Rework inventory all by real groups' vars

* Leave all.yml to keep only optional vars
* Store groups' specific vars by existing group names
* Fix optional vars casted as mandatory (add default())
* Fix missing defaults for an optional IP var
* Relink group_vars for terraform to reflect changes

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>

inventory/group_vars/etcd.yml

@@ -0,0 +1,38 @@
+## Required for bootstrap-os/preinstall/download roles and setting facts 
+# Valid bootstrap options (required): ubuntu, coreos, centos, none                                                                        
+bootstrap_os: none
+
+# Directory where the binaries will be installed
+bin_dir: /usr/local/bin
+docker_bin_dir: /usr/bin
+
+# Where the binaries will be downloaded.
+# Note: ensure that you've enough disk space (about 1G)
+local_release_dir: "/tmp/releases"
+# Random shifts for retrying failed ops like pushing/downloading
+retry_stagger: 5
+
+# Settings for containerized control plane (etcd/secrets)
+etcd_deployment_type: docker
+cert_management: script
+vault_deployment_type: docker
+
+kube_service_addresses: 10.233.0.0/18 
+kube_apiserver_port: 443 # (https)
+kube_apiserver_insecure_port: 8080 # (http)
+
+# DNS configuration.
+# Kubernetes cluster name, also will be used as DNS domain
+cluster_name: cluster.local
+# Subdomains of DNS domain to be resolved via /etc/resolv.conf for hostnet pods
+ndots: 2
+# Can be dnsmasq_kubedns, kubedns or none
+dns_mode: dnsmasq_kubedns
+# Can be docker_dns, host_resolvconf or none
+resolvconf_mode: docker_dns
+# Deploy netchecker app to verify DNS resolve as an HTTP service
+deploy_netchecker: false
+# Ip address of the kubernetes skydns service                                                                                               
+skydns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') }}"
+dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') }}"
+dns_domain: "{{ cluster_name }}"