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dns scripts: add --existing-n offset and on-disk manifest #69

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Merged
meecethereese merged 2 commits into from
May 7, 2026
Merged

dns scripts: add --existing-n offset and on-disk manifest #69

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b00e107
dns scripts: add --existing-n offset and on-disk manifest
May 7, 2026
b6bc433
dns scripts: write manifest to mktemp path, drop cleanup-side rm
May 7, 2026
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36 changes: 24 additions & 12 deletions scripts/setup/dns-httproutes.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ show_usage() {
echo "Options:"
echo " --count <N> (required) Number of HTTPRoutes to create"
echo " --domain <domain> (required) DNS zone domain (e.g. extdns.telescope.test)"
echo " --existing-n <N> Index offset; objects will be numbered (existing-n+1)..(existing-n+count) (default: 0)"
echo " --namespace <ns> Kubernetes namespace (default: default)"
echo " --gateway <name> Parent Gateway name (default: server)"
echo " --gateway-section-name <sec> Parent Gateway listener section name (default: http)"
Expand All @@ -28,6 +29,7 @@ show_usage() {

COUNT=""
DOMAIN=""
EXISTING_N="0"
NAMESPACE="default"
GATEWAY="server"
GATEWAY_SECTION_NAME="http"
Expand All @@ -38,6 +40,7 @@ while [[ $# -gt 0 ]]; do
case "$1" in
--count) COUNT="$2"; shift 2 ;;
--domain) DOMAIN="$2"; shift 2 ;;
--existing-n) EXISTING_N="$2"; shift 2 ;;
--namespace) NAMESPACE="$2"; shift 2 ;;
--gateway) GATEWAY="$2"; shift 2 ;;
--gateway-section-name) GATEWAY_SECTION_NAME="$2"; shift 2 ;;
Expand All @@ -61,6 +64,11 @@ if ! [[ "$COUNT" =~ ^[1-9][0-9]*$ ]]; then
exit 1
fi

if ! [[ "$EXISTING_N" =~ ^(0|[1-9][0-9]*)$ ]]; then
echo "Error: --existing-n must be a non-negative integer (>= 0)"
exit 1
fi

DNS_LABEL='[a-z0-9]([-a-z0-9]*[a-z0-9])?'
if ! [[ "$DOMAIN" =~ ^${DNS_LABEL}(\.${DNS_LABEL})*$ ]]; then
echo "Error: --domain '$DOMAIN' is not a valid DNS subdomain (RFC 1123)"
Expand All @@ -77,18 +85,23 @@ if ! kubectl get service "$SERVICE_NAME" -n "$NAMESPACE" >/dev/null 2>&1; then
exit 1
fi

echo "Creating $COUNT dns-test HTTPRoutes:"
START=$((EXISTING_N + 1))
END=$((EXISTING_N + COUNT))
MANIFEST_FILE="$(mktemp -t dns-httproutes.XXXXXX.yaml)"

echo "Creating $COUNT dns-test HTTPRoutes (indices ${START}..${END}):"
echo " Domain: $DOMAIN"
echo " Namespace: $NAMESPACE"
echo " Gateway: $GATEWAY (section: $GATEWAY_SECTION_NAME)"
echo " Service: $SERVICE_NAME:$SERVICE_PORT"
echo " Manifest file: $MANIFEST_FILE"

MANIFEST=$(
for i in $(seq 1 "$COUNT"); do
if [ "$i" -gt 1 ]; then
printf '%s\n' '---'
fi
cat <<EOF
: > "$MANIFEST_FILE"
for i in $(seq "$START" "$END"); do
if [ "$i" -gt "$START" ]; then
printf '%s\n' '---' >> "$MANIFEST_FILE"
fi
cat <<EOF >> "$MANIFEST_FILE"
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
Expand All @@ -111,10 +124,9 @@ spec:
- name: ${SERVICE_NAME}
port: ${SERVICE_PORT}
EOF
done
)
done

echo "Applying $COUNT HTTPRoutes in a single bulk request..."
echo "$MANIFEST" | kubectl apply --server-side -f -
echo "Applying $COUNT HTTPRoutes from $MANIFEST_FILE in a single bulk request..."
kubectl apply --server-side -f "$MANIFEST_FILE"

