From 1d782e22e68fbe617357519af519c98f65ccc8bb Mon Sep 17 00:00:00 2001
From: phil <phil@systemausfall.org>
Date: Fri, 1 Jan 2021 17:01:44 +0000
Subject: [PATCH] Rolle zur Installation und Konfiguration eines
 MariaDB-Servers

---
 defaults/main.yml          |  8 ++++++++
 handlers/main.yml          |  6 ++++++
 meta/main.yml              | 10 ++++++++++
 tasks/main.yml             |  6 ++++++
 tasks/munin.yml            | 39 ++++++++++++++++++++++++++++++++++++++
 tasks/packages.yml         | 13 +++++++++++++
 templates/munin-mariadb.j2 |  4 ++++
 7 files changed, 86 insertions(+)
 create mode 100644 defaults/main.yml
 create mode 100644 handlers/main.yml
 create mode 100644 meta/main.yml
 create mode 100644 tasks/main.yml
 create mode 100644 tasks/munin.yml
 create mode 100644 tasks/packages.yml
 create mode 100644 templates/munin-mariadb.j2

diff --git a/defaults/main.yml b/defaults/main.yml
new file mode 100644
index 0000000..c063c3d
--- /dev/null
+++ b/defaults/main.yml
@@ -0,0 +1,8 @@
+---
+# defaults file for mariadb
+
+munin_sql_user: munin
+munin_sql_password: za8x5sECY6pP2GWdR36UKYP7tHFodvRLyr6f5wAt7D
+mysql_server_config_file:  /etc/mysql/mariadb.conf.d/50-server.cnf 
+mysql_socket: /var/run/mysqld/mysqld.sock
+
diff --git a/handlers/main.yml b/handlers/main.yml
new file mode 100644
index 0000000..11dbdd3
--- /dev/null
+++ b/handlers/main.yml
@@ -0,0 +1,6 @@
+---
+- name: restart munin-node
+  service: name=munin-node state=restarted
+
+- name: restart mysql
+  service: name=mariadb state=restarted
diff --git a/meta/main.yml b/meta/main.yml
new file mode 100644
index 0000000..0550f5c
--- /dev/null
+++ b/meta/main.yml
@@ -0,0 +1,10 @@
+galaxy_info:
+  author: systemausfall.org
+  description: Role to setup MariaDB server
+  company: Sense.Lab
+  license: GPLv3
+  min_ansible_version: 2.9
+  plaforms:
+    - name: Debian
+      versions:
+        - Buster
diff --git a/tasks/main.yml b/tasks/main.yml
new file mode 100644
index 0000000..de0f544
--- /dev/null
+++ b/tasks/main.yml
@@ -0,0 +1,6 @@
+---
+# tasks file for mariadb
+
+- import_tasks: packages.yml
+- import_tasks: munin.yml
+
diff --git a/tasks/munin.yml b/tasks/munin.yml
new file mode 100644
index 0000000..0a8c392
--- /dev/null
+++ b/tasks/munin.yml
@@ -0,0 +1,39 @@
+- name: "Munin: sql-Nutzer anlegen"
+  mysql_user:
+    name: "{{ munin_sql_user }}"
+    password: "{{ munin_sql_password }}"
+    priv: '*.*:PROCESS,REPLICATION CLIENT'
+    state: present
+    login_unix_socket: "{{ mysql_socket }}"
+    login_user: root
+
+- name: "Munin: Ersetze MariaDB-Zugangsdaten"
+  template:
+    src: templates/munin-mariadb.j2
+    dest: /etc/munin/plugin-conf.d/zzz-mariadb
+  notify: restart munin-node
+
+- name: "Munin: Aktiviere mysql-Plugin"
+  command: munin-node-configure --shell | grep mysql_ | sh
+  # Ausgabe von fehlerhaften Plugins (exit 1) ignorieren
+  ignore_errors: yes
+  notify: restart munin-node
+
+- name: "Munin: Aktiviere slowlog"
+  lineinfile:
+    path: "{{ mysql_server_config_file }}"
+    insertafter: ^# Enable the slow query
+    line: 'slow_query_log = 1'
+  notify: restart mysql
+
+- name: "Munin: Konfiguriere slowlog"
+  lineinfile:
+    path: "{{ mysql_server_config_file }}"
+    regexp: "{{ item.regexp }}"
+    line: "{{ item.line }}"
+  with_items:
+    - { regexp: '^#slow_query_log_file', line: 'slow_query_log_file = /var/log/mysql/mariadb-slow.log' }
+    - { regexp: '^#long_query_time', line: 'long_query_time = 10' }
+    - { regexp: '^#log_slow_rate_limit', line: 'log_slow_rate_limit = 1000' }
+    - { regexp: '^#log_slow_verbosity', line: 'log_slow_verbosity = query_plan' }
+  notify: restart mysql
diff --git a/tasks/packages.yml b/tasks/packages.yml
new file mode 100644
index 0000000..c91041e
--- /dev/null
+++ b/tasks/packages.yml
@@ -0,0 +1,13 @@
+---
+- name: "Packages: Fakten sammeln"
+  package_facts:
+    manager: apt
+
+- name: "Packages: MariaDB-Server installieren"
+  apt:
+    pkg:
+      - default-mysql-server
+      - libcache-cache-perl
+      - python-pymysql
+    update_cache: yes
+    cache_valid_time: 3600
diff --git a/templates/munin-mariadb.j2 b/templates/munin-mariadb.j2
new file mode 100644
index 0000000..2cc5df7
--- /dev/null
+++ b/templates/munin-mariadb.j2
@@ -0,0 +1,4 @@
+[mysql*]
+env.mysqluser {{ munin_sql_user }}
+env.mysqlpassword {{ munin_sql_password }}
+env.mysqlconnection DBI:mysql:information_schema
\ No newline at end of file