changed links first progress

apps/argocd.md

@@ -1,20 +1,20 @@
 # Argo CD
-**Argo CD** is a declarative, GitOps continuous delivery tool for **Kubernetes ([[kubernetes]])**. It allows application definitions, configurations, and environments should be declarative and version controlled. Application deployment and lifecycle management should be automated, auditable, and easy to understand.
+**Argo CD** is a declarative, GitOps continuous delivery tool for **[Kubernetes](kubernetes/kubernetes.md). It allows application definitions, configurations, and environments should be declarative and version controlled. Application deployment and lifecycle management should be automated, auditable, and easy to understand.
 
 Documentation & Project Homepage: [Argo CD Docs](https://argo-cd.readthedocs.io/en/stable/)
 
 ---
 ## Installation
 
-1. Install Argo CD on a **Kubernetes ([[kubernetes]])** Cluster, using **kubectl ([[kubectl]])**.
+1. Install Argo CD on a **[Kubernetes](kubernetes/kubernetes.md) Cluster, using [kubectl](kubernetes/kubectl)**.
 
 ```bash
 kubectl create namespace argocd
 
 kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
 ```
 
-2. Add **Traefik IngressRoute ([[traefik]])**. 
+2. Add **[Traefik](apps/traefik.md) IngressRoute. 
 
 ```yaml
 apiVersion: traefik.containo.us/v1alpha1
@@ -63,7 +63,7 @@ kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.pas
 
 1. Create a github token: https://github.com/settings/tokens
 
-2. Add new repository in ArgoCD via **kubectl ([[kubectl]])** or the GUI
+2. Add new repository in ArgoCD via **[kubectl](kubernetes/kubectl) or the GUI
 
 ```yaml
 apiVersion: v1  

apps/bind9.md

@@ -1,13 +1,13 @@
 # Bind9
 
-Bind9 is an open-source fully-featured DNS ([[dns]]) system. 
+Bind9 is an open-source fully-featured [DNS](networking/dns) system. 
 
 Project Homepage: https://www.isc.org/bind/
 
 ---
 ## Installation
 
-ISC provides executables for Windows and packages for Ubuntu ([[ubuntu]]) and CentOS ([[centos]]) and Fedora ([[fedora]]) and Debian ([[debian]]) - BIND 9 ESV, Debian - BIND 9 Stable, Debian - BIND 9 Development version. Most operating systems also offer BIND 9 packages for their users. These may be built with a different set of defaults than the standard BIND 9 distribution, and some of them add a version number of their own that does not map exactly to the BIND 9 version.
+ISC provides executables for Windows and packages for [Ubuntu](linux/distros/ubuntu.md), [CentOS](linux/distros/centos.md), [Fedora](linux/distros/fedora.md)  and [Debian](linux/distros/debian.md) - BIND 9 ESV, Debian - BIND 9 Stable, Debian - BIND 9 Development version. Most operating systems also offer BIND 9 packages for their users. These may be built with a different set of defaults than the standard BIND 9 distribution, and some of them add a version number of their own that does not map exactly to the BIND 9 version.
 
 
 ### Ubuntu Linux
@@ -21,7 +21,7 @@ sudo apt install bind9
 
 ### Ubuntu Docker
 
-As part of the [Long Term Supported OCI Images](https://ubuntu.com/security/docker-images), Canonical offers Bind9 as a hardened and maintained Docker Docker ([[docker]]).
+As part of the [Long Term Supported OCI Images](https://ubuntu.com/security/docker-images), Canonical offers Bind9 as a hardened and maintained [Docker](docker/docker.md).
 
 ```sh
 docker run -d --name bind9-container -e TZ=UTC -p 30053:53 ubuntu/bind9:9.18-22.04_beta
@@ -86,7 +86,7 @@ www        IN      A       192.168.254.7
 
 #### SOA (Start of Authority)
 
-A start of authority record ([[soa-record]]) is a type of resource record in the Domain Name System (DNS) containing administrative information about the zone, especially regarding zone transfers. The SOA record format is specified in RFC 1035.
+A start of authority record is a type of resource record in the Domain Name System ([DNS](networking/dns.md)) containing administrative information about the zone, especially regarding zone transfers. The SOA record format is specified in RFC 1035.
 
 ```conf
 @         IN      SOA   ns1.domain.tld. hostmaster.domain.tld. (

apps/cert-manager.md

@@ -1,5 +1,5 @@
 # Cert-Manager
-Cert-manager adds certificates and certificate issuers as resource types in **Kubernetes ([[kubernetes]])** clusters, and simplifies the process of obtaining, renewing and using those certificates.
+Cert-manager adds [certificates](misc/ssl-certs) and certificate issuers as resource types in [Kubernetes Clusters](kubernetes/kubernetes.md), and simplifies the process of obtaining, renewing and using those [certificates](misc/ssl-certs).
 
