Microk8s on LXD 2

See https://microk8s.io/docs/high-availability

for i in kub1 kube2 kube3; do
  lxc init ubuntu:20.04 $i --vm -c limits.cpu=4 -c limits.memory=8GB
  lxc config device override $i root size=32GB
  lxc start $i
  lxc exec $i -- snap install microk8s --classic
  lxc exec $i -- printf "alias kubectl='microk8s kubectl'\nalias k='microk8s kubectl'" >> /root/.bashrc
  joincmd=$(lxc exec kub1 -- microk8s add-node | sed -n '2p')
  $($joincmd)
  done

lxc shell kube1

microk8s enable dns helm ingress rbac registry storage

Using Kubectl instead of aliasing microk8s.kubectl

mkdir $HOME/.kube
microk8s config > $HOME/.kube/config
snap install kubectl --classic
kubectl get nodes

openebs jiva

• https://docs.openebs.io/docs/next/prerequisites.html#ubuntu
• https://docs.openebs.io/docs/next/installation.html

systemctl enable --now iscsid

NFS as default storage

NFS Server

nfs server centos 8 with hostname nas in dns

sudo dnf install nfs-utils uuid
systemctl enable --now nfs-server
systemctl status nfs-server
mkdir -p /kub/default-storage 
chmod 0777 /kub/default-storage
mkdir -p /kub/standard-ebf8a3e6-89ba-11eb-9e15-00163e0308c0
chmod 0777 /kub/standard-ebf8a3e6-89ba-11eb-9e15-00163e0308c0

/etc/exports

/kub/default-storage    *(rw,sync,no_subtree_check,insecure,no_root_squash)
/kub/standard-ebf8a3e6-89ba-11eb-9e15-00163e0308c0    *(rw,sync,no_subtree_check,insecure,no_root_squash)
# var/nfs 10.x.x.x/32(rw,sync,no_subtree_check,insecure) 10.x.x.x/32(rw,sync,no_subtree_check,insecure) 10.x.x.x/32(rw,sync,no_subtree_check,insecure)
# /nas/share    *(rw,sync,no_subtree_check,insecure)

NFS Clients on Each Kubernetes Node

Make default storage class (hostpath) an nfs hostpath

sudo apt install -y nfs-client
mkdir /var/snap/microk8s/common/default-storage
echo "nas:/kub/default-storage  /var/snap/microk8s/common/default-storage  nfs" >> /etc/fstab
mount -a
microk8s stop && microk8s start

https://github.com/rancher/local-path-provisioner

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