从备份恢复Discourse时遇到问题（3.4，数据库相当大）

支持
1

你好，
我们是你们的早期用户之一，自 2015 年起一直使用 Discourse。
在最近的更新（可能包含 PostgreSQL 更新，也许是 3.4 版本？）之前，一切运行正常。我们在该更新前只有一个备份点。我们决定进行全新安装，然后从该备份恢复。

操作系统：Ubuntu 24.04.1 LTS（最新更新）+ Docker 26.1.3
尝试将大型 Discourse 备份（44GB，单个站点）恢复到空白容器中。

自动化恢复在数据库迁移时失败，出现以下错误：
PG::DuplicateColumn: ERROR: column “notification_level” of relation “user_chat_channel_memberships” already exists (PG::DuplicateColumn)

日志：
具体来说，在部署 SQL 归档后，迁移停止，因为数据库中的某一列已存在。
column "notification_level" of relation "user_chat_channel_memberships" already exists

摘要

ALTER TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
正在迁移数据库…
异常：/var/www/discourse/lib/discourse.rb:139:in `exec’: 数据库迁移失败。
rake aborted!
StandardError: 发生错误，后续所有迁移已取消：(StandardError)

PG::DuplicateColumn: ERROR: column “notification_level” of relation “user_chat_channel_memberships” already exists
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/db/pg.rb:110:in exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/db/pg.rb:110:in async_exec’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:56:in block (2 levels) in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:1004:in block in with_raw_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-7.2.2.1/lib/active_support/concurrency/null_lock.rb:9:in synchronize' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:976:in with_raw_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:55:in block in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-7.2.2.1/lib/active_support/notifications/instrumenter.rb:58:in instrument’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:1119:in log' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:54:in raw_execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:538:in internal_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:137:in execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/query_cache.rb:27:in execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:48:in execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/schema_statements.rb:629:in add_column' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/schema_statements.rb:418:in add_column’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration/default_strategy.rb:10:in method_missing' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1059:in block in method_missing’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1025:in block in say_with_time' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1025:in say_with_time' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1048:in method_missing’
/var/www/discourse/plugins/chat/db/migrate/20241003122030_add_notification_level_to_user_chat_channel_memberships.rb:10:in up' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:997:in public_send’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:997:in exec_migration' /var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in block in exec_migration’

/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure' /var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in exec_migration’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:978:in block (2 levels) in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:977:in block in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:415:in with_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:976:in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1190:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1538:in block in execute_migration_in_transaction' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1591:in ddl_transaction’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1537:in execute_migration_in_transaction' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1512:in each’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1512:in migrate_without_lock' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1457:in block in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1609:in with_advisory_lock' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1457:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1264:in up' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1239:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/tasks/database_tasks.rb:262:in migrate' /var/www/discourse/lib/tasks/db.rake:259:in block (2 levels) in ’
/var/www/discourse/lib/distributed_mutex.rb:53:in block in synchronize' /var/www/discourse/lib/distributed_mutex.rb:49:in synchronize’
/var/www/discourse/lib/distributed_mutex.rb:49:in synchronize' /var/www/discourse/lib/distributed_mutex.rb:34:in synchronize’
/var/www/discourse/lib/tasks/db.rake:234:in block in <main>' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.2.1/exe/rake:27:in <top (required)>’

由以下错误引起：
ActiveRecord::StatementInvalid: PG::DuplicateColumn: ERROR: column “notification_level” of relation “user_chat_channel_memberships” already exists (ActiveRecord::StatementInvalid)
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/db/pg.rb:110:in exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/db/pg.rb:110:in async_exec’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:56:in block (2 levels) in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:1004:in block in with_raw_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-7.2.2.1/lib/active_support/concurrency/null_lock.rb:9:in synchronize' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:976:in with_raw_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:55:in block in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-7.2.2.1/lib/active_support/notifications/instrumenter.rb:58:in instrument’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:1119:in log' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:54:in raw_execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:538:in internal_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:137:in execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/query_cache.rb:27:in execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:48:in execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/schema_statements.rb:629:in add_column' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/schema_statements.rb:418:in add_column’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration/default_strategy.rb:10:in method_missing' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1059:in block in method_missing’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1025:in block in say_with_time' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1025:in say_with_time' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1048:in method_missing’
/var/www/discourse/plugins/chat/db/migrate/20241003122030_add_notification_level_to_user_chat_channel_memberships.rb:10:in up' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:997:in public_send’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:997:in exec_migration' /var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in block in exec_migration’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure' /var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in exec_migration’

/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:978:in block (2 levels) in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:977:in block in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:415:in with_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:976:in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1190:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1538:in block in execute_migration_in_transaction' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1591:in ddl_transaction’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1537:in execute_migration_in_transaction' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1512:in each’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1512:in migrate_without_lock' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1457:in block in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1609:in with_advisory_lock' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1457:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1264:in up' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1239:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/tasks/database_tasks.rb:262:in migrate' /var/www/discourse/lib/tasks/db.rake:259:in block (2 levels) in ’
/var/www/discourse/lib/distributed_mutex.rb:53:in block in synchronize' /var/www/discourse/lib/distributed_mutex.rb:49:in synchronize’
/var/www/discourse/lib/distributed_mutex.rb:49:in synchronize' /var/www/discourse/lib/distributed_mutex.rb:34:in synchronize’
/var/www/discourse/lib/tasks/db.rake:234:in block in <main>' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.2.1/exe/rake:27:in <top (required)>’

由以下错误引起：
PG::DuplicateColumn: ERROR: column “notification_level” of relation “user_chat_channel_memberships” already exists (PG::DuplicateColumn)
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/db/pg.rb:110:in exec' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rack-mini-profiler-3.3.1/lib/patches/db/pg.rb:110:in async_exec’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:56:in block (2 levels) in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:1004:in block in with_raw_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-7.2.2.1/lib/active_support/concurrency/null_lock.rb:9:in synchronize' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:976:in with_raw_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:55:in block in raw_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-7.2.2.1/lib/active_support/notifications/instrumenter.rb:58:in instrument’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:1119:in log' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:54:in raw_execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:538:in internal_execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:137:in execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/query_cache.rb:27:in execute' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/database_statements.rb:48:in execute’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/schema_statements.rb:629:in add_column' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/postgresql/schema_statements.rb:418:in add_column’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration/default_strategy.rb:10:in method_missing' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1059:in block in method_missing’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1025:in block in say_with_time' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1025:in say_with_time' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1048:in method_missing’
/var/www/discourse/plugins/chat/db/migrate/20241003122030_add_notification_level_to_user_chat_channel_memberships.rb:10:in up' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:997:in public_send’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:997:in exec_migration' /var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in block in exec_migration’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure' /var/www/discourse/lib/freedom_patches/schema_migration_details.rb:8:in exec_migration’

/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:978:in block (2 levels) in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/benchmark-0.4.0/lib/benchmark.rb:304:in measure’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:977:in block in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:415:in with_connection’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:976:in migrate' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1190:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1538:in block in execute_migration_in_transaction' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1591:in ddl_transaction’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1537:in execute_migration_in_transaction' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1512:in each’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1512:in migrate_without_lock' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1457:in block in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1609:in with_advisory_lock' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1457:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1264:in up' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/migration.rb:1239:in migrate’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activerecord-7.2.2.1/lib/active_record/tasks/database_tasks.rb:262:in migrate' /var/www/discourse/lib/tasks/db.rake:259:in block (2 levels) in ’
/var/www/discourse/lib/distributed_mutex.rb:53:in block in synchronize' /var/www/discourse/lib/distributed_mutex.rb:49:in synchronize’
/var/www/discourse/lib/distributed_mutex.rb:49:in synchronize' /var/www/discourse/lib/distributed_mutex.rb:34:in synchronize’
/var/www/discourse/lib/tasks/db.rake:234:in block in <main>' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/rake-13.2.1/exe/rake:27:in <top (required)>’
任务：TOP => db:migrate
（通过运行任务并添加 --trace 参数可查看完整堆栈跟踪）
/var/www/discourse/lib/discourse.rb:173:in execute_command' /var/www/discourse/lib/discourse.rb:139:in exec’
/var/www/discourse/lib/discourse.rb:35:in execute_command' /var/www/discourse/lib/backup_restore/database_restorer.rb:153:in migrate_database’
/var/www/discourse/lib/backup_restore/database_restorer.rb:28:in restore' /var/www/discourse/lib/backup_restore/restorer.rb:61:in run’
script/discourse:191:in restore' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.3.2/lib/thor/command.rb:28:in run’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.3.2/lib/thor/invocation.rb:127:in invoke_command' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.3.2/lib/thor.rb:538:in dispatch’
/var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.3.2/lib/thor/base.rb:584:in start' script/discourse:345:in <top (required)>’
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/cli/exec.rb:58:in load' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/cli/exec.rb:58:in kernel_load’
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/cli/exec.rb:23:in run' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/cli.rb:455:in exec’
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/vendor/thor/lib/thor/command.rb:28:in `run’

