Using target proxies

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Target proxies are referenced by one or more forwarding rules. Target proxies terminate connections from the client and creates new connections to the backends.

You can create a target proxy for the following load balancers:

  • Global external HTTP(S) load balancer
  • Global external HTTP(S) load balancer (classic)
  • Regional external HTTP(S) load balancer
  • Internal HTTP(S) load balancer
  • External SSL proxy load balancer
  • External TCP proxy load balancer
  • Internal regional TCP proxy load balancer

In the case of external HTTP(S) load balancers and internal HTTP(S) load balancers, proxies route incoming requests to a URL map.

In the case of external SSL proxy load balancers, external TCP proxy load balancers and internal regional TCP proxy load balancers, target proxies route incoming requests directly to backend services.

Create a target proxy

The following sections show you how to create a target proxy for the different load balancers.

For global external HTTP(S) load balancer

The global external HTTP(S) load balancer only supports Premium Tier and uses a global target HTTP(S) proxy. While the global external HTTP(S) load balancer (classic) can be deployed in Premium or Standard Tier, it requires a global target proxy irrespective of the Network Service Tiers. In Standard Tier, a regional forwarding rule points to a global target proxy.

To create a global target HTTP(S) proxy, perform the following steps:

Console: HTTP(S)

You can create a global target HTTP(S) proxy using the Google Cloud console when you're creating or updating a load balancer as shown in Configuring the load balancing resources.

gcloud: HTTP

gcloud compute target-http-proxies create HTTP_PROXY_NAME \
  --global \
  --url-map URL_MAP \
  --global-url-map \
  [--description DESCRIPTION]

gcloud: HTTPS

Before you run this command, you must create an SSL certificate resource for each certificate.

 gcloud compute target-https-proxies create HTTPS_PROXY_NAME \
   --global \
   --url-map URL_MAP \
   --global-url-map \
   --ssl-certificates SSL_CERT_1[,SSL_CERT_2,...] \
   --global-ssl-certificates \
   [--ssl-policy POLICY_NAME] \
   [--quic-override=ENABLE|DISABLE|NONE]

API: HTTP

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/global/targetHttpProxies

{
  "name": HTTP_PROXY_NAME,
  "urlMap": /projects/PROJECT_ID/global/urlMaps/URL_MAP_NAME
}

API: HTTPS

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/global/targetHttpsProxies

{
  "name": HTTPS_PROXY_NAME,
  "urlMap": /projects/PROJECT_ID/global/urlMaps/URL_MAP_NAME,
  "sslCertificates": /projects/PROJECT_ID/global/sslCertificates/SSL_CERT_NAME
}

For regional external HTTP(S) load balancer and internal HTTP(S) load balancer

For regional external HTTP(S) load balancers and internal HTTP(S) load balancers, a regional target proxy is required.

To create a regional target HTTP(S) proxy, perform the following steps:

Console

You can create a regional target HTTP(S) proxy using the Google Cloud console when you're creating or updating a load balancer as shown in Setting up internal HTTP(S) load balancer or Setting up regional external HTTP(S) load balancer.

gcloud: HTTP

gcloud compute target-http-proxies create HTTP_PROXY_NAME \
    --url-map URL_MAP \
    --url-map-region REGION \
    --region REGION \
    [--description DESCRIPTION]

gcloud: HTTPS

Before you run this command, you must create an SSL certificate resource for each certificate.

 gcloud compute target-https-proxies create HTTPS_PROXY_NAME \
     --url-map URL_MAP \
     --url-map-region REGION \
     --region REGION \
     --ssl-certificates SSL_CERT_NAME \
     --ssl-certificates-region REGION

API: HTTP

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/regions/REGION/targetHttpProxies

{
  "name": HTTP_PROXY_NAME,
  "urlMap": /projects/PROJECT_ID/regions/REGION/urlMaps/URL_MAP_NAME,
  "region": REGION
}

API: HTTPS

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/region/REGION/targetHttpsProxies

{
  "name": HTTPS_PROXY_NAME,
  "urlMap": /projects/PROJECT_ID/regions/REGION/urlMaps/URL_MAP_NAME,
  "region": REGION
  "sslCertificates": /projects/PROJECT_ID/regions/REGION/sslCertificates/SSL_CERT_NAME
}

For an external SSL proxy load balancer

For external SSL proxy load balancers, a global target proxy is required in both Standard and Premium Tier. This means that, in Standard Tier, a regional forwarding rule points to a global target proxy.

