Kubecon Japan 2025 - Demo

demo.sh

#!/bin/bash
# Prerequisites:

# https://github.com/LionelJouin/cni-dra-driver/tree/kubecon-jp-demo
# make build

# MY_REGISTRY=localhost:5000/cni-dra-driver
# make push-image REGISTRY=$MY_REGISTRY VERSION=latest
# (cd ./deployments/cni-dra-driver/ && kustomize edit set image cni-dra-driver=$MY_REGISTRY/cni-dra-driver:latest)

# kind create cluster --config docs/demo/kind-config.yaml
# kubectl apply -f https://raw.githubusercontent.com/k8snetworkplumbingwg/multus-cni/master/e2e/templates/cni-install.yml.j2
# docker exec -it kind-worker ip link add enp0s10 link eth0 type macvlan mode bridge
# docker exec -it kind-worker2 ip link add enp0s10 link eth0 type macvlan mode bridge
# kubectl apply -k ./deployments/cni-dra-driver/

# asciinema rec demo.cast --overwrite -c ./demo.sh
# asciinema upload demo.cast

print_prompt() {
  local text="$1"
  echo -e "\e[32m~#\e[0m $text"
}

slow_echo() {
  text="$1"
  delay=${2:-0.01}
  echo -en "\e[32m~#\e[0m "
  for (( i=0; i<${#text}; i++ )); do
    echo -n "${text:$i:1}"
    sleep "$delay"
  done
  echo
}

clear

slow_echo "# CNI-DRA-Driver, demo for KEP-4817 and KEP-5075"
slow_echo "# The goal of this demo is to show how CNI-DRA-Driver works with a simple scenario:"

cat <<EOF
+--------------------------------+
| +----------------+             |
| | Pod-A          |     enp0s10 |
| |            +---+         +---+
| |            |   ---10gbps--   --10gbps--
| |       net1 +---+         +---+
| |    10.10.1.x/24|             |
| x1--------Running+         +---+
|                        eth0|   |
| Kind-Worker                +---+
+--------------------------------+

+--------------------------------+
| +----------------+             |
| | Pod-B          |     enp0s10 |
| |            +---+         +---+
| |            |   ---5gbps---   --10gbps--
| |       net1 +---+         +---+
| |    10.10.1.x/24|             |
| x2--------Running+         +---+
|                        eth0|   |
| Kind-Worker2               +---+
+--------------------------------+

+--------------------------------+
|                            +---+
|                        eth0|   |
| Kind-Worker3               +---+
+--------------------------------+

+----------------+
| Pod-B          |
|                |
x1--------Pending+
EOF

slow_echo "# We have 2 workers, each with a 10Gbps enp0s10 NIC + an eth0 NIC, and one worker with only the eth0 NIC."
slow_echo "# We will first create a Pod-A which will request a MACVLAN on top of a enp0s10 NIC with 10 gbps dedicated."
slow_echo "# Then we will create 3 Pod-B which will request MACVLANs on top of a enp0s10 NIC with 5 gbps dedicated for each pod."
slow_echo "# This demo will show that Pod-A will be scheduled on a worker and get its requested MACVLAN."
slow_echo "# This demo will also show that only 2 Pod-B will be scheduled on a worker and get their requested MACVLAN sharing the same enp0s10 NIC."
slow_echo "# The third Pod-B will be pending because there is no more resources available to fulfill its request."

sleep 1

slow_echo "# Here is the current pods running in the cluster:"
slow_echo "kubectl get pods --all-namespaces -o wide"
kubectl get pods --all-namespaces -o wide

sleep 5

clear

slow_echo "# Here is the current state of the nodes in the cluster:"
cat <<EOF
+--------------------------------+
|                                |
|                            +---+
|                    enp0s10 |   --10gbps--
|                            +---+
|                                |
|                            +---+
|                        eth0|   |
| Kind-Worker                +---+
+--------------------------------+

+--------------------------------+
|                                |
|                            +---+
|                    enp0s10 |   --10gbps--
|                            +---+
|                                |
|                            +---+
|                        eth0|   |
| Kind-Worker2                +---+
+--------------------------------+

