Create the wildcard DNS entry for the dedicated LB

When using the dedicated load balancer, we're able to create the
wildcard entries for the OpenShift pods. So this does just that.

Author: tomassedovic

fragments/add_dns_record.sh

@@ -18,7 +18,13 @@ else
     retry yum -y install python2-dns
 fi
 
-HOSTNAME="$(hostname --fqdn)"
+
+NAME="%DNS_ENTRY%"
+
+# If we didn't get an explicit name, use this server's hostname
+if [ -n "$NAME" -a "${NAME:0:1}" = "%" -a "${NAME: -1}" = "%" ]; then
+    NAME="$(hostname)"
+fi
 
 # NOTE: the dot after the hostname is necessary
-/usr/local/bin/update_dns -z "%ZONE%" -s "%DNS_SERVER%" -k "$DNS_UPDATE_KEY" "$HOSTNAME." "%IP_ADDRESS%"
+/usr/local/bin/update_dns -z "%ZONE%" -s "%DNS_SERVER%" -k "$DNS_UPDATE_KEY" "$NAME." "%IP_ADDRESS%"

loadbalancer_dedicated.yaml

@@ -46,6 +46,9 @@ parameters:
       All VMs will be placed in this domain
     type: string
 
+  app_subdomain:
+    type: string
+
   rhn_username:
     description: >
       A valid user with entitlements to RHEL and OpenShift software repos
@@ -238,6 +241,7 @@ resources:
       - config: {get_resource: set_extra_docker_repos}
       - config: {get_resource: host_update}
       - config: {get_resource: add_dns_record}
+      - config: {get_resource: add_wildcard_record}
       - config: {get_resource: lb_boot}
 
   # Compose the FQDN and set the hostname in the cloud-init data structure
@@ -345,6 +349,19 @@ resources:
             '%IP_ADDRESS%': {get_param: floatingip}
           template: {get_file: fragments/add_dns_record.sh}
 
+  add_wildcard_record:
+    type: OS::Heat::SoftwareConfig
+    properties:
+      config:
+        str_replace:
+          params:
+            '%DNS_ENTRY%': {list_join: ["", ["*.", {get_param: app_subdomain}]]}
+            '%ZONE%': {get_param: domain_name}
+            '%DNS_SERVER%': {get_param: [dns_servers, 0]}
+            '%DNS_UPDATE_KEY%': {get_param: dns_update_key}
+            '%IP_ADDRESS%': {get_param: floatingip}
+          template: {get_file: fragments/add_dns_record.sh}
+
 
   # Prepare the host for SSH access for ansible
   lb_boot:

loadbalancer_external.yaml

@@ -48,6 +48,9 @@ parameters:
       All VMs will be placed in this domain
     type: string
 
+  app_subdomain:
+    type: string
+
   rhn_username:
     description: >
       A valid user with entitlements to RHEL and OpenShift software repos

loadbalancer_neutron.yaml

@@ -47,6 +47,9 @@ parameters:
       All VMs will be placed in this domain
     type: string
 
+  app_subdomain:
+    type: string
+
   rhn_username:
     description: >
       A valid user with entitlements to RHEL and OpenShift software repos

loadbalancer_none.yaml

@@ -44,6 +44,9 @@ parameters:
       All VMs will be placed in this domain
     type: string
 
+  app_subdomain:
+    type: string
+
   rhn_username:
     description: >
       A valid user with entitlements to RHEL and OpenShift software repos

openshift.yaml

@@ -979,6 +979,7 @@ resources:
       extra_rhn_pools: {get_param: extra_rhn_pools}
       hostname: {get_param: lb_hostname}
       domain_name: {get_param: domain_name}
+      app_subdomain: {get_param: app_subdomain}
       stack_name: {get_param: 'OS::stack_name'}
       ansible_public_key: {get_attr: [ansible_keys, public_key]}
       fixed_subnet: {get_resource: fixed_subnet}