/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in invoke_command' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/vendor/thor/lib/thor.rb:527:in dispatch’
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/cli.rb:35:in dispatch' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/vendor/thor/lib/thor/base.rb:584:in start’
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/cli.rb:29:in start' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/exe/bundle:28:in block in <top (required)>’
/usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/lib/bundler/friendly_errors.rb:117:in with_friendly_errors' /usr/local/lib/ruby/gems/3.3.0/gems/bundler-2.5.18/exe/bundle:20:in <top (required)>’
/usr/local/bin/bundle:25:in load' /usr/local/bin/bundle:25:in ’
正在尝试回滚…
正在回滚…
正在清理…
正在从 discourse_functions 架构中删除函数…
正在移除临时目录 ‘/var/www/discourse/tmp/restores/default/2025-01-09-180715’…
正在取消暂停 sidekiq…
正在标记恢复为完成…
正在通知“系统”恢复已结束…
完成！
[失败]

2

如何修复 SQL 文件以使 db:migrate 成功运行？

3

旧站点使用的是哪个提交？

出现了一些回归问题，其中一个提交包含了不应包含的迁移。我猜这可能是其中一种情况。

4

两个实例上的插件是否完全相同？
您现有的 Discourse 是基于哪个提交，聊天插件又是基于哪个提交？

5

感谢您的热心参与。SQL转储文件有45GB，处理起来非常耗时。
我尝试在12月31日运行GUI更新，导致数据库迁移卡住。旧网站自1月6日以来已无法访问，我只有SQL转储文件和保存的媒体上传文件。我正在尝试启动一个新网站并在那里恢复我的数据库。我只运行了YAML中的几个插件：

6

您的备份文件名是什么？（它包含有关上次运行的迁移的信息）

7

sitename-2025-01-06-033732-v20240912212253.sql.gz

进行手动恢复时，报告了以下问题（可能也意味着什么）：
psql:/shared/backups/default/da-stereo-2025-01-06-033732-v20240912212253.sql:842596361: ERROR: 无法创建唯一索引“category_featured_topics_pkey”
DETAIL: 键 (id)=(14) 重复。
psql:/shared/backups/default/da-stereo-2025-01-06-033732-v20240912212253.sql:842596928: ERROR: 无法创建唯一索引“incoming_links_pkey”
DETAIL: 键 (id)=(1) 重复。
psql:/shared/backups/default/da-stereo-2025-01-06-033732-v20240912212253.sql:842596937: ERROR: 无法创建唯一索引“incoming_referers_pkey”
DETAIL: 键 (id)=(1) 重复。
psql:/shared/backups/default/da-stereo-2025-01-06-033732-v20240912212253.sql:842597117: ERROR: 无法创建唯一索引“post_hotlinked_media_pkey”
DETAIL: 键 (id)=(1) 重复。
psql:/shared/backups/default/da-stereo-2025-01-06-033732-v20240912212253.sql:842597378: ERROR: 无法创建唯一索引“sitemaps_pkey”
DETAIL: 键 (id)=(2) 重复。
psql:/shared/backups/default/da-stereo-2025-01-06-033732-v20240912212253.sql:842597693: ERROR: 无法创建唯一索引“upload_references_pkey”
DETAIL: 键 (id)=(8) 重复。

