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Yandex Application Load Balancer

Method get

Written by

Returns the specified virtual host.

To get the list of all virtual hosts of an HTTP router, make a list request.

HTTP request

GET https://alb.api.cloud.yandex.net/apploadbalancer/v1/httpRouters/{httpRouterId}/virtualHosts/{virtualHostName}

Path parameters

Parameter Description
httpRouterId

Required. ID of the HTTP router that the virtual host belongs to.

To get the HTTP router ID, make a list request.
virtualHostName

Required. Name of the virtual host to return.

To get the virtual host name, make a list request.

Value must match the regular expression ([a-z]([-a-z0-9]{0,61}[a-z0-9])?)?.

Response

HTTP Code: 200 - OK

{
  "name": "string",
  "authority": [
    "string"
  ],
  "routes": [
    {
      "name": "string",
      "routeOptions": {
        "modifyRequestHeaders": [
          {
            "name": "string",

            // `routes[].routeOptions.modifyRequestHeaders[]` includes only one of the fields `append`, `replace`, `remove`, `rename`
            "append": "string",
            "replace": "string",
            "remove": true,
            "rename": "string",
            // end of the list of possible fields`routes[].routeOptions.modifyRequestHeaders[]`

          }
        ],
        "modifyResponseHeaders": [
          {
            "name": "string",

            // `routes[].routeOptions.modifyResponseHeaders[]` includes only one of the fields `append`, `replace`, `remove`, `rename`
            "append": "string",
            "replace": "string",
            "remove": true,
            "rename": "string",
            // end of the list of possible fields`routes[].routeOptions.modifyResponseHeaders[]`

          }
        ]
      },

      // `routes[]` includes only one of the fields `http`, `grpc`
      "http": {
        "match": {
          "httpMethod": [
            "string"
          ],
          "path": {

            // `routes[].http.match.path` includes only one of the fields `exactMatch`, `prefixMatch`
            "exactMatch": "string",
            "prefixMatch": "string",
            // end of the list of possible fields`routes[].http.match.path`

          }
        },

        // `routes[].http` includes only one of the fields `route`, `redirect`, `directResponse`
        "route": {
          "backendGroupId": "string",
          "timeout": "string",
          "idleTimeout": "string",
          "prefixRewrite": "string",
          "upgradeTypes": [
            "string"
          ],

          // `routes[].http.route` includes only one of the fields `hostRewrite`, `autoHostRewrite`
          "hostRewrite": "string",
          "autoHostRewrite": true,
          // end of the list of possible fields`routes[].http.route`

        },
        "redirect": {
          "replaceScheme": "string",
          "replaceHost": "string",
          "replacePort": "string",
          "removeQuery": true,
          "responseCode": "string",

          // `routes[].http.redirect` includes only one of the fields `replacePath`, `replacePrefix`
          "replacePath": "string",
          "replacePrefix": "string",
          // end of the list of possible fields`routes[].http.redirect`

        },
        "directResponse": {
          "status": "string",
          "body": {
            "text": "string"
          }
        },
        // end of the list of possible fields`routes[].http`

      },
      "grpc": {
        "match": {
          "fqmn": {

            // `routes[].grpc.match.fqmn` includes only one of the fields `exactMatch`, `prefixMatch`
            "exactMatch": "string",
            "prefixMatch": "string",
            // end of the list of possible fields`routes[].grpc.match.fqmn`

          }
        },

        // `routes[].grpc` includes only one of the fields `route`, `statusResponse`
        "route": {
          "backendGroupId": "string",
          "maxTimeout": "string",
          "idleTimeout": "string",

          // `routes[].grpc.route` includes only one of the fields `hostRewrite`, `autoHostRewrite`
          "hostRewrite": "string",
          "autoHostRewrite": true,
          // end of the list of possible fields`routes[].grpc.route`

        },
        "statusResponse": {
          "status": "string"
        },
        // end of the list of possible fields`routes[].grpc`

      },
      // end of the list of possible fields`routes[]`

    }
  ],
  "modifyRequestHeaders": [
    {
      "name": "string",

      // `modifyRequestHeaders[]` includes only one of the fields `append`, `replace`, `remove`, `rename`
      "append": "string",
      "replace": "string",
      "remove": true,
      "rename": "string",
      // end of the list of possible fields`modifyRequestHeaders[]`

    }
  ],
  "modifyResponseHeaders": [
    {
      "name": "string",

      // `modifyResponseHeaders[]` includes only one of the fields `append`, `replace`, `remove`, `rename`
      "append": "string",
      "replace": "string",
      "remove": true,
      "rename": "string",
      // end of the list of possible fields`modifyResponseHeaders[]`

    }
  ],
  "routeOptions": {
    "modifyRequestHeaders": [
      {
        "name": "string",

