wreulicke wreulicke

Liveness Probe は危険

Kubernetesの livenessProbe は危険な場合があります。明確なユースケースを持っていてその結果を理解するまで使用を避けるのをお勧めします。このポストは、Liveness および Readiness Probeに注目しいくつかの「Do」と「Don't」を説明します。

私の同僚である、Sandorは最近、彼が見た一般的なミスについてツイートしています。

	#!/bin/bash

	sudo yum update
	sudo yum install unbound jq -y
	sudo systemctl enable unbound.service
	sudo sed -i 's/PEERDNS=yes/PEERDNS=no/g' /etc/sysconfig/network-scripts/ifcfg-eth0
	sudo sed -i 's/nameserver .*/nameserver 127.0.0.1/g' /etc/resolv.conf
	sudo systemctl start unbound.service

	cat <<EOF \| sudo tee -a /etc/security/limits.conf

	locals {
	key_name = "saito-load-test"
	user_data = ""
	}


	data "aws_availability_zones" "available" {
	state = "available"
	}

	package config

	import (
	"context"
	"os"
	"path/filepath"
	"strings"

	"github.com/heetch/confita"
	"github.com/heetch/confita/backend"

	To use the bundled libc++ please add the following LDFLAGS:
	LDFLAGS="-L/usr/local/opt/llvm/lib -Wl,-rpath,/usr/local/opt/llvm/lib"

	llvm is keg-only, which means it was not symlinked into /usr/local,
	because macOS already provides this software and installing another version in
	parallel can cause all kinds of trouble.

	If you need to have llvm first in your PATH run:
	echo 'export PATH="/usr/local/opt/llvm/bin:$PATH"' >> ~/.bash_profile

	version: '3.7'
	services:
	myapp:
	image: myapp
	ports:
	- "3001:3001"
	labels:
	com.datadoghq.ad.check_names: '["prometheus"]'
	com.datadoghq.ad.init_configs: '[{}]'
	com.datadoghq.ad.instances: '[{"prometheus_url": "http://%%host%%:3001/actuator/prometheus", "extra_headers": {"Accept": "text/plain"}, "namespace": "local.test","metrics": ["jvm*"]}]'

	module.exports = {
	rules: {
	"no-console-use-mylogger": ["error", { "loggerName": "logger", "logger": "winston" }]
	}
	}

	package com.wreulicke.github.mybatis;

	import org.apache.ibatis.executor.statement.StatementHandler;
	import org.apache.ibatis.mapping.BoundSql;
	import org.apache.ibatis.mapping.MappedStatement;
	import org.apache.ibatis.mapping.SqlCommandType;
	import org.apache.ibatis.plugin.Interceptor;
	import org.apache.ibatis.plugin.Invocation;
	import org.slf4j.MDC;
	import org.springframework.jdbc.core.SqlProvider;

	class PaymentService {

	public void purchase(Product product) {
	// なんかいい感じの処理がある
	log.info("決済が完了しました");
	}

	}