8

这很有趣。

  • 这些冲突发生在相当琐碎的表上，并且冲突的 ID 较低
  • 您的备份来自九月，而 column "notification_level" of relation "user_chat_channel_memberships" already exists 迁移来自十月，因此它没有在您之前的实例上运行，并且它是恢复后最早运行的迁移之一。

在我看来，这听起来像是您遇到了其他问题。这是一个标准的安装吗？您之前的实例是标准安装吗？我有一种预感，备份没有在正确的模式下恢复，并且迁移正在针对一个空白实例运行。

9

是的，这是一个标准的 docker 安装，我的原始站点是使用此手册在 2015 年创建的。

有什么可以从 postgres 或 rails 控制台提取的信息来阐明发生了什么吗？

10

谢谢，
任何提示、技巧或指导都将不胜感激。

11

您是指仅 SQL 的 Discourse 备份，还是您以其他方式创建的某个 SQL 转储？

12

Discourse 仅备份。

在家中，我设置了 PostgreSQL，并且我们的数据备份几乎毫无问题地恢复了。
似乎在 PostgreSQL（位于 Discourse 容器内）中恢复文件时，旧数据库未被删除，这导致冲突，阻止了备份的正确部署。

13

这听起来像是理查德说的那样。

最近有一些关于 postgres 的提交，但不确定它们是否已被接受。在再次尝试恢复之前，你可以尝试重新构建。

14

在恢复 sql.gz 存档时，我看到以下内容：
…
正在将存档复制到临时目录…
正在提取转储文件…
正在验证元数据…
当前版本：20241224191732
恢复版本：20240912212253

并且很明显 db:migration 会因帖子 #1 中报告的错误而失败。

我看到 postgres 数据库“discourse”已恢复，其中包含所有必需的表/数据：
psql (13.18 (Debian 13.18-1.pgdg120+1))
输入“help”以获取帮助。

discourse=> \dn+
                                  模式列表
        名称         |   所有者   |   访问权限    |      描述
---------------------+-----------+------------------------+------------------------
 backup              | discourse |                        |
 discourse_functions | discourse |                        |
 public              | discourse | discourse=UC/discourse+| 标准公共模式
                     |           | =UC/discourse          |
(3 行)

discourse=> discourse=> \l
                                  数据库列表
   名称    |  所有者   | 编码 |   排序规则   |    ctype    |   访问权限
-----------+----------+----------+-------------+-------------+------------------------
 discourse | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =Tc/postgres          +
           |          |          |             |             | postgres=CTc/postgres +
           |          |          |             |             | discourse=CTc/postgres
 postgres  | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
 template0 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres           +
           |          |          |             |             | postgres=CTc/postgres
 template1 | postgres | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/postgres           +
           |          |          |             |             | postgres=CTc/postgres
(4 行)

但 rake 报告它正在使用错误的数据库：

rake db:version

数据库： discourse
当前版本：20241224191732

如何将 rake 指向 20240912212253？

谢谢

15

当出现权限问题时，就会发生这种情况。Discourse 在恢复过程中会处理模式，当它没有权限枚举数据库中的表时，事情就会变得糟糕。

虽然我从未遇到过这种情况，但这会不会也是可用磁盘空间的问题？

16

凭直觉：恢复后进行表移动时是否可能发生超时？

17

感谢提示。

磁盘空间不是问题；我的空间是数据库大小的 6-7 倍。在运行迁移并修复权限之前，我可以尝试手动导入。问题是，究竟必须授予什么权限？

18

我认为您需要按以下方式更新手动脚本：

DROP SCHEMA public CASCADE;
CREATE SCHEMA public;
ALTER SCHEMA public OWNER TO discourse;
CREATE EXTENSION IF NOT EXISTS hstore;
CREATE EXTENSION IF NOT EXISTS pg_trgm;
END;

不需要创建 public schema（并设置所有者），因为较新的 Pg 会从 SQL 备份转储创建 schema。
但是，表权限必须固定为 discourse 用户，默认情况下它们是 postgres。

现在可以了！感谢大家提供的想法和支持。