echo "Created $COUNT HTTPRoutes with hostnames test-1.${DOMAIN} through test-${COUNT}.${DOMAIN}"
echo "Created $COUNT HTTPRoutes with hostnames test-${START}.${DOMAIN} through test-${END}.${DOMAIN}"
36 changes: 24 additions & 12 deletions scripts/setup/dns-ingresses.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ show_usage() {
echo "Options:"
echo " --count <N> (required) Number of ingresses to create"
echo " --domain <domain> (required) DNS zone domain (e.g. extdns.telescope.test)"
echo " --existing-n <N> Index offset; objects will be numbered (existing-n+1)..(existing-n+count) (default: 0)"
echo " --namespace <ns> Kubernetes namespace (default: default)"
echo " --ingress-class <cls> Ingress class (default: webapprouting.kubernetes.azure.com)"
echo " --service-name <name> Backend service name (default: server)"
Expand All @@ -27,6 +28,7 @@ show_usage() {

COUNT=""
DOMAIN=""
EXISTING_N="0"
NAMESPACE="default"
INGRESS_CLASS="webapprouting.kubernetes.azure.com"
SERVICE_NAME="server"
Expand All @@ -36,6 +38,7 @@ while [[ $# -gt 0 ]]; do
case "$1" in
--count) COUNT="$2"; shift 2 ;;
--domain) DOMAIN="$2"; shift 2 ;;
--existing-n) EXISTING_N="$2"; shift 2 ;;
--namespace) NAMESPACE="$2"; shift 2 ;;
--ingress-class) INGRESS_CLASS="$2"; shift 2 ;;
--service-name) SERVICE_NAME="$2"; shift 2 ;;
Expand All @@ -58,6 +61,11 @@ if ! [[ "$COUNT" =~ ^[1-9][0-9]*$ ]]; then
exit 1
fi

if ! [[ "$EXISTING_N" =~ ^(0|[1-9][0-9]*)$ ]]; then
echo "Error: --existing-n must be a non-negative integer (>= 0)"
exit 1
fi

# RFC 1123 DNS subdomain: labels of [a-z0-9]([a-z0-9-]*[a-z0-9])?, separated by dots.
DNS_LABEL='[a-z0-9]([-a-z0-9]*[a-z0-9])?'
if ! [[ "$DOMAIN" =~ ^${DNS_LABEL}(\.${DNS_LABEL})*$ ]]; then
Expand All @@ -70,18 +78,23 @@ if ! kubectl get service "$SERVICE_NAME" -n "$NAMESPACE" >/dev/null 2>&1; then
exit 1
fi

echo "Creating $COUNT dns-test ingresses:"
START=$((EXISTING_N + 1))
END=$((EXISTING_N + COUNT))
MANIFEST_FILE="$(mktemp -t dns-ingresses.XXXXXX.yaml)"

echo "Creating $COUNT dns-test ingresses (indices ${START}..${END}):"
echo " Domain: $DOMAIN"
echo " Namespace: $NAMESPACE"
echo " Ingress Class: $INGRESS_CLASS"
echo " Service: $SERVICE_NAME:$SERVICE_PORT"
echo " Manifest file: $MANIFEST_FILE"

MANIFEST=$(
for i in $(seq 1 "$COUNT"); do
if [ "$i" -gt 1 ]; then
printf '%s\n' '---'
fi
cat <<EOF
: > "$MANIFEST_FILE"
for i in $(seq "$START" "$END"); do
if [ "$i" -gt "$START" ]; then
printf '%s\n' '---' >> "$MANIFEST_FILE"
fi
cat <<EOF >> "$MANIFEST_FILE"
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
Expand All @@ -103,10 +116,9 @@ spec:
port:
number: ${SERVICE_PORT}
EOF
done
)
done

echo "Applying $COUNT ingresses in a single bulk request..."
echo "$MANIFEST" | kubectl apply --server-side -f -
echo "Applying $COUNT ingresses from $MANIFEST_FILE in a single bulk request..."
kubectl apply --server-side -f "$MANIFEST_FILE"

echo "Created $COUNT ingresses with hostnames test-1.${DOMAIN} through test-${COUNT}.${DOMAIN}"
echo "Created $COUNT ingresses with hostnames test-${START}.${DOMAIN} through test-${END}.${DOMAIN}"
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