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我已经使用以下软件版本配置了两台具有冗余配置(master-master setup)的 RHEL 机器。

  • 数据库:PostgreSQL 9.5
  • 布卡多:布卡多 5.4

数据库复制一直顺利进行,直到某个时间点,之后复制突然停止。我可以在 bucardo 日志中看到以下语句。

*KID (database_sync) Conflicts for public.interface: 4
KID (database_sync) Conflicts have been resolved
KID (database_sync) Warning! Aborting due to exception for public.interface:? Error was DBD::Pg::db pg_putcopyend failed: ERROR:  duplicate key value violates unique constraint "interface_nodeid_ifindex_unique_idx"\nDETAIL:  Key (nodeid, ifindex)=(81, 1) already exists.\nCONTEXT:  COPY interface, line 2 at /usr/share/perl5/vendor_perl/Bucardo.pm line 9879.
KID (database_sync) Kid has died, error is: DBD::Pg::db pg_putcopyend failed: ERROR:  duplicate key value violates unique constraint "interface_nodeid_ifindex_unique_idx"\nDETAIL:  Key (nodeid, ifindex)=(81, 1) already exists.\nCONTEXT:  COPY interface, line 2 at /usr/share/perl5/vendor_perl/Bucardo.pm line 9879. Line: 5041 Main DB state: ? Error: none DB database_node1 state: ? Error: none DB database_node2 state: 23505 Error: 7
DBI::db=HASH(0x2e1a708)->disconnect invalidates 9 active statement handles (either destroy statement handles or call finish on them before disconnecting) at /usr/share/perl5/vendor_perl/Bucardo.pm line 2756.
DBI::db=HASH(0x2e1a828)->disconnect invalidates 9 active statement handles (either destroy statement handles or call finish on them before disconnecting) at /usr/share/perl5/vendor_perl/Bucardo.pm line 2756.
KID (database_sync) Kid 22825 exiting at cleanup_kid. Sync "database_sync" public.interface Reason: DBD::Pg::db pg_putcopyend failed: ERROR:  duplicate key value violates unique constraint "interface_nodeid_ifindex_unique_idx"\nDETAIL:  Key (nodeid, ifindex)=(81, 1) already exists.\nCONTEXT:  COPY interface, line 2 at /usr/share/perl5/vendor_perl/Bucardo.pm line 9879. Line: 5041 Main DB state:

? 错误:无 DB database_node1 状态:?错误:无 DB database_node2 状态:23505 错误:7 MCP 启动 check_sync_health*

以下是我创建同步所遵循的步骤。

bucardo add database bucardo add table all --db="$database"_node1    --herd="$database"_herd 
bucardo add sequence all --db="$database"_node1 --herd="$database"_herd 
bucardo add dbgoup "$database"_group 
bucardo add dbgroup "$database"_group    "$database"_node1:source 
bucardo add dbgroup "$database"_group    "$database"_node2:source 
bucardo add sync "$database"_sync    herd="$database_herd"_herd dbs="$database"_group    conflict_strategy=bucardo_latest onetimecopy=2 stayalive=1    kidsalive=1 autokick=1 systemctl enable bucardo.service

你能帮我解决这个问题吗?我的数据库中的序列可以负责在数据库中创建重复条目吗?

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1 回答 1

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当用户使用 Bucardo 序列的多源设置时,不得复制,否则会出现冲突,因为您已经进行了实验。

  • 从同步中删除序列。我是凭记忆写的,而不是测试它,所以要小心
bucardo remove sequence all
bucardo validate all
bucardo reload
  • 更改每个源中的序列以避免在两个数据库中创建相同的主键。检查这个答案有几个选项,比如生成偶数、奇数;在 db1 中生成 1、11、21 等数字,在 db2 中生成 2、12、22,...;或使用 UUID。
于 2020-07-04T18:03:15.857 回答