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我已经安排了我的 CKAN 数据库的备份，该数据库使用 cron 驻留在远程 UNIX 机器上。我使用以下代码运行一个简单的脚本：

. /usr/lib/ckan/default/bin/activate
cd /usr/lib/ckan/default/src/ckan

paster db dump --config=/etc/ckan/default/production.ini /home/gisadmin/CKAN_backup_tmp.pg

当我手动运行脚本时，它总是成功的。但是，cron 作业有时会成功运行，有时会失败并显示以下错误消息。为了测试这一点，我将作业安排为每小时运行一次，它成功了大约一半的时间，但我看不到真正的模式。

Traceback (most recent call last):
  File "/usr/lib/ckan/default/bin/paster", line 9, in <module>
    load_entry_point('PasteScript==1.7.5', 'console_scripts', 'paster')()
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/paste/script/command.py", line 104, in run
    invoke(command, command_name, options, args[1:])
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/paste/script/command.py", line 143, in invoke
    exit_code = runner.run(args)
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/paste/script/command.py", line 238, in run
    result = self.command()
  File "/usr/lib/ckan/default/src/ckan/ckan/lib/cli.py", line 141, in command
    self._load_config()
  File "/usr/lib/ckan/default/src/ckan/ckan/lib/cli.py", line 96, in _load_config
    load_environment(conf.global_conf, conf.local_conf)
  File "/usr/lib/ckan/default/src/ckan/ckan/config/environment.py", line 232, in load_environment
    p.load_all(config)
  File "/usr/lib/ckan/default/src/ckan/ckan/plugins/core.py", line 134, in load_all
    load(*plugins)
  File "/usr/lib/ckan/default/src/ckan/ckan/plugins/core.py", line 167, in load
    plugins_update()
  File "/usr/lib/ckan/default/src/ckan/ckan/plugins/core.py", line 116, in plugins_update
    environment.update_config()
  File "/usr/lib/ckan/default/src/ckan/ckan/config/environment.py", line 357, in update_config
    plugin.configure(config)
  File "/usr/lib/ckan/default/src/ckan/ckanext/datastore/plugin.py", line 77, in configure
    self._check_urls_and_permissions()
  File "/usr/lib/ckan/default/src/ckan/ckanext/datastore/plugin.py", line 121, in _check_urls_and_permissions
    if not self._read_connection_has_correct_privileges():
  File "/usr/lib/ckan/default/src/ckan/ckanext/datastore/plugin.py", line 164, in _read_connection_has_correct_privileges
    write_connection.execute(u'CREATE TABLE _foo ()')
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1449, in execute
    params)
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1628, in _execute_text
    statement, parameters
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1698, in _execute_context
    context)
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1691, in _execute_context
    context)
  File "/usr/lib/ckan/default/local/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 331, in do_execute
    cursor.execute(statement, parameters)
sqlalchemy.exc.IntegrityError: (IntegrityError) duplicate key value violates unique constraint "pg_type_typname_nsp_index"
DETAIL:  Key (typname, typnamespace)=(_foo, 2200) already exists.
 'CREATE TABLE _foo ()' {}

任何帮助是极大的赞赏。

谢谢。

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1 回答 1

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我认为这是数据存储代码中的错误。如果您在运行备份之前禁用数据存储插件，则不应发生这种情况。例如，您可以创建一个production.ini完全相同的文件副本，但删除了数据存储插件，并将其用于paster db dump命令。

或者，您可以直接使用 PostgreSQL 的pg_dump命令。

请注意，在备份 CKAN 站点时，需要备份一些内容：

  1. CKAN 的默认“目录”数据库，paster db dump命令还是pg_dump会得到这个。
  2. DataStore 数据库，我不认为paster db dump得到这个，但它应该是可能的pg_dump。
  3. FileStore 的存储目录的内容，如果您正在使用它。rsync将是一种简单的方法来支持这一点。
  4. 您的配置文件
于 2014-11-01T10:42:05.760 回答