Add mysql-proxy to enable read-only access to a db

This commit adds a mysql_proxy module which will setup a read-only
proxy to a mysql db. This also configures a proxy to the subunit2sql
db to run on logstash.o.o to provide read only access to the data in
the database.

Change-Id: I478baca354354347fe50074a8e3b9f66ca890d55

files/mysql-proxy

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+ENABLED="true"
+OPTIONS="--defaults-file /etc/mysql-proxy/mysql-proxy.conf"

manifests/init.pp

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+# Copyright 2014 Hewlett-Packard Development Company, L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# == Class: mysql_proxy
+#
+class mysql_proxy {
+
+    package { 'mysql-proxy':
+      ensure => present,
+    }
+
+    file { '/etc/mysql-proxy':
+      ensure   => directory,
+      owner    => 'root',
+      group    => 'root',
+      mode     => '0644',
+      require  => Package['mysql-proxy'],
+
+    }
+
+    file { '/etc/default/mysql-proxy':
+      owner    => 'root',
+      group    => 'root',
+      mode     => '0644',
+      source   => 'puppet:///modules/mysql_proxy/mysql-proxy',
+      require  => Package['mysql-proxy'],
+    }
+
+}

manifests/server.pp

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+# Copyright 2014 Hewlett-Packard Development Company, L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+# == Class: mysql_proxy::server
+#
+class mysql_proxy::server (
+  $db_host,
+  $db_port='3306',
+  $lua_script = '/usr/share/mysql-proxy/rw-splitting.lua',
+  $admin_username = 'admin',
+  $admin_pass,
+) {
+
+  file { '/etc/mysql-proxy/mysql-proxy.conf':
+    ensure   => file,
+    owner    => 'root',
+    group    => 'root',
+    mode     => '0600',
+    content  => template("mysql_proxy/mysql-proxy.conf.erb"),
+    require  => File['/etc/mysql-proxy']
+  }
+
+  service{ 'mysql-proxy':
+    ensure => running,
+    subscribe => [
+      Package['mysql-proxy'],
+      File['/etc/mysql-proxy/mysql-proxy.conf'],
+    ],
+  }
+}

templates/mysql-proxy.conf.erb

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+[mysql-proxy]
+log-file = /var/log/mysql-proxy.log
+log-level = message
+proxy-read-only-backend-addresses = <%= @db_host %>:<%= @db_port %>
+proxy-lua-script = <%= @lua_script %>
+admin-username = <%= @admin_username %>
+admin-password = <%= @admin_pass %>
+admin-lua-script = /usr/share/mysql-proxy/admin.lua