+--------------------------------+
|                            +---+
|                        eth0|   |
| Kind-Worker3               +---+
+--------------------------------+
EOF

slow_echo "kubectl get nodes"
kubectl get nodes

sleep 1

slow_echo "docker exec -it kind-worker ip -br link show"
docker exec -it kind-worker ip -br link show
slow_echo "docker exec -it kind-worker2 ip -br link show"
docker exec -it kind-worker2 ip -br link show
slow_echo "docker exec -it kind-worker3 ip -br link show"
docker exec -it kind-worker3 ip -br link show

sleep 5
clear # --------------------
sleep 1

slow_echo "# Here are the resource slices from the CNI-DRA-Driver representing the NICs in the cluster:"
slow_echo "kubectl get resourceslice"
kubectl get resourceslice

sleep 1

slow_echo "kubectl get resourceslice kind-worker-cni-dra-driver -o yaml | tail -n +12"
kubectl get resourceslice kind-worker-cni-dra-driver -o yaml | tail -n +12

sleep 1

slow_echo "kubectl get resourceslice kind-worker2-cni-dra-driver -o yaml  | tail -n +12"
kubectl get resourceslice kind-worker2-cni-dra-driver -o yaml  | tail -n +12

sleep 1

slow_echo "kubectl get resourceslice kind-worker3-cni-dra-driver -o yaml | tail -n +12"
kubectl get resourceslice kind-worker3-cni-dra-driver -o yaml | tail -n +12

sleep 5
clear # --------------------
sleep 1

slow_echo "# We now create a Pod-A which will request a MACVLAN on top of a enp0s10 NIC with 10 gbps dedicated."
slow_echo "kubectl apply -f docs/demo/pod-A.yaml"
kubectl apply -f docs/demo/pod-A.yaml

sleep 1

slow_echo "# We now create 3 Pod-B which will request MACVLANs on top of a enp0s10 NIC with 5 gbps dedicated for each pod."
slow_echo "kubectl apply -f docs/demo/deployment-B.yaml"
kubectl apply -f docs/demo/deployment-B.yaml

sleep 5
clear # --------------------
sleep 1

slow_echo "# Here is Pod-A and its ResourceClaim:"
slow_echo "cat docs/demo/pod-A.yaml"
cat docs/demo/pod-A.yaml

sleep 5
clear # --------------------
sleep 1

slow_echo "# Here is the deployment B and its ResourceClaimTemplate:"
slow_echo "cat docs/demo/deployment-B.yaml"
cat docs/demo/deployment-B.yaml

sleep 5
clear # --------------------
sleep 1

slow_echo "kubectl get pods -o wide"
kubectl get pods -o wide

sleep 2

slow_echo "kubectl get resourceclaim"
kubectl get resourceclaim

sleep 2

cat <<EOF
+--------------------------------+
| +----------------+             |
| | Pod-A          |     enp0s10 |
| |            +---+         +---+
| |            |   ---10gbps--   --10gbps--
| |       net1 +---+         +---+
| |    10.10.1.x/24|             |
| x1--------Running+         +---+
|                        eth0|   |
| Kind-Worker                +---+
+--------------------------------+

+--------------------------------+
| +----------------+             |
| | Pod-B          |     enp0s10 |
| |            +---+         +---+
| |            |   ---5gbps---   --10gbps--
| |       net1 +---+         +---+
| |    10.10.1.x/24|             |
| x2--------Running+         +---+
|                        eth0|   |
| Kind-Worker2               +---+
+--------------------------------+

+--------------------------------+
|                            +---+
|                        eth0|   |
| Kind-Worker3               +---+
+--------------------------------+

+----------------+
| Pod-B          |
|                |
x1--------Pending+
EOF
slow_echo "# The demo has been successfully deployed. One of the Pod-B is pending because there is no more resources available to fulfill its request, its resourceclaim is in pending state."

sleep 5
clear # --------------------
sleep 1

slow_echo "kubectl get resourceclaim -o yaml macvlan-enp0s10-attachment-a | tail -n 64"
kubectl get resourceclaim -o yaml macvlan-enp0s10-attachment-a | tail -n 64

sleep 1

slow_echo "# We can now check the resourceclaim status of Pod-A. A new virtual device (sharing enp0s10) has been created and an IP address had been assigned."

sleep 3

slow_echo "# The MACVLAN interface is created in Pod-A with the assigned IP address."
slow_echo "kubectl exec -it demo-a -- ip a"
kubectl exec -it demo-a -- ip a

sleep 5