
app: echo1
---
apiVersion: v1
kind: Service
metadata:
name: echo2
spec:
ports:
- port: 80
targetPort: 5678
selector:
app: echo2
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: echo1
spec:
selector:
matchLabels:
app: echo1
replicas: 1
template:
metadata:
labels:
app: echo1
spec:
containers:
- name: echo1
image: hashicorp/http-echo
args:
- "-text=echo1"
ports:
- containerPort: 5678
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: echo2
spec:
selector:
matchLabels:
app: echo2
replicas: 1
template:
metadata:
labels:
app: echo2
spec:
containers:
- name: echo2
image: hashicorp/http-echo
args:
- "-text=echo2"
ports:
- containerPort: 5678
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: echo-ingress
spec:
rules:
- host: echo1.example.com
http:
paths:
- backend:
serviceName: echo1
servicePort: 80
- host: echo2.example.com
http:
paths:
- backend:
serviceName: echo2
servicePort: 80
我已经在自己的集群中测试了以上内容,并验证了它是否可以正常工作(当然使用了不同的入口网址)。希望这会有所帮助!