我试图连接mysql容器与我的python flask应用程序，我在运行docker-compose build --no-cache && docker-compose up时出现此错误:
Creating network "hdbresalepricealert_sql_network" with the default driver
Creating hdbresalepricealert_mysql_1 ... done
Creating hdbresalepricealert_python_app_1 ... done
Attaching to hdbresalepricealert_mysql_1, hdbresalepricealert_python_app_1
mysql_1 | 2023-12-22 04:48:45+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.2.0-1.el8 started.
mysql_1 | 2023-12-22 04:48:46+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
mysql_1 | 2023-12-22 04:48:46+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.2.0-1.el8 started.
mysql_1 | '/var/lib/mysql/mysql.sock' -> '/var/run/mysqld/mysqld.sock'
mysql_1 | 2023-12-22T04:48:46.269421Z 0 [System] [MY-015015] [Server] MySQL Server - start.
mysql_1 | 2023-12-22T04:48:46.860627Z 0 [Warning] [MY-011068] [Server] The syntax '--skip-host-cache' is deprecated and will be removed in a future release. Please use SET GLOBAL host_cache_size=0 instead.
mysql_1 | 2023-12-22T04:48:46.866169Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.2.0) starting as process 1
mysql_1 | 2023-12-22T04:48:46.891660Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
mysql_1 | 2023-12-22T04:48:47.157634Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
mysql_1 | 2023-12-22T04:48:47.482067Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
mysql_1 | 2023-12-22T04:48:47.482195Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
mysql_1 | 2023-12-22T04:48:47.485815Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
mysql_1 | 2023-12-22T04:48:47.512210Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
mysql_1 | 2023-12-22T04:48:47.512345Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.2.0' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server - GPL.
python_app_1 | INFO:services.dbService:Entering create tables method from dbservice
python_app_1 | ERROR:services.dbService:Unable to create tables due to 2003 (HY000): Can't connect to MySQL server on 'mysql:3307' (111)
python_app_1 | * Serving Flask app 'app'
python_app_1 | * Debug mode: on
python_app_1 | INFO:werkzeug:WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
python_app_1 | * Running on all addresses (0.0.0.0)
python_app_1 | * Running on http://127.0.0.1:5000
python_app_1 | * Running on http://172.22.0.3:5000
python_app_1 | INFO:werkzeug:Press CTRL+C to quit
python_app_1 | INFO:werkzeug: * Restarting with stat
python_app_1 | INFO:services.dbService:Entering create tables method from dbservice
python_app_1 | ERROR:services.dbService:Unable to create tables due to 2003 (HY000): Can't connect to MySQL server on 'mysql:3307' (111)
python_app_1 | WARNING:werkzeug: * Debugger is active!
python_app_1 | INFO:werkzeug: * Debugger PIN: 111-520-781
我的Docker-Compose文件:
version: '3'
services:
mysql:
image: mysql:latest
ports:
- "3307:3306"
environment:
MYSQL_ROOT_PASSWORD: root
MYSQL_DATABASE: db
MYSQL_USER: user
MYSQL_PASSWORD: password
networks:
- sql_network
volumes:
- /mysql_data :/var/lib/mysql
python_app:
build: .
ports:
- "5000:5000"
networks:
- sql_network
depends_on:
- mysql
networks:
sql_network:
DbService.py的相关部分:
config = {
'host': 'mysql', # This should match the service name in Docker Compose
'port': '3307', # This should match the exposed port on the host
'user': 'user',
'password': 'password',
'database': 'db',
}
def create_tables():
logger.info("Entering create tables method from dbservice")
try:
connection = mysql.connector.connect(**config)
cursor = connection.cursor()
# Check if 'emails' table already exists
cursor.execute("SHOW TABLES LIKE 'emails'")
table_exists = cursor.fetchone()
if not table_exists:
cursor.execute(
'''
CREATE TABLE emails (
id INT PRIMARY KEY AUTO_INCREMENT,
created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
email VARCHAR(255) NOT NULL,
verified BOOLEAN NOT NULL,
flatType VARCHAR(255) NOT NULL,
streetName VARCHAR(255) NOT NULL,
blkFrom INT NOT NULL,
blkTo INT NOT NULL,
lastSent TIMESTAMP,
token VARCHAR(255))
''')
connection.commit()
connection.close()
except Exception as e:
logger.error(f"Unable to create tables due to {e}")
我的docker文件:
FROM python:3.12.1-bullseye
ARG REPO_DIR="."
ARG PROJECT_USER="randy"
ARG HOME_DIR="/home/$PROJECT_USER"
ARG DESTINATION_FOLDER="hdb"
WORKDIR $HOME_DIR
# The copy is from local (where the docker command is executed) to this
COPY $REPO_DIR $DESTINATION_FOLDER
RUN pip install -r $DESTINATION_FOLDER/app/run-requirements.txt
RUN groupadd -g 2222 $PROJECT_USER && useradd -u 2222 -g 2222 -m $PROJECT_USER
RUN chown -R 2222:2222 $HOME_DIR && \
rm /bin/sh && ln -s /bin/bash /bin/sh
USER 2222
WORKDIR $HOME_DIR/${DESTINATION_FOLDER}
CMD [ "python3", "app/app.py" ]
我的app.py的相关部分:
time.sleep(10)
create_tables()
本质上，我try 首先使用dbservice.py中的CREATE TABLES函数创建表，我将等待包括在内，因为我读到如果我在MySQL容器打开之前连接，可能会出现一些问题.
我可以使用docker exec -it <container image> bash连接到SQL容器并登录，没有问题，我看到容器已经启动并在docker-compose PS中运行.我只是在运行docker-compose build --no-cache && docker-compose up的时候无法连接到MySQL容器.这个问题困扰了我好几天，我已经在网上搜索了所有可能的解决方案，包括聊天，但都没有结果.我想这可能是我遗漏了一些小问题.有谁能帮忙吗？