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How to implement

well, you either implement with rancher (assuming you've set up rancher somewhere, e.g. DO), or with microk8s.

microk8s

## basics

in microk8s, enable:

  • dashboard
  • dns
  • metallb:10.100.0.200-10.100.0.254
  • ingress

store kubectl config:

cd $HOME
mkdir .kube
cd .kube
microk8s config > config

alias kubectl - add to ~/.bash_aliases

alias kubectl='microk8s kubectl'

cert manager

install cert-manger from helm

helm repo add jetstack https://charts.jetstack.io
helm repo update
helm install   cert-manager jetstack/cert-manager   --namespace cert-manager   --create-namespace  --set installCRDs=true

install cluster issuer for cert-manager

longhorn

if implementing Longhorn on Microk8s remember that you need to provide the kubelet path because it's in a non-standard path, and i've mounted a separate drive at /mnt/longhorn

microk8s kubectl create namespace longhorn-system
# for testing use "/tmp/longhorn" as storage location
microk8s helm3 install longhorn longhorn/longhorn --namespace longhorn-system \
  --set defaultSettings.defaultDataPath="/mnt/longhorn" \
  --set csi.kubeletRootDir="/var/snap/microk8s/common/var/lib/kubelet"

read longhorn-aws-secret.yml to fetch the AWS backup secret and store it install longhorn-ingress.yml longhorn backup config:

  • backup target: s3://@/ e.g. s3://longhorn-bucket@eu-west-2/
  • backup target credential secret: aws-secret

NFS

install CSI driver for NFS: https://microk8s.io/docs/nfs

microk8s enable helm3
microk8s helm3 repo add csi-driver-nfs https://raw.githubusercontent.com/kubernetes-csi/csi-driver-nfs/master/charts
microk8s helm3 repo update
microk8s helm3 install csi-driver-nfs csi-driver-nfs/csi-driver-nfs \
    --namespace kube-system \
    --set kubeletDir=/var/snap/microk8s/common/var/lib/kubelet
microk8s kubectl wait pod --selector app.kubernetes.io/name=csi-driver-nfs --for condition=ready --namespace kube-system

dashboard

ignore default microk8s kubectl describe secret -n kube-system microk8s-dashboard-token retrieve dashbaord token with microk8s kubectl create token default --duration 87600h install dashboard-ingress.yml

downloads

create downloads namespace:

kubectl create namespace downloads