Example used to setup gitea at git.bertieb.org

Only db password in vars/main.yml needs to be changed, works as-is

createdb/handlers/main.yml

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

createdb/tasks/main.yml

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+---
+- name: Ensure bash, OpenSSl, and libssl are the latest versions
+  apt:
+    pkg:
+      - bash
+      - openssl
+      - libssl-dev
+      - libssl-doc
+    state: latest
+  tags: packages
+
+- name: Install PostgreSQL
+  apt:
+    pkg:
+      - postgresql
+      - postgresql-contrib
+      - libpq-dev
+      - python3-psycopg2
+    state: present
+  tags: packages
+
+- name: Ensure the PostgreSQL service is running
+  service: name=postgresql state=started enabled=yes
+
+- name: Ensure database is created
+  become: yes
+  become_user: postgres
+  postgresql_db: name={{ db_name }}
+             encoding='UTF-8'
+             template='template0'
+             state=present
+             
+- name: Ensure user has access to the database
+  become: yes
+  become_user: postgres
+  postgresql_user: db={{ db_name }}
+               name={{ db_user }}
+               password={{ db_password }}
+               priv=ALL
+               state=present
+
+- name: Ensure user does not have unnecessary privileges
+  become: yes
+  become_user: postgres
+  postgresql_user: name={{ db_user }}
+               role_attr_flags=NOSUPERUSER,NOCREATEDB
+               state=present

setup.yml

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+---
+- name: Create a PostgreSQL DB server
+  hosts: all
+  remote_user: postgres
+  vars_files:
+    - vars/main.yml
+
+  roles:
+  - createdb

vars/main.yml

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+---
+db_user: postgres
+db_name: gitea
+db_password: CHANGEME