378 lines
15 KiB
Ruby
378 lines
15 KiB
Ruby
# frozen_string_literal: true
|
||
|
||
module Gitlab
|
||
module Database
|
||
DATABASE_NAMES = %w[main ci].freeze
|
||
|
||
MAIN_DATABASE_NAME = 'main'
|
||
CI_DATABASE_NAME = 'ci'
|
||
DEFAULT_POOL_HEADROOM = 10
|
||
|
||
# This constant is used when renaming tables concurrently.
|
||
# If you plan to rename a table using the `rename_table_safely` method, add your table here one milestone before the rename.
|
||
# Example:
|
||
# TABLES_TO_BE_RENAMED = {
|
||
# 'old_name' => 'new_name'
|
||
# }.freeze
|
||
TABLES_TO_BE_RENAMED = {}.freeze
|
||
|
||
# Minimum PostgreSQL version requirement per documentation:
|
||
# https://docs.gitlab.com/ee/install/requirements.html#postgresql-requirements
|
||
MINIMUM_POSTGRES_VERSION = 12
|
||
|
||
# https://www.postgresql.org/docs/9.2/static/datatype-numeric.html
|
||
MAX_INT_VALUE = 2147483647
|
||
MIN_INT_VALUE = -2147483648
|
||
|
||
# The max value between MySQL's TIMESTAMP and PostgreSQL's timestampz:
|
||
# https://www.postgresql.org/docs/9.1/static/datatype-datetime.html
|
||
# https://dev.mysql.com/doc/refman/5.7/en/datetime.html
|
||
# FIXME: this should just be the max value of timestampz
|
||
MAX_TIMESTAMP_VALUE = Time.at((1 << 31) - 1).freeze
|
||
|
||
# The maximum number of characters for text fields, to avoid DoS attacks via parsing huge text fields
|
||
# https://gitlab.com/gitlab-org/gitlab-foss/issues/61974
|
||
MAX_TEXT_SIZE_LIMIT = 1_000_000
|
||
|
||
# Minimum schema version from which migrations are supported
|
||
# Migrations before this version may have been removed
|
||
MIN_SCHEMA_VERSION = 20190506135400
|
||
MIN_SCHEMA_GITLAB_VERSION = '11.11.0'
|
||
|
||
# Schema we store dynamically managed partitions in (e.g. for time partitioning)
|
||
DYNAMIC_PARTITIONS_SCHEMA = :gitlab_partitions_dynamic
|
||
|
||
# Schema we store static partitions in (e.g. for hash partitioning)
|
||
STATIC_PARTITIONS_SCHEMA = :gitlab_partitions_static
|
||
|
||
# This is an extensive list of postgres schemas owned by GitLab
|
||
# It does not include the default public schema
|
||
EXTRA_SCHEMAS = [DYNAMIC_PARTITIONS_SCHEMA, STATIC_PARTITIONS_SCHEMA].freeze
|
||
|
||
PRIMARY_DATABASE_NAME = ActiveRecord::Base.connection_db_config.name.to_sym # rubocop:disable Database/MultipleDatabases
