commands + output

~ # for i in 0 1 2; do
  k3sup join \
    --host agent-$i \
    --user ubuntu \
    --server-host kubernetes.k3s.local \
    --server-user ubuntu \
    --k3s-channel stable \
    --ssh-key ~cbsd/.ssh/id_rsa
  done
Running: k3sup join
Server IP: kubernetes.k3s.local
K1094729103bf24c9e6fc312577915112324a2a3d940ac670f87cb7d8de8804625f::server:19433d7161596d0dac7d9ec13a5a91e3
[INFO]  Finding release for channel stable
[INFO]  Using v1.19.5+k3s2 as release
[INFO]  Downloading hash https://github.com/rancher/k3s/releases/download/v1.19.5+k3s2/sha256sum-amd64.txt
[INFO]  Downloading binary https://github.com/rancher/k3s/releases/download/v1.19.5+k3s2/k3s
[INFO]  Verifying binary download
[INFO]  Installing k3s to /usr/local/bin/k3s
[INFO]  Creating /usr/local/bin/kubectl symlink to k3s
[INFO]  Creating /usr/local/bin/crictl symlink to k3s
[INFO]  Creating /usr/local/bin/ctr symlink to k3s
[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh
[INFO]  Creating uninstall script /usr/local/bin/k3s-agent-uninstall.sh
[INFO]  env: Creating environment file /etc/systemd/system/k3s-agent.service.env
[INFO]  systemd: Creating service file /etc/systemd/system/k3s-agent.service
[INFO]  systemd: Enabling k3s-agent unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s-agent.service → /etc/systemd/system/k3s-agent.service.
[INFO]  systemd: Starting k3s-agent
Logs: Created symlink /etc/systemd/system/multi-user.target.wants/k3s-agent.service → /etc/systemd/system/k3s-agent.service.

[ repeats for agent-1 and agent-2 ]

~ # ipfw delete 300
~ # ipfw add 300 prob 0.33 fwd 10.0.10.10 ip from any to 10.0.0.2 keep-state
00300 prob 0.330000 fwd 10.0.10.10 ip from any to 10.0.0.2 keep-state :default
~ # ipfw add 301 prob 0.5 fwd 10.0.10.11 ip from any to 10.0.0.2 keep-state
00301 prob 0.500000 fwd 10.0.10.11 ip from any to 10.0.0.2 keep-state :default
~ # ipfw add 302 fwd 10.0.10.12 ip from any to 10.0.0.2 keep-state
00302 fwd 10.0.10.12 ip from any to 10.0.0.2 keep-state :default
~ # kubectl get nodes -o wide
NAME       STATUS   ROLES         AGE     VERSION        INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION     CONTAINER-RUNTIME
agent-0    Ready    <none>        2m43s   v1.19.5+k3s2   10.0.10.20    <none>        Ubuntu 20.04.1 LTS   5.4.0-42-generic   containerd://1.4.3-k3s1
agent-1    Ready    <none>        2m35s   v1.19.5+k3s2   10.0.10.21    <none>        Ubuntu 20.04.1 LTS   5.4.0-42-generic   containerd://1.4.3-k3s1
agent-2    Ready    <none>        2m26s   v1.19.5+k3s2   10.0.10.22    <none>        Ubuntu 20.04.1 LTS   5.4.0-42-generic   containerd://1.4.3-k3s1
server-0   Ready    etcd,master   88m     v1.19.5+k3s2   10.0.10.10    <none>        Ubuntu 20.04.1 LTS   5.4.0-42-generic   containerd://1.4.3-k3s1
server-1   Ready    etcd,master   73m     v1.19.5+k3s2   10.0.10.11    <none>        Ubuntu 20.04.1 LTS   5.4.0-42-generic   containerd://1.4.3-k3s1
server-2   Ready    etcd,master   82m     v1.19.5+k3s2   10.0.10.12    <none>        Ubuntu 20.04.1 LTS   5.4.0-42-generic   containerd://1.4.3-k3s1
~ #

commands.sh

for i in 0 1 2; do
k3sup join \
  --host agent-$i \
  --user ubuntu \
  --server-host kubernetes.k3s.local \
  --server-user ubuntu \
  --k3s-channel stable \
  --ssh-key ~cbsd/.ssh/id_rsa
done
# Remove temporary firewall rule
ipfw delete 300
# Create round-robin firewall rules
ipfw add 300 prob 0.33 fwd 10.0.10.10 ip from any to 10.0.0.2 keep-state
ipfw add 301 prob 0.5 fwd 10.0.10.11 ip from any to 10.0.0.2 keep-state
ipfw add 302 fwd 10.0.10.12 ip from any to 10.0.0.2 keep-state
kubectl get nodes -o wide