导语：近期对公司的k8s进行了升级，同时升级了ingress版本，在使用同一份ingress的规则应用后发现经过ingress转发后前端收到的请求不一致。

有异常的服务器规则如下

请求日志

正常的服务器规则如下

请求日志

对比发现需要在ingress中添加如下规则

nginx.ingress.kubernetes.io/rewrite-target: /

我这里是改了

nginx.ingress.kubernetes.io/rewrite-target: /$1

原规则k8s1.16 nginx-ingress-controller:0.21.0

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"extensions/v1beta1","kind":"Ingress","metadata":{"annotations":{"nginx.ingress.kubernetes.io/rewrite-target":"/"},"name":"yitu-ingress","namespace":"yitu"},"spec":{"rules":[{"http":{"paths":[{"backend":{"serviceName":"mammo-front","servicePort":80},"path":"/mammo_service/"},{"backend":{"serviceName":"chestct-front","servicePort":80},"path":"/lungnodule_service/"},{"backend":{"serviceName":"boneage-front","servicePort":80},"path":"/bone_age/"},{"backend":{"serviceName":"mariner","servicePort":80},"path":"/mariner/"},{"backend":{"serviceName":"mercury","servicePort":80},"path":"/mercury/"},{"backend":{"serviceName":"mars","servicePort":80},"path":"/mars/"},{"backend":{"serviceName":"terra-front","servicePort":80},"path":"/terra/"},{"backend":{"serviceName":"neptune-front","servicePort":80},"path":"/neptune/"},{"backend":{"serviceName":"neptune-api","servicePort":80},"path":"/neptune_api/"},{"backend":{"serviceName":"grafana","servicePort":80},"path":"/grafana/"},{"backend":{"serviceName":"license-validator","servicePort":80},"path":"/license_validator/"},{"backend":{"serviceName":"image-viewer-frontend","servicePort":80},"path":"/imageviewer/"},{"backend":{"serviceName":"chestdr-front","servicePort":80},"path":"/chest_dr/"},{"backend":{"serviceName":"dicom-app","servicePort":80},"path":"/dicom-viewer/"},{"backend":{"serviceName":"studypull-front","servicePort":80},"path":"/study_pull_service/"},{"backend":{"serviceName":"hermes-log-receiver","servicePort":80},"path":"/hermes-log-receiver/"}]}}]}}
    nginx.ingress.kubernetes.io/rewrite-target: /
  creationTimestamp: "2022-06-28T03:40:08Z"
  generation: 26
  name: yitu-ingress
  namespace: yitu
  resourceVersion: "1820730"
  selfLink: /apis/extensions/v1beta1/namespaces/yitu/ingresses/yitu-ingress
  uid: 61f27398-be81-4ab6-a40c-526662777e90
spec:
  rules:
  - http:
      paths:
      - backend:
          serviceName: mammo-front
          servicePort: 80
        path: /mammo_service/
      - backend:
          serviceName: chestct-front
          servicePort: 80
        path: /lungnodule_service/
      - backend:
          serviceName: boneage-front
          servicePort: 80
        path: /bone_age/
      - backend:
          serviceName: mariner
          servicePort: 80
        path: /mariner/
      - backend:
          serviceName: mercury
          servicePort: 80
        path: /mercury/
      - backend:
          serviceName: app-config-front
          servicePort: 80
        path: /app-config-front/
      - backend:
          serviceName: terra-api
          servicePort: 8001
        path: /terra-api/
      - backend:
          serviceName: terra-front
          servicePort: 80
        path: /terra/
      - backend:
          serviceName: neptune-front
          servicePort: 80
        path: /neptune/
      - backend:
          serviceName: neptune-api
          servicePort: 80
        path: /neptune_api/
      - backend:
          serviceName: grafana
          servicePort: 80
        path: /grafana/
      - backend:
          serviceName: license-validator
          servicePort: 80
        path: /license_validator/
      - backend:
          serviceName: image-viewer-frontend
          servicePort: 80
        path: /imageviewer/
      - backend:
          serviceName: chestdr-front
          servicePort: 80
        path: /chest_dr/
      - backend:
          serviceName: dicom-app
          servicePort: 80
        path: /dicom-viewer/
      - backend:
          serviceName: studypull-front
          servicePort: 80
        path: /study_pull_service/
      - backend:
          serviceName: hermes-log-receiver
          servicePort: 80
        path: /hermes-log-receiver/
      - backend:
          serviceName: terra-app-config-bff
          servicePort: 8002
        path: /bff/
      - backend:
          serviceName: aiviewer-headless
          servicePort: 80
        path: /
status:
  loadBalancer: {}

