是否有用于备份数据库中数据的 rake 任务?
-
09-06-2019 - |
题
是否有用于备份数据库中数据的 rake 任务?
我已经备份了架构,但我想备份数据。这是一个小型 MySQL 数据库。
解决方案
下面的脚本是一个简化版本,取自 眼帽, ,具体来自 这个文件.
set :dbuser "user"
set :dbhost "host"
set :database "db"
namespace :db do
desc "Get the database password from user"
task :get_password do
set(:dbpass) do
Capistrano::CLI.ui.ask "Enter mysql password: "
end
end
task :backup_name, :only => { :primary => true } do
now = Time.now
run "mkdir -p #{shared_path}/db_backups"
backup_time = [now.year,now.month,now.day,now.hour,now.min,now.sec].join('-')
set :backup_file, "#{shared_path}/db_backups/#{database}-snapshot-#{backup_time}.sql"
end
desc "Dump database to backup file"
task :dump, :roles => :db, :only => {:primary => true} do
backup_name
run "mysqldump --add-drop-table -u #{dbuser} -h #{dbhost} -p#{dbpass} #{database} | bzip2 -c > #{backup_file}.bz2"
end
end
编辑:是的,我想我错过了这一点,即您正在寻找 rake 任务而不是 capistrano 任务,但抱歉,我手头没有 rake 任务。
其他提示
我没有用于备份 MySQL 数据库的 rake 任务,但我确实用 Ruby 编写了一个脚本来为我的 WordPress 数据库执行此操作:
filename = 'wp-config.php'
def get_db_info(file)
username = nil
password = nil
db_name = nil
file.each { |line|
if line =~ /'DB_(USER|PASSWORD|NAME)', '([[:alnum:]]*)'/
if $1 == "USER"
username = $2
elsif $1 == "PASSWORD"
password = $2
elsif $1 == "NAME"
db_name = $2
end
end
}
if username.nil? || password.nil? || db_name.nil?
puts "[backup_db][bad] couldn't get all needed info"
exit
end
return username, password, db_name
end
begin
config_file = open("#{filename}")
rescue Errno::ENOENT
puts "[backup_db][bad] File '#{filename}' didn't exist"
exit
else
puts "[backup_db][good] File '#{filename}' existed"
end
username, password, db_name = get_db_info(config_file)
sql_dump_info = `mysqldump --user=#{username} --password=#{password} #{dbname}`
puts sql_dump_info
您应该能够接受这个并对其进行一些温和的修剪,以放入您的用户名/密码/数据库名,以使其启动并为您工作。我也将其放入 crontab 中以每天运行,将其转换为 rake 任务运行应该不会有太多工作,因为它已经是 Ruby 代码(也可能是一个很好的学习练习)。
告诉我们进展如何!
有一个名为“mysqltasks”的插件,只需谷歌即可找到。它只是一个 rakefile——我发现它非常容易使用。
为了防止人们仍在寻找解决方案,我们目前使用 ar_fixtures 插件来备份我们的数据库,无论如何,这也是解决方案的一部分。
它提供了耙子 db:fixtures:dump
任务。这会将 YAML 中的所有内容吐出到测试/固定装置中,因此可以使用它再次加载 db:fixtures:load
.
我们在每个功能投入生产之前使用它进行备份。我们在从 sqlite3 迁移到 Postgres 时也使用了它——这非常有用,因为 SQL 方言之间的不兼容性在很大程度上是隐藏的。
祝一切顺利,D
如果数据库中有任何存储过程,请确保将“--routines”参数添加到 mysqldump,以便它也备份它们。
我的 rake 任务是备份 mysql,并循环轮换备份。
#encoding: utf-8
#require 'fileutils'
namespace :mls do
desc 'Create of realty_dev database backup'
task :backup => :environment do
backup_max_records = 4
datestamp = Time.now.strftime("%Y-%m-%d_%H-%M")
backup_dir = File.join(Rails.root, ENV['DIR'] || 'backups', 'db')
backup_file_name = "#{datestamp}_#{Rails.env}_dump.sql"
backup_file_path = File.join(backup_dir, "#{backup_file_name}")
FileUtils.mkdir_p(backup_dir)
#database processing
db_config = ActiveRecord::Base.configurations[Rails.env]
system "mysqldump -u#{db_config['username']} -p#{db_config['password']} -i -c -q #{db_config['database']} > #{backup_file_path}"
raise 'Unable to make DB backup!' if ($?.to_i > 0)
# sql dump file compression
system "gzip -9 #{backup_file_path}"
# backup rotation
dir = Dir.new(backup_dir)
backup_all_records = dir.entries.sort[2..-1].reverse
puts "Created backup: #{backup_file_name}.gz"
#redundant records
backup_del_records = backup_all_records[backup_max_records..-1] || []
# backup deleting too old records
for backup_del_record in backup_del_records
FileUtils.rm_rf(File.join(backup_dir, backup_del_record))
end
puts "Deleted #{backup_del_records.length} old backups, #{backup_all_records.length - backup_del_records.length} backups available"
puts "Backup passed"
end
end
=begin
run by this command: " rake db:backup RAILS_ENV="development" "
=end