To create a global target SSL proxy, perform the following steps:

Console

You can create a global target SSL proxy using the Google Cloud console when you're creating or updating a load balancer as shown in Setting up external SSL proxy load balancer.

gcloud

Before you run this command, you must create an SSL certificate resource for each certificate.

 gcloud compute target-ssl-proxies create SSL_PROXY_NAME \
   --backend-service BACKEND_SERVICE \
   --ssl-certificates SSL_CERT_1[,SSL_CERT_2,...] \
   [--ssl-policy POLICY_NAME] \
   [--quic-override=ENABLE|DISABLE|NONE] \
   [--proxy-header=(NONE | PROXY_V1)]

API

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/global/targetSslProxies

{
  "name": SSL_PROXY_NAME,
  "proxyHeader": ("NONE" | "PROXY_V1"),
  "service": "projects/PROJECT/global/backendServices/BACKEND_SERVICE"
  "sslCertificates": /projects/PROJECT_ID/global/sslCertificates/SSL_CERT_NAME
}

For an external TCP proxy load balancer

To create a global target TCP proxy, perform the following steps:

Console

You can create a global target TCP proxy using the Google Cloud console when you're creating or updating a load balancer as shown in Setting up external TCP proxy load balancer.

gcloud

 gcloud compute target-tcp-proxies create TCP_PROXY_NAME \
   --backend-service BACKEND_SERVICE \
   --proxy-header=(NONE | PROXY_V1)

API

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/global/targetTcpProxies

{
  "name": TCP_PROXY_NAME,
  "proxyHeader": ("NONE" | "PROXY_V1"),
  "service": "projects/PROJECT/global/backendServices/BACKEND_SERVICE"
}

For an internal regional TCP proxy load balancer

To create a regional target TCP proxy, perform the following steps:

Console

You can create a regional target TCP proxy using the Google Cloud console when you're creating or updating a load balancer as shown in Setting up internal regional TCP proxy load balancer.

gcloud

 gcloud compute target-tcp-proxies create TCP_PROXY_NAME \
   --backend-service BACKEND_SERVICE \
   --region REGION \
   --proxy-header=(NONE | PROXY_V1)

API

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/regions/REGION/targetTcpProxies

{
  "name": TCP_PROXY_NAME,
  "proxyHeader": ("NONE" | "PROXY_V1"),
  "region": REGION,
  "service": "projects/PROJECT/regions/REGION/backendServices/BACKEND_SERVICE"
}

Listing target proxies

To list target proxies, perform the following steps.

For global external HTTP(S) load balancer

Console

Go to the Target Proxies page.
Go to the Target Proxies page

gcloud: HTTP

gcloud compute target-http-proxies list --global

gcloud: HTTPS

gcloud compute target-https-proxies list --global

API: HTTP

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpProxies

API: HTTPS

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpsProxies

For regional external HTTP(S) load balancer and internal HTTP(S) load balancer

Console

Go to the Target Proxies page.
Go to the Target Proxies page

gcloud: HTTP

gcloud compute target-http-proxies list \
    --filter="region:(COMMA_DELIMITED_LIST_OF_REGIONS)"

gcloud: HTTPS

gcloud compute target-https-proxies list \
   --filter="region:(COMMA_DELIMITED_LIST_OF_REGIONS)"

API: HTTP

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpProxies

API: HTTPS

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpsProxies

For an external SSL proxy load balancer

Console

Go to the Target Proxies page.
Go to the Target Proxies page

gcloud

gcloud compute target-ssl-proxies list

API

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetSslProxies

For an external TCP proxy load balancer

Console

Go to the Target Proxies page.
Go to the Target Proxies page

gcloud

gcloud compute target-tcp-proxies list

API

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetTcpProxies

For an internal regional TCP proxy load balancer

Console

gcloud

gcloud compute target-tcp-proxies list \
    --filter="region:(COMMA_DELIMITED_LIST_OF_REGIONS)"

API

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetTcpProxies

Getting information about a target proxy

To get information about a single target HTTP or HTTPS proxy, perform the following steps.