现规则k8s1.20 nginx-ingress-controller:v1.1.1

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"networking.k8s.io/v1","kind":"Ingress","metadata":{"annotations":{},"name":"deepwise-ingress","namespace":"deepwise"},"spec":{"ingressClassName":"nginx","rules":[{"http":{"paths":[{"backend":{"service":{"name":"mammo-front","port":{"number":80}}},"path":"/mammo_service/","pathType":"Prefix"},{"backend":{"service":{"name":"chestct-front","port":{"number":80}}},"path":"/lungnodule_service/","pathType":"Prefix"},{"backend":{"service":{"name":"boneage-front","port":{"number":80}}},"path":"/bone_age/","pathType":"Prefix"},{"backend":{"service":{"name":"mariner","port":{"number":80}}},"path":"/mariner/","pathType":"Prefix"},{"backend":{"service":{"name":"mercury","port":{"number":80}}},"path":"/mercury/","pathType":"Prefix"},{"backend":{"service":{"name":"app-config-front","port":{"number":80}}},"path":"/app-config-front/","pathType":"Prefix"},{"backend":{"service":{"name":"terra-api","port":{"number":8001}}},"path":"/terra-api/","pathType":"Prefix"},{"backend":{"service":{"name":"terra-front","port":{"number":80}}},"path":"/terra/","pathType":"Prefix"},{"backend":{"service":{"name":"neptune-front","port":{"number":80}}},"path":"/neptune/","pathType":"Prefix"},{"backend":{"service":{"name":"neptune-api","port":{"number":80}}},"path":"/neptune_api/","pathType":"Prefix"},{"backend":{"service":{"name":"grafana","port":{"number":80}}},"path":"/grafana/","pathType":"Prefix"},{"backend":{"service":{"name":"license-validator","port":{"number":80}}},"path":"/license_validator/","pathType":"Prefix"},{"backend":{"service":{"name":"image-viewer-frontend","port":{"number":80}}},"path":"/imageviewer/","pathType":"Prefix"},{"backend":{"service":{"name":"chestdr-front","port":{"number":80}}},"path":"/chest_dr/","pathType":"Prefix"},{"backend":{"service":{"name":"dicom-app","port":{"number":80}}},"path":"/dicom-viewer/","pathType":"Prefix"},{"backend":{"service":{"name":"studypull-front","port":{"number":80}}},"path":"/study_pull_service/","pathType":"Prefix"},{"backend":{"service":{"name":"hermes-log-receiver","port":{"number":80}}},"path":"/hermes-log-receiver/","pathType":"Prefix"},{"backend":{"service":{"name":"terra-app-config-bff","port":{"number":8002}}},"path":"/bff/","pathType":"Prefix"},{"backend":{"service":{"name":"aiviewer-headless","port":{"number":80}}},"path":"/","pathType":"Prefix"}]}}]}}
    nginx.ingress.kubernetes.io/rewrite-target: /$1
    nginx.ingress.kubernetes.io/use-regex: "true"
  creationTimestamp: "2022-08-11T08:07:41Z"
  generation: 17
  managedFields:
  - apiVersion: networking.k8s.io/v1
    fieldsType: FieldsV1
    fieldsV1:
      f:metadata:
        f:annotations:
          .: {}
          f:kubectl.kubernetes.io/last-applied-configuration: {}
      f:spec:
        f:ingressClassName: {}
    manager: kubectl-client-side-apply
    operation: Update
    time: "2022-08-11T08:07:41Z"
  - apiVersion: networking.k8s.io/v1
    fieldsType: FieldsV1
    fieldsV1:
      f:metadata:
        f:annotations:
          f:nginx.ingress.kubernetes.io/rewrite-target: {}
          f:nginx.ingress.kubernetes.io/use-regex: {}
      f:spec:
        f:rules: {}
    manager: kubectl-edit
    operation: Update
    time: "2022-08-15T13:25:47Z"
  name: deepwise-ingress
  namespace: deepwise
  resourceVersion: "566745"
  uid: d579e690-877f-4eda-8743-6b359dbdf9a6
spec:
  ingressClassName: nginx
  rules:
  - http:
