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# frozen_string_literal: true
require 'yaml'
module Backup
class Database < Task
extend ::Gitlab::Utils::Override
include Backup::Helper
attr_reader :force, :config
IGNORED_ERRORS = [
# Ignore warnings
/WARNING:/,
# Ignore the DROP errors; recent database dumps will use --if-exists with pg_dump
/does not exist$/,
# User may not have permissions to drop extensions or schemas
/must be owner of/
].freeze
IGNORED_ERRORS_REGEXP = Regexp.union(IGNORED_ERRORS).freeze
def initialize(database_name, progress, force:)
super(progress)
@database_name = database_name
@config = base_model.connection_db_config.configuration_hash
@force = force
end
override :dump
def dump(db_file_name, backup_id)
FileUtils.mkdir_p(File.dirname(db_file_name))
FileUtils.rm_f(db_file_name)
compress_rd, compress_wr = IO.pipe
compress_pid = spawn(gzip_cmd, in: compress_rd, out: [db_file_name, 'w', 0600])
compress_rd.close
dump_pid =
case config[:adapter]
when "postgresql" then
progress.print "Dumping PostgreSQL database #{database} ... "
pg_env
pgsql_args = ["--clean"] # Pass '--clean' to include 'DROP TABLE' statements in the DB dump.
pgsql_args << '--if-exists'
if Gitlab.config.backup.pg_schema
pgsql_args << '-n'
pgsql_args << Gitlab.config.backup.pg_schema
Gitlab::Database::EXTRA_SCHEMAS.each do |schema|
pgsql_args << '-n'
pgsql_args << schema.to_s
end
end
Process.spawn('pg_dump', *pgsql_args, database, out: compress_wr)
end
compress_wr.close
success = [compress_pid, dump_pid].all? do |pid|
Process.waitpid(pid)
$?.success?
end
report_success(success)
progress.flush
raise DatabaseBackupError.new(config, db_file_name) unless success
end
override :restore
def restore(db_file_name)
unless File.exist?(db_file_name)
raise(Backup::Error, "Source database file does not exist #{db_file_name}") if main_database?
progress.puts "Source backup for the database #{@database_name} doesn't exist. Skipping the task"
return
end
unless force
progress.puts 'Removing all tables. Press `Ctrl-C` within 5 seconds to abort'.color(:yellow)
sleep(5)
end
# Drop all tables Load the schema to ensure we don't have any newer tables
# hanging out from a failed upgrade
puts_time 'Cleaning the database ... '.color(:blue)
Rake::Task['gitlab:db:drop_tables'].invoke
puts_time 'done'.color(:green)
decompress_rd, decompress_wr = IO.pipe
decompress_pid = spawn(*%w(gzip -cd), out: decompress_wr, in: db_file_name)
decompress_wr.close
status, @errors =
case config[:adapter]
when "postgresql" then
progress.print "Restoring PostgreSQL database #{database} ... "
pg_env
execute_and_track_errors(pg_restore_cmd, decompress_rd)
end
decompress_rd.close
Process.waitpid(decompress_pid)
success = $?.success? && status.success?
if @errors.present?
progress.print "------ BEGIN ERRORS -----\n".color(:yellow)
progress.print @errors.join.color(:yellow)
progress.print "------ END ERRORS -------\n".color(:yellow)
end
report_success(success)
raise Backup::Error, 'Restore failed' unless success
end
override :pre_restore_warning
def pre_restore_warning
return if force
<<-MSG.strip_heredoc
Be sure to stop Puma, Sidekiq, and any other process that
connects to the database before proceeding. For Omnibus
installs, see the following link for more information:
https://docs.gitlab.com/ee/raketasks/backup_restore.html#restore-for-omnibus-gitlab-installations
Before restoring the database, we will remove all existing
tables to avoid future upgrade problems. Be aware that if you have
custom tables in the GitLab database these tables and all data will be
removed.
MSG
end
override :post_restore_warning
def post_restore_warning
return unless @errors.present?
<<-MSG.strip_heredoc
There were errors in restoring the schema. This may cause
issues if this results in missing indexes, constraints, or
columns. Please record the errors above and contact GitLab
Support if you have questions:
https://about.gitlab.com/support/
MSG
end
protected
def database
@config[:database]
end
def base_model
Gitlab::Database.database_base_models[@database_name]
end
def main_database?
@database_name == :main
end
def ignore_error?(line)
IGNORED_ERRORS_REGEXP.match?(line)
end
def execute_and_track_errors(cmd, decompress_rd)
errors = []
Open3.popen3(ENV, *cmd) do |stdin, stdout, stderr, thread|
stdin.binmode
out_reader = Thread.new do
data = stdout.read
$stdout.write(data)
end
err_reader = Thread.new do
until (raw_line = stderr.gets).nil?
warn(raw_line)
errors << raw_line unless ignore_error?(raw_line)
end
end
begin
IO.copy_stream(decompress_rd, stdin)
rescue Errno::EPIPE
end
stdin.close
[thread, out_reader, err_reader].each(&:join)
[thread.value, errors]
end
end
def pg_env
args = {
username: 'PGUSER',
host: 'PGHOST',
port: 'PGPORT',
password: 'PGPASSWORD',
# SSL
sslmode: 'PGSSLMODE',
sslkey: 'PGSSLKEY',
sslcert: 'PGSSLCERT',
sslrootcert: 'PGSSLROOTCERT',
sslcrl: 'PGSSLCRL',
sslcompression: 'PGSSLCOMPRESSION'
}
args.each do |opt, arg|
# This enables the use of different PostgreSQL settings in
# case PgBouncer is used. PgBouncer clears the search path,
# which wreaks havoc on Rails if connections are reused.
override = "GITLAB_BACKUP_#{arg}"
val = ENV[override].presence || config[opt].to_s.presence
ENV[arg] = val if val
end
end
def report_success(success)
if success
progress.puts '[DONE]'.color(:green)
else
progress.puts '[FAILED]'.color(:red)
end
end
private
def pg_restore_cmd
['psql', database]
end
end
end
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