Initial commit

.gitignore

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+# ---> Python
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# ---> Vim
+# Swap
+[._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+Sessionx.vim
+
+# Temporary
+.netrwhist
+*~
+# Auto-generated tag files
+tags
+# Persistent undo
+[._]*.un~
+
+# ---> Ansible
+*.retry
+

README.md

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+Role Name
+=========
+
+Setup MariaDB galera cluster - JUST SETUP, do NOT run again!
+
+Requirements
+------------
+
+At least two MariaDB-Servers
+
+Role Variables
+--------------
+
+- None
+
+Dependencies
+------------
+
+- None
+
+Example Playbook
+----------------
+
+    - hosts: db-servers
+      roles:
+         - { role: mariadb-galera }
+
+License
+-------
+
+GPL-2.0-or-later
+
+Author Information
+------------------
+
+Sven Velt <sven-ansiblerole@velt.biz>
+https://git.velt.biz/velt.biz/
+

defaults/main.yml

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+---
+db_packages:
+  - mariadb-server
+  - python3-mysqldb
+  - rsync
+
+db_servicename: mysql
+

meta/main.yml

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+galaxy_info:
+  author: Sven Velt
+  description: Setup MariaDB galera cluster
+  company: velt.biz
+
+  issue_tracker_url: https://git.velt.biz/Ansible/mariadb-galera/issues/
+
+  license: GPL-2.0-or-later
+
+  min_ansible_version: 2.9
+
+  platforms:
+    - name: Ubuntu
+      versions:
+        - focal
+
+  galaxy_tags:
+    - cluster
+    - database
+    - db
+    - galera
+    - mariadb
+

tasks/main.yml

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+---
+- name: Install software
+  package:
+    name: "{{ item }}"
+    state: present
+  with_items: "{{ db_packages }}"
+
+
+- name: "Quick-Fix MariaDB/systemd problems"
+  lineinfile:
+    path: /usr/lib/systemd/system/mariadb.service
+    regexp: "^SendSIGKILL=no"
+    line: "SendSIGKILL=yes"
+    backup: yes
+  register: db_systemd_fix
+  when: ansible_virtualization_type == "lxc"
+
+
+- name: Reload systemd daemon
+  command: /bin/systemctl daemon-reload
+  when: db_systemd_fix is changed
+
+
+- name: Get MariaDB settings
+  mysql_info:
+    filter: settings
+  register: db_settings
+
+
+- name: "Config: Listen on all ip addresses"
+  lineinfile:
+    path: /etc/mysql/mariadb.conf.d/50-server.cnf
+    regexp: "^ *#* *bind-address"
+    line: "bind-address = 0.0.0.0"
+    backup: yes
+
+
+- name: Template galera.cnf
+  template:
+    src: galera.cnf.j2
+    dest: /etc/mysql/conf.d/galera.cnf
+    backup: yes
+
+
+- name: Init Galera cluster
+  block:
+    - name: 'Stop service "{{ db_servicename }}"'
+      service:
+        name: "{{ db_servicename }}"
+        state: stopped
+
+    - name: Create galera cluster
+      command: /usr/bin/galera_new_cluster
+      when: inventory_hostname == groups.db.0
+
+  when: db_settings.settings.wsrep_cluster_address == ""
+
+
+- name: 'Enable service "{{ db_servicename }}"'
+  service:
+    name: "{{ db_servicename }}"
+    state: started
+    enabled: yes
+

templates/galera.cnf.j2

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+[galera]
+binlog_format=ROW
+default-storage-engine=innodb
+innodb_autoinc_lock_mode=2
+bind-address=0.0.0.0
+
+# Galera Provider Configuration
+wsrep_on=ON
+wsrep_provider=/usr/lib/galera/libgalera_smm.so
+
+# Galera Cluster Configuration
+wsrep_cluster_name="webdb_cluster"
+wsrep_cluster_address="gcomm://{% for h in groups['db'] %}{{ hostvars[h]['ansible_default_ipv4'].address }}{% if not loop.last %},{% endif %}{% endfor %}"
+
+# Galera Synchronization Configuration
+wsrep_sst_method=rsync
+
+# Galera Node Configuration
+wsrep_node_address="{{ ansible_facts.default_ipv4.address }}"
+wsrep_node_name="{{ ansible_hostname }}"
+