For global external HTTP(S) load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select a Target name.
  3. View the Target details screen. To return to the Load balancing screen, click the left-facing arrow at the top of the screen.

gcloud: HTTP

gcloud compute target-http-proxies describe HTTP_PROXY_NAME \
   --global

gcloud: HTTPS

gcloud compute target-https-proxies describe HTTPS_PROXY_NAME \
   --global

API: HTTP

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpProxies/HTTP_PROXY_NAME

API: HTTPS

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpsProxies/HTTPS_PROXY_NAME

For regional external HTTP(S) load balancer and internal HTTP(S) load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select a Target name.
  3. View the Target details screen. To return to the Load balancing screen, click the left-facing arrow at the top of the screen.

gcloud: HTTP

gcloud compute target-http-proxies describe HTTP_PROXY_NAME \
   --region=REGION

gcloud: HTTPS

gcloud compute target-https-proxies describe HTTPS_PROXY_NAME \
   --region=REGION

API: HTTP

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpProxies/HTTP_PROXY_NAME

API: HTTPS

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpsProxies/HTTPS_PROXY_NAME

For an external SSL proxy load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select a Target name.
  3. View the Target details screen. To return to the Load balancing screen, click the left-facing arrow at the top of the screen.

gcloud

gcloud compute target-ssl-proxies describe SSL_PROXY_NAME

API

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetSslProxies/SSL_PROXY_NAME

For an external TCP proxy load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select a Target name.
  3. View the Target details screen. To return to the Load balancing screen, click the left-facing arrow at the top of the screen.

gcloud

gcloud compute target-tcp-proxies describe TCP_PROXY_NAME

API

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetTcpProxies/TCP_PROXY_NAME

For an internal regional TCP proxy load balancer

Console

gcloud

gcloud compute target-tcp-proxies describe TCP_PROXY_NAME \
    --region=REGION

API

GET https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetTcpProxies/TCP_PROXY_NAME

Updating the target proxy to point to a different URL map

To update the target proxy to point to a different URL map, perform the following steps.

For global external HTTP(S) load balancer

To update the URL map associated with a target proxy, perform the following steps:

Console

HTTP(S) proxies can't be edited in the Google Cloud console. You can edit the target proxy by using gcloud or the API.

gcloud: HTTP

gcloud compute target-http-proxies update HTTP_PROXY_NAME \
    --url-map URL_MAP \
    --global \
    --global-url-map

gcloud: HTTPS

gcloud compute target-https-proxies update HTTPS_PROXY_NAME \
    --url-map URL_MAP \
    --global \
    --global-url-map

API: HTTP

POST https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpProxies/HTTP_PROXY_NAME/setUrlMap

{
  "urlMap": /projects/PROJECT_ID/global/urlMaps/URL_MAP_NAME
}

API: HTTPS

POST https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpsProxies/HTTPS_PROXY_NAME/setUrlMap

{
  "urlMap": "urlMap": /projects/PROJECT_ID/global/urlMaps/URL_MAP_NAME
}

For regional external HTTP(S) load balancer and internal HTTP(S) load balancer

To update the URL map associated with a target proxy, perform the following steps:

Console

HTTP(S) proxies can't be edited in the Google Cloud console. You can edit the target proxy by using gcloud or the API.

gcloud: HTTP

gcloud compute target-http-proxies update HTTP_PROXY_NAME \
    --url-map URL_MAP \
    --region=REGION \
    --url-map-region=REGION

gcloud: HTTPS

gcloud compute target-https-proxies update HTTPS_PROXY_NAME \
    --url-map URL_MAP \
    --region=REGION \
    --url-map-region=REGION

API: HTTP

POST https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpProxies/HTTP_PROXY_NAME/setUrlMap

{
  "urlMap": /projects/PROJECT_ID/regions/REGIONurlMaps/URL_MAP_NAME
}

API: HTTPS

POST https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpsProxies/HTTPS_PROXY_NAME/setUrlMap

{
  "urlMap": /projects/PROJECT_ID/regions/REGION/urlMaps/URL_MAP_NAME
}

Updating the SSL certificate resource for the target HTTPS proxy

Use this procedure to replace the SSL certificate on the HTTPS proxy. You must already have created any additional SSL certificate resources that you need.

Console

  1. Go to the Load balancing page in the Google Cloud console.

    Go to the Load balancing page

  2. Click Edit next to your load balancer.

  3. Click Frontend configuration.

  4. In the Certificate drop-down menu, select the new certificate.

  5. Click Add certificate if you need to add more certificates.

  6. Click Done.

gcloud

You can configure the documented number of SSL certificates per target HTTPS proxy.

gcloud compute target-https-proxies update PROXY_NAME \
    --ssl-certificates=SSL_CERT_1,SSL_CERT_2,...

API: HTTPS

You can use the following API call to replace the SSL certificate for the HTTPS Proxy.

