背景:
团队要发布一组应用,springboot开发的ws应用。然后需要对外。支持ws wss协议。jenkins写完pipeline发布任务。记得过去没有上容器的时候都是用的腾讯云的cls 挂证书映射cvm端口。我现在的网络环境是这样的:Kubernetes 1.20.5 安装traefik在腾讯云下的实践(当然了本次的环境是跑在tke1.20.6上面的,都是按照上面实例搭建的—除了我新建了一个namespace traefik,并将traefik应用都安装在了这个命名空间内!这样做的原因是tke的kebe-system下的pod太多了!我有强迫症)
部署与分析过程:
1. 关于我的应用:
应用的部署方式是statefulset,如下:
cat <<EOF > xxx-gateway.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: xxx-gateway
spec:
serviceName: xxx-gateway
replicas: 1
selector:
matchLabels:
app: xxx-gateway
template:
metadata:
labels:
app: xxx-gateway
spec:
containers:
- name: xxx-gateway
image: ccr.ccs.tencentyun.com/xxx-master/xxx-gateway:202107151002
env:
- name: SPRING_PROFILES_ACTIVE
value: "official"
- name: SPRING_APPLICATION_JSON
valueFrom:
configMapKeyRef:
name: spring-config
key: dev-config.json
ports:
- containerPort: 8443
resources:
requests:
memory: "512M"
cpu: "500m"
limits:
memory: "512M"
cpu: "500m"
imagePullSecrets:
- name: tencent
---
apiVersion: v1
kind: Service
metadata:
name: xxx-gateway
labels:
app: xxx-gateway
spec:
ports:
- port: 8443
selector:
app: xxx-gateway
clusterIP: None
EOF
kubectl apply -f xxx-gateway.yaml -n official
偷个懒直接copy了一个其他应用的 ingress yaml修改了一下,如下:
cat <<EOF > gateway-0-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: layaverse-gateway-0-http
namespace: official
annotations:
kubernetes.io/ingress.class: traefik
traefik.ingress.kubernetes.io/router.entrypoints: web
spec:
rules:
- host: xxx-gateway-0.xxx.com
http:
paths:
- pathType: Prefix
path: /
backend:
service:
name: xxx-gateway
port:
number: 8443
EOF
部署ingress
kubectl apply -f gateway-0-ingress.yaml
查看ingress部署状况
kubectl get ingress -n official
嗯 然后测试一下wss(wss我直接用443端口了。证书挂载slb层的–这是我理解的!具体的参照我traefik的配置),这里强调一下wscat这个工具。反正看了下我们的后端小伙伴测试ws应用都是用的在线的ws工具:
就这样的。然后正巧看到wscat就安装了一下:
sudo apt install npm
sudo npm install -g wscat
wscat -c wss://xxx-gateway-0.xxx.com:443/ws
嗯哼 基本上可以确认是应用对外成功了?
当然了以上只是我顺利的假想!
实际上是代理后连接后端的ws服务依然有各种问题(开始我怀疑是traefik的问题),还是连不上!我粗暴的把xxx-gateway 的暴露方式修改为NodePort 然后挂载到了slb层(在scl直接添加了ssl证书),测试了一下是可以的就直接用了。先让应用跑起来,然后再研究一下怎么处理。
2. 关于ws和http:
先不去管那么多,先整明白实现我的traefik如何实现代理ws呢?
图中内容摘自:https://blog.csdn.net/fmm_sunshine/article/details/77918477
3. 排查下是谁的锅
1. 搭建一个简单的ws应用
后端的代码既然搞不懂,那我就找一个简单的ws的服务然后用traefik代理测试一下!
dockerhub搜得一个nodejs 的websocket镜像:https://hub.docker.com/r/ksdn117/web-socket-test
部署一下:
cat <<EOF > web-socket-test.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: web-socket-test
spec:
serviceName: web-socket-test
replicas: 1
selector:
matchLabels:
app: web-socket-test
template:
metadata:
labels:
app: web-socket-test
spec:
containers:
- name: web-socket-test
image: ksdn117/web-socket-test
ports:
- containerPort: 8010
name: web
- containerPort: 8443
name: ssl
resources:
requests:
memory: "512M"
cpu: "500m"
limits:
memory: "512M"
cpu: "500m"
---
apiVersion: v1
kind: Service
metadata:
name: web-socket-test
labels:
app: web-socket-test
spec:
type: NodePort
ports:
- port: 8010
targetPort: 8010
protocol: TCP
name: web
- port: 8443
targetPort: 8443
name: ssl
protocol: TCP
selector:
app: web-socket-test
EOF
注: 我这里的配置文件加了type:NodePort
kubectl apply -f web-socket-test.yaml
kubectl get pods
kubectl get svc
2.内部wscat测试ws服务是否联通
先内部连接container pod ip测试一下服务:
wscat --connect ws://172.22.0.230:8010
kubectl logs -f web-socket-test-0
3.traefik对外代理ws应用并测试
traefik正常的对外暴露服务可以用ingress的方式还有ingressroute我都去尝试一下:
1. ingressroute方式
cat <<EOF > web-socket-ingressroute.yaml
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
name: web-socket-test-http
namespaces: default
spec:
entryPoints:
- web
routes:
- match: Host(`web-socket-test.xxx.com`)
kind: Rule
services:
- name: web-socket-test
port: 8010
EOF
kubectl apply -f web-socket-ingressroute.yaml
wscat连接测试一下:
这样测来是没有问题的?
删除ingress
kubectl delete -f web-socket-ingressroute.yaml
2. ingress方式
整一下ingress的方式:
cat <<EOF > web-socket-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: web-socket-test
namespace: default
annotations:
kubernetes.io/ingress.class: traefik
traefik.ingress.kubernetes.io/router.entrypoints: web
spec:
rules:
- host: web-socket-test.layame.com
http:
paths:
- pathType: Prefix
path: /
backend:
service:
name: web-socket-test
port:
number: 8010
EOF
kubectl apply -f web-socket-ingress.yaml
wscat --connect wss://web-socket-test.xxx.com:443
甩锅基本完成起码不是我的基础设施应的问题…..让后端小伙伴测试一下看下是哪里有问题了。从我代理层来说是没有问题的!
关于其他:
当然了看一些博客还有要加passHostHeader: true的配置的
1. ingressroute:
2. ingress
ingress:traefik.ingress.kubernetes.io/service.passhostheader: "true"
如果有问题 可以尝试一下上面的方式!