K8s Applications mit MicroK8S auf Raspberry PI. Alfred Sabitzer

Чтение книги онлайн.

СКАЧАТЬ

       enabled:

       dashboard # The Kubernetes dashboard

       dns # CoreDNS

       ha-clusalfred@pc1:~$ microk8s status

      microk8s is running

      high-availability: yes

       datastore master nodes: 192.168.0.202:19001 192.168.0.203:19001 192.168.0.204:19001

       datastore standby nodes: 192.168.0.201:19001 192.168.0.205:19001

      addons:

       enabled:

       dashboard # The Kubernetes dashboard

       dns # CoreDNS

       ha-cluster # Configure high availability on the current node

       helm3 # Helm 3 - Kubernetes package manager

       ingress # Ingress controller for external access

       metallb # Loadbalancer for your Kubernetes cluster

       metrics-server # K8s Metrics Server for API access to service metrics

       prometheus # Prometheus operator for monitoring and logging

       rbac # Role-Based Access Control for authorisation

       registry # Private image registry exposed on localhost:5000

       storage # Storage class; allocates storage from host directory

       disabled:

       helm # Helm 2 - the package manager for Kubernetes

       host-access # Allow Pods connecting to Host services smoothly

       linkerd # Linkerd is a service mesh for Kubernetes and other frameworks

       portainer # Portainer UI for your Kubernetes cluster

       traefik # traefik Ingress controller for external access

      alfred@pc1:~$

       Abbildung 7: Registry Clusterdisk

      Das Volume wurde als ClusterDisk angelegt. Die Storageclass longhorn ist als default eingerichtet.

      Das Skript zum Einrichten der Registry ist wie folgt:

      #!/bin/bash

      ############################################################################################

      # $Date: 2021-11-23 21:37:19 +0100 (Di, 23. Nov 2021) $

      # $Revision: 1285 $

      # $Author: alfred $

      # $HeadURL: https://monitoring.slainte.at/svn/slainte/trunk/k8s/k8s/K13_registry.sh $

      # $Id: K13_registry.sh 1285 2021-11-23 20:37:19Z alfred $

      #

      # Schnell-Installation microk8s - Installation praktischer AddOns

      #

      ############################################################################################

      #shopt -o -s errexit #—Terminates the shell script if a command returns an error code.

      shopt -o -s xtrace #—Displays each command before it’s executed.

      shopt -o -s nounset #-No Variables without definition

      # Voraussetzung: Sauber installierte Nodes, Verbundener Cluster

      sname=$(basename "$0")

      app="mikrok8s/install/${sname}"

      pf=\$"Revision: "

      sf=" "\$

      fr="\$Revision: 1285 $"

      revision=${fr#*"$pf"}

      revision=${revision%"$sf"*}

      xd=(`date '+%Y-%m-%d'`)

      wd="${HOME}/copy/${app}/${xd}/r${revision}"

      id="/opt/cluster/${app}/${xd}/r${revision}"

      rm -f -R ${wd}

      mkdir -p ${wd}

      #

      # Zu diesem Zeitpunkt sollte es eine Default-Storage-Class geben, wo das abgelegt wird.

      ansible pc1 -m shell -a 'microk8s enable registry:size=40Gi'

      ansible pc -m shell -a 'microk8s status --wait-ready'

      #

      # Adaptieren der Services

      #

      cat <<EOF > ${wd}/do_registry.sh

      #!/bin/bash

      #

      # \$Date: 2021-11-23 21:37:19 +0100 (Di, 23. Nov 2021) $

      # \$Revision: 1285 $

      # \$Author: alfred $

      # \$HeadURL: https://monitoring.slainte.at/svn/slainte/trunk/k8s/k8s/K13_registry.sh $

      # \$Id: K13_registry.sh 1285 2021-11-23 20:37:19Z alfred $

      #

      # Ändern des Services auf Loadbalancer

      #

      #shopt -o -s errexit #—Terminates the shell script if a command returns an error code.

      shopt -o -s xtrace #—Displays each command before it’s executed.

      shopt -o -s nounset #-No Variables without definition

      # registry - 192.168.0.213

      microk8s kubectl -n container-registry get service registry -o yaml > ${id}/registry-svc.yaml

      sed 's/NodePort/LoadBalancer/' ${id}/registry-svc.yaml > ${id}/new-registry-svc.yaml

      microk8s kubectl apply -f ${id}/new-registry-svc.yaml --validate=false

      EOF

      #

      chmod 755 ${wd}/do_registry.sh

      ansible СКАЧАТЬ