DEV Community: Roy

Testing UDP port connectivity

Roy — Tue, 27 Sep 2022 01:29:41 +0000

Answer: Using Ansible to stop service that might not exist

Roy — Thu, 08 Sep 2022 07:50:58 +0000

Jan 19 '21

The following will register the module output in service_stop; if the module execution's standard output does not contain "Could not find the requested service" AND the service fails to stop based on return code, the module execution will fail. Since you did not include the entire stack trace I…

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cheat command

Roy — Fri, 26 Aug 2022 02:12:36 +0000

cheat

压测nginx出现no live upstreams while connecting to upstream的问题分析

Roy — Wed, 24 Aug 2022 08:35:08 +0000

压测nginx出现no live upstreams while connecting to upstream的问题分析

yaml indentation

Roy — Fri, 19 Aug 2022 01:57:48 +0000

https://stackoverflow.com/a/71968274/4016028

Local taskbar visible during remote desktop fullscreen

Roy — Wed, 03 Aug 2022 09:54:39 +0000

Local taskbar visible during remote desktop fullscreen

Why does the dot command (source) not work on files without path in zsh?

Roy — Wed, 03 Aug 2022 05:36:59 +0000

Why does the dot command (source) not work on files without path in zsh?

nginx upstream failover

Roy — Mon, 11 Jul 2022 07:30:04 +0000

proxy_next_upstream

proxy_next_upstream  http_502 http_504 error timeout invalid_header;

nginx, consul, mysql high availability

Roy — Thu, 07 Jul 2022 22:03:19 +0000

昨天晚上睡觉的时候想，可以用nginx为 MySQL 做反向代理，upstream server 只有一个， backup upstream server 则为另一个，这样可以保证只往一个MySQL实例当中写，upstream server 中使用consul提供的域名，由consul提供健康检测，或者用其它机制检测两台MySQL的健康状态，更新 consul kv 存储， consul-template 更新nginx 配置文件

abrt-watch-log

Roy — Wed, 06 Jul 2022 07:07:24 +0000

CPU warning - abrt-watch-log

get available memory in gb using single bash shell command

Roy — Wed, 29 Jun 2022 08:42:37 +0000

awk '/MemFree/ { printf "%.3f \n", $2/1024/1024 }' /proc/meminfo

https://stackoverflow.com/a/34938001/4016028

get the number of cpus

Roy — Wed, 29 Jun 2022 08:34:25 +0000

nproc