Alibaba Cloud Service Mesh:Configure sidecar parameters to balance HTTP/2 streaming performance and resource usage

Parameter description

The following table describes the parameters provided by sidecars for HTTP/2 streaming. You can configure these parameters to balance the performance of HTTP/2 streaming and the resource usage of sidecars.

Adjust sidecar configurations

To configure the preceding parameters of a sidecar, you need to use a custom Envoy filter template. Perform the following steps:

Step 1: Use templates to write EnvoyFilter

This topic provides three templates to adjust the parameter values for upstream connections, downstream connections, and upstream and downstream connections, respectively. Replace ${TO_BE_POPULATE} in the templates with your desired values.

• Template used to adjust the parameter values for upstream connections:

  apiVersion: networking.istio.io/v1alpha3
  kind: EnvoyFilter
  metadata:
    name: h2-control
    namespace: default
  spec:
    configPatches:
    - applyTo: CLUSTER
      match:
        proxy:
          proxyVersion: ^1\.[1-9][0-9].*
      patch:
        operation: MERGE
        value:
          http2_protocol_options:
            initial_connection_window_size: ${TO_BE_POPULATE}
            initial_stream_window_size: ${TO_BE_POPULATE}
            max_concurrent_streams: ${TO_BE_POPULATE}

• Template used to adjust parameter values for downstream connections:

  apiVersion: networking.istio.io/v1alpha3
  kind: EnvoyFilter
  metadata:
    name: h2-control
    namespace: default
  spec:
    configPatches:
    - applyTo: NETWORK_FILTER
      match:
        listener:
          filterChain:
            filter:
              name: envoy.filters.network.http_connection_manager
        proxy:
          proxyVersion: ^1\.[1-9][0-9].*
      patch:
        operation: MERGE
        value:
          typed_config:
            '@type': type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
            http2_protocol_options:
              initial_connection_window_size: ${TO_BE_POPULATE}
              initial_stream_window_size: ${TO_BE_POPULATE}
              max_concurrent_streams: ${TO_BE_POPULATE}
            stream_idle_timeout: ${TO_BE_POPULATE}

• Template used to adjust parameter values for upstream and downstream connections:

  apiVersion: networking.istio.io/v1alpha3
  kind: EnvoyFilter
  metadata:
    name: h2-control
    namespace: default
  spec:
    configPatches:
    - applyTo: CLUSTER
      match:
        proxy:
          proxyVersion: ^1\.[1-9][0-9].*
      patch:
        operation: MERGE
        value:
          http2_protocol_options:
            initial_connection_window_size: ${TO_BE_POPULATE}
            initial_stream_window_size: ${TO_BE_POPULATE}
            max_concurrent_streams: ${TO_BE_POPULATE}
    - applyTo: NETWORK_FILTER
      match:
        listener:
          filterChain:
            filter:
              name: envoy.filters.network.http_connection_manager
        proxy:
          proxyVersion: ^1\.[1-9][0-9].*
      patch:
        operation: MERGE
        value:
          typed_config:
            '@type': type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
            http2_protocol_options:
              initial_connection_window_size: ${TO_BE_POPULATE}
              initial_stream_window_size: ${TO_BE_POPULATE}
              max_concurrent_streams: ${TO_BE_POPULATE}
            stream_idle_timeout: ${TO_BE_POPULATE}

Step 2: Create a custom EnvoyFilter template

1. Log on to the ASM console.

2. In the left-side navigation pane, choose Service Mesh > Mesh Management.

3. On the Mesh Management page, find the ASM instance that you want to configure. Click the name of the ASM instance or click Manage in the Actions column.

4. On the details page of the ASM instance, choose Plugin Extension Center > Market Place in the left-side navigation pane.

5. On the EnvoyFilter Template page, click Create EnvoyFilter Template. On the page that appears, configure the parameters, and then click Create.

   Section	Description
   Basic Information	In this section, specify the name of the custom EnvoyFilter template. In this topic, the name is set to h2-control.
   Multi-version adapted EnvoyFilter templates	Click Add an EnvoyFilter template for specific adapted istio version., select an Istio version, and copy the EnvoyFilter written in Step 1 to the YAML editor box.

6. Bind the Envoy filter template to workloads and namespaces. For more information, see Manage Envoy filters.