fix: Add IPv6 EKS subnets to to Skipper healthz routes

Author: ponimas

cluster/manifests/skipper/deployment.yaml

@@ -323,20 +323,22 @@ spec:
           - "-forwarded-headers=X-Forwarded-For,X-Forwarded-Proto=https,X-Forwarded-Port=443"
           - '-forwarded-headers-exclude-cidrs={{ .cluster_internal_cidrs | join "," }}'
 {{ end }}
-          - "-inline-routes"
-          - |
-            kube__healthz_down: Path("/kube-system/healthz")
-              && Shutdown()
-              && SourceFromLast("10.0.0.0/8", "192.168.0.0/16", "172.16.0.0/12", "127.0.0.1/8", "fd00::/8", "::1/128")
-              -> disableAccessLog()
-              -> status(503)
-              -> <shunt>;
-            kube__healthz_up: Path("/kube-system/healthz")
-              && SourceFromLast("10.0.0.0/8", "192.168.0.0/16", "172.16.0.0/12", "127.0.0.1/8", "fd00::/8", "::1/128")
-              -> disableAccessLog()
-              -> status(200)
-              -> <shunt>;
-            {{ .Cluster.ConfigItems.skipper_ingress_inline_routes }};
+          - >-
+            -inline-routes=
+            kube__healthz_down:
+            Path("/kube-system/healthz") &&
+            Shutdown() &&
+            SourceFromLast("10.0.0.0/8", "192.168.0.0/16", "172.16.0.0/12", "127.0.0.1/8", "fd00::/8", "::1/128"{{- if and (eq .Cluster.Provider "zalando-eks") (eq .Cluster.ConfigItems.eks_ip_family "ipv6")}}{{ range $ip := split .Values.subnet_ipv6_cidrs "," }},"{{ $ip }}"{{ end }}{{- end }})
+            -> disableAccessLog()
+            -> status(503)
+            -> <shunt>;
+            kube__healthz_up:
+            Path("/kube-system/healthz") &&
+            SourceFromLast("10.0.0.0/8", "192.168.0.0/16", "172.16.0.0/12", "127.0.0.1/8", "fd00::/8", "::1/128"{{- if and (eq .Cluster.Provider "zalando-eks") (eq .Cluster.ConfigItems.eks_ip_family "ipv6")}}{{ range $ip := split .Values.subnet_ipv6_cidrs "," }},"{{ $ip }}"{{ end }}{{- end }})
+            -> disableAccessLog()
+            -> status(200)
+            -> <shunt>;
+            {{ .Cluster.ConfigItems.skipper_ingress_inline_routes }}
 
 {{ if .Cluster.ConfigItems.skipper_ingress_health_check_options }}
           - "-passive-health-check={{ .Cluster.ConfigItems.skipper_ingress_health_check_options }}"