docs/presentation_kanzone.org

* Hvordan kjøre k8s cluster på hytta for fun and profit!

* Hvordan kjøre k8s cluster på hytta for fun +and profit!+ and savings!

* Hvordan kjøre k8s cluster på hytta for fun +and profit!+ +and savings!+ uh.... and FUN!

[[./images/server.jpg]]

* Men altså... how did we get here?

* Men altså... how did we get here?

[[./images/minecraft.png]]

* Bare-metal og vps!

[[file:images/baremetal.png]]

* Docker! ... og en del nginx og ruter-mikk...

[[file:images/docker.png]]

* wireguard!

[[file:images/docker.png]]

 veldig enkel måte å sette opp vpn på!

* ... er k8s løsningen?

#+ATTR_ORG: :width 900
[[./images/k8s-logo.png]]

 - Distribuert!
 - Config management!
 - Mer enn bare containere!
 - og relevant for jobb!

* Men hvilken distro skal jeg velge?

* Men hvilken distro skal jeg velge?

** standard / kubeadm

 - bare base k8s,
   mangler mange componenter for å faktisk gjøre ting.

** k0s

 - veldig lightweight, må sette opp en del selv.

** Minikube

 - enkelt
 - lager egen vm, kun 1 node

** rancher rke & rke2

 - Rke kjører over docker
 - Rke2 var ikke stabilt når jeg startet

** rancher k3s

 - egentlig laget for edge, men funker ganske greit for
   større ting og har mye ute av boksen!

 - funker i litt mer utradisjonelle k8s miljø 

* Utfordring: NAT

[[file:images/kubeServer.png]]

[[file:images/kubeInternal.png]]

* helm magic!

 =helm install <whatever> -f config.yaml=

  https://artifacthub.io/ docker hub for helm!

* Git-ops & fluxcd!

 Skriv yaml -> commit til git -> *k8s magic* -> deployed!

* Så hva kjører jeg?

 - Nextcloud
 - immich
 - Gitea
 - Drone cicd
 - chat-bots
 - archlinux pakke repo
 - openldap
 - bitwarden (vaultwarden)
 - mail server
 - jellyfin
 - k8s componenter!
   - k3s
   - openebs
   - cert-manager & trust-manager
   - loki / prometheus / grafana
   - container registry
   - stakater-reloader
   - nginx ingress controller
   - FluxCD

* Hva ville jeg gjort anderledes?

 - all config i git fra starten av!
 - bruk gitops tidligere

* Gode ressurser / Ting å google

** Youtube

 - Jeff Geerling
 - TechnoTim
 - Just me and opensource
 - Level1Techs

** Reddit

 - /r/selfhosted
 - /r/DataHoarder
 - /r/homelab
 - /r/HomeServer
 - /r/k3s
 - /r/rancher
 - /r/linux

** StackExchange

** eller, spør meg!

* Demo?

#+begin_src bash :results drawer replace
  k3d cluster delete
  k3d cluster create -p "8081:80@loadbalancer" --agents 2 
#+end_src

#+RESULTS:
:results:
INFO[0000] No clusters found                            
INFO[0000] portmapping '8081:80' targets the loadbalancer: defaulting to [servers:*:proxy agents:*:proxy] 
INFO[0000] Prep: Network                                
INFO[0000] Created network 'k3d-k3s-default'            
INFO[0000] Created image volume k3d-k3s-default-images  
INFO[0000] Starting new tools node...                   
INFO[0000] Pulling image 'ghcr.io/k3d-io/k3d-tools:5.7.4' 
INFO[0001] Creating node 'k3d-k3s-default-server-0'     
INFO[0002] Pulling image 'docker.io/rancher/k3s:v1.30.4-k3s1' 
INFO[0002] Starting node 'k3d-k3s-default-tools'        
INFO[0005] Creating node 'k3d-k3s-default-agent-0'      
INFO[0005] Creating node 'k3d-k3s-default-agent-1'      
INFO[0005] Creating LoadBalancer 'k3d-k3s-default-serverlb' 
INFO[0006] Pulling image 'ghcr.io/k3d-io/k3d-proxy:5.7.4' 
INFO[0008] Using the k3d-tools node to gather environment information 
INFO[0008] HostIP: using network gateway 172.18.0.1 address 
INFO[0008] Starting cluster 'k3s-default'               
INFO[0008] Starting servers...                          
INFO[0008] Starting node 'k3d-k3s-default-server-0'     
INFO[0010] Starting agents...                           
INFO[0010] Starting node 'k3d-k3s-default-agent-0'      
INFO[0010] Starting node 'k3d-k3s-default-agent-1'      
INFO[0019] Starting helpers...                          
INFO[0019] Starting node 'k3d-k3s-default-serverlb'     
INFO[0026] Injecting records for hostAliases (incl. host.k3d.internal) and for 4 network members into CoreDNS configmap... 
INFO[0028] Cluster 'k3s-default' created successfully!  
INFO[0028] You can now use it like this:                
kubectl cluster-info
:end:

