Я пытаюсь запустить приложение Django + PostgreSQL в кластере Google Cloud в Kubernetes.Я успешно развернул следующие файлы:
- Развертывание приложения Django
- Служба приложения Django
- Секретный объект Kubernetes для учетных данных БД
- PersistentVolumeClaim
Но у меня возникают проблемы при развертывании моей базы данных PostgreSQL в кластере.Вот определение моего файла .yml:
apiVersion: v1
kind: Service
metadata:
name: postgres-service
spec:
selector:
app: postgres-container
tier: backend
ports:
- protocol: TCP
port: 5432
targetPort: 5432
type: ClusterIP
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: postgres-pvc
labels:
type: local
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 2Gi
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: postgres
spec:
replicas: 1
selector:
matchLabels:
app: postgres-container
tier: backend
template:
metadata:
labels:
app: postgres-container
tier: backend
spec:
containers:
- name: postgres-container
image: postgres:9.6.6
env:
- name: POSTGRES_USER
valueFrom:
secretKeyRef:
name: postgres-credentials
key: user
- name: POSTGRES_PASSWORD
valueFrom:
secretKeyRef:
name: postgres-credentials
key: password
- name: POSTGRES_DB
value: agent_technologies_db
ports:
- containerPort: 5432
volumeMounts:
- name: postgres-volume-mount
mountPath: /var/lib/postgresql/data
volumes:
- name: postgres-volume-mount
persistentVolumeClaim:
claimName: postgres-pvc
- name: postgres-credentials
secret:
secretName: postgres-credentials
А вот ошибка, которую я получаю, когда запускаю команду kubectl logs postgres-85c56dfb9b-95c74
:
initdb: directory "/var/lib/postgresql/data" exists but is not empty
It contains a lost+found directory, perhaps due to it being a mount point.
Using a mount point directly as the data directory is not recommended.
Create a subdirectory under the mount point.
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.
The database cluster will be initialized with locale "en_US.utf8".
The default database encoding has accordingly been set to "UTF8".
The default text search configuration will be set to "english".
Может кто-нибудь объяснить эту ошибкумне.Заранее спасибо!
***** ОБНОВЛЕНИЕ ******
Когда я запускаю kubectl logs $pod
Я получаю следующую ошибку (даже если контейнер работает в кластере):
Host: 10.52.1.5
Production - Using "POSTGRESQL" Database
/usr/local/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
""")
Host: 10.52.1.5
Production - Using "POSTGRESQL" Database
/usr/local/lib/python3.6/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
""")
Performing system checks...
System check identified no issues (0 silenced).
Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7f62f4c948c8>
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
self.connect()
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 194, in connect
self.connection = self.get_new_connection(conn_params)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 168, in get_new_connection
connection = Database.connect(**conn_params)
File "/usr/local/lib/python3.6/site-packages/psycopg2/__init__.py", line 130, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/django/utils/autoreload.py", line 225, in wrapper
fn(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 124, in inner_run
self.check_migrations()
File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 427, in check_migrations
executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/executor.py", line 18, in __init__
self.loader = MigrationLoader(self.connection)
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/loader.py", line 49, in __init__
self.build_graph()
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/loader.py", line 206, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 61, in applied_migrations
if self.has_table():
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 44, in has_table
return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 255, in cursor
return self._cursor()
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 232, in _cursor
self.ensure_connection()
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
self.connect()
File "/usr/local/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
self.connect()
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 194, in connect
self.connection = self.get_new_connection(conn_params)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 168, in get_new_connection
connection = Database.connect(**conn_params)
File "/usr/local/lib/python3.6/site-packages/psycopg2/__init__.py", line 130, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
Это из моего файла settings.py:
import socket
print("Host: "+socket.gethostbyname(socket.gethostname()))
if(os.getenv('POSTGRES_DB_HOST')==None):
print('Development - Using "SQLITE3" Database')
DATABASES = {
'default':{
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR,'db.sqlite3'),
}
}
else:
print('Production - Using "POSTGRESQL" Database')
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'agent_technologies_db',
'USER': 'stefan_radonjic',
'PASSWORD': 'cepajecar995',
'HOST': os.getenv('POSTGRES_HOST'),
'PORT': os.getenv('POSTGRES_PORT'),
}
}
Может ли ошибка, которую я получаю при запуске команды kubectl logs $pod
, быть в том факте, что константа PostgreSQL не являетсяработает так что не может его найти или?Если кого-то интересуют другие файлы моего проекта, вот ссылка на github: https://github.com/StefanCepa/agent-technologies-bachelor