POST [https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/targetHttpsProxies/HTTPS_PROXY_NAME/setSslCertificates]

The request body contains data with the following structure:

{
  "sslCertificates": [
    "SSL_CERT_URL"
  ]
}

Replace the following:

  • PROJECT_ID: Project ID for this request
  • HTTPS_PROXY_NAME: Name of the Target HTTPS Proxy resource for which the SSL certificate resource is being updated
  • SSL_CERT_URL: Server-defined URL (selfLink) for the SSL certificate resource

Deleting a target proxy

To delete a target HTTP or HTTPS proxy, perform the following steps.

For global external HTTP(S) load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select Target proxies.
  3. Click the checkbox for the Target name to delete.
  4. Click Delete.

gcloud: HTTP

gcloud compute target-http-proxies delete HTTP_PROXY_NAME \
   --global

gcloud: HTTPS

gcloud compute target-https-proxies delete HTTPS_PROXY_NAME \
   --global

API: HTTP

DELETE https://compute.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpProxies/HTTP_PROXY_NAME

API: HTTPS

DELETE https://www.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetHttpsProxies/HTTPS_PROXY_NAME

For regional external HTTP(S) load balancer and internal HTTP(S) load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select Target proxies.
  3. Click the checkbox for the Target name to delete.
  4. Click Delete.

gcloud: HTTP

gcloud compute target-http-proxies delete HTTP_PROXY_NAME \
   --region=REGION

gcloud: HTTPS

gcloud compute target-https-proxies delete HTTPS_PROXY_NAME \
   --region=REGION

API: HTTP

DELETE https://www.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpProxies/HTTP_PROXY_NAME

API: HTTPS

DELETE https://www.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetHttpsProxies/HTTPS_PROXY_NAME

For an external SSL proxy load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select Target proxies.
  3. Click the checkbox for the Target name to delete.
  4. Click Delete.

gcloud

gcloud compute target-ssl-proxies delete SSL_PROXY_NAME

API

DELETE https://www.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetSslProxies/SSL_PROXY_NAME

For an external TCP proxy load balancer

Console

  1. Go to the Target Proxies page.
    Go to the Target Proxies page
  2. Select Target proxies.
  3. Click the checkbox for the Target name to delete.
  4. Click Delete.

gcloud

gcloud compute target-tcp-proxies delete TCP_PROXY_NAME

API

DELETE https://www.googleapis.com/compute/v1/projects/PROJECT_ID/global/targetTcpProxies/TCP_PROXY_NAME

For a internal regional TCP proxy load balancer

Console

gcloud

gcloud compute target-tcp-proxies delete TCP_PROXY_NAME \
    --region=REGION

API

DELETE https://www.googleapis.com/compute/v1/projects/PROJECT_ID/regions/REGION/targetTcpProxies/TCP_PROXY_NAME

Updating the QUIC protocol setting

Target HTTPS proxies support the use of the QUIC transport protocol with the optional flag --quic-override.

Console: HTTPS

You can use the Google Cloud console to configure the QUIC setting when you're setting up a new load balancer, as shown in Configuring the load balancing resources.

gcloud: HTTPS

Before you run this command, you must create an SSL certificate resource for each certificate.

 gcloud compute target-https-proxies create HTTPS_PROXY_NAME \
   --global \
   --quic-override=QUIC_SETTING

where QUIC_SETTING is one of the following:

  • NONE (Default) Allows Google to control when QUIC is negotiated. Currently, when you select NONE, QUIC is disabled. By selecting this option, you are allowing Google to automatically enable QUIC negotiations and HTTP/3 in the future for this load balancer. In the Google Cloud console, this option is called Automatic (Default).
  • ENABLED Allows the load balancer to negotiate QUIC with clients.
  • DISABLED Prevents the load balancer from negotiating QUIC with clients.

API: HTTPS

POST https://www.googleapis.com/v1/compute/projects/PROJECT_ID/global/targetHttpsProxies/TARGET_PROXY_NAME/setQuicOverride

{
  "quicOverride": QUIC_SETTING
}

where QUIC_SETTING is one of the following:

  • NONE (Default) Allows Google to control when QUIC is negotiated. Currently, when you select NONE, QUIC is disabled. By selecting this option, you are allowing Google to automatically enable QUIC negotiations and HTTP/3 in the future for this load balancer. In the Google Cloud console, this option is called Automatic (Default).
  • ENABLED Allows the load balancer to negotiate QUIC with clients.
  • DISABLED Prevents the load balancer from negotiating QUIC with clients.

API and gcloud reference

For descriptions of the properties and methods available to you when working with target proxies through the REST API, see the following pages:

For descriptions of the properties and methods available to you when working with target proxies through the gcloud command-line tool, see the following pages:

What's next