YCStorageBucket

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Updated at July 3, 2026

Controlling browser behavior
Cheatsheet
YCStorageBucketSpec
- YCStorageBucketReference

YCStorageBucket is a Gwin custom resource for referencing S3 buckets from Yandex Object Storage. It allows you to use Object Storage buckets as backend targets in HTTPRoute, IngressBackendGroup, Ingress resources for serving static content or as part of traffic routing strategies.

When a request is routed to a YCStorageBucket backend, the load balancer forwards the request to the bucket using the URL path from the incoming request. For example, a request for /robots.txt will fetch the object at key robots.txt from the bucket.

Controlling browser behavior

Whether a browser displays or downloads a file depends on the Content-Type and Content-Disposition response headers. To make the browser display the content instead of downloading it, ensure the object is served with the correct Content-Type and no Content-Disposition: attachment.

Option 1 (recommended): Upload objects with explicit content type metadata:

aws s3 cp index.html s3://my-bucket/index.html
--content-type "text/html; charset=utf-8"
--endpoint-url https://storage.yandexcloud.net

Option 2: Override headers at the routing layer without changing objects in storage.

For HTTPRoute, use a ResponseHeaderModifier filter on the rule:

filters:

type: ResponseHeaderModifier
responseHeaderModifier:
set:
- name: Content-Type
value: text/html; charset=utf-8
remove:
- Content-Disposition

For Ingress, use annotations on the rule:

annotations:
gwin.yandex.cloud/rules.modifyResponseHeaders.replace.Content-Type: "text/html; charset=utf-8"
gwin.yandex.cloud/rules.modifyResponseHeaders.remove: "Content-Disposition"

Cheatsheet

apiVersion: gwin.yandex.cloud/v1
kind: YCStorageBucket
metadata:
  name: example-bucket
  namespace: example-ns
spec:
  bucketRef:
    bucketName: "my-static-content-bucket"

Reference the YCStorageBucket as a backend in HTTPRoute:

apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: static-content-route
  namespace: example-ns
spec:
  parentRefs:
    - name: example-gateway
  hostnames:
    - "static.example.com"
  rules:
    - matches:
        - path:
            type: PathPrefix
            value: "/assets"
      backendRefs:
        - group: gwin.yandex.cloud
          kind: YCStorageBucket
          name: example-bucket
          weight: 100

To use YCStorageBucket as a backend for Ingress, use IngressBackendGroup.

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: static-content-ingress
  namespace: example-ns
  annotations:
    ...
spec:
  ingressClassName: gwin-default
  rules:
    - host: static.example.com
      http:
        paths:
          - pathType: Prefix
            path: "/assets"
            backend:
              resource:
                apiGroup: gwin.yandex.cloud
                kind: IngressBackendGroup
                name: static-bg
---
apiVersion: gwin.yandex.cloud/v1
kind: IngressBackendGroup
metadata:
  name: static-bg
  namespace: example-ns
spec:
  type: HTTP
  backends:
    - name: some-bucket
      backendRef:
        group: gwin.yandex.cloud
        kind: YCStorageBucket
        name: example-bucket
        weight: 100