在我按照computerforgeeks.com/install-postgresql-on-debian-linux 上的说明操作后它起作用了，但我今天再次尝试运行python manage.py dbbackup，但它不起作用。
我不明白为什么当路径与来自 No such file or directory: '/root/usr/bin/pg_dump' 的路径匹配时会显示 find . -name pg_dump
shell 到 postgres 容器
root@6d515751e154:/# pg_dump --version
pg_dump (PostgreSQL) 13.3 (Debian 13.3-1.pgdg100+1)
root@6d515751e154:/# find . -name pg_dump
./usr/lib/postgresql/13/bin/pg_dump
./usr/bin/pg_dump
base.py
DATABASES = {
"default": {
"ENGINE": os.environ.get("SQL_ENGINE"),
"NAME": os.environ.get("SQL_DATABASE"),
"USER": os.environ.get("SQL_USER"),
"PASSWORD": os.environ.get("SQL_PASSWORD"),
"HOST": os.environ.get("SQL_HOST"),
"PORT": os.environ.get("SQL_PORT"),
}
}
DBBACKUP_STORAGE = 'django.core.files.storage.FileSystemStorage'
DBBACKUP_STORAGE_OPTIONS = {'location': os.path.join(BASE_DIR, '../backups')}
DBBACKUP_CONNECTORS = {
"default": {
"ENGINE": 'django.db.backends.postgresql_psycopg2',
"NAME": os.environ.get("SQL_DATABASE"),
"USER": os.environ.get("SQL_USER"),
"PASSWORD": os.environ.get("SQL_PASSWORD"),
"HOST": os.environ.get("SQL_HOST"),
"PORT": os.environ.get("SQL_PORT"),
# "DUMP_CMD": os.path.join( # Tried both of these
# os.environ['HOME'],
# "usr",
# "bin",
# "pg_dump"
# )
"DUMP_CMD": os.path.join( # Tried both of these
os.environ['HOME'],
"usr",
"lib",
"postgresql",
"13",
"bin",
"pg_dump"
)
}
}
回溯 1：
Backing Up Database: postgres
CommandConnectorError: Error running: /root/usr/bin/pg_dump --host=pgdb --port=5432 --username=postgres --no-password --clean postgres
[Errno 2] No such file or directory: '/root/usr/bin/pg_dump'
File "/usr/local/lib/python3.8/site-packages/dbbackup/utils.py", line 118, in wrapper
func(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 61, in handle
self._save_new_backup(database)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 74, in _save_new_backup
outputfile = self.connector.create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 78, in create_dump
dump = self._create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 38, in _create_dump
stdout, stderr = self.run_command(cmd, env=self.dump_env)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 21, in run_command
return super(PgDumpConnector, self).run_command(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 156, in run_command
raise exceptions.CommandConnectorError(
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 146, in run_command
process = Popen(cmd, stdin=stdin, stdout=stdout, stderr=stderr, env=full_env)
File "/usr/local/lib/python3.8/subprocess.py", line 854, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "/usr/local/lib/python3.8/subprocess.py", line 1702, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '/root/usr/bin/pg_dump'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 398, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.8/site-packages/dbbackup/utils.py", line 118, in wrapper
func(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 61, in handle
self._save_new_backup(database)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 74, in _save_new_backup
outputfile = self.connector.create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 78, in create_dump
dump = self._create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 38, in _create_dump
stdout, stderr = self.run_command(cmd, env=self.dump_env)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 21, in run_command
return super(PgDumpConnector, self).run_command(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 156, in run_command
raise exceptions.CommandConnectorError(
dbbackup.db.exceptions.CommandConnectorError: Error running: /root/usr/bin/pg_dump --host=pgdb --port=5432 --username=postgres --no-password --clean postgres
[Errno 2] No such file or directory: '/root/usr/bin/pg_dump'
回溯 2：
Backing Up Database: postgres
CommandConnectorError: Error running: /root/usr/lib/postgresql/13/bin/pg_dump --host=pgdb --port=5432 --username=postgres --no-password --clean postgres
[Errno 2] No such file or directory: '/root/usr/lib/postgresql/13/bin/pg_dump'
File "/usr/local/lib/python3.8/site-packages/dbbackup/utils.py", line 118, in wrapper
func(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 61, in handle
self._save_new_backup(database)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 74, in _save_new_backup
outputfile = self.connector.create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 78, in create_dump
dump = self._create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 38, in _create_dump
stdout, stderr = self.run_command(cmd, env=self.dump_env)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 21, in run_command
return super(PgDumpConnector, self).run_command(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 156, in run_command
raise exceptions.CommandConnectorError(
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 146, in run_command
process = Popen(cmd, stdin=stdin, stdout=stdout, stderr=stderr, env=full_env)
File "/usr/local/lib/python3.8/subprocess.py", line 854, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "/usr/local/lib/python3.8/subprocess.py", line 1702, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '/root/usr/lib/postgresql/13/bin/pg_dump'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 398, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.8/site-packages/dbbackup/utils.py", line 118, in wrapper
func(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 61, in handle
self._save_new_backup(database)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 74, in _save_new_backup
