Add instructions for pipeline compute resource configurations

content/rancher/v2.x/en/tools/pipelines/configurations/_index.md

@@ -491,6 +491,7 @@ During the process of configuring a pipeline, you can configure advanced options
 - [Configuring Environment Variables](#configuring-environment-variables)
 - [Configuring Pipeline Secrets](#configuring-pipeline-secrets)
 - [Configuring the Executor Quota](#configuring-the-executor-quota)
+- [Configuring the Compute Resources](#configuring-the-compute-resources)
 
 ### Configuring Pipeline Trigger Rules
 
@@ -784,3 +785,54 @@ The _executor quota_ decides how many builds can run simultaneously in the proje
 1. From the main menu, select **Tools > Pipelines**.
 
 1. From `The maximum number of pipeline executors` increment the **Scale** up or down to change the quota. A value of `0` or less removes the quota limit.
+
+### Configuring the Compute Resources
+
+When a pipeline execution is triggered, a build pod is dynamically provisioned to run your CI tasks. Under the hood, A build pod consists of one Jenkins agent container and one container for each pipeline step. You can [manage compute resources](https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/) for every containers in the pod.
+
+To configure compute resources for Jenkins agent containers:
+
+1. From the context menu, open the project for which you've configured a pipeline.
+
+1. From the main menu, select **Tools > Pipelines**.
+
+1. From `Configure the resource limit and reservation for executors` edit the **Memory Reservation**, **Memory Limit**, **CPU Reservation** or **CPU Limit**, then click **Update Limit and Reservation**.
+
+To configure compute resources for pipeline-step containers:
+{{% tabs %}}
+{{% tab "By YAML" %}}
+
+You can configure compute resources for pipeline-step containers in the `.rancher-pipeline.yml` file.
+
+Under a `step` section, you will provide the following information:
+
+* CpuRequest: CPU request for the container of a pipeline step.
+* CpuLimit: CPU limit for the container of a pipeline step.
+* MemoryRequest: Memory request for the container of a pipeline step.
+* MemoryLimit: Memory limit for the container of a pipeline step.
+
+```yaml
+# example
+stages:
+  - name: Build something
+    steps:
+    - runScriptConfig:
+        image: busybox
+        shellScript: ls
+      cpuRequest: 100m
+      cpuLimit: 1
+      memoryRequest:100Mi
+      memoryLimit: 1Gi
+    - publishImageConfig:
+        dockerfilePath: ./Dockerfile
+        buildContext: .
+        tag: repo/app:v1
+      cpuRequest: 100m
+      cpuLimit: 1
+      memoryRequest:100Mi
+      memoryLimit: 1Gi
+```
+
+>**Note:** Rancher sets default compute resources for pipeline steps except for `Build and Publish Images` and `Run Script` steps. You can override the default value by specifying compute resources in the same way.
+{{% /tab %}}
+{{% /tabs %}}