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feat: add hello-universe 1.1.3 pack DOC-1273 (#89)
* feat: add hello-universe 1.1.3 pack DOC-1273 * feat: add tolerations section DOC-1273 * docs: add Upgrade section to the readme DOC-1273 * remove required from useTolerations
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| # Hello Universe | ||
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| [Hello Universe](https://github.com/spectrocloud/hello-universe) is a demo web application utilized to help users learn more about [Palette](https://docs.spectrocloud.com/introduction) and its features. | ||
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| You can deploy it using two preset configurations: | ||
| - A standalone front-end application. It provides a click counter that is saved locally and displays Spectro Cloud themed images. | ||
| - A three-tier application with a front-end application, API server and PostgreSQL database into a Kubernetes cluster. It provides a click counter that is saved in the deployed database and displays Spectro Cloud themed images. You can read more about this configuration on the Hello Universe [README](https://github.com/spectrocloud/hello-universe?tab=readme-ov-file#reverse-proxy-with-kubernetes). | ||
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| ## Prerequisites | ||
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| - A Palette account. | ||
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| - A cluster profile where the Hello Universe pack can be integrated. | ||
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| - A Palette cluster with port `:8080` available. If port 8080 is not available, you can set a different port in the **values.yaml** file. | ||
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| - If you are using the **Enable Hello Universe API** preset, you will need the `:3000` port available on your cluster too. Check out the [Usage](#usage) section for further details. | ||
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| - Ensure sufficient CPU resources within the cluster to allocate a minimum of 500 milliCPU and a maximum of 500 milliCPU per replica. | ||
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| ## Parameters | ||
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| The following parameters are applied to the **hello-universe.yaml** manifest through the **values.yaml** file. Users do not need to take any additional actions regarding these parameters. | ||
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| | **Parameter** | **Description** | **Default Value** | **Required** | | ||
| | --------------------------------- | ------------------------------------------------------------------------------ | ------------------------------------------- | ------------ | | ||
| | `manifests.namespace` | The namespace in which the application will be deployed. | `hello-universe` | Yes | | ||
| | `manifests.images.hellouniverse` | The [`hello-universe`](https://github.com/spectrocloud/hello-universe) application image that will be utilized to create the containers. | `ghcr.io/spectrocloud/hello-universe:1.1.3`/ `ghcr.io/spectrocloud/hello-universe:1.1.3-proxy` | Yes | | ||
| | `manifests.images.hellouniverseapi` | The [`hello-universe-api`](https://github.com/spectrocloud/hello-universe-api) application image that will be utilized to create the containers. | `ghcr.io/spectrocloud/hello-universe-api:1.0.12` | No | | ||
| | `manifests.images.hellouniversedb` | The [`hello-universe-db`](https://github.com/spectrocloud/hello-universe-db) application image that will be utilized to create the containers. | `ghcr.io/spectrocloud/hello-universe-db:1.0.2` | No | | ||
| | `manifests.apiEnabled` | The flag that indicates whether to deploy the UI application as standalone or together with the API server. | `false` | Yes | | ||
| | `manifests.port` | The cluster port number on which the service will listen for incoming traffic. | `8080` | Yes | | ||
| | `manifests.replicas` | The number of Pods to be created. | `1` | Yes | | ||
| | `manifests.dbPassword` | The base64 encoded database password to connect to the API database. | `REPLACE_ME` | No | | ||
| | `manifests.authToken` | The base64 encoded auth token for the API connection. | `REPLACE_ME` | No | | ||
| | `manifests.hello-universe.ui.useTolerations` | Flag to indicate whether to use tolerations for the UI pods. | `false` | No | | ||
| | `manifests.hello-universe.api.useTolerations` | Flag to indicate whether to use tolerations for the API pods. | `false` | No | | ||
| | `manifests.hello-universe.postgres.useTolerations` | Flag to indicate whether to use tolerations for the Postgres pods. | `false` | No | | ||
| | `manifests.hello-universe.ui.tolerations.effect` | The toleration effect to use for the Hello Universe UI pods. The allowed values are `PreferNoSchedule`, `NoSchedule` and `NoExecute`. | `PreferNoSchedule` | No | | ||