|
||
|
||
def self.database_base_models
|
||
@database_base_models ||= {
|
||
# Note that we use ActiveRecord::Base here and not ApplicationRecord.
|
||
# This is deliberate, as we also use these classes to apply load
|
||
# balancing to, and the load balancer must be enabled for _all_ models
|
||
# that inher from ActiveRecord::Base; not just our own models that
|
||
# inherit from ApplicationRecord.
|
||
main: ::ActiveRecord::Base,
|
||
ci: ::Ci::ApplicationRecord.connection_class? ? ::Ci::ApplicationRecord : nil
|
||
}.compact.with_indifferent_access.freeze
|
||
end
|
||
|
||
# This returns a list of databases that contains all the gitlab_shared schema
|
||
# tables. We can't reuse database_base_models because Geo does not support
|
||
# the gitlab_shared tables yet.
|
||
def self.database_base_models_with_gitlab_shared
|
||
@database_base_models_with_gitlab_shared ||= {
|
||
# Note that we use ActiveRecord::Base here and not ApplicationRecord.
|
||
# This is deliberate, as we also use these classes to apply load
|
||
# balancing to, and the load balancer must be enabled for _all_ models
|
||
# that inher from ActiveRecord::Base; not just our own models that
|
||
# inherit from ApplicationRecord.
|
||
main: ::ActiveRecord::Base,
|
||
ci: ::Ci::ApplicationRecord.connection_class? ? ::Ci::ApplicationRecord : nil
|
||
}.compact.with_indifferent_access.freeze
|
||
end
|
||
|
||
# This returns a list of databases whose connection supports database load
|
||
# balancing. We can't reuse the database_base_models method because the Geo
|
||
# database does not support load balancing yet.
|
||
#
|
||
# TODO: https://gitlab.com/gitlab-org/geo-team/discussions/-/issues/5032
|
||
def self.database_base_models_using_load_balancing
|
||
@database_base_models_with_gitlab_shared ||= {
|
||
# Note that we use ActiveRecord::Base here and not ApplicationRecord.
|
||
# This is deliberate, as we also use these classes to apply load
|
||
# balancing to, and the load balancer must be enabled for _all_ models
|
||
# that inher from ActiveRecord::Base; not just our own models that
|
||
# inherit from ApplicationRecord.
|
||
main: ::ActiveRecord::Base,
|
||
ci: ::Ci::ApplicationRecord.connection_class? ? ::Ci::ApplicationRecord : nil
|
||
}.compact.with_indifferent_access.freeze
|
||
end
|
||
|
||
# This returns a list of base models with connection associated for a given gitlab_schema
|
||
def self.schemas_to_base_models
|
||
@schemas_to_base_models ||= {
|
||
gitlab_main: [self.database_base_models.fetch(:main)],
|
||
gitlab_ci: [self.database_base_models[:ci] || self.database_base_models.fetch(:main)], # use CI or fallback to main
|
||
gitlab_shared: database_base_models_with_gitlab_shared.values, # all models
|
||
gitlab_internal: database_base_models.values # all models
|
||
}.with_indifferent_access.freeze
|
||
end
|
||
|
||
def self.all_database_names
|
||
DATABASE_NAMES
|
||
end
|
||
|
||
# We configure the database connection pool size automatically based on the
|
||
# configured concurrency. We also add some headroom, to make sure we don't
|
||
# run out of connections when more threads besides the 'user-facing' ones
|
||
# are running.
|
||
#
|
||
# Read more about this in
|
||
# doc/development/database/client_side_connection_pool.md
|
||
def self.default_pool_size
|
||
headroom =
|
||
(ENV["DB_POOL_HEADROOM"].presence || DEFAULT_POOL_HEADROOM).to_i
|
||
|
||
Gitlab::Runtime.max_threads + headroom
|
||
end
|
||
|
||
def self.has_config?(database_name)
|
||
Gitlab::Application.config.database_configuration[Rails.env].include?(database_name.to_s)
|
||
end
|
||
|
||
class PgUser < ApplicationRecord
|
||
self.table_name = 'pg_user'
|
||
self.primary_key = :usename
|
||
end
|
||
|
||
# rubocop: disable CodeReuse/ActiveRecord
|
||
def self.check_for_non_superuser
|
||
user = PgUser.find_by('usename = CURRENT_USER')
|
||
am_i_superuser = user.usesuper
|
||
|
||
Gitlab::AppLogger.info(
|
||
"Account details: User: \"#{user.usename}\", UseSuper: (#{am_i_superuser})"
|
||
)
|
||
|
||
raise 'Error: detected superuser' if am_i_superuser
|
||
rescue ActiveRecord::StatementInvalid
|
||
raise 'User CURRENT_USER not found'
|
||
end
|
||
# rubocop: enable CodeReuse/ActiveRecord
|
||
|
||
def self.check_postgres_version_and_print_warning
|
||
return if Gitlab::Runtime.rails_runner?
|
||
|
||
database_base_models.each do |name, model|
|
||
database = Gitlab::Database::Reflection.new(model)
|
||
|
||
next if database.postgresql_minimum_supported_version?
|
||
|
||
Kernel.warn ERB.new(Rainbow.new.wrap(<<~EOS).red).result
|
||
|
||
██ ██ █████ ██████ ███ ██ ██ ███ ██ ██████
|
||
██ ██ ██ ██ ██ ██ ████ ██ ██ ████ ██ ██
|
||
██ █ ██ ███████ ██████ ██ ██ ██ ██ ██ ██ ██ ██ ███
|
||
██ ███ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
|
||
███ ███ ██ ██ ██ ██ ██ ████ ██ ██ ████ ██████
|
||
|
||
******************************************************************************
|
||
You are using PostgreSQL #{database.version} for the #{name} database, but PostgreSQL >= <%= Gitlab::Database::MINIMUM_POSTGRES_VERSION %>
|
||
is required for this version of GitLab.
|
||
<% if Rails.env.development? || Rails.env.test? %>
|
||
If using gitlab-development-kit, please find the relevant steps here:
|
||
https://gitlab.com/gitlab-org/gitlab-development-kit/-/blob/main/doc/howto/postgresql.md#upgrade-postgresql
|
||
<% end %>
|
||
Please upgrade your environment to a supported PostgreSQL version, see
|
||
https://docs.gitlab.com/ee/install/requirements.html#database for details.
|
||
******************************************************************************
|
||
EOS
|
||
rescue ActiveRecord::ActiveRecordError, PG::Error
|
||
# ignore - happens when Rake tasks yet have to create a database, e.g. for testing
|
||
end
|
||
end
|
||
|
||
def self.random
|
||
"RANDOM()"
|
||
end
|
||
|
||
def self.true_value
|
||
"'t'"
|
||
end
|
||
|
||
def self.false_value
|
||
"'f'"
|
||
end
|
||
|
||
def self.sanitize_timestamp(timestamp)
|
||
MAX_TIMESTAMP_VALUE > timestamp ? timestamp : MAX_TIMESTAMP_VALUE.dup
|
||
end
|
||
|
||
def self.all_uncached(&block)
|
||
# Calls to #uncached only disable caching for the current connection. Since the load balancer
|
||
# can potentially upgrade from read to read-write mode (using a different connection), we specify
|
||
# up-front that we'll explicitly use the primary for the duration of the operation.
|
||
Gitlab::Database::LoadBalancing::Session.current.use_primary do
|
||
base_models = database_base_models_using_load_balancing.values
|
||
base_models.reduce(block) { |blk, model| -> { model.uncached(&blk) } }.call
|
||
end
|
||
end
|
||
|
||
def self.allow_cross_joins_across_databases(url:)
|
||
# this method is implemented in:
|
||
# spec/support/database/prevent_cross_joins.rb
|
||
yield
|
||
end
|
||
|
||
def self.add_post_migrate_path_to_rails(force: false)
|
||
return if ENV['SKIP_POST_DEPLOYMENT_MIGRATIONS'] && !force
|
||
|
||
Rails.application.config.paths['db'].each do |db_path|
|
||
path = Rails.root.join(db_path, 'post_migrate').to_s
|
||
|
||
unless Rails.application.config.paths['db/migrate'].include? path
|
||
Rails.application.config.paths['db/migrate'] << path
|
||
|
||
# Rails memoizes migrations at certain points where it won't read the above
|
||
# path just yet. As such we must also update the following list of paths.
|
||
ActiveRecord::Migrator.migrations_paths << path
|
||
end
|
||
end
|
||
end
|
||
|
||
def self.db_config_names
|
||
::ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).map(&:name) - ['geo']
|
||
end
|
||
|
||
# This returns all matching schemas that a given connection can use
|
||
# Since the `ActiveRecord::Base` might change the connection (from main to ci)
|
||
# This does not look at literal connection names, but rather compares
|
||
# models that are holders for a given db_config_name
|
||
def self.gitlab_schemas_for_connection(connection)
|
||
db_config = self.db_config_for_connection(connection)
|
||
|
||
# connection might not be yet adopted (returning NullPool, and no connection_klass)
|
||
# in such cases it is fine to ignore such connections
|
||
return unless db_config
|
||
|
||
db_config_name = db_config.name.delete_suffix(LoadBalancing::LoadBalancer::REPLICA_SUFFIX)
|
||
primary_model = self.database_base_models.fetch(db_config_name.to_sym)
|
||
|
||
self.schemas_to_base_models.select do |_, child_models|
|
||
child_models.any? do |child_model|
|
||
child_model == primary_model || \
|
||
# The model might indicate a child connection, ensure that this is enclosed in a `db_config`
|
||
self.database_base_models[self.db_config_share_with(child_model.connection_db_config)] == primary_model
|
||
end
|
||
end.keys.map!(&:to_sym)
|
||
end
|
||
|
||
def self.db_config_for_connection(connection)
|
||
return unless connection
|
||
|
||
# For a ConnectionProxy we want to avoid ambiguous db_config as it may
|
||
# sometimes default to replica so we always return the primary config
|
||
# instead.
|
||
if connection.is_a?(::Gitlab::Database::LoadBalancing::ConnectionProxy)
|
||
return connection.load_balancer.configuration.db_config
|
||
end
|
||
|
||
# During application init we might receive `NullPool`
|
||
return unless connection.respond_to?(:pool) &&
|
||
connection.pool.respond_to?(:db_config)
|
||
|
||
connection.pool.db_config
|
||
end
|
||
|
||
# At the moment, the connection can only be retrieved by
|
||
# Gitlab::Database::LoadBalancer#read or #read_write or from the
|
||
# ActiveRecord directly. Therefore, if the load balancer doesn't
|
||
# recognize the connection, this method returns the primary role
|
||
# directly. In future, we may need to check for other sources.
|
||
# Expected returned names:
|
||
# main, main_replica, ci, ci_replica, unknown
|
||
def self.db_config_name(connection)
|
||
db_config = db_config_for_connection(connection)
|
||
db_config&.name || 'unknown'
|
||
end
|
||
|
||
# Currently the database configuration can only be shared with `main:`
|
||
# If the `database_tasks: false` is being used
|
||
# This is to be refined: https://gitlab.com/gitlab-org/gitlab/-/issues/356580
|
||
def self.db_config_share_with(db_config)
|
||
if db_config.database_tasks?
|
||
nil # no sharing
|
||
else
|
||
'main' # share with `main:`
|
||
end
|
||
end
|
||
|
||
def self.read_only?
|
||
false
|
||
end
|
||
|
||
def self.read_write?
|
||
!read_only?
|
||
end
|
||
|
||
# Monkeypatch rails with upgraded database observability
|
||
def self.install_transaction_metrics_patches!
|
||
ActiveRecord::Base.prepend(ActiveRecordBaseTransactionMetrics)
|
||
end
|
||
|
||
def self.install_transaction_context_patches!
|
||
ActiveRecord::ConnectionAdapters::TransactionManager
|
||
.prepend(TransactionManagerContext)
|
||
ActiveRecord::ConnectionAdapters::RealTransaction
|
||
.prepend(RealTransactionContext)
|
||
end
|
||
|
||
# MonkeyPatch for ActiveRecord::Base for adding observability
|
||
module ActiveRecordBaseTransactionMetrics
|
||
extend ActiveSupport::Concern
|
||
|
||
class_methods do
|
||
# A patch over ApplicationRecord.transaction that provides
|
||
# observability into transactional methods.
|
||
def transaction(**options, &block)
|
||
transaction_type = get_transaction_type(connection.transaction_open?, options[:requires_new])
|
||
|
||
::Gitlab::Database::Metrics.subtransactions_increment(self.name) if transaction_type == :sub_transaction
|
||
|
||
payload = { connection: connection, transaction_type: transaction_type }
|
||
|
||
ActiveSupport::Notifications.instrument('transaction.active_record', payload) do
|
||
super(**options, &block)
|
||
end
|
||
end
|
||
|
||
private
|
||
|
||
def get_transaction_type(transaction_open, requires_new_flag)
|
||
if transaction_open
|
||
return :sub_transaction if requires_new_flag
|
||
|
||
return :fake_transaction
|
||
end
|
||
|
||
:real_transaction
|
||
end
|
||
end
|
||
end
|
||
|
||
# rubocop:disable Gitlab/ModuleWithInstanceVariables
|
||
module TransactionManagerContext
|
||
def transaction_context
|
||
@stack.first.try(:gitlab_transaction_context)
|
||
end
|
||
end
|
||
|
||
module RealTransactionContext
|
||
def gitlab_transaction_context
|
||
@gitlab_transaction_context ||= ::Gitlab::Database::Transaction::Context.new
|
||
end
|
||
|
||
def commit
|
||
gitlab_transaction_context.commit
|
||
|
||
super
|
||
end
|
||
|
||
def rollback
|
||
gitlab_transaction_context.rollback
|
||
|
||
super
|
||
end
|
||
end
|
||
# rubocop:enable Gitlab/ModuleWithInstanceVariables
|
||
end
|
||
end
|
||
|
||
Gitlab::Database.prepend_mod_with('Gitlab::Database')
|