默认日志路径：/var/log/mysqld.log 杭州飞致云信息科技有限公司 23 使用如下命令查看日志： tail -f /var/log/mysqld.log 6.3 Nginx 服务日志 Nginx 默认日志路径：/var/log/nginx；其中 access.log 为访问日志，error.log 为错误日志。 使用如下命令查看日志： tail -f /var/log/nginx/error /var/log/nginx/error.log 七、监控服务 7.1 服务说明 1）此监控服务采用部署包形式通过云管平台导入进行安装部署，能自动拉取客户端监控数 据，通过数据可视化展示，并且将异常数据通过监控告警邮件直接发送至管理员邮箱。解决 了服务器信息数据不直观、异常信息不能及时发现等问题。 2）组件：  使用 Exporter 收集客户机指标  使用 Prometheus Server 抓取数据

Stability When you use Git to manage your Kubernetes cluster, you automatically gain a convenient audit log of all cluster changes outside of Kubernetes. An audit trail of who did what, and when to your cluster PART 1: SPIN UP A KUBERNETES CLUSTER eBook 15 1. Create three droplets in Digital Ocean Sign up or log into Digital Ocean and create three Ubuntu instances with the following specifications: • Ubuntu 16 Container Registry Account at Quay Sign up for a Quay.io account, and record the user name. After you log in, you can see it under “Users and Organizations” on the top right of the repositories page. Create

revert/rollback and fork in the case of a catastrophic event. Meet compliance requirements Build an audit log of all cluster changes and attribution that meets SOC 2 compliance just by using Git. Standardize

manage all deployments both infrastructure changes and code, you automatically generate a full audit log of all cluster changes made outside of Kubernetes. In short, it tells you who did what, and when.

linux 下的 mv 操作之所以能跨文件系统，是因为它是通过 read 源文件，然后 write 目标文件的方式实现的：© XXX Page 10 of 15 mv $ strace -o log sh -c 'mv srcfile /tmp/dstfile' ... rename("srcfile", "/tmp/dstfile") = -1 EXDEV (Invalid cross-device

the result is the same each time, so the operation is idempo- tent. In contrast, adding a line to a log file leaves multiple lines for the event, so it is not idempotent. This issue doesn’t seem obvious