Keisuke Kubota kubosuke

下記のように、set_real_ip_fromにLBやIngressのIPを記載し、real_ip_recursiveを設定することで、remote_addr変数にクライアントのソース元IPを入れることができるようです。

       ##                                                                                                                                                                                          
        # Logging Settings                                                                                                                                                                          
        ##                                                                                                                                                                                          
        real_ip_header X-Forwarded-For;
        set_real_ip_from 130.211.0.0/22;
 set_real_ip_from 35.191.0.0/16;

内容

sec.1 スークヘ

إلى أين سنذهب أولاً؟ Y

سنذهب إلى السوق المركزي

لماذا؟ Y

libraries often used

https://docs.rs/proconio/latest/proconio/
https://doc.rust-lang.org/std/collections/struct.VecDeque.html
https://docs.rs/ordered-float/latest/ordered_float/struct.NotNan.html : float wrapper for Ord etc.

chmin

macro_rules! chmin {

LSM

LSM vs B Tree

LSM Pros

LSMの方がstorage効率が高い。BTree は pageの空き分storageを浪費してしまう。
木を管理する必要が無いため、LSMの方がwriteが早い。

minikube ssh sudo resolvectl dns eth0 8.8.8.8 8.8.4.4
minikube ssh sudo resolvectl dns docker0 8.8.8.8 8.8.4.4
minikube ssh sudo resolvectl dns sit0 8.8.8.8 8.8.4.4

kubernetes/minikube#13497 (comment)

Or edit /etc/resolve.conf directly

sample logs

2023-01-30 00:00:31,344 [xxxxx] INFO  LogService  - 2023-01-30	00:00:31	0.0.0.0	-	0.0.0.0	1025	GET	/data/foo/bar	foobar

awk '{A[$13]++}END{for(i in A)print i,A[i]}' access.log
DELETE 7034
GET 660341

check max limit of fd

Background

Exception in thread "qtp859985937-5877" java.lang.OutOfMemoryError: unable to create native thread: possibly out of memory or process/resource limits reached

	package main

	import(
	"fmt"
	"time"
	)

	func main() {
	var (
	o []Option

	use proconio::input;
	use rand::prelude::*;

	fn main() {
	input! {
	n: usize
	};
	let mut rng = rand::thread_rng();

	let mut cnt = 0.0;


	{
	"editor.fontFamily": "JetBrains Mono",
	"editor.fontSize": 13,
	"editor.fontLigatures": true,
	"editor.letterSpacing": 0.3,
	"editor.smoothScrolling": true,
	"workbench.colorTheme": "GitHub Dark Default",
	"workbench.preferredDarkColorTheme": "GitHub Dark Default",
	"workbench.preferredHighContrastColorTheme": "GitHub Dark Default",