#+begin_src bash :results drawer replace
  kubectl get nodes
#+end_src

#+RESULTS:
:results:
NAME                       STATUS   ROLES                  AGE   VERSION
k3d-k3s-default-agent-0    Ready    <none>                 15s   v1.30.4+k3s1
k3d-k3s-default-agent-1    Ready    <none>                 16s   v1.30.4+k3s1
k3d-k3s-default-server-0   Ready    control-plane,master   24s   v1.30.4+k3s1
:end:

#+begin_src bash :results drawer replace
  kubectl get pods -A -o wide
#+end_src

#+RESULTS:
:results:
NAMESPACE     NAME                                      READY   STATUS      RESTARTS   AGE   IP          NODE                       NOMINATED NODE   READINESS GATES
kube-system   coredns-576bfc4dc7-qf4jr                  1/1     Running     0          15s   10.42.1.2   k3d-k3s-default-agent-1    <none>           <none>
kube-system   helm-install-traefik-crd-5d927            0/1     Completed   0          15s   10.42.2.2   k3d-k3s-default-server-0   <none>           <none>
kube-system   helm-install-traefik-dh9mb                0/1     Completed   1          15s   10.42.0.2   k3d-k3s-default-agent-0    <none>           <none>
kube-system   local-path-provisioner-6795b5f9d8-k9hd8   1/1     Running     0          15s   10.42.1.4   k3d-k3s-default-agent-1    <none>           <none>
kube-system   metrics-server-557ff575fb-45mc8           1/1     Running     0          15s   10.42.1.3   k3d-k3s-default-agent-1    <none>           <none>
kube-system   svclb-traefik-f13b85a3-bmsc5              2/2     Running     0          4s    10.42.1.5   k3d-k3s-default-agent-1    <none>           <none>
kube-system   svclb-traefik-f13b85a3-mttkt              2/2     Running     0          4s    10.42.2.3   k3d-k3s-default-server-0   <none>           <none>
kube-system   svclb-traefik-f13b85a3-pprtw              2/2     Running     0          4s    10.42.0.3   k3d-k3s-default-agent-0    <none>           <none>
kube-system   traefik-5fb479b77-csb4k                   1/1     Running     0          4s    10.42.0.4   k3d-k3s-default-agent-0    <none>           <none>
:end:

#+begin_src bash :results drawer replace
  helm repo add podinfo https://stefanprodan.github.io/podinfo

  helm install podinfo podinfo/podinfo --set ingress.enabled=true
#+end_src

#+RESULTS:
:results:
"podinfo" has been added to your repositories
NAME: podinfo
LAST DEPLOYED: Fri Nov 15 00:02:07 2024
NAMESPACE: default
STATUS: deployed
REVISION: 1
NOTES:
1. Get the application URL by running these commands:
  http://podinfo.local/
:end:

#+begin_src bash :results drawer replace
  curl -H 'Host: podinfo.local' localhost:8081
#+end_src

#+RESULTS:
:results:
{
  "hostname": "podinfo-5c7765bf4-c49bd",
  "version": "6.7.1",
  "revision": "6b7aab8a10d6ee8b895b0a5048f4ab0966ed29ff",
  "color": "#34577c",
  "logo": "https://raw.githubusercontent.com/stefanprodan/podinfo/gh-pages/cuddle_clap.gif",
  "message": "greetings from podinfo v6.7.1",
  "goos": "linux",
  "goarch": "amd64",
  "runtime": "go1.23.2",
  "num_goroutine": "8",
  "num_cpu": "16"
}
:end: