Class: Snapback::App::Create

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/snapback/app/create.rb

Instance Method Summary collapse

Instance Method Details

#go ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
 
# File 'lib/snapback/app/create.rb', line 8

def go
  # Ensure we have a size parameter
  if $options[:size].nil? then
    raise "You must specify a size attribute. E.g.: -s 500M"
  end

  volume_group_name = "#{$config['lvm']['volume_group']}"
  logical_volume_name = "#{$config['lvm']['prefix_database']}-#{$options[:database]}"
  mount_dir = get_mount_dir $options[:database]
  mysql_data_dir = $database.get_data_dir

  if !check "Checking database exists #{$options[:database]}", lambda {
    $database.db_exists?($options[:database])
  } then
    check "Creating database '#{$options[:database]}'", lambda {
      $database.db_create($options[:database])
    }
    
    on_rollback lambda {
      check "Database '#{$options[:database]}' is being dropped", lambda {
        $database.db_drop($options[:database])
      }
    }
  end

  exec_flush

  # Stop the MySQL Server
  $database.server_stop

  on_rollback lambda {
    $database.server_start
  }

  # Create a new logical volume (500MB)
  # lvcreate –L 500MB –n mysql-{dbName} {vgName};
  run "Create logical volume", 
    "lvcreate -L #{$options[:size]} -n #{logical_volume_name} #{volume_group_name}"

  on_rollback lambda {
    run "Removing logical volume",
      "lvremove -f /dev/#{volume_group_name}/#{logical_volume_name}"
  }

  # Format the logical volume in ext4 format
  # mkfs.ext4 /dev/{vgName}/mysql-{dbName};
  run "Format logical volume filesystem",
    "mkfs.ext4 /dev/#{volume_group_name}/#{logical_volume_name}"

  # Create a new directory for where the MySQL database can be mounted
  # mkdir /mnt/mysql/{dbName};

  if !File.directory? mount_dir then
    run "Make mount directory", 
      "mkdir #{mount_dir}"

    on_rollback lambda {
      run "Removing mount directory",
        "rmdir #{$mount_dir}"
    }

    run "Changing permissions of mount directory",
      "chmod 0777 #{mount_dir}"
  end
  
  # # Mount the new logical volume
  # mount /dev/{vgName}/mysql-{dbName} /mnt/mysql/{dbName};
  exec_mount "/dev/#{volume_group_name}/#{logical_volume_name}", mount_dir

  # # Move the contents of the database to the new logical volume
  # mv {mysql-data-dir}/{dbName}/* /mnt/mysql/{dbName};

  move_mysql_files "#{mysql_data_dir}/#{$options[:database]}", mount_dir

  on_rollback lambda {
    move_mysql_files mount_dir, "#{mysql_data_dir}/#{$options[:database]}"
  }

  # # Remove the folder in the MySQL data directory
  # rmdir {mysql-data-dir}/{dbName}/
  run "Remove mysql database directory",
    "rm -rf #{mysql_data_dir}/#{$options[:database]}"

  on_rollback lambda {
    run "Re-creating MySQL database directory",
      "mkdir #{mysql_data_dir}/#{$options[:database]}"

    exec_chown "#{mysql_data_dir}/#{$options[:database]}"
  }

  # # Symbolic-link the MySQL data directory to the new logical volume
  # ln -s /mnt/mysql/{dbName} {mysql-data-dir}/{dbName}/
  exec_link "#{mysql_data_dir}/#{$options[:database]}", mount_dir

  # # Change the permissions & ownership to MySQL 
  # chown -R mysql:mysql {mysql-data-dir}/{dbName}/
  # chown -R mysql:mysql /mnt/mysql/{dbName}/
  exec_chown "#{mysql_data_dir}/#{$options[:database]}"
  exec_chown mount_dir

  # Stop the MySQL Server
  $database.server_start

  on_rollback lambda {
    $database.server_stop
  }
end