44 lines
2.2 KiB
Markdown
44 lines
2.2 KiB
Markdown
---
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title: Modify Replicas
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description: This article introduces how KubeVela adjusts the number of application copies.
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---
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This section introduces how manually modify replicas to apply.
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## Before starting
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- You've walked through at least one type of application deployment.
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## Attaching Trait
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KubeVela has a built-in `scaler` Trait by default, which supports the adjustment of replicas in typical workloads, such as `webservice` and `k8s-objects` applications.
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> For k8s-objects type applications, when multiple resources are involved, please put the workload resources such as Deployment, Statefulset, Job in the first place so that the Trait of `scaler` can take effect.
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Let's take first-vela-app in `Deliver First Application` as an example. First, open the application's `Baseline Config`-`Properties` page:
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Next, we click the Settings (gear) button on the right side of Set Replicas to adjust replicas to 3. After clicking save, the changes will be temporarily stored.
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Then to make it effective in a certain environment, we need to click the `Deploy` button or the multi-environment workflow selection button next to it and select the corresponding environment to perform the deployment.
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After the deployment is complete, you can enter the environment instance page. You'll find 3 rows of data that have appeared in the instance list.
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> Trait can extend more powerful features, such as HPA.
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## Edit deployment parameters
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For applications created using Helm or other custom deployment types, if Traits are not applicable, you can directly edit the deployment parameters to adjust the number of application instances.
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For example, in Helm applications, the general Chart package provides parameters for setting the number of replicas, which can be set by setting Values.
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Take [apache chart](https://github.com/bitnami/charts/tree/master/bitnami/apache) as an example, set `replicaCount=3` in Values to adjust the number of replicas.
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## Next step
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- [View Application Logs](../how-to/dashboard/application/get-application-log)
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- [Customize Scaler Trait](../platform-engineers/traits/customize-trait)
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