Kubernetes: first iteration of Helm chart documentation

Author: glaubinix

docs/self-hosted/kubernetes-helm.md

@@ -0,0 +1,100 @@
+# Installing the Private Packagist Self-Hosted Helm chart in an existing Kubernetes cluster
+##
+
+The Private Packagist Self-Hosted Helm chart allows you to install Private Packagist in an existing Kubernetes cluster,
+to instead install Private Packagist Self-Hosted without an existing Kubernetes cluster follow [this guide](./kubernetes-embedded.md).
+
+## General requirements
+
+1. A Kubernetes cluster v1.23 or v1.24
+1. Your username and password to log in to the registry. Don't have one yet? [Sign up for a free trial license!](https://packagist.com/self-hosted)
+1. One (sub-)domain to operate the web interface, e.g. packagist.myintranet.com
+1. One (sub-)domain to operate the composer repository, e.g. repo.packagist.myintranet.com or packagist-repo.myintranet.com
+1. An SSL certificate valid for both chosen domains
+1. An SMTP server or a GMail account for Private Packagist Self-Hosted to send email
+1. If your firewall restricts external connections the following domains must be accessible from the server:
+  * hub.docker.com
+  * proxy.replicated.com
+  * registry.replicated.com
+  * replicated.app
+  * amazonaws.com
+  * k8s.gcr.io
+
+## Installation
+
+Private Packagist Self-Hosted requires PostgreSQL, Redis, and blob storage to store application data and Composer packages.
+You can either use the build-in options to come with the Helm chart or use your own PostgreSQL, Redis, and blob storage.
+For blob storage, we currently support Azure Blob Storage, Google Cloud Storage, AWS S3, and other S3-compatible storage solutions.
+
+Please note that if you chose to use the built-int solution then each of the storage requires one or more volumes using
+[dynamic volume provision](https://kubernetes.io/docs/concepts/storage/dynamic-provisioning/) to allocate storage for the different Pods.
+Configure the Storage Class in global values section.
+
+### Annotated configuration
+
+HELM_CHART_VALUES_FILE
+
+#### Login to the Helm registry and install the chart
+
+To install the Private Packagist Self-Hosted Helm Chart configure values based on your setup and then run the commands below.
+Make sure you replace `YOUR_USERNAME`, `YOUR_PASSWORD`, `YOURVALUES.yaml`, and `VERSION` with your values before running the commands.
+
+```
+helm registry login registry.replicated.com --username YOUR_USERNAME --password YOUR_PASSWORD
+helm install -f YOURVALUES.yaml private-packagist oci://registry.replicated.com/privatepackagistkots/unstable/private-packagist --version VERSION
+```
+
+#### Authentication Setup
+Within Private Packagist Self-Hosted, you now need to set up at least one user authentication method.
+You have the choice between authentication with email addresses and passwords and several OAuth integrations with third-party services.
+We provide integrations with on-premises versions of GitHub, Bitbucket, GitLab, or their public services on github.com, bitbucket.org,
+or gitlab.com. Follow the instructions to create the respective required identifiers, tokens, and secrets.
+
+* [GitHub (Enterprise) Integration Setup](./github-integration-setup.md)
+* [Bitbucket.org Integration Setup](./bitbucket-integration-setup.md)
+* [Bitbucket Data Center / Server Integration Setup](./bitbucket-server-integration-setup.md)
+* [GitLab Integration Setup](./gitlab-integration-setup.md)
+* [Authentication with Email Addresses and Passwords](./authentication-email-addresses-passwords-setup.md).
+
+
+![Add Integration](/Resources/public/img/docs/self-hosted/08-integration.png)
+
+#### Selecting Admins
+After setting up an integration, you can log in through the top menu. Register an account and pick a username.
+
+![Register Admin](/Resources/public/img/docs/self-hosted/09-register-admin.png)
+
+The first user is granted admin permissions automatically. You can grant admin permissions to more users in the admin panel.
+
+![Add Admin](/Resources/public/img/docs/self-hosted/10-add-admin.png)
+
+#### Switching to Production Mode
+Head back to the admin console to disable the Setup Mode in the configuration. Once the preflight checks passed, you can
+apply the changes.
+
+That’s it! Private Packagist Self-Hosted is now ready to be used! You’ll find all further information in the web interface.
+
+## Database and storage with dynamic volumes
+
+Private Packagist Self-Hosted will set up PostgreSQL, Redis, and MinIO to store application data and Composer packages.
+Each of them requires one or more volumes using [dynamic volume provision](https://kubernetes.io/docs/concepts/storage/dynamic-provisioning/) to allocate storage for the different Pods.
+Configure the Storage Class under the Kubernetes Settings on the Config page in the admin console.
+
+Alternatively, you can configure Private Packagist Self-Hosted to use your own PostgreSQL, Redis, and blob storage.
+For blob storage, we currently support Azure Blob Storage, Google Cloud Storage, AWS S3, and other S3-compatible storage solutions.
+
+## Security
+
+The Private Packagist Self-Hosted application expects that TLS termination happens at or before the Ingress level.
+All traffic within the cluster is unencrypted.
+
+Make sure your Kubernetes network plugin encrypts connections between pods to avoid potential security issues.
+
+## Backups
+
+The Replicated admin console integrates with [Velero](https://velero.io/), a tool to back up and restore your Kubernetes
+cluster resources and persistent volumes. Private Packagist Self-Hosted provides annotations to help back up and restore
+the application with Velero.
+
+If you are using your own backup solution, we recommend making regular backups of PostgreSQL, Redis, and the used blob
+storage.

docs/self-hosted/kubernetes.md

@@ -13,9 +13,14 @@ such as backups or updates.
 Private Packagist Self-Hosted Kubernetes can either be installed in an existing cluster or using an installer that creates
 an embedded Kubernetes cluster on a linux machine.
 
+#### Installing the Private Packagist Self-Hosted Kubernetes Helm chart in an existing cluster
+
+If you already have an existing Kubernetes cluster running, and are comfortable installing Helm charts then follow [this guide](./kubernetes-helm.md).
+
 #### Installing Private Packagist Self-Hosted Kubernetes in an existing cluster
 
-If you already have an existing Kubernetes cluster running, follow [this guide](./kubernetes-existing.md).
+If you already have an existing Kubernetes cluster running, and would like to manage the application with a full fledged
+admin interface then follow [this guide](./kubernetes-existing.md).
 
 #### Installing Private Packagist Self-Hosted Kubernetes in a Kubernetes cluster installed with kURL