| | `manifests.hello-universe.api.tolerations.effect` | The toleration effect to use for the Hello Universe API pods. The allowed values are `PreferNoSchedule`, `NoSchedule` and `NoExecute`. | `PreferNoSchedule` | No | | ||
| | `manifests.hello-universe.postgres.tolerations.effect` | The toleration effect to use for the Hello Universe Postgres pods. The allowed values are `PreferNoSchedule`, `NoSchedule` and `NoExecute`. | `PreferNoSchedule` | No | | ||
| | `manifests.hello-universe.ui.tolerations.key` | The tolerations key to use for the Hello Universe UI pods. | `app` | No | | ||
| | `manifests.hello-universe.api.tolerations.key` | The tolerations key to use for the Hello Universe API pods. | `app` | No | | ||
| | `manifests.hello-universe.postgres.tolerations.key` | The tolerations key to use for the Hello Universe Postgres pods. | `app` | No | | ||
| | `manifests.hello-universe.ui.tolerations.value` | The tolerations value to use for the Hello Universe UI pods. | `ui` | No | | ||
| | `manifests.hello-universe.api.tolerations.value` | The tolerations value to use for the Hello Universe API pods. | `api` | No | | ||
| | `manifests.hello-universe.postgres.tolerations.value` | The tolerations value to use for the Hello Universe Postgres pods. | `postgres` | No | | ||
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| ## Upgrade | ||
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| Upgrades from the [hello-universe-1.1.1](../hello-universe-1.1.1/README.md) pack are not supported. If you want to upgrade the pack, you must first remove it from the cluster profile. Then, you can add the upgraded version as a cluster profile layer. | ||
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| ## Usage | ||
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| The Hello Universe pack has two presets that you can select: | ||
| - **Disable Hello Universe API** configures Hello Universe as a standalone frontend application. This is the default configuration of the pack. | ||
| - **Enable Hello Universe API** configures Hello Universe as a three-tier application with a frontend, API server, and Postgres database. | ||
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| To utilize the Hello Universe pack, create either a [full Palette cluster profile](https://docs.spectrocloud.com/profiles/cluster-profiles/create-cluster-profiles/create-full-profile) or an [add-on Palette cluster profile](https://docs.spectrocloud.com/profiles/cluster-profiles/create-cluster-profiles/create-addon-profile/) and add the pack to your profile. You can select the preset you wish to deploy on the cluster profile creation page. | ||
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| If your infrastructure provider does not offer a native load balancer solution, such as VMware and MAAS, the [MetalLB](https://docs.spectrocloud.com/integrations/metallb) pack must be included to the cluster profile to help the LoadBalancer service specified in the manifest obtain an IP address. | ||
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| After defining the cluster profile, use it to deploy a new cluster or attach it as an add-on profile to an existing cluster. | ||
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| Once the cluster status displays **Running** and **Healthy**, access the Hello Universe application through the exposed service URL along with the displayed port number. | ||
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| ### Tolerations | ||
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| The Hello Universe pack provides parameters for providing pod tolerations. These make it possible to provide [Kubernetes Taints](https://docs.spectrocloud.com/clusters/cluster-management/taints/#taints). You can only apply toleration for the UI, API, and Postgres pods. | ||
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| The parameters are applied using the `Equal` operator as demonstrated below: | ||
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| ```yaml | ||
| tolerations: | ||
| - effect: {{ .Values.ui.tolerations.effect }} | ||
| key: {{ .Values.ui.tolerations.key }} | ||
| operator: Equal | ||
| value: {{ .Values.ui.tolerations.value }} | ||
| ``` | ||
| ## References | ||
| - [Hello Universe GitHub Repository](https://github.com/spectrocloud/hello-universe) | ||
| - [Hello Universe API GitHub Repository](https://github.com/spectrocloud/hello-universe-api) | ||
| - [Deploy a Custom Pack Tutorial](https://docs.spectrocloud.com/registries-and-packs/deploy-pack/) | ||
| - [Registries and Packs](https://docs.spectrocloud.com/registries-and-packs/) | ||
| - [Node Labels and Taints](https://docs.spectrocloud.com/clusters/cluster-management/taints/) |
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