        // `routeOptions.modifyRequestHeaders[]` includes only one of the fields `append`, `replace`, `remove`, `rename`
        "append": "string",
        "replace": "string",
        "remove": true,
        "rename": "string",
        // end of the list of possible fields`routeOptions.modifyRequestHeaders[]`

      }
    ],
    "modifyResponseHeaders": [
      {
        "name": "string",

        // `routeOptions.modifyResponseHeaders[]` includes only one of the fields `append`, `replace`, `remove`, `rename`
        "append": "string",
        "replace": "string",
        "remove": true,
        "rename": "string",
        // end of the list of possible fields`routeOptions.modifyResponseHeaders[]`

      }
    ]
  }
}

A virtual host resource.
For details about the concept, see documentation.

Field Description
name string

Required. Name of the virtual host. The name is unique within the HTTP router.
authority[] string

List of domains that are attributed to the virtual host.

The host is selected to process the request received by the load balancer if the domain specified in the HTTP/1.1 Host header or the HTTP/2 :authority pseudo-header matches a domain specified in the host.

A wildcard asterisk character (*) matches 0 or more characters.

If not specified, all domains are attributed to the host, which is the same as specifying a * value. An HTTP router must not contain more than one virtual host to which all domains are attributed.
routes[] object

Routes of the virtual host.

A route contains a set of conditions (predicates) that are used by the load balancer to select the route for the request and an action on the request. For details about the concept, see documentation.

The order of routes matters: the first route whose predicate matches the request is selected. The most specific routes should be at the top of the list, so that they are not overridden. For example, if the first HTTP route is configured, via match, to match paths prefixed with just /, other routes are never matched.
routes[].
name		 string

Required. Name of the route.
routes[].
routeOptions		 object
routes[].
routeOptions.
modifyRequestHeaders[]		 object

Apply the following modifications to the request headers.
routes[].
routeOptions.
modifyRequestHeaders[].
name		 string

Name of the header.
routes[].
routeOptions.
modifyRequestHeaders[].
append		 string
routes[].routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Appends the specified string to the header value.

Variables defined for Envoy proxy are supported.
routes[].
routeOptions.
modifyRequestHeaders[].
replace		 string
routes[].routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the value of the header with the specified string.

Variables defined for Envoy proxy are supported.
routes[].
routeOptions.
modifyRequestHeaders[].
remove		 boolean (boolean)
routes[].routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Removes the header.
routes[].
routeOptions.
modifyRequestHeaders[].
rename		 string
routes[].routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the name of the header with the specified string. This operation is only supported for ALB Virtual Hosts.
routes[].
routeOptions.
modifyResponseHeaders[]		 object

Apply the following modifications to the response headers.
routes[].
routeOptions.
modifyResponseHeaders[].
name		 string

Name of the header.
routes[].
routeOptions.
modifyResponseHeaders[].
append		 string
routes[].routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Appends the specified string to the header value.

Variables defined for Envoy proxy are supported.
routes[].
routeOptions.
modifyResponseHeaders[].
replace		 string
routes[].routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the value of the header with the specified string.

Variables defined for Envoy proxy are supported.
routes[].
routeOptions.
modifyResponseHeaders[].
remove		 boolean (boolean)
routes[].routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Removes the header.
routes[].
routeOptions.
modifyResponseHeaders[].
rename		 string
routes[].routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the name of the header with the specified string. This operation is only supported for ALB Virtual Hosts.
routes[].
http		 object
HTTP route configuration.
routes[] includes only one of the fields http, grpc
routes[].
http.
match		 object
Condition (predicate) used to select the route.
routes[].
http.
match.
httpMethod[]		 string

HTTP method specified in the request.
routes[].
http.
match.
path		 object

Match settings for the path specified in the request.

If not specified, the route matches all paths.

A string matcher resource.
routes[].
http.
match.
path.
exactMatch		 string
routes[].http.match.path includes only one of the fields exactMatch, prefixMatch

Exact match string.
routes[].
http.
match.
path.
prefixMatch		 string
routes[].http.match.path includes only one of the fields exactMatch, prefixMatch

Prefix match string.
routes[].
http.
route		 object
Forwards the request to a backend group for processing as configured.
routes[].http includes only one of the fields route, redirect, directResponse
routes[].
http.
route.
backendGroupId		 string

Required. Backend group to forward requests to.

Stream (TCP) backend groups are not supported.
routes[].
http.
route.
timeout		 string

Overall timeout for an HTTP connection between a load balancer node an a backend from the backend group: the maximum time the connection is kept alive for, regardless of whether data is transferred over it.

If a connection times out, the load balancer responds to the client with a 504 Gateway Timeout status code.

