Initial commit

defaults/main.yml

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+postgresql:
+  allowed_hosts: []

handlers/main.yml

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+- name: restart postgres
+  service: name=postgresql state=restarted

tasks/main.yml

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+- name: install postgres
+  apt:
+    pkg: postgresql
+
+- name: generate pg_hba
+  template:
+    src: pg_hba.conf.j2
+    dest: /etc/postgresql/9.6/main/pg_hba.conf
+    owner: postgres
+    group: postgres
+    mode: 0640
+  notify:
+    - restart postgres

templates/pg_hba.conf.j2

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+{% for item in postgresql.allowed_hosts %}
+{{ item.type | default('host') }}	{{ item.database | default('all') }}	{{ item.user | default('all') }}	{{ item.auth | default('md5') }}
+{% endfor %}
+
+local	all	postgres	peer
+local	all	all		peer
+host	all	all		127.0.0.1/32	md5
+host	all	all		::1/128		md5