 Documentation & Project Homepage: [Cert-Manager Docs](https://cert-manager.io/docs/)
 
@@ -8,7 +8,7 @@ Documentation & Project Homepage: [Cert-Manager Docs](https://cert-manager.io/do
 
 ### Upload existing CA.key and CA.crt files (Option 1)
 
-1. Create a self-signed CA ([[ssl-certs]]) creating a ca.key (private-key) and ca.crt (certificate)
+1. Create a self-signed CA creating a ca.key (private-key) and ca.crt (certificate)
 
 (ca.key)
 ```bash

apps/longhorn.md

@@ -1,5 +1,5 @@
 # Longhorn
-Longhorn is a lightweight, reliable and easy-to-use distributed block storage system for **Kubernetes ([[kubernetes]]).
+Longhorn is a lightweight, reliable and easy-to-use distributed block storage system for [Kubernetes](kubernetes/kubernetes.md).
 
 Project Homepage: [Longhorn Homepage](https://longhorn.io)
 Documentation: [Longhorn Docs](https://longhorn.io/docs/)

apps/portainer.md

@@ -1,5 +1,5 @@
 # Portainer
-Easily deploy, configure and secure containers in minutes on **Docker ([[docker]])**, **Kubernetes ([[kubernetes]])**, Swarm and Nomad in any cloud, datacenter or device.
+Easily deploy, configure and secure containers in minutes on [Docker](docker/docker.md), [Kubernetes](kubernetes/kubernetes.md), Swarm and Nomad in any cloud, datacenter or device.
 
 Project Homepage: [Portainer](https://www.portainer.io)
 Documentation: [Portainer Docs](http://documentation.portainer.io)

apps/rancher.md

@@ -1,5 +1,5 @@
 # Rancher
-**Rancher**, the open-source multi-cluster orchestration platform, lets operations teams deploy, manage and secure enterprise **Kubernetes ([[kubernetes]])**.
+Rancher, the open-source multi-cluster orchestration platform, lets operations teams deploy, manage and secure enterprise [Kubernetes](kubernetes/kubernetes.md).
 
 Project Homepage: [Rancher Homepage](https://www.rancher.com)
 

apps/tailscale.md

@@ -1,5 +1,5 @@
 # Tailscale
-**Tailscale** is a zero config **VPN ([[vpn]])** for building secure networks, powered by **WireGuard ([[wireguard]])**. Install on any device in minutes. Remote access from any network or physical location.
+Tailscale is a zero config [VPN](networking/vpn.md) for building secure networks, powered by [wireguard](networking/wireguard.md). Install on any device in minutes. Remote access from any network or physical location.
 
 Project Homepage: https://tailscale.com
 

apps/traefik.md

@@ -1,5 +1,5 @@
 # Traefik
-Traefik is an open-source Edge Router for **Docker ([[docker]])**, and **Kubernetes ([[kubernetes]])** that makes publishing your services a fun and easy experience. It receives requests on behalf of your system and finds out which components are responsible for handling them.
+Traefik is an open-source Edge Router for [Docker](docker/docker.md), and [Kubernetes](kubernetes/kubernetes.md) that makes publishing your services a fun and easy experience. It receives requests on behalf of your system and finds out which components are responsible for handling them.
 
 ---
 ## Dashboard and API

cloud/provider/digitalocean.md

@@ -0,0 +1,2 @@
+# DigitalOcean
+

databases/mysql.md

@@ -0,0 +1 @@
+# MySQL

databases/sqlite.md

@@ -2,7 +2,7 @@
 
 SQLite is a relational database contained in a C library. In contrast to many other databases, SQLite is not a client-server database engine. Rather, it's embedded into an end program.
 
-SQLite generally follows the PostgreSQL ([[postgres]]) syntax but does not enforce type checking.
+SQLite generally follows the [PostgreSQL](databases/postgres.md) syntax but does not enforce type checking.
 
 You can open a SQLite Database with `sqlite3 <filename>` directly.
 

tools/helm.md → kubernetes/helm.md

@@ -1,4 +1,5 @@
-# Helm Cheat-Sheet
+# Helm
+
 ## Repository Management
 COMMAND | DESCRIPTION
 ---|---

kubernetes/k3s.md

@@ -1,18 +1,119 @@
 # K3S
-Lightweight Kubernetes ([[kubernetes]]). Production ready, easy to install, half the memory, all in a binary less than 100 MB.
+Lightweight [Kubernetes](kubernetes/kubernetes.md). Production ready, easy to install, half the memory, all in a binary less than 100 MB.
 
 Project Homepage: [K3s.io](https://www.k3s.io/)
 Documentation: [K3s Documentation](https://docs.k3s.io/)
 
 ---
 ## Installation
-To install k3s, you can follow different approaches.
 
-**K3s with external DB ([[k3s-install-ha-externaldb]])** - Set up an HA K3s cluster backed by an external datastore such as MySQL, PostgreSQL, or etcd.
+To install k3s, you can follow different approaches like setting up k3s with an **external database**, **embedded database**, or as a **single node**.
 
