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+# PCloud Installation Instructions
+
+## Overview
+PCloud is multitenant by default and its services are split into two **infrastructure** and **application** categories.
+Infrastructure services are shared among all PCloud instances installed on the same cluster of servers, while application services are installed separately for each instance.
+
+PCloud runs on top of Kubernetes, bellow are listed all namespaces needed for healthy setup with services running inside them.
+
+Infrastructure:
+* **pcloud-networking-metallb**: runs [metallb](https://metallb.universe.tf) so we can use LoadBalancer type services when running PCloud on on-prem hardware.
+* **pcloud-ingress-public**: runs [ingress-nginx](https://github.com/kubernetes/ingress-nginx) to expose services outside of the cluster.
+* **pcloud-cert-manager**: runs [cert-manager](https://cert-manager.io) to automate generating SSL certificates for services.
+* **pcloud-nebula-controller**: runs [nebula](https://github.com/slackhq/nebula) [controller](https://github.com/giolekva/pcloud/tree/main/core/nebula/controller) to automate signing certificates for VPN mesh network nodes.
+* **pcloud-oauth2-manager**: runs [Ory Hydra Maester](https://github.com/ory/hydra-maester) to automate generating registering OAuth2 clients.
+* **pcloud-mail-gateway**: runs instance of [maddy](https://maddy.email) as a SMTP MX gateway routing incoming emails to proper PCloud instances and routing outgoing emails to the *world*.
+* **longhorn-system**: runs [Longhorn](https://longhorn.io) to support persistent volumens.
+* **pcloud-kubed**: runs [kubed](https://github.com/kubeops/config-syncer) to automatically sync wildcard and root level domain certificates across all namespaces of one PCloud instance.
+
+Applications, assuming PCloud instance is named **example**:
+* **example-ingress-private**: runs another instance of ingress-nginx to handle traffic coming from private mesh network.
+* **example-core-auth**: runs [Ory Kratos](https://www.ory.sh/kratos/docs/) for user authentication, [Ory Hydra](https://www.ory.sh/hydra/docs/) to handle OAuth2 and OpenID connect, and [PCloud serlfservice UI](https://github.com/giolekva/pcloud/tree/main/core/auth/ui) which provides registration/authentication UI.
+* **example-app-pihole**: runs [Pi-hole](https://pi-hole.net) to provide DNS based network wide Ad Blocker for private mesh network nodes.x
+* **example-app-maddy**: runs another instance of maddy to provide SMTP and IMAP services to users.
+* **example-app-vaultwarden**: runs [Vaultwarden](https://github.com/dani-garcia/vaultwarden) which is alternate implementation of Bitwarden Server API to provide users secure password manager.
+* **example-app-matrix**: runs [Matrix](https://matrix.org) [Synapse](https://github.com/matrix-org/synapse) homeserver.
+* **example**: holds information about above mentioned namespaces.
+
+## Setup instructions
+### Prerequisites:
+* Installation scripts expect working Kubernetes cluster.
+* Helm 3: https://helm.sh/docs/intro/install/
+* Helm diff plugin: https://github.com/databus23/helm-diff#install
+* Helm secrets plugin: https://github.com/jkroepke/helm-secrets/wiki/Installation
+* Mozilla SOPS: https://github.com/mozilla/sops#1download
+* helmfile: https://github.com/roboll/helmfile#installation
+
+### Infrastructure:
+First update mail-gateway domains section in `pcloud/helmfile/infra/helmfile.yaml`
+* **name**: domain name
+* **namespace**: **bobo**-app-maddy
+* **mx**: mail.<same domain name as above>
+* **certificateissuer**: **bobo**-public
+
+Run:
+```shell
+cd pcloud/helmfile/infra/
+helmfile -e prod apply --skip-diff-on-install
+```
+
+### Applications:
+First configure `.sops.yaml` file in pcloud/helmfile/apps directory.
+
+Then create `secrets.bobo.yaml` file with for keys:
+* **gandiAPIToken**: your Gandi API token
+* **piholeOAuth2ClientSecret**: generate using https://github.com/oauth2-proxy/oauth2-proxy/blob/master/docs/docs/configuration/overview.md#generating-a-cookie-secret
+* **piholeOAuth2CookieSecret**: ditto
+* **matrixOAuth2ClientSecret**: ditto
+
+Next add new environment in `pcloud/helmfile/apps/helmfile.yaml`
+```yaml
+  bobo:
+    secrets:
+    - secrets.bobo.yaml
+    values:
+    - pcloudEnvName: pcloud
+    - id: bobo
+    - namespacePrefix: bobo-
+    - domain: <repeat primary domain from infra/helmfile.yaml>
+    - contactEmail: <your email address>
+    - certManagerNamespace: pcloud-cert-manager
+    - mxHostname: <repeat primary domain mx hostname from infra/helmfile.yaml>
+    - mailGatewayAddress: "tcp://maddy.pcloud-mail-gateway.svc.cluster.local:587"
+    - matrixStorageSize: 100Gi
+    - publicIP: <clusters public IP>
+    - lighthouseMainIP: 111.0.0.1
+    - lighthouseMainPort: 4242
+    - lighthouseAuthUIIP: 111.0.0.2
+```
+
+Run **(you might have to run this step multiple times :)**
+```shell
+cd pcloud/helmfile/apps/
+helmfile -e bobo apply --skip-diff-on-install
+```