Default value: 60.
routes[].
http.
route.
idleTimeout		 string

Idle timeout for an HTTP connection between a load balancer node an a backend from the backend group: the maximum time the connection is allowed to be idle, i.e. without any data transferred over it.

Specifying meaningful values for both timeout and idle_timeout is useful for implementing server-push mechanisms such as long polling, server-sent events (EventSource interface) etc.

If a connection times out, the load balancer responds to the client with a 504 Gateway Timeout status code.

If not specified, no idle timeout is used, and an alive connection may be idle for any duration (see timeout).
routes[].
http.
route.
prefixRewrite		 string

Replacement for the path prefix matched by StringMatch.

For instance, if prefixMatch value is /foo and replace_prefix value is /bar, a request with /foobaz path is forwarded with /barbaz path. For exactMatch, the whole path is replaced.

If not specified, the path is not changed.
routes[].
http.
route.
upgradeTypes[]		 string

Supported values for HTTP Upgrade header. E.g. websocket.
routes[].
http.
route.
hostRewrite		 string
routes[].http.route includes only one of the fields hostRewrite, autoHostRewrite

Host replacement.
routes[].
http.
route.
autoHostRewrite		 boolean (boolean)
routes[].http.route includes only one of the fields hostRewrite, autoHostRewrite

Automatically replaces the host with that of the target.
routes[].
http.
redirect		 object
Redirects the request as configured.
routes[].http includes only one of the fields route, redirect, directResponse
routes[].
http.
redirect.
replaceScheme		 string

URI scheme replacement.

If http or https scheme is to be replaced and 80 or 443 port is specified in the original URI, the port is also removed.

If not specified, the original scheme and port are used.
routes[].
http.
redirect.
replaceHost		 string

URI host replacement.

If not specified, the original host is used.
routes[].
http.
redirect.
replacePort		 string (int64)

URI host replacement.

If not specified, the original host is used.
routes[].
http.
redirect.
removeQuery		 boolean (boolean)

Removes URI query.
routes[].
http.
redirect.
responseCode		 string
HTTP status code to use in redirect responses.
  • MOVED_PERMANENTLY: 301 Moved Permanently status code.
  • FOUND: 302 Found status code.
  • SEE_OTHER: 303 See Other status code.
  • TEMPORARY_REDIRECT: 307 Temporary Redirect status code.
  • PERMANENT_REDIRECT: 308 Permanent Redirect status code.
routes[].
http.
redirect.
replacePath		 string
routes[].http.redirect includes only one of the fields replacePath, replacePrefix

Replacement for the whole path.
routes[].
http.
redirect.
replacePrefix		 string
routes[].http.redirect includes only one of the fields replacePath, replacePrefix

Replacement for the path prefix matched by StringMatch.

For instance, if prefixMatch value is /foo and replace_prefix value is /bar, a request with https://example.com/foobaz URI is redirected to https://example.com/barbaz. For exactMatch, the whole path is replaced.
routes[].
http.
directResponse		 object
Instructs the load balancer to respond directly as configured.
routes[].http includes only one of the fields route, redirect, directResponse
routes[].
http.
directResponse.
status		 string (int64)

HTTP status code to use in responses.

Acceptable values are 100 to 599, inclusive.
routes[].
http.
directResponse.
body		 object

Response body.

A health check payload resource.
routes[].
http.
directResponse.
body.
text		 string

Payload text.

The string length in characters must be greater than 0.
routes[].
grpc		 object
gRPC route configuration.
routes[] includes only one of the fields http, grpc
routes[].
grpc.
match		 object
Condition (predicate) used to select the route.
routes[].
grpc.
match.
fqmn		 object

Match settings for gRPC service method called in the request.

A match string must be a fully qualified method name, e.g. foo.bar.v1.BazService/Get, or a prefix of such.

If not specified, the route matches all methods.

A string matcher resource.
routes[].
grpc.
match.
fqmn.
exactMatch		 string
routes[].grpc.match.fqmn includes only one of the fields exactMatch, prefixMatch

Exact match string.
routes[].
grpc.
match.
fqmn.
prefixMatch		 string
routes[].grpc.match.fqmn includes only one of the fields exactMatch, prefixMatch

Prefix match string.
routes[].
grpc.
route		 object
Forwards the request to a backend group for processing as configured.
routes[].grpc includes only one of the fields route, statusResponse
routes[].
grpc.
route.
backendGroupId		 string

Required. Backend group to forward requests to.
routes[].
grpc.
route.
maxTimeout		 string

Overall timeout for an underlying HTTP connection between a load balancer node an a backend from the backend group: the maximum time the connection is kept alive for, regardless of whether data is transferred over it.

If a client specifies a lower timeout in HTTP grpc-timeout header, the max_timeout value is ignored.

