The MySQL server is running with the --event-scheduler=DISABLED or --skip-grant-tables option so it cannot execute this statement

这个错误提示意味着MySQL服务器正在使用`--event-scheduler=DISABLED`或`--skip-grant-tables`选项运行，因此无法执行该语句。这两个选项的作用如下：

1. `--event-scheduler=DISABLED`：禁用事件调度器。事件调度器是MySQL中用于执行预定事件的功能。如果该选项被启用，那么MySQL将无法执行任何预定事件。

2. `--skip-grant-tables`：跳过权限验证。启用该选项后，MySQL将不会对用户进行身份验证，任何用户都可以执行任何操作。这通常用于紧急情况下恢复丢失的管理员密码或修复权限问题。

如果你想要执行该语句，你需要修改MySQL服务器的配置，确保事件调度器处于启用状态，并且权限验证正常工作。你可以通过以下步骤来解决这个问题：

1. 打开MySQL配置文件（通常是`my.cnf`或`my.ini`）。

2. 搜索`event-scheduler`选项，并确保其值为`ON`，即启用状态。如果没有找到该选项，可以手动添加以下行：

   event-scheduler=ON

3. 保存并关闭配置文件。

4. 重启MySQL服务器，使配置更改生效。

这样，MySQL服务器就会启用事件调度器，并能够执行预定事件。

相关问题

Job for openstack-nova-scheduler.service failed because the control process exited with error code.

在Linux系统中，当服务启动失败时，通常会提示“Job for xxx.service failed because the control process exited with error code. See 'systemctl status xxx.service' and 'journalctl -xe' for details.”这个错误信息。这个错误信息提示我们可以通过运行'systemctl status xxx.service'和'journalctl -xe'来查看详细的错误信息。

对于'Job for openstack-nova-scheduler.service failed because the control process exited with error code.'这个错误，我们可以按照以下步骤来解决：

1. 运行'systemctl status openstack-nova-scheduler.service'命令来查看服务的状态和错误信息。

2. 运行'journalctl -xe'命令来查看系统日志，找到与服务启动相关的错误信息。

3. 根据错误信息来修复问题。可能的解决方案包括重新安装服务、更新配置文件、检查依赖项等。

以下是一个例子，演示如何通过运行'systemctl status'和'journalctl -xe'来查看错误信息并解决问题：

$ systemctl status openstack-nova-scheduler.service
● openstack-nova-scheduler.service - OpenStack Nova Scheduler Server
   Loaded: loaded (/usr/lib/systemd/system/openstack-nova-scheduler.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2021-11-02 10:00:00 CST; 5s ago
  Process: 1234 ExecStart=/usr/bin/nova-scheduler (code=exited, status=1/FAILURE)
 Main PID: 1234 (code=exited, status=1/FAILURE)

Nov 02 10:00:00 server systemd[1]: Starting OpenStack Nova Scheduler Server...
Nov 02 10:00:00 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 1 seconds.
Nov 02 10:00:01 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 2 seconds.
Nov 02 10:00:03 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 4 seconds.
Nov 02 10:00:07 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 8 seconds.
Nov 02 10:00:15 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 16 seconds.
Nov 02 10:00:31 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 32 seconds.
Nov 02 10:01:03 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 64 seconds.
Nov 02 10:02:07 server systemd[1]: openstack-nova-scheduler.service: main process exited, code=exited, status=1/FAILURE
Nov 02 10:02:07 server systemd[1]: Failed to start OpenStack Nova Scheduler Server.

从上面的输出中，我们可以看到服务启动失败，错误信息是“Unable to connect to AMQP server: [Errno 111] ECONNREFUSED.”。这个错误提示我们无法连接到AMQP服务器，可能是由于AMQP服务器未启动或配置错误导致的。

接下来，我们可以运行'journalctl -xe'命令来查看系统日志，找到与服务启动相关的错误信息：

$ journalctl -xe
...
Nov 02 10:00:00 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 1 seconds.
Nov 02 10:00:01 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 2 seconds.
Nov 02 10:00:03 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 4 seconds.
Nov 02 10:00:07 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 8 seconds.
Nov 02 10:00:15 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 16 seconds.
Nov 02 10:00:31 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 32 seconds.
Nov 02 10:01:03 server nova-scheduler[1234]: ERROR: Unable to connect to AMQP server: [Errno 111] ECONNREFUSED. Trying again in 64 seconds.
...

从上面的输出中，我们可以看到与服务启动相关的错误信息是“Unable to connect to AMQP server: [Errno 111] ECONNREFUSED.”，这个错误信息与'systemctl status'命令输出的错误信息是一致的。

因此，我们可以得出结论，服务启动失败是由于无法连接到AMQP服务器导致的。我们需要检查AMQP服务器是否已启动，并确保配置文件中的AMQP服务器地址和端口号正确。

The connection to the server 192.168.220.3:6443 was refused - did you specify the right host or port?

This error message usually appears when you are trying to connect to a Kubernetes cluster and the connection to the API server is not successful. This can happen due to various reasons such as incorrect host or port number, network connectivity issues, or authentication problems.

To resolve this issue, you can try the following steps:

1. Check if the Kubernetes cluster is running and the API server is accessible.
2. Verify that you have specified the correct host and port number.
3. Check if there are any network connectivity issues between your machine and the Kubernetes cluster.
4. Ensure that you have the necessary authentication credentials to access the Kubernetes cluster.
5. Check the logs of the Kubernetes components such as kube-apiserver, kube-controller-manager, and kube-scheduler for any errors or warnings.

If none of the above steps work, you can try reaching out to the cluster administrator for further assistance.