[RDT] Refactoring RTD

Major refactor
Moved some old docs etc to archived dir
Added sub section for guides
Added section for deployment options
etc

Signed-off-by: efiacor <fiachra.corcoran@est.tech>
Change-Id: I5832c7a94d58c3110655f0c676a5f2a19172dc68
Issue-ID: OOM-3028

1 files changed, 144 insertions, 0 deletions

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+.. This work is licensed under a Creative Commons Attribution 4.0
+.. International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. Copyright 2021 Nokia
+
+.. Links
+.. _Cert-Manager Installation documentation: https://cert-manager.io/docs/installation/kubernetes/
+.. _Cert-Manager kubectl plugin documentation: https://cert-manager.io/docs/usage/kubectl-plugin/
+.. _Strimzi Apache Kafka Operator helm Installation documentation: https://strimzi.io/docs/operators/in-development/deploying.html#deploying-cluster-operator-helm-chart-str
+
+.. _oom_setup_paas:
+
+ONAP PaaS set-up
+################
+
+Starting from Honolulu release, Cert-Manager and Prometheus Stack are a part
+of k8s PaaS for ONAP operations and can be installed to provide
+additional functionality for ONAP engineers.
+Starting from Jakarta release, Strimzi Apache Kafka is deployed to provide
+Apache kafka as the default messaging bus for ONAP.
+
+The versions of PaaS components that are supported by OOM are as follows:
+
+.. table:: ONAP PaaS components
+
+  ==============     =============  =================  =======
+  Release            Cert-Manager   Prometheus Stack   Strimzi
+  ==============     =============  =================  =======
+  honolulu           1.2.0          13.x
+  istanbul           1.5.4          19.x
+  jakarta                                              0.28.0
+  ==============     =============  =================  =======
+
+This guide provides instructions on how to install the PaaS
+components for ONAP.
+
+.. contents::
+   :depth: 1
+   :local:
+..
+
+Strimzi Apache Kafka Operator
+=============================
+
+Strimzi provides a way to run an Apache Kafka cluster on Kubernetes
+in various deployment configurations by using kubernetes operators.
+Operators are a method of packaging, deploying, and managing a
+Kubernetes application.
+Strimzi Operators extend Kubernetes functionality, automating common
+and complex tasks related to a Kafka deployment. By implementing
+knowledge of Kafka operations in code, Kafka administration
+tasks are simplified and require less manual intervention.
+
+Installation steps
+------------------
+
+The recommended version of Strimzi for Kubernetes 1.19 is v0.28.0.
+The Strimzi cluster operator is deployed using helm to install the parent chart
+containing all of the required custom resource definitions. This should be done
+by a kubernetes administrator to allow for deployment of custom resources in to
+any kubernetes namespace within the cluster.
+
+Full installation instructions can be found in the
+`Strimzi Apache Kafka Operator helm Installation documentation`_.
+
+Installation can be as simple as:
+
+- Add the helm repo::
+
+    > helm repo add strimzi https://strimzi.io/charts/
+
+- Install the operator::
+
+    > helm install strimzi-kafka-operator strimzi/strimzi-kafka-operator --namespace strimzi-system --version 0.28.0 --set watchAnyNamespace=true --create-namespace
+
+Cert-Manager
+============
+
+Cert-Manager is a native Kubernetes certificate management controller.
+It can help with issuing certificates from a variety of sources, such as
+Let’s Encrypt, HashiCorp Vault, Venafi, a simple signing key pair, self
+signed or external issuers. It ensures certificates are valid and up to
+date, and attempt to renew certificates at a configured time before expiry.
+
+Installation steps
+------------------
+
+The recommended version of Cert-Manager for Kubernetes 1.19 is v1.5.4.
+Cert-Manager is deployed using regular YAML manifests which include all
+the needed resources (the CustomResourceDefinitions, cert-manager,
+namespace, and the webhook component).
+
+Full installation instructions, including details on how to configure extra
+functionality in Cert-Manager can be found in the
+`Cert-Manager Installation documentation`_.
+
+There is also a kubectl plugin (kubectl cert-manager) that can help you
+to manage cert-manager resources inside your cluster. For installation
+steps, please refer to `Cert-Manager kubectl plugin documentation`_.
+
+Installation can be as simple as::
+
+  > kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.5.4/cert-manager.yaml
+
+Prometheus Stack (optional)
+===========================
+
+Prometheus is an open-source systems monitoring and alerting toolkit with
+an active ecosystem.
+
+Kube Prometheus Stack is a collection of Kubernetes manifests, Grafana
+dashboards, and Prometheus rules combined with documentation and scripts to
+provide easy to operate end-to-end Kubernetes cluster monitoring with
+Prometheus using the Prometheus Operator. As it includes both Prometheus
+Operator and Grafana dashboards, there is no need to set up them separately.
+
+Installation steps
+------------------
+
+The recommended version of kube-prometheus-stack chart for
+Kubernetes 1.19 is 19.x (which is currently the latest major chart version),
+for example 19.0.2.
+
+In order to install Prometheus Stack, you must follow these steps:
+
+- Create the namespace for Prometheus Stack::
+
+    > kubectl create namespace prometheus
+
+- Add the prometheus-community Helm repository::
+
+    > helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
+
+- Update your local Helm chart repository cache::
+
+    > helm repo update
+
+- To install the kube-prometheus-stack Helm chart in latest version::
+
+    > helm install prometheus prometheus-community/kube-prometheus-stack --namespace=prometheus
+
+  To install the kube-prometheus-stack Helm chart in specific version, for example 19.0.2::
+
+    > helm install prometheus prometheus-community/kube-prometheus-stack --namespace=prometheus --version=19.0.2