Use elasticsearch_network_host for connection tests if defined (#315)

When `elasticsearch_network_host` is set to something not including
localhost, all connection tests fails.

This uses `elasticsearch_network_host` for connections if it is defined,
and falls back to localhost if not.

(There might be more places this change should be made, but the role
works for me with this fix)

---------

Co-authored-by: Ivar Eriksen <[email protected]>

Author: ivareri

docs/role-elasticsearch.md

@@ -31,7 +31,7 @@ Role Variables
 * *elasticsearch_pamlimits*: Set pam_limits neccessary for Elasticsearch. (Default: `true`)
 * *elasticsearch_check_calculation*: End play in checks (Default: `false`)
 * *elasticsearch_network_host*: You can configure multipe network addresses where the networking is bind to. You can assign IP addresses or interfaces by their names. You can also use elasticsearch internal variabels as it set as default. Example: `"_ens190_,_local_"` (Default: `"_local_,"_site_"`) (Optional; if not defined `default` is used)
-
+* *elasticsearch_api_host*: Hostname or IP elasticsearch is listening on. Only used for connection checks by ansible role. (Default: `localhost`)
 * *elasticsearch_extra_config*: You can set additional configuration in YAML-notation as you would write in the `elasaticsearch.yml`. Example:
 
 ```YAML

roles/elasticsearch/defaults/main.yml

@@ -22,6 +22,7 @@ elasticsearch_conf_dir: "/etc/elasticsearch/"
 elasticsearch_config_jvm: "jvm.options.j2"
 elasticsearch_user: elasticsearch
 elasticsearch_group: elasticsearch
+elasticsearch_api_host: localhost
 
 # JVM custom parameters
 elasticsearch_java_home: ''

roles/elasticsearch/tasks/elasticsearch-security.yml

@@ -391,7 +391,7 @@
 
 - name: Check for API with bootstrap password
   ansible.builtin.uri:
-    url: "{{ elasticsearch_http_protocol }}://localhost:{{ elasticstack_elasticsearch_http_port }}"
+    url: "{{ elasticsearch_http_protocol }}://{{ elasticsearch_api_host }}:{{ elasticstack_elasticsearch_http_port }}"
     user: elastic
     password: "{{ elasticsearch_bootstrap_pw }}"
     validate_certs: false
@@ -410,7 +410,7 @@
 
 - name: Check for cluster status with bootstrap password
   ansible.builtin.uri:
-    url: "{{ elasticsearch_http_protocol }}://localhost:{{ elasticstack_elasticsearch_http_port }}/_cluster/health?pretty"
+    url: "{{ elasticsearch_http_protocol }}://{{ elasticsearch_api_host }}:{{ elasticstack_elasticsearch_http_port }}/_cluster/health?pretty"
     user: elastic
     password: "{{ elasticsearch_bootstrap_pw }}"
     validate_certs: false
@@ -437,7 +437,7 @@
 
 - name: Check for API availability with elastic password
   ansible.builtin.uri:
-    url: "{{ elasticsearch_http_protocol }}://localhost:{{ elasticstack_elasticsearch_http_port }}"
+    url: "{{ elasticsearch_http_protocol }}://{{ elasticsearch_api_host }}:{{ elasticstack_elasticsearch_http_port }}"
     user: elastic
     password: "{{ elasticstack_password.stdout }}"
     validate_certs: false
@@ -466,7 +466,7 @@
         curl
         -k
         -X PUT
-        "{{ elasticsearch_http_protocol }}://elastic:{{ elasticstack_password.stdout }}@localhost:9200/_cluster/settings"
+        "{{ elasticsearch_http_protocol }}://elastic:{{ elasticstack_password.stdout }}@{{ elasticsearch_api_host }}:9200/_cluster/settings"
         -H 'Content-Type: application/json' -d
         '
         {
@@ -488,7 +488,7 @@
 
 - name: Check for cluster status with elastic password
   ansible.builtin.uri:
-    url: "{{ elasticsearch_http_protocol }}://localhost:{{ elasticstack_elasticsearch_http_port }}/_cluster/health?pretty"
+    url: "{{ elasticsearch_http_protocol }}://{{ elasticsearch_api_host }}:{{ elasticstack_elasticsearch_http_port }}/_cluster/health?pretty"
     user: elastic
     password: "{{ elasticstack_password.stdout }}"
     validate_certs: false

roles/elasticsearch/tasks/main.yml

@@ -222,7 +222,7 @@
   block:
     - name: Check for cluster status without security
       ansible.builtin.uri:
-        url: "http://localhost:{{ elasticstack_elasticsearch_http_port }}/_cluster/health?pretty"
+        url: "http://{{ elasticsearch_api_host }}:{{ elasticstack_elasticsearch_http_port }}/_cluster/health?pretty"
       register: elasticsearch_cluster_status
       ignore_errors: "{{ ansible_check_mode }}"
       until: elasticsearch_cluster_status.json.status == "green"

roles/elasticsearch/tasks/wait_for_instance.yml

@@ -2,7 +2,7 @@
 
 - name: Wait for instance
   ansible.builtin.wait_for:
-    host: "{{ hostvars[item].ansible_default_ipv4.address }}"
+    host: "{{ elasticsearch_api_host }}"
     port: "{{ elasticstack_elasticsearch_http_port }}"
     timeout: 600
   tags: