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ci: dual-stack support for kind cluster #4301

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merged 3 commits into from
Sep 24, 2024
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ci: dual-stack support for kind cluster #4301

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38c75b3
feat: dual-stack support for kind cluster
juwon8891 Sep 22, 2024
3aa9b4d
feat: add ip_family support to create-cluster.sh
juwon8891 Sep 22, 2024
653254d
chore: address_range_v6 to hex
juwon8891 Sep 23, 2024
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35 changes: 29 additions & 6 deletions tools/hack/create-cluster.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -7,11 +7,13 @@ CLUSTER_NAME=${CLUSTER_NAME:-"envoy-gateway"}
METALLB_VERSION=${METALLB_VERSION:-"v0.13.10"}
KIND_NODE_TAG=${KIND_NODE_TAG:-"v1.31.0"}
NUM_WORKERS=${NUM_WORKERS:-""}

IP_FAMILY=${IP_FAMILY:-"ipv4"}

KIND_CFG=$(cat <<-EOM
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
networking:
ipFamily: ${IP_FAMILY}
nodes:
- role: control-plane
EOM
Expand Down Expand Up @@ -53,10 +55,31 @@ kubectl rollout status -n metallb-system deployment/controller --timeout 5m
kubectl rollout status -n metallb-system daemonset/speaker --timeout 5m

# Apply config with addresses based on docker network IPAM.
subnet=$(docker network inspect kind | jq -r '.[].IPAM.Config[].Subnet | select(contains(":") | not)')
# Assume default kind network subnet prefix of 16, and choose addresses in that range.
address_first_octets=$(echo "${subnet}" | awk -F. '{printf "%s.%s",$1,$2}')
address_range="${address_first_octets}.255.200-${address_first_octets}.255.250"
address_ranges=""

if [ "${IP_FAMILY}" = "ipv4" ] || [ "${IP_FAMILY}" = "dual" ]; then
subnet_v4=$(docker network inspect kind | jq -r '.[].IPAM.Config[] | select(.Subnet | contains(":") | not) | .Subnet')
address_prefix_v4=$(echo "${subnet_v4}" | awk -F. '{print $1"."$2"."$3}')
address_range_v4="${address_prefix_v4}.200-${address_prefix_v4}.250"
echo "IPv4 address range: ${address_range_v4}"
address_ranges+="- ${address_range_v4}"
fi

if [ "${IP_FAMILY}" = "ipv6" ] || [ "${IP_FAMILY}" = "dual" ]; then
subnet_v6=$(docker network inspect kind | jq -r '.[].IPAM.Config[] | select(.Subnet | contains(":")) | .Subnet')
ipv6_prefix="${subnet_v6%::*}"
address_range_v6="${ipv6_prefix}::c8-${ipv6_prefix}::fa"
echo "IPv6 address range: ${address_range_v6}"
[ -n "${address_ranges}" ] && address_ranges+="\n"
address_ranges+="- ${address_range_v6}"
fi

if [ -z "${address_ranges}" ]; then
echo "Error: No valid IP ranges found for IP_FAMILY=${IP_FAMILY}"
exit 1
fi

# Apply MetalLB IPAddressPool and L2Advertisement
kubectl apply -f - <<EOF
apiVersion: metallb.io/v1beta1
kind: IPAddressPool
Expand All @@ -65,7 +88,7 @@ metadata:
name: kube-services
spec:
addresses:
- ${address_range}
$(echo -e "${address_ranges}" | sed 's/^/ /')
---
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
Expand Down
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