/usr/lib/one/ruby/onedb/onedb_backend.rb is in opennebula 3.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright 2002-2011, OpenNebula Project Leads (OpenNebula.org) #
# #
# 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. #
#--------------------------------------------------------------------------- #
require 'rubygems'
require 'sequel'
class OneDBBacKEnd
def read_db_version
connect_db
version = "2.0"
timestamp = 0
comment = ""
@db.fetch("SELECT version, timestamp, comment FROM db_versioning " +
"WHERE oid=(SELECT MAX(oid) FROM db_versioning)") do |row|
version = row[:version]
timestamp = row[:timestamp]
comment = row[:comment]
end
return [version, timestamp, comment]
rescue Exception => e
if e.class == Sequel::DatabaseConnectionError
raise e
elsif !db_exists?
# If the DB doesn't have db_version table, it means it is empty or a 2.x
raise "Database schema does not look to be created by " <<
"OpenNebula: table user_pool is missing or empty."
end
begin
# Table image_pool is present only in 2.X DBs
@db.fetch("SELECT * FROM image_pool") { |row| }
rescue
raise "Database schema looks to be created by OpenNebula 1.X." <<
"This tool only works with databases created by 2.X versions."
end
comment = "Could not read any previous db_versioning data, " <<
"assuming it is an OpenNebula 2.0 or 2.2 DB."
return [version, timestamp, comment]
end
def history
connect_db
begin
query = "SELECT version, timestamp, comment FROM db_versioning"
@db.fetch(query) do |row|
puts "Version: #{row[:version]}"
time = Time.at(row[:timestamp])
puts "Timestamp: #{time.strftime("%m/%d %H:%M:%S")}"
puts "Comment: #{row[:comment]}"
puts ""
end
rescue Exception => e
raise "No version records found. Error message: " + e.message
end
end
def update_db_version(version)
comment = "Database migrated from #{version} to #{db_version}"+
" (#{one_version}) by onedb command."
max_oid = nil
@db.fetch("SELECT MAX(oid) FROM db_versioning") do |row|
max_oid = row[:"MAX(oid)"].to_i
end
max_oid = 0 if max_oid.nil?
query =
@db.run(
"INSERT INTO db_versioning (oid, version, timestamp, comment) "<<
"VALUES (" <<
"#{max_oid+1}, " <<
"'#{db_version}', " <<
"#{Time.new.to_i}, " <<
"'#{comment}')"
)
puts comment
end
private
def db_exists?
begin
found = false
# User with ID 0 (oneadmin) always exists
@db.fetch("SELECT * FROM user_pool WHERE oid=0") { |row|
found = true
}
rescue
end
return found
end
end
class BackEndMySQL < OneDBBacKEnd
def initialize(opts={})
@server = opts[:server]
@port = opts[:port]
@user = opts[:user]
@passwd = opts[:passwd]
@db_name = opts[:db_name]
# Check for errors:
error = false
(error = true; missing = "USER" ) if @user == nil
(error = true; missing = "DBNAME") if @db_name == nil
if error
raise "MySQL option #{missing} is needed"
end
# Check for defaults:
@server = "localhost" if @server.nil?
@port = 0 if @port.nil?
# Clean leading and trailing quotes, if any
@server = @server [1..-2] if @server [0] == ?"
@port = @port [1..-2] if @port [0] == ?"
@user = @user [1..-2] if @user [0] == ?"
@passwd = @passwd [1..-2] if @passwd [0] == ?"
@db_name = @db_name[1..-2] if @db_name[0] == ?"
end
def bck_file
"#{VAR_LOCATION}/mysql_#{@server}_#{@db_name}.sql"
end
def backup(bck_file)
cmd = "mysqldump -u #{@user} -p#{@passwd} -h #{@server} " +
"-P #{@port} #{@db_name} > #{bck_file}"
rc = system(cmd)
if !rc
raise "Unknown error running '#{cmd}'"
end
puts "MySQL dump stored in #{bck_file}"
puts "Use 'onedb restore' or restore the DB using the mysql command:"
puts "mysql -u user -h server -P port db_name < backup_file"
end
def restore(bck_file, force=nil)
connect_db
if !force && db_exists?
raise "MySQL database #{@db_name} at #{@server} exists," <<
" use -f to overwrite."
end
mysql_cmd = "mysql -u #{@user} -p#{@passwd} -h #{@server} -P #{@port} "
drop_cmd = mysql_cmd + "-e 'DROP DATABASE IF EXISTS #{@db_name};'"
rc = system(drop_cmd)
if !rc
raise "Error dropping MySQL DB #{@db_name} at #{@server}."
end
create_cmd = mysql_cmd+"-e 'CREATE DATABASE IF NOT EXISTS #{@db_name};'"
rc = system(create_cmd)
if !rc
raise "Error creating MySQL DB #{@db_name} at #{@server}."
end
restore_cmd = mysql_cmd + "#{@db_name} < #{bck_file}"
rc = system(restore_cmd)
if !rc
raise "Error while restoring MySQL DB #{@db_name} at #{@server}."
end
puts "MySQL DB #{@db_name} at #{@server} restored."
end
private
def connect_db
endpoint = "mysql://#{@user}:#{@passwd}@#{@server}:#{@port}/#{@db_name}"
begin
@db = Sequel.connect(endpoint)
rescue Exception => e
raise "Error connecting to DB: " + e.message
end
end
end
class BackEndSQLite < OneDBBacKEnd
require 'fileutils'
def initialize(file)
@sqlite_file = file
if !File.exists?(@sqlite_file)
raise "File #{@sqlite_file} doesn't exist"
end
end
def bck_file
"#{VAR_LOCATION}/one.db.bck"
end
def backup(bck_file)
FileUtils.cp(@sqlite_file, "#{bck_file}")
puts "Sqlite database backup stored in #{bck_file}"
puts "Use 'onedb restore' or copy the file back to restore the DB."
end
def restore(bck_file, force=nil)
if !force
raise "File #{@sqlite_file} exists, use -f to overwrite."
end
FileUtils.cp(bck_file, @sqlite_file)
puts "Sqlite database backup restored in #{@sqlite_file}"
end
private
def connect_db
begin
@db = Sequel.sqlite(@sqlite_file)
rescue Exception => e
raise "Error connecting to DB: " + e.message
end
end
end
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