Kubernetes Ingress没有为grafana仪表板添加应用程序URL

Question

我已经在我的Kubenernetes 1.9群集中安装了Grafan。当我使用我的入口URL（http://sample.com/grafana/）访问第一页时。在那个javascript之后，css下载没有添加/ grafana到URL。

这是我的入口规则：

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: grafana-ingress-v1
  namespace: monitoring
  annotations:
    ingress.kubernetes.io/rewrite-target: /
    kubernetes.io/ingress.class: nginx
spec:
  tls:
  - hosts:
    - sample.com
    secretName: ngerss-tls
  rules:
  - host: sample.com
    http:
      paths:
      - path: /grafana/
        backend:
          serviceName: grafana-grafana
          servicePort: 80

在这里，我看到有关同一主题的讨论。但它没有帮我解决问题。

https://github.com/kubernetes/contrib/issues/860 下图显示第一个请求转到/ grafana /但第二个请求未在网址中添加/grafana/。

Answer 1

您的入口规则是正确的，nginx会创建正确的虚拟主机，以便将流量转发给grafana的服务（我只留下需要显示的字符串）：

 server {
    server_name sample.com;
    listen 80;
    listen [::]:80;
    set $proxy_upstream_name "-";

    location ~* ^/grafana/(?<baseuri>.*) {

        set $proxy_upstream_name "default-grafana-grafana-80";

        set $namespace      "default";
        set $ingress_name   "grafana-ingress-v1";


    rewrite /grafana/(.*) /$1 break;
    rewrite /grafana/ / break;
    proxy_pass http://default-grafana-grafana-80;

    }

是的，当你转到sample.com/grafana/时，你会收到来自grafana pod的回复，但它会重定向到sample.com/login页面（你会从你提供的屏幕截图中看到这一点）：

$ curl -v -L http://sample.com/grafana/
*   Trying 192.168.99.100...
* Connected to sample.com (192.168.99.100) port 80 (#0)
> GET /grafana/ HTTP/1.1
> Host: sample.com
> User-Agent: curl/7.47.0
> Accept: */*
> 
< HTTP/1.1 302 Found
< Server: nginx/1.13.5
< Date: Tue, 30 Jan 2018 21:55:21 GMT
< Content-Type: text/html; charset=utf-8
< Content-Length: 29
< Connection: keep-alive
< Location: /login
< Set-Cookie: grafana_sess=c07ab2399d82fef4; Path=/; HttpOnly
< Set-Cookie: redirect_to=%252F; Path=/
< 
* Ignoring the response-body
* Connection #0 to host sample.com left intact
* Issue another request to this URL: 'http://sample.com/login'
* Found bundle for host sample.com: 0x563ff9bf7f20 [can pipeline]
* Re-using existing connection! (#0) with host sample.com
* Connected to sample.com (192.168.99.100) port 80 (#0)
> GET /login HTTP/1.1
> Host: sample.com
> User-Agent: curl/7.47.0
> Accept: */*
> 
< HTTP/1.1 404 Not Found
< Server: nginx/1.13.5
< Date: Tue, 30 Jan 2018 21:55:21 GMT
< Content-Type: text/plain; charset=utf-8
< Content-Length: 21
< Connection: keep-alive
< 
* Connection #0 to host sample.com left intact
default backend 404

因为默认情况下grafana的root_url只是/：

root_url = %(protocol)s://%(domain)s:%(http_port)s/

当请求重定向到sample.com时，nginx会将其转发到默认后端404.

<强>解决方案：

您需要将root_url grafana的服务器设置更改为/grafana/：

root_url = %(protocol)s://%(domain)s:%(http_port)s/grafana/

您可以在grafana的configmap对象中更改此设置。

Answer 2

为了为Grafana提供前缀/ grafana（例如http://k8s.example.com/grafana），请将以下内容添加到您的 helm values.yaml 中。

ingress:
  enabled: true
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/rewrite-target: /$1
    nginx.ingress.kubernetes.io/use-regex: "true"

  path: /grafana/?(.*)
  hosts:
    - k8s.example.com

grafana.ini:
  server:
    root_url: http://localhost:3000/grafana # this host can be localhost

并按以下方式升级头盔grafana版本：

helm -n namespace_name upgrade -f values.yaml relase_name stable/grafana