From a434363727b6a8054050024ede09f7bc682730b6 Mon Sep 17 00:00:00 2001
From: Zachary Seguin <ztseguin@csclub.uwaterloo.ca>
Date: Wed, 30 Nov 2016 16:25:33 -0500
Subject: [PATCH] Configure MySQL on webnodes; forwarding
 /var/run/mysqld/mysqld.sock to caffeine:3306

---
 roles/webnode/files/mysql-forwarding.conf    |  1 +
 roles/webnode/files/mysql-forwarding.service |  9 +++++
 roles/webnode/tasks/main.yml                 | 35 ++++++++++++++++++++
 3 files changed, 45 insertions(+)
 create mode 100644 roles/webnode/files/mysql-forwarding.conf
 create mode 100644 roles/webnode/files/mysql-forwarding.service

diff --git a/roles/webnode/files/mysql-forwarding.conf b/roles/webnode/files/mysql-forwarding.conf
new file mode 100644
index 0000000..8d9a506
--- /dev/null
+++ b/roles/webnode/files/mysql-forwarding.conf
@@ -0,0 +1 @@
+d /var/run/mysqld 0755 root root -
diff --git a/roles/webnode/files/mysql-forwarding.service b/roles/webnode/files/mysql-forwarding.service
new file mode 100644
index 0000000..97e5c39
--- /dev/null
+++ b/roles/webnode/files/mysql-forwarding.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=MySQL forwarding to caffeine
+After=networking.target
+
+[Service]
+ExecStart=/usr/bin/socat UNIX-LISTEN:/var/run/mysqld/mysqld.sock,fork,reuseaddr,unlink-early,user=nobody,group=nogroup,mode=777 TCP:caffeine:3306
+
+[Install]
+WantedBy=multi-user.target
diff --git a/roles/webnode/tasks/main.yml b/roles/webnode/tasks/main.yml
index d1cc41f..f2e30a8 100644
--- a/roles/webnode/tasks/main.yml
+++ b/roles/webnode/tasks/main.yml
@@ -3,7 +3,12 @@
 - name: Install packages
   package: name={{ item }} state=latest
   with_items:
+     # PHP5
      - php5-fpm
+     - php5-mysql
+
+     # MySQL
+     - socat
 
 #
 # Apache setup
@@ -21,6 +26,7 @@
   service:
      name: apache2
      state: restarted
+     enabled: yes
   when: apache_configuration.changed
 
 #
@@ -37,4 +43,33 @@
   service:
      name: php5-fpm
      state: restarted
+     enabled: yes
   when: fpm_configuration.changed
+
+#
+# MySQL setup
+#
+- name: Configure MySQL forwarding service
+  copy:
+     src: mysql-forwarding.service
+     dest: /etc/systemd/system/mysql-forwarding.service
+     backup: no
+  register: mysql_forwarding
+
+- name: Configure MySQL tmp file
+  copy:
+     src: mysql-forwarding.conf
+     dest: /etc/tmpfiles.d/mysql-forwarding.conf
+     backup: no
+  register: mysql_forwarding_tmpfile
+
+- name: Create tmpfiles for MySQL forwarding
+  command: systemd-tmpfiles --create
+  when: mysql_forwarding_tmpfile.changed
+
+- name: Enable MySQL forwarding service
+  service:
+     name: mysql-forwarding
+     state: restarted
+     enabled: yes
+  when: mysql_forwarding.changed or mysql_forwarding_tmpfile.changed