-**K3s with embedded DB ([[k3s-install-ha-embeddeddb]])** - Set up an HA K3s cluster that leverages a built-in distributed database.
 
-**K3s single node** ([[k3s-install-single]]) -Set up K3s as a single node installation.
+### K3s with external DB
+
+Set up an HA K3s cluster backed by an external datastore such as MySQL, PostgreSQL, or etcd.
+
+#### Install Database
+
+Install [MariaDB](databases/mariadb.md).
+
+#### Install Servers
+```bash
+curl -sfL https://get.k3s.io | sh -s - server \
+--token=YOUR-SECRET \
+--datastore-endpoint='mysql://user:pass@tcp(ipaddress:3306)/dbname' \
+--node-taint CriticalAddonsOnly=true:NoExecute \
+--tls-san your-dns-name --tls-san your-lb-ip-address
+```
+
+#### Node-Taint
+
+By default, server nodes will be schedulable and thus your workloads can get launched on them. If you wish to have a dedicated control plane where no user workloads will run, you can use taints. The node-taint parameter will allow you to configure nodes with taints, for example `--node-taint CriticalAddonsOnly=true:NoExecute`.
+
+#### SSL Certificates
+
+To avoid certificate errors in such a configuration, you should install the server with the `--tls-san YOUR_IP_OR_HOSTNAME_HERE` option. This option adds an additional hostname or IP as a Subject Alternative Name in the TLS cert, and it can be specified multiple times if you would like to access via both the IP and the hostname.
+
+#### Get a registered Address
+
+TODO: WIP
+
+#### Install Agents
+
+TODO: WIP
+
+```bash
+curl -sfL https://get.k3s.io | sh -s - agent \
+--server https://your-lb-ip-address:6443 \
+--token YOUR-SECRET
+```
+
+
+### K3s with embedded DB
+
+Set up an HA K3s cluster that leverages a built-in distributed database.
+
+TODO: WIP
+
+#### Install first Server
+
+TODO: WIP
+
+```bash
+curl -sfL https://get.k3s.io | sh -s - server \
+--token=YOUR-SECRET \
+--tls-san your-dns-name --tls-san your-lb-ip-address \
+--cluster-init
+```
+
+To avoid certificate errors in such a configuration, you should install the server with the `--tls-san YOUR_IP_OR_HOSTNAME_HERE` option. This option adds an additional hostname or IP as a Subject Alternative Name in the TLS cert, and it can be specified multiple times if you would like to access via both the IP and the hostname.
+
+#### Install additional Servers
+
+TODO: WIP
+
+```bash
+curl -sfL https://get.k3s.io | sh -s - server \
+--token=YOUR-SECRET \
+--tls-san your-dns-name --tls-san your-lb-ip-address \
+--server https://IP-OF-THE-FIRST-SERVER:6443
+```
+
+The `--cluster-init` initializes an HA Cluster with an embedded etcd database. The fault tolerance requires an odd number, minimum three, nodes to function.
+
+Total Number of nodes | Failed Node Tolerance
+---|---
+1|0
+2|0
+3|1
+4|1
+5|2
+6|2
+...|...
+
+#### Get a registered Address
+
+To achieve a high-available scenario you also need to load balance incoming connections between the server nodes.
+
+TODO: WIP
+
+#### Install Agents
+
+You can still add additional nodes without a server function to this cluster.
+
+```bash
+curl -sfL https://get.k3s.io | sh -s - agent \
+--server https://your-lb-ip-address:6443 \
+--token YOUR-SECRET
+```
+
+
+### K3s single node
+
+Set up K3s as a single node installation.
+
+TODO: WIP
 
 ---
 ## Manage K3S

kubernetes/k9s.md

@@ -1,5 +1,6 @@
 # K9s
-K9s is a command line interface to easy up managing Kubernetes([[kubernetes]]) clusters.
+
+K9s is a command line interface to easy up managing [Kubernetes Clusters](kubernetes/kubernetes.md).
 
 Core features of k9s are for instance:
 - Editing of resource manifests
@@ -8,18 +9,12 @@ Core features of k9s are for instance:
 
 More information and current releases of k9s, can be found on their [Github repository](https://github.com/derailed/k9s).
 
-**Screenshots:**
-
-<img src="https://github.com/derailed/k9s/blob/master/assets/screen_po.png?raw=true"/>
-<img src="https://github.com/derailed/k9s/blob/master/assets/screen_logs.png?raw=true"/>
-<img src="https://github.com/derailed/k9s/blob/master/assets/screen_dp.png?raw=true"/>
-
 ---
 ## Installation
 
 ### On Linux
 
-1. Find and download the latest release
+#### Find and download the latest release
 
 Check the release page [here](https://github.com/derailed/k9s/releases) and search for the
 fitting package type (e.g. Linux_x86_64). Copy the link to the archive of your choice.
@@ -30,7 +25,8 @@ wget https://github.com/derailed/k9s/releases/download/v0.26.6/k9s_Linux_x86_64.
 tar -xvf k9s_Linux_x86.tar.gz
 ```
 
-2. Install k9s
+#### Install k9s
+
 ```bash
 sudo install -o root -g root -m 0755 k9s /usr/local/bin/k9s
 ```