我正在尝试建立一种简单的方法来对数据库进行定期备份，以支持live rails 5.2应用程序。
在将其部署到服务器之前，我想确保它首先在本地似乎正常工作。
我运行了backup generate:model --trigger=db_backup --databases='postgresql' --storages='local' --compressor='gzip' --notifiers='mail'来生成db_backup.rb文件
由于从我的credentials.yml.enc文件检索参数时出现问题，我开始对信息进行如下硬编码：
db_backup.rb
# encoding: utf-8
##
# Backup Generated: db_backup
# Once configured, you can run the backup with the following command:
#
# $ backup perform -t db_backup [-c <path_to_configuration_file>]
#
# For more information about Backups components, see the documentation at:
# http://backup.github.io/backup
#
Model.new(:db_backup, 'Description for db_backup') do
##
# PostgreSQL [Database]
#
database PostgreSQL do |db|
# To dump all databases, set `db.name = :all` (or leave blank)
db.name = "my_db_name"
db.username = "postgres"
db.password = "my_password"
db.host = "localhost"
db.port = 5432
db.socket = "/tmp/pg.sock"
# When dumping all databases, `skip_tables` and `only_tables` are ignored.
# db.skip_tables = ["skip", "these", "tables"]
# db.only_tables = ["only", "these", "tables"]
# db.additional_options = ["-xc", "-E=utf8"]
end
##
# Local (Copy) [Storage]
#
store_with Local do |local|
local.path = "~/backups/"
local.keep = 20
# local.keep = Time.now - 2592000 # Remove all backups older than 1 month.
end
##
# Gzip [Compressor]
#
compress_with Gzip
##
# Mail [Notifier]
#
# The default delivery method for Mail Notifiers is 'SMTP'.
# See the documentation for other delivery options.
#
notify_by Mail do |mail|
mail.on_success = true
mail.on_warning = true
mail.on_failure = true
mail.from = "my email"
mail.to = "my email"
# mail.cc = "cc@email.com"
# mail.bcc = "bcc@email.com"
# mail.reply_to = "reply_to@email.com"
mail.address = "smtp.gmail.com"
mail.port = 587
mail.domain = "mail.google.com"
mail.user_name = "my email"
mail.password = "my_password!"
mail.authentication = "login"
mail.encryption = :starttls
end
end
运行上面的代码（backup perform -t db_backup）会产生错误：
[2018/10/02 21:29:25][info] Database::PostgreSQL Started...
[2018/10/02 21:29:25][info] Using Compressor::Gzip for compression.
[2018/10/02 21:29:25][info] Command: '/usr/bin/gzip'
[2018/10/02 21:29:25][info] Ext: '.gz'
[2018/10/02 21:29:25][error] Model::Error: Backup for Description for db_backup (db_backup) Failed!
[2018/10/02 21:29:25][error] --- Wrapped Exception ---
[2018/10/02 21:29:25][error] Database::PostgreSQL::Error: Dump Failed!
[2018/10/02 21:29:25][error] Pipeline STDERR Messages:
[2018/10/02 21:29:25][error] (Note: may be interleaved if multiple commands returned error messages)
[2018/10/02 21:29:25][error]
[2018/10/02 21:29:25][error] pg_dump: [archiver (db)] connection to database "my_db_name" failed: could not connect to server: No such file or directory
[2018/10/02 21:29:25][error] Is the server running locally and accepting
[2018/10/02 21:29:25][error] connections on Unix domain socket "/tmp/pg.sock/.s.PGSQL.5432"?
[2018/10/02 21:29:25][error] The following system errors were returned:
[2018/10/02 21:29:25][error] Errno::EPERM: Operation not permitted - 'pg_dump' returned exit code: 1
对此问题进行阅读似乎是一个相对普遍的问题，尤其是对于Mac用户而言，但我还没有找到一个明确的解决方案
从命令行运行pg_dump -U postgres -h localhost -p 5432 my_db_name > name_of_backup_file可以成功运行，并在当前文件夹中生成数据库的备份
感谢您的帮助