How to Change the Default Timeout Settings For a Flex Gateway API?

For Flex Gateway 1.9.0 and later:

   You can refer to the official documentation to configure the timeout.

For Flex Gateway 1.8.x and below:

IN CONNECTED MODE

1. Go to the API Manager => Select the API => Policies => Add a policy => Select Header Injection
2. Add the following header:

Key: x-envoy-upstream-rq-timeout-ms
Value: your preffered value in milliseconds. For example, 30000 for 30 seconds


3. Save and test the API.

IN LOCAL MODE

Add a header injection policy for the API instance in its corresponding declarative configuration file as shown below:

- policyRef:
    name: header-injection-flex
    config:
      inboundHeaders:
        - key: x-envoy-upstream-rq-timeout-ms
          value: "30000"

For more details, refer to the "Policy Binding" and "Examples" sections in the following link:
https://docs.mulesoft.com/gateway/latest/flex-local-configuration-reference-guide#policy-binding

ADDITIONAL INFORMATION

1. Example outputs for default timeout(15s):

   # curl -v http://127.0.0.1:8081/200?sleep=20000
   *   Trying 127.0.0.1:8081...
   * Connected to 127.0.0.1 (127.0.0.1) port 8081 (#0)
   > GET /200?sleep=20000 HTTP/1.1
   > Host: 127.0.0.1:8081
   > User-Agent: curl/7.81.0
   > Accept: */*
   >
   * Mark bundle as not supporting multiuse
   < HTTP/1.1 504 Gateway Timeout
   < content-length: 24
   < content-type: text/plain
   < date: Tue, 31 Jan 2023 05:39:16 GMT
   < server: Anypoint Flex Gateway
   <
   * Connection #0 to host 127.0.0.1 left intact
   upstream request timeout

2. After adding the policy(30s):

   # curl -v http://127.0.0.1:8081/200?sleep=20000
   *   Trying 127.0.0.1:8081...
   * Connected to 127.0.0.1 (127.0.0.1) port 8081 (#0)
   > GET /200?sleep=20000 HTTP/1.1
   > Host: 127.0.0.1:8081
   > User-Agent: curl/7.81.0
   > Accept: */*
   >
   * Mark bundle as not supporting multiuse
   < HTTP/1.1 200 OK
   < content-length: 6
   < content-type: text/plain
   < date: Tue, 31 Jan 2023 05:41:16 GMT
   < request-context: appId=cid-v1:3548b0f5-7f75-492f-82bb-b6eb0e864e53
   < server: Anypoint Flex Gateway
   < set-cookie: ARRAffinity=8d9749e1ad54987267d51cda41194309f78e9fe336b09f44ea04d81342bdd40c;Path=/;HttpOnly;Secure;Domain=httpstat.us
   < set-cookie: ARRAffinitySameSite=8d9749e1ad54987267d51cda41194309f78e9fe336b09f44ea04d81342bdd40c;Path=/;HttpOnly;SameSite=None;Secure;Domain=httpstat.us
   < strict-transport-security: max-age=2592000
   < x-envoy-upstream-service-time: 20551
   <
   * Connection #0 to host 127.0.0.1 left intact
   200 OK

Disclaimer: This solution is provided as a reference for your own usage and is not to be considered a MuleSoft feature. This solution should be considered as a custom solution. The custom solution is not a Supported MuleSoft product.