If a connection times out, the load balancer responds to the client with an UNAVAILABLE status code.

Default value: 60.
routes[].
grpc.
route.
idleTimeout		 string

Idle timeout for an underlying HTTP connection between a load balancer node an a backend from the backend group: the maximum time the connection is allowed to be idle, i.e. without any data transferred over it.

Specifying meaningful values for both maxTimeout and idle_timeout is useful for implementing server-push mechanisms such as long polling, server-sent events etc.

If a connection times out, the load balancer responds to the client with an UNAVAILABLE status code.

If not specified, no idle timeout is used, and an alive connection may be idle for any duration (see maxTimeout).
routes[].
grpc.
route.
hostRewrite		 string
routes[].grpc.route includes only one of the fields hostRewrite, autoHostRewrite

Host replacement.
routes[].
grpc.
route.
autoHostRewrite		 boolean (boolean)
routes[].grpc.route includes only one of the fields hostRewrite, autoHostRewrite

Automatically replaces the host with that of the target.
routes[].
grpc.
statusResponse		 object
Instructs the load balancer to respond directly with a specified status.
routes[].grpc includes only one of the fields route, statusResponse
routes[].
grpc.
statusResponse.
status		 string

gRPC status code to use in responses.

gRPC status code supported for use in responses.

  • OK: OK (0) status code.
  • INVALID_ARGUMENT: INVALID_ARGUMENT (3) status code.
  • NOT_FOUND: NOT_FOUND (5) status code.
  • PERMISSION_DENIED: PERMISSION_DENIED (7) status code.
  • UNAUTHENTICATED: UNAUTHENTICATED (16) status code.
  • UNIMPLEMENTED: UNIMPLEMENTED (12) status code.
  • INTERNAL: INTERNAL (13) status code.
  • UNAVAILABLE: UNAVAILABLE (14) status code.
modifyRequestHeaders[] object

Deprecated, use route_options.modify_request_headers.
modifyRequestHeaders[].
name		 string

Name of the header.
modifyRequestHeaders[].
append		 string
modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Appends the specified string to the header value.

Variables defined for Envoy proxy are supported.
modifyRequestHeaders[].
replace		 string
modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the value of the header with the specified string.

Variables defined for Envoy proxy are supported.
modifyRequestHeaders[].
remove		 boolean (boolean)
modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Removes the header.
modifyRequestHeaders[].
rename		 string
modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the name of the header with the specified string. This operation is only supported for ALB Virtual Hosts.
modifyResponseHeaders[] object

Deprecated, use route_options.modify_response_headers.
modifyResponseHeaders[].
name		 string

Name of the header.
modifyResponseHeaders[].
append		 string
modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Appends the specified string to the header value.

Variables defined for Envoy proxy are supported.
modifyResponseHeaders[].
replace		 string
modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the value of the header with the specified string.

Variables defined for Envoy proxy are supported.
modifyResponseHeaders[].
remove		 boolean (boolean)
modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Removes the header.
modifyResponseHeaders[].
rename		 string
modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the name of the header with the specified string. This operation is only supported for ALB Virtual Hosts.
routeOptions object
routeOptions.
modifyRequestHeaders[]		 object

Apply the following modifications to the request headers.
routeOptions.
modifyRequestHeaders[].
name		 string

Name of the header.
routeOptions.
modifyRequestHeaders[].
append		 string
routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Appends the specified string to the header value.

Variables defined for Envoy proxy are supported.
routeOptions.
modifyRequestHeaders[].
replace		 string
routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the value of the header with the specified string.

Variables defined for Envoy proxy are supported.
routeOptions.
modifyRequestHeaders[].
remove		 boolean (boolean)
routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Removes the header.
routeOptions.
modifyRequestHeaders[].
rename		 string
routeOptions.modifyRequestHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the name of the header with the specified string. This operation is only supported for ALB Virtual Hosts.
routeOptions.
modifyResponseHeaders[]		 object

Apply the following modifications to the response headers.
routeOptions.
modifyResponseHeaders[].
name		 string

Name of the header.
routeOptions.
modifyResponseHeaders[].
append		 string
routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Appends the specified string to the header value.

Variables defined for Envoy proxy are supported.
routeOptions.
modifyResponseHeaders[].
replace		 string
routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the value of the header with the specified string.

Variables defined for Envoy proxy are supported.
routeOptions.
modifyResponseHeaders[].
remove		 boolean (boolean)
routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Removes the header.
routeOptions.
modifyResponseHeaders[].
rename		 string
routeOptions.modifyResponseHeaders[] includes only one of the fields append, replace, remove, rename

Replaces the name of the header with the specified string. This operation is only supported for ALB Virtual Hosts.
Language / Region
© 2022 Yandex.Cloud LLC
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