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@letsspeak letsspeak/mysql.rake
Last active Dec 31, 2015

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Ruby on Rails mysql backup rake task
# encoding: utf-8
namespace :mysql do
desc 'backup mysql database'
task :backup => :environment do
filename = "#{Rails.root}/config/database.yml"
config = YAML::load(File.open(filename))[Rails.env]
if config.nil?
p "database config file (#{filename}) has no environment setting for #{Rails.env}"
return
end
if config["adapter"] != "mysql2"
p "database setting for #{Rails.env} is not mysql2"
return
end
database = config["database"]
host = config["host"] || "localhost"
username = config["username"]
password = config["password"]
outdir = config["backupdir"] || "#{Rails.root}/tmp"
outfile = "#{outdir}/#{Rails.env}_#{DateTime.now.strftime("%Y%m%d_%H%M%S.sql")}"
if username.nil?
p "database setting for #{Rails.env} has no username"
return
end
if password.nil?
p "database setting for #{Rails.env} has no password"
return
end
begin
Dir::mkdir(outdir) unless File.exists?(outdir)
rescue
p "makedir #{outdir} failed"
return
end
"created: #{outdir}"
command = "mysqldump --default-character-set=binary #{database} --host=#{host} --user=#{username} --password=#{password} > #{outfile}"
begin
exec command
rescue
p "execute command failed: #{command}"
end
end
end
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