outputfile = self.connector.create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 78, in create_dump
dump = self._create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 38, in _create_dump
stdout, stderr = self.run_command(cmd, env=self.dump_env)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 21, in run_command
return super(PgDumpConnector, self).run_command(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 156, in run_command
raise exceptions.CommandConnectorError(
dbbackup.db.exceptions.CommandConnectorError: Error running: /root/usr/lib/postgresql/13/bin/pg_dump --host=pgdb --port=5432 --username=postgres --no-password --clean postgres
[Errno 2] No such file or directory: '/root/usr/lib/postgresql/13/bin/pg_dump'
我在单独的 docker 容器上运行 django 服务器（图像 python:3.8.2-slim-buster）和 postgresql（图像 postgres:13）数据库。我正在尝试使用 django-dbbackup 备份数据并遇到此错误。
# python manage.py dbbackup
System check identified some issues:
WARNINGS:
account.EmailAddress: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the AccountConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
account.EmailConfirmation: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the AccountConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
socialaccount.SocialAccount: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the SocialAccountConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
socialaccount.SocialApp: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the SocialAccountConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
socialaccount.SocialToken: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the SocialAccountConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
Backing Up Database: postgres
CommandConnectorError: Error running: pg_dump --host=pgdb --port=5432 --username=postgres --no-password --clean postgres
pg_dump: server version: 13.3 (Debian 13.3-1.pgdg100+1); pg_dump version: 11.12 (Debian 11.12-0+deb10u1)
pg_dump: aborting because of server version mismatch
File "/usr/local/lib/python3.8/site-packages/dbbackup/utils.py", line 118, in wrapper
func(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 61, in handle
self._save_new_backup(database)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 74, in _save_new_backup
outputfile = self.connector.create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 78, in create_dump
dump = self._create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 38, in _create_dump
stdout, stderr = self.run_command(cmd, env=self.dump_env)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 21, in run_command
return super(PgDumpConnector, self).run_command(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 150, in run_command
raise exceptions.CommandConnectorError(
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 398, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.8/site-packages/dbbackup/utils.py", line 118, in wrapper
func(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 61, in handle
self._save_new_backup(database)
File "/usr/local/lib/python3.8/site-packages/dbbackup/management/commands/dbbackup.py", line 74, in _save_new_backup
outputfile = self.connector.create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 78, in create_dump
dump = self._create_dump()
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 38, in _create_dump
stdout, stderr = self.run_command(cmd, env=self.dump_env)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/postgresql.py", line 21, in run_command
return super(PgDumpConnector, self).run_command(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/dbbackup/db/base.py", line 150, in run_command
raise exceptions.CommandConnectorError(
dbbackup.db.exceptions.CommandConnectorError: Error running: pg_dump --host=pgdb --port=5432 --username=postgres --no-password --clean postgres
pg_dump: server version: 13.3 (Debian 13.3-1.pgdg100+1); pg_dump version: 11.12 (Debian 11.12-0+deb10u1)
pg_dump: aborting because of server version mismatch
在寻找答案后，我尝试更新 postgresql-client，但它说我已经有了最新版本。
root@528fdf5ac614:/code/mysite# apt-get install postgresql-client
Reading package lists... Done
Building dependency tree
Reading state information... Done
postgresql-client is already the newest version (11+200+deb10u4).
0 upgraded, 0 newly installed, 0 to remove and 18 not upgraded.
所以我不知道如何继续。我应该使用 postgres:11.12 docker image 降级数据库容器吗？这意味着数据会丢失吗？
另外，为什么错误说 dbbackup.db.exceptions.CommandConnectorError: Error running: pg_dump --host=pgdb --port=5432 --username=postgres --no-password --clean postgres ？ 我已经在 base.py 中设置了密码，如下所示：
base.py 设置
DATABASES = {
"default": {
"ENGINE": os.environ.get("SQL_ENGINE"),
"NAME": os.environ.get("SQL_DATABASE"),
"USER": os.environ.get("SQL_USER"),
"PASSWORD": os.environ.get("SQL_PASSWORD"),
"HOST": os.environ.get("SQL_HOST"),
"PORT": os.environ.get("SQL_PORT"),
}
}
DBBACKUP_CONNECTORS = {
"default": {
"USER": os.environ.get("SQL_USER"),
"PASSWORD": os.environ.get("SQL_PASSWORD"),
"HOST": os.environ.get("SQL_HOST"),
}
}
答案 0 :(得分：0)
你的错误不言自明
pg_dump: server version: 13.3 (Debian 13.3-1.pgdg100+1); pg_dump version: 11.12 (Debian 11.12-0+deb10u1)
您应该在 /postgres/bin/ 下找到用于此安装的 psql 和 pg_dump。这是您要使用的 pg_dump。您可以使用
验证 pg_dump 的版本pg_dump --version
django-dbbackup 允许您指定用于创建备份的连接器。特别是，它允许您指定转储命令 (DUMP_CMD)。要指定连接器，请将以下块添加到 settings.py：
import os # if not yet imported
DBBACKUP_CONNECTORS = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'xxx',
'USER': 'xxx',
'PASSWORD': 'xxx',
'HOST': 'xxx',
'PORT': 'xxx',
'DUMP_CMD': os.path.join(
os.environ["HOME"],
'xxx',
'bin',
'pg_dump'
)
}
}
根据您的安装和用户进行所需的更改。