Tests: dualstack improvements (knative#2919)

* Make patch-hosts ip version aware

Add A and AAAA records for localtest.me depending on whether
the control plane node has IPv4 and/or IPv6 address.

Signed-off-by: Matej Vašek <[email protected]>

* Make test locabalancer ip version aware

Set MetalLB address pool appropriately with respect to IPv4 and IPv6

Signed-off-by: Matej Vašek <[email protected]>

---------

Signed-off-by: Matej Vašek <[email protected]>

Author: matejvasek

hack/allocate.sh

@@ -128,6 +128,17 @@ dns() {
   echo "${green}✅ DNS${reset}"
 }
 
+arr2yaml() {
+  echo -n '['
+  local e
+  local s=""
+  for e in "$@"; do
+    printf '%s"%s"' "$s" "$e";
+    s=", "
+  done
+  echo -n ']'
+}
+
 loadbalancer() {
   echo "${blue}Installing Load Balancer (Metallb)${reset}"
   $KUBECTL apply -f "https://raw.githubusercontent.com/metallb/metallb/v0.13.7/config/manifests/metallb-native.yaml"
@@ -138,7 +149,22 @@ loadbalancer() {
     --timeout=300s
 
   local kind_addr
+  local kind_addr6
+  local addr_array
+
   kind_addr="$($CONTAINER_ENGINE container inspect func-control-plane | jq '.[0].NetworkSettings.Networks.kind.IPAddress' -r)"
+  kind_addr6="$($CONTAINER_ENGINE container inspect func-control-plane | jq '.[0].NetworkSettings.Networks.kind.GlobalIPv6Address' -r)"
+
+  addr_array=()
+
+  if [[ -n "$kind_addr" ]]; then
+    addr_array+=("$kind_addr/32");
+  fi
+
+  if [[ -n "$kind_addr6" ]]; then
+    addr_array+=("$kind_addr6/128");
+  fi
+
 
   echo "Setting up address pool."
   $KUBECTL apply -f - <<EOF
@@ -148,8 +174,7 @@ metadata:
   name: example
   namespace: metallb-system
 spec:
-  addresses:
-  - ${kind_addr}-${kind_addr}
+  addresses: $(arr2yaml "${addr_array[@]}")
 ---
 apiVersion: metallb.io/v1beta1
 kind: L2Advertisement

hack/patch-hosts.sh

@@ -22,14 +22,34 @@ function patch_hosts() {
   echo "${blue}Configuring Magic DNS${reset}"
 
   local cluster_node_addr
+  local cluster_node_addr6
 
   cluster_node_addr="$(docker container inspect func-control-plane | jq ".[0].NetworkSettings.Networks.kind.IPAddress" -r)"
+  cluster_node_addr6="$(docker container inspect func-control-plane | jq ".[0].NetworkSettings.Networks.kind.GlobalIPv6Address" -r)"
+
+  local a_recs=""
+  local aaaa_recs=""
+
+  if [[ -n $cluster_node_addr ]]; then
+          a_recs="\
+localtest.me.            IN      A       ${cluster_node_addr}\n\
+*.localtest.me.          IN      A       ${cluster_node_addr}\n";
+  fi
+
+  if [[ -n $cluster_node_addr6 ]]; then
+          aaaa_recs="\
+localtest.me.            IN      AAAA    ${cluster_node_addr6}\n\
+*.localtest.me.          IN      AAAA    ${cluster_node_addr6}\n";
+  fi
 
   $KUBECTL patch cm/coredns -n kube-system --patch-file /dev/stdin <<EOF
 {
   "data": {
     "Corefile": ".:53 {\n    errors\n    health {\n       lameduck 5s\n    }\n    ready\n    kubernetes cluster.local in-addr.arpa ip6.arpa {\n       pods insecure\n       fallthrough in-addr.arpa ip6.arpa\n       ttl 30\n    }\n    file /etc/coredns/example.db localtest.me\n    prometheus :9153\n    forward . /etc/resolv.conf {\n       max_concurrent 1000\n    }\n    cache 30\n    loop\n    reload\n    loadbalance\n}\n",
-    "example.db": "; localtest.me test file\nlocaltest.me.            IN      SOA     sns.dns.icann.org. noc.dns.icann.org. 2015082541 7200 3600 1209600 3600\nlocaltest.me.            IN      A       ${cluster_node_addr}\n*.localtest.me.          IN      A       ${cluster_node_addr}\n"
+    "example.db": "; localtest.me test file\n\
+localtest.me.            IN      SOA     sns.dns.icann.org. noc.dns.icann.org. 2015082541 7200 3600 1209600 3600\n\
+$a_recs\
+$aaaa_recs"
   }
 }
 EOF