WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package proxy

import (
	"context"
	"fmt"
	"math/rand"
	"net"
	"net/http"
	"net/url"
	"strconv"
	"strings"
	"time"

	"k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/errors"

Because we have a proxy with a path prefix of `/api/v1` for our app, the frontend needs to fetch the OpenAPI schema at `/api/v1/openapi.json`.

```mermaid
graph LR

browser("Browser")
proxy["Proxy on http://0.0.0.0:9999/api/v1/app"]
server["Server on http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

!!! tip

Da wir für unsere Anwendung einen Proxy mit dem Pfadpräfix `/api/v1` haben, muss das Frontend das OpenAPI-Schema unter `/api/v1/openapi.json` abrufen.

```mermaid
graph LR

browser("Browser")
proxy["Proxy auf http://0.0.0.0:9999/api/v1/app"]
server["Server auf http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

!!! tip "Tipp"

# Please keep kube-proxy configuration in-sync with:
# cluster/addons/kube-proxy/kube-proxy-ds.yaml
apiVersion: v1
kind: Pod
metadata:
  name: kube-proxy
  namespace: kube-system
  labels:
    tier: node
    component: kube-proxy
spec:
  priorityClassName: system-node-critical
  priority: 2000001000
  hostNetwork: true
  tolerations:
  - operator: "Exists"
    effect: "NoExecute"
  - operator: "Exists"
    effect: "NoSchedule"

            - "15090,15021,{{ excludeInboundPort (annotation .ObjectMeta `status.sidecar.istio.io/port` .Values.global.proxy.statusPort) (annotation .ObjectMeta `traffic.sidecar.istio.io/excludeInboundPorts` .Values.global.proxy.excludeInboundPorts) }}"
          {{- else }}

	_ "k8s.io/component-base/metrics/prometheus/clientgo" // for client metric registration
	_ "k8s.io/component-base/metrics/prometheus/version"  // for version metric registration
	"k8s.io/kubernetes/cmd/kube-proxy/app"
)

func main() {
	command := app.NewProxyCommand()
	code := cli.Run(command)
	os.Exit(code)

apiVersion: v1
kind: ServiceAccount
metadata:
  name: metadata-proxy
  namespace: kube-system
  labels:
    k8s-app: metadata-proxy
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: metadata-proxy-v0.1
  namespace: kube-system
  labels:
    k8s-app: metadata-proxy
    kubernetes.io/cluster-service: "true"

# Please keep kube-proxy configuration in-sync with:
# cluster/saltbase/salt/kube-proxy/kube-proxy.manifest

apiVersion: apps/v1
kind: DaemonSet
metadata:
  labels:
    k8s-app: kube-proxy
    addonmanager.kubernetes.io/mode: Reconcile
  name: kube-proxy
  namespace: kube-system
spec:
  selector:
    matchLabels:
      k8s-app: kube-proxy
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 10%

        - my
        - custom
        - args
        image: fake/custom-image
      containers:
        - name: hello
          image: "fake.docker.io/google-samples/hello-go-gke:1.0"
        - name: istio-proxy
          image: auto
          resources:
            requests:
              cpu: 123m
            limits:
              cpu: 3000m
          livenessProbe:
            failureThreshold: 30

apiVersion: v1
kind: ServiceAccount
metadata:
  name: kube-proxy
  namespace: kube-system
  labels:
    addonmanager.kubernetes.io/mode: Reconcile
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: system:kube-proxy
  labels:
    addonmanager.kubernetes.io/mode: Reconcile
subjects:
  - kind: ServiceAccount
    name: kube-proxy
    namespace: kube-system
roleRef:
  kind: ClusterRole