dosubot[bot] commented on issue #7808:
URL:
https://github.com/apache/incubator-devlake/issues/7808#issuecomment-2261121392
<!-- Greeting -->
Hello @amokkapati! I'm here to help you with any questions or bugs you
encounter. Let's tackle this MySQL database backup issue together.
<!-- Answer -->
The error you're encountering, "Access denied for user 'merico'@'localhost'
(using password: YES)," typically indicates an issue with the username or
password used for MySQL authentication.
Here are some steps to troubleshoot and resolve this issue:
1. **Verify MySQL Credentials**:
Ensure that the username and password you are using are correct. The
default MySQL credentials set by DevLake when deployed using Helm are:
- **Username:** `merico`
- **Password:** `merico`
<sup>[[1]](https://github.com/apache/incubator-devlake-website/blob/main/docs/GettingStarted/HelmSetup.md)</sup>.
2. **Check MySQL User Permissions**:
Make sure that the user `merico` has the necessary permissions to access
the `lake` database. You can verify this by logging into MySQL with the
`merico` user and checking the permissions:
```shell
mysql -u merico -p
```
Then, run the following SQL command to check the permissions:
```sql
SHOW GRANTS FOR 'merico'@'localhost';
```
3. **Use Correct Command Syntax**:
Ensure that you are using the correct command syntax for `mysqldump`. The
command should include the `-p` flag without a space before the password prompt:
```shell
mysqldump -u merico -p lake > db.sql
```
After running this command, you will be prompted to enter the password.
Enter `merico` as the password.
4. **Check MySQL Service Status**:
Ensure that the MySQL service is running on your localhost and is
accessible on port 3306. You can check the status of the MySQL service with the
following command:
```shell
sudo systemctl status mysql
```
5. **Check MySQL Configuration**:
Verify that the MySQL server is configured to accept connections from
`localhost`. Check the MySQL configuration file (usually located at
`/etc/mysql/my.cnf` or `/etc/mysql/mysql.conf.d/mysqld.cnf`) for the
`bind-address` setting. It should be set to `127.0.0.1` or `0.0.0.0` to allow
connections from localhost.
By following these steps, you should be able to resolve the authentication
error and successfully perform the `mysqldump` backup.
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