Write the top to file and sed

top -b -n 30 -d 1 > top_out

# -b is batch mode
#-n is the 30 runs
# -d is 1 second to write

# out the fille
sed -n 100p top_out

or 

sed -n "100,$ p" test_out



# Ref
http://linux.vbird.org/linux_basic/0440processcontrol/0440processcontrol-fc4.php

apache log format

From http://adam-dragon.blogspot.com/2011/05/apache-log.html

Apache Custom Log Formats (如果翻譯的不對，請糾正。)

Format String Description
%% 百分比符號
%a 遠端 IP 位址
%A 本機 IP 位址
%B 回應一個 request 的大小 (bytes)，含 HTTP headers
%b 以 CLF 格式回應一個 request 的大小 (bytes)，含 HTTP headers
%{Foobar}C 傳送到伺服器的 Foobar cookie 的內容
%D request 傳送到伺服器的時間 (microseconds)
%{FOOBAR}e 伺服器環境變數 FOOBAR 的內容
%f 檔名
%h 遠端主機名稱
%H request 的通訊協定
%{Foobar}i The contents of Foobar: header line(s) in the request sent to the server.
Changes made by other modules (e.g. mod_headers) affect this.
%k 在一個 connection requests handled 中 keepalive 的數量
%l 遠端的 logname (This will return a dash unless mod_ident is present and Identity Check is set On).
%m The request method.
%{Foobar}n The contents of note Foobar from another module.
%{Foobar}o The contents of Foobar: header line(s) in the reply.
%p 伺服器回應一個 request 的 canonical port number
%{format}p The canonical port of the server serving the request or the server's actual port or the client's actual port.
Valid formats are canonical, local, or remote.
%P 回應 request 時的 PID
%{format}P The process ID or thread id of the child that serviced the request. Valid formats are pid, tid, and hextid. hextid requires APR 1.2.0 or higher.
%q The query string (prepended with a ? if a query string exists, otherwise an empty string).
%r First line of request.
%s 狀態. 若是由內部轉址來的 request，則將顯示原始 request 的狀態
%t 伺服器收到 request 的時間 (standard english format)
%{format}t 同上，但以自訂的格式來顯示時間
%T 伺服器回應 request 的時間 (in seconds)
%u 遠端的使用者 (from auth)
%U The URL path requested (not including any query string)
%v 伺服器回應 request 時的 canonical ServerName
%V The server name according to the UseCanonicalName setting.
%X Connection status when response is completed :
　X：connection aborted before the response completed.
　+：connection may be kept alive after the response is sent.
　-：connection will be closed after the response is sent.
This directive was %c in late versions of Apache 1.3, but this conflicted with the historical ssl %{var}c syntax.
%I Bytes received, including request and headers, cannot be zero. You need to enable mod_logio to use this.
%O Bytes sent, including headers, cannot be zero. You need to enable mod_logio to use this.

container - promethus

1. good
https://blog.techbridge.cc/2019/08/26/how-to-use-prometheus-grafana-in-flask-app/

2.  docker
https://github.com/prometheus/prometheus

3.  good example
https://k2r2bai.com/2018/06/10/cncf/prometheus/
https://ithelp.ithome.com.tw/tags/articles/prometheus
https://www.inwinstack.com/2018/11/14/prometheus-introduction-2/

4. log
https://www.robustperception.io/reloading-prometheus-configuration

document:
https://prometheus.io/docs/prometheus/latest/storage/
https://prometheus.io/docs/prometheus/latest/getting_started/

https://prometheus.io/docs/prometheus/latest/querying/basics/

https://wiki.lnd.bz/display/LFTC/Prometheus

https://yunlzheng.gitbook.io/prometheus-book/part-ii-prometheus-jin-jie/exporter/commonly-eporter-usage/use-prometheus-monitor-container

5. reload
http://codefun007.xyz/view/article_detail.htm?id=350

yaml invalidte

https://codebeautify.org/yaml-validator

https://ithelp.ithome.com.tw/articles/10193509

http://www.yamllint.com/