      paths:
      - backend:
          service:
            name: mammo-front
            port:
              number: 80
        path: /mammo_service/(.+)
        pathType: Prefix
      - backend:
          service:
            name: chestct-front
            port:
              number: 80
        path: /lungnodule_service/(.+)
        pathType: Prefix
      - backend:
          service:
            name: boneage-front
            port:
              number: 80
        path: /bone_age/(.+)
        pathType: Prefix
      - backend:
          service:
            name: mariner
            port:
              number: 80
        path: /mariner/(.+)
        pathType: Prefix
      - backend:
          service:
            name: mercury
            port:
              number: 80
        path: /mercury/(.+)
        pathType: Prefix
      - backend:
          service:
            name: app-config-front
            port:
              number: 80
        path: /app-config-front/(.+)
        pathType: Prefix
      - backend:
          service:
            name: app-config-front
            port:
              number: 80
        path: /app-config-front/
        pathType: Prefix
      - backend:
          service:
            name: terra-api
            port:
              number: 8001
        path: /terra-api/(.+)
        pathType: Prefix
      - backend:
          service:
            name: terra-front
            port:
              number: 80
        path: /terra/(.+)
        pathType: Prefix
      - backend:
          service:
            name: neptune-front
            port:
              number: 80
        path: /neptune/(.+)
        pathType: Prefix
      - backend:
          service:
            name: neptune-api
            port:
              number: 80
        path: /neptune_api/(.+)
        pathType: Prefix
      - backend:
          service:
            name: grafana
            port:
              number: 80
        path: /grafana/(.+)
        pathType: Prefix
      - backend:
          service:
            name: license-validator
            port:
              number: 80
        path: /license_validator/(.+)
        pathType: Prefix
      - backend:
          service:
            name: image-viewer-frontend
            port:
              number: 80
        path: /imageviewer/(.+)
        pathType: Prefix
      - backend:
          service:
            name: chestdr-front
            port:
              number: 80
        path: /chest_dr/(.+)
        pathType: Prefix
      - backend:
          service:
            name: dicom-app
            port:
              number: 80
        path: /dicom-viewer/(.+)
        pathType: Prefix
      - backend:
          service:
            name: studypull-front
            port:
              number: 80
        path: /study_pull_service/(.+)
        pathType: Prefix
      - backend:
          service:
            name: hermes-log-receiver
            port:
              number: 80
        path: /hermes-log-receiver/(.+)
        pathType: Prefix
      - backend:
          service:
            name: terra-app-config-bff
            port:
              number: 8002
        path: /bff/(.+)
        pathType: Prefix
      - backend:
          service:
            name: aiviewer-headless
            port:
              number: 80
        path: /?(.*)
        pathType: Prefix
status:
  loadBalancer:
    ingress:
    - ip: 100.64.40.5

这里测试path: /bff?(.*)等于/bff/(.+) 加上/bff/