From 82945464bd2370684008765b5b0c0caa38cffb0b Mon Sep 17 00:00:00 2001
From: Stephan Feurer <stephan.feurer@vshn.ch>
Date: Wed, 24 Jan 2024 12:21:51 +0100
Subject: [PATCH] Add cloudscale.ch architecture reference documentation

---
 .../images/ocp4-architecture-cloudscale.svg   |  4 +
 .../references/cloudscale/architecture.adoc   | 99 +++++++++++++++++++
 .../references/exoscale/architecture.adoc     |  2 +-
 docs/modules/ROOT/partials/nav.adoc           |  3 +
 4 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100755 docs/modules/ROOT/assets/images/ocp4-architecture-cloudscale.svg
 create mode 100644 docs/modules/ROOT/pages/references/cloudscale/architecture.adoc

diff --git a/docs/modules/ROOT/assets/images/ocp4-architecture-cloudscale.svg b/docs/modules/ROOT/assets/images/ocp4-architecture-cloudscale.svg
new file mode 100755
index 00000000..eae10ef5
--- /dev/null
+++ b/docs/modules/ROOT/assets/images/ocp4-architecture-cloudscale.svg
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
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text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 218px; height: 1px; padding-top: 155px; margin-left: 821px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">VSHN services<br /><br /><div align="left">- LDAP / SSO<br />- GitLab<br />- Project Syn API<br />- Project Syn Vault<br />- acme-dns<br />- central metrics store<br /></div></div></div></div></foreignObject><text x="930" y="159" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">VSHN services...</text></switch></g><rect x="623" y="0" width="170" height="90" fill="#ffffff" stroke="#000000" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; 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text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 378px; height: 1px; padding-top: 105px; margin-left: 1px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">managed by VSHN</div></div></div></foreignObject><text x="190" y="109" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">managed by VSHN</text></switch></g><rect x="0" y="130" width="380" height="30" fill="#d5e8d4" stroke="rgb(0, 0, 0)" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 378px; height: 1px; padding-top: 145px; margin-left: 1px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">managed by cloudscale.ch</div></div></div></foreignObject><text x="190" y="149" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">managed by cloudscale.ch</text></switch></g><rect x="0" y="170" width="380" height="30" fill="#d0cee2" stroke="#56517e" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; 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text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-end; justify-content: unsafe center; width: 139px; height: 1px; padding-top: 1147px; margin-left: 222px;"><div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;"><font style="font-size: 11px">OpenShift 4 Control plane nodes<br />3x 4vCPU/16GiB RAM<br /></font></div></div></div></foreignObject><text x="291" y="1147" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">OpenShift 4 Control pla...</text></switch></g><rect x="244.45" y="763.46" width="93.79" height="45.38" fill="none" stroke="rgb(0, 0, 0)" pointer-events="all"/><g transform="translate(-0.5 -0.5)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; 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\ No newline at end of file
diff --git a/docs/modules/ROOT/pages/references/cloudscale/architecture.adoc b/docs/modules/ROOT/pages/references/cloudscale/architecture.adoc
new file mode 100644
index 00000000..ba27bcb5
--- /dev/null
+++ b/docs/modules/ROOT/pages/references/cloudscale/architecture.adoc
@@ -0,0 +1,99 @@
+:infra-type: cloudscale.ch
+:infra-svg: ocp4-architecture-cloudscale.svg
+= APPUiO Managed OpenShift 4 on {infra-type}
+
+== Architecture overview
+
+include::partial$architecture/overview.adoc[]
+
+== {infra-type} requirements
+
+APPUiO Managed OpenShift 4 on {infra-type} needs a https://docs.openshift.com/container-platform/4.14/installing/installing_bare_metal/installing-bare-metal.html#installation-load-balancing-user-infra_installing-bare-metal[Load Balancer setup] that must meet the following requirements:
+
+1. API load balancer: Provides a common endpoint to interact with OpenShift and Kubernetes.
+
+2. Ingress load balancer: Provides an endpoint for application traffic flowing in from outside the cluster.
+
+See the https://docs.openshift.com/container-platform/latest/installing/installing_bare_metal/installing-bare-metal.html#installation-requirements-user-infra_installing-bare-metal[upstream documentation] for details on {infra-type} requirements.
+
+
+== Networking
+
+=== Machine network
+
+include::partial$architecture/networking-cluster.adoc[]
+
+=== Virtual IPs
+
+To expose applications and the Kubernetes API outside the cluster, APPUiO Managed OpenShift 4 manages three floating IPs:
+
+1. The "API VIP" for the Kubernetes and OpenShift API.
+APPUiO Managed OpenShift 4 uses a public floating IP as the API VIP.
+2. The "Ingress VIP" for the OpenShift Ingress Router.
+APPUiO Managed OpenShift 4 uses a public floating IP as the Ingress VIP.
+2. The "Egress VIP" for outgoing traffic of the nodes.
+APPUiO Managed OpenShift 4 uses a public floating IP for outgoing traffic.
+
+APPUiO Managed OpenShift 4 uses {infra-type} Load Balancer to manage the API and ingress VIPs and distributes traffic to the master / infrastructure nodes and {infra-type} vRouter for outgoing traffic.
+
+=== Pod and service networks
+
+include::partial$architecture/networking-pods.adoc[]
+
+=== Exposing the cluster
+
+We provide a CNAME target record to point additional DNS records to.
+
+=== External services
+
+include::partial$architecture/networking-external.adoc[]
+
+== Storage
+
+include::partial$architecture/storage.adoc[]
+
+== Glossary
+
+=== Components {infra-type}
+
+[cols="1,3,1"]
+|===
+|Name|Description|provided by
+
+|Load Balancer
+a|cloudscale.ch Load Balancer provide fail-over ingress to your cluster.
+This service is provided by {infra-type}.
+
+The main load balancer represents the virtual network device and is assigned VIP addresses (virtual IP addresses) through which incoming traffic is received.
+Traffic is distributed to the the individual endpoints, defined in a pool.
+
+See https://www.cloudscale.ch/en/api/v1#load-balancers[Upstream Documentation].
+
+|{infra-type}
+
+|vRouter
+a|A virtual router is a software function that replicates the functionality of a hardware-based router.
+This service is provided by {infra-type}.
+
+|{infra-type}
+
+|S3 compatible storage
+a|Various OpenShift components require S3 compatible storage.
+This storage is provided by {infra-type}.
+
+The main APPUiO Managed OpenShift 4 components that use object storage are
+
+* OpenShift integrated image registry
+* OpenShift logging stack
+* APPUiO Managed cluster backups
+|{infra-type}
+
+|===
+
+=== Components General
+
+include::partial$architecture/glossary-general.adoc[]
+
+=== Other terms
+
+include::partial$architecture/glossary-others.adoc[]
diff --git a/docs/modules/ROOT/pages/references/exoscale/architecture.adoc b/docs/modules/ROOT/pages/references/exoscale/architecture.adoc
index 7d8e38c7..cc96a081 100644
--- a/docs/modules/ROOT/pages/references/exoscale/architecture.adoc
+++ b/docs/modules/ROOT/pages/references/exoscale/architecture.adoc
@@ -34,7 +34,7 @@ To expose applications and the Kubernetes API outside the cluster, APPUiO Manage
 
 1. The "API VIP" for the Kubernetes and OpenShift API.
 APPUiO Managed OpenShift 4 uses a public floating IP as the API VIP.
-2. The "Ingress VIP" for the OpenShift Ingress Router
+2. The "Ingress VIP" for the OpenShift Ingress Router.
 APPUiO Managed OpenShift 4 uses a public floating IP as the Ingress VIP.
 
 APPUiO Managed OpenShift 4 uses two Load Balancer instances to manage the API and ingress VIPs and distributes traffic to the master / infrastructure nodes.
diff --git a/docs/modules/ROOT/partials/nav.adoc b/docs/modules/ROOT/partials/nav.adoc
index 970ac108..55b8fcd9 100644
--- a/docs/modules/ROOT/partials/nav.adoc
+++ b/docs/modules/ROOT/partials/nav.adoc
@@ -14,6 +14,8 @@
 ** xref:oc4:ROOT:references/architecture/metering-data-flow-appuio-managed.adoc[Resource Usage Reporting]
 ** xref:oc4:ROOT:references/architecture/single_sign_on.adoc[]
 
+** xref:oc4:ROOT:references/cloudscale/architecture.adoc[cloudscale.ch]
+
 ** xref:oc4:ROOT:references/exoscale/architecture.adoc[Exoscale]
 *** xref:oc4:ROOT:explanations/exoscale/limitations.adoc[Limitations]
 
@@ -25,6 +27,7 @@
 * Supported Infrastructures
 
 ** cloudscale.ch
+*** xref:oc4:ROOT:references/cloudscale/architecture.adoc[Architecture]
 *** xref:oc4:ROOT:references/cloudscale/config.adoc[Configuration]
 *** xref:oc4:ROOT:how-tos/cloudscale/install.adoc[Install]
 // Node management