投稿時間:2022-03-30 22:42:46 RSSフィード2022-03-30 22:00 分まとめ(47件)

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AWS	AWS News Blog	New – Cloud NGFW for AWS	https://aws.amazon.com/blogs/aws/new-cloud-ngfw-for-aws/	New Cloud NGFW for AWSIn I wrote about AWS Firewall Manager Central Management for Your Web Application Portfolio and showed you how you could host multiple applications perhaps spanning multiple AWS accounts and regions while maintaining centralized control over your organization s security settings and profile In the same way that Amazon Relational Database Service RDS supports multiple database …	2022-03-30 12:02:56
python	Pythonタグが付けられた新着投稿 - Qiita	WindowsでSeleniumによりChromeブラウザを自動操作してみる（Python）	https://qiita.com/MonaSkoog/items/ab66cd78a8bffa9925d0	めちゃくちゃ丁寧な初学者向け記事もあるのですが、そういったものはPythonのインストール方法といった細分化されきった記事でした。	2022-03-30 21:18:24
js	JavaScriptタグが付けられた新着投稿 - Qiita	[備忘録]いつも通り書いていたのに発生したVue.jsのエラー	https://qiita.com/YutoGIma/items/3de8b3f6677707e2d75c	備忘録いつも通り書いていたのに発生したVuejsのエラー新しいコンポーネント作成時に発生しました。	2022-03-30 21:52:15
海外TECH	Ars Technica	We have our best look yet at mysterious ORCs (odd radio circles) in space	https://arstechnica.com/?p=1844277	observational	2022-03-30 12:24:14
海外TECH	MakeUseOf	7 Online Workout Classes to Keep Seniors Fit and Healthy	https://www.makeuseof.com/online-workouts-for-seniors/	fitness	2022-03-30 12:45:13
海外TECH	MakeUseOf	The New PlayStation Plus Subscriptions: Everything You Need to Know	https://www.makeuseof.com/new-playstation-plus-subscriptions-explained/	service	2022-03-30 12:38:43
海外TECH	DEV Community	Animasyon	https://dev.to/metak47/animasyon-4e16	animasyon	2022-03-30 12:41:52
海外TECH	DEV Community	Taking Your Database Beyond a Single Kubernetes Cluster	https://dev.to/datastax/taking-your-database-beyond-a-single-kubernetes-cluster-59gc	Taking Your Database Beyond a Single Kubernetes ClusterBy Christopher Bradford and Ty MortonGlobal applications need a data layer that is as distributed as the users they serve Apache Cassandra has risen to this challenge handling data needs for the likes of Apple Netflix and Sony Traditionally managing data layers for a distributed application was handled with dedicated teams to manage the deployment and operations of thousands of nodes ーboth on premises and in the cloud To alleviate much of the load felt by DevOps teams we evolved a number of these practices and patterns in Kssandra leveraging the common control plane afforded by Kubernetes Ks There has been a catch though ーrunning a database or indeed any application across multiple regions or Ks clusters is tricky without proper care and planning up front To show you how we did this let s start by looking at a single region Kssandra deployment running on a lone Ks cluster It is made up of six Cassandra nodes spread across three availability zones within that region with two Cassandra nodes in each availability zone In this example we ll use the Google Cloud Platform GCP zone name However our example here could just as easily apply to other clouds or even on prem Here s where we are now Existing deployment of our cloud database The goal is to have two regions each with a Cassandra data center In our cloud managed Ks deployment here this translates to two Ks clusters ーeach with a separate control plane but utilizing a common virtual private cloud VPC network By expanding our Cassandra cluster into multiple data centers we have redundancy in case of a regional outage as well as improved response times and latencies to our client applications given local access to data This is our goal to have two regions each with their own Cassandra data center On the surface it would seem like we could achieve this by simply spinning up another Ks cluster deploying the same Ks YAML Then just add a couple tweaks for Availability Zone names and we can call it done right Ultimately the shape of the resources is very similar and it s all Ks objects So shouldn t this just work Well maybe Depending on your environment this approach might work If you re really lucky you may be a firewall rule away from a fully distributed database deployment Unfortunately it s rarely that simple Even if some of these hurdles are easily cleared there are plenty of other innocuous things that can go wrong and lead to a degraded state Your choice of cloud provider Ks distro command line flag and yes even DNS ーthese can all potentially lead you down a dark and stormy path So let s explore some of the most common issues you might run into so you can avoid them Common hurdles on the race to scaleEven if some of your deployment seems to be working well initially you will likely encounter a hurdle or two as you grow into a multicloud environment upgrade to another Ks version or begin working with different distributions and complimentary tooling When it comes to distributed databases there s a lot more under the hood Understanding what Ks is doing to enable running containers across a fleet of hardware will help you develop advanced solutions ーand ultimately something that fits your exact needs The need for unique IP addresses for your Cassandra nodesOne of the first hurdles you might run into involves basic networking Going back to our first cluster let s take a look at the layers of networking involved In our VPC shown below we have a Classless Inter Domain Routing CIDR range representing the addresses for the Ks worker instances Within the scope of the Ks cluster there is a separate address space where pods operate and containers run A pod is a collection of containers that have shared resources ーsuch as storage networking and process space In some cloud environments these subnets are tied to specific availability zones So you might have a CIDR range for each subnet your Ks workers are launched into You may also have other virtual machines within your VPC but in this example we ll stick with Ks being the only tenant CIDR ranges used by a VPC with a Ks layerIn our example we have x x for the nodes and x x for the Ks level Each of the Ks workers gets a slice of the x x CIDR range for the pods that are running on that individual instance Thinking back to our target structure what happens if both clusters utilize the same or overlapping CIDR address ranges You may remember these error messages when first getting into networking Common error messages when trying to connect two networks Errors don t look like this with Ks You don t have an alert that pops up warning you that your clusters cannot effectively communicate If you have a cluster that has one IP space and then you have another cluster for the same IP space or where they overlap how does each cluster know when a particular packet needs to leave its address space and instead route through the VPC network to the other cluster and then into that cluster s network By default there really is no hint here There are some ways around this but at a high level if you re overlapping you re asking for a bad time The point here is that you need to understand your address space for each cluster and then carefully plan the assignment and usage of those IPs This allows for the Linux kernel where Ks routing happens and the VPC network layer to forward and route packets as appropriate But what if you don t have enough IPs In some cases you can t give every pod its own IP address So in this case you would need to take a step back and determine what services absolutely must have a unique address and what services can be running together in the same address space For example if your database here needs to be able to talk to each and every other pod it probably needs its own unique address But if your application tiers in the East Coast and in the West Coast are just talking to their local data layer they can have their own dedicated Ks clusters with the same address range and avoid conflict Flattening out the network In our reference deployment we dedicated non overlapping ranges in Ks clusters for the layers of infrastructure that MUST be unique and overlapping CIDR ranges where services will not communicate Ultimately what we re doing here is flattening out the network With non overlapping IP ranges we can now move on to routing packets to pods in each cluster In the figure above you can see the West Coast is and the East Coast is with the Ks pods receiving IPs from those ranges The Ks clusters have their own IP space versus and the pods are sliced off just like they were previously How to handle routing between the Cassandra data centersSo we have a bunch of IP addresses and we have uniqueness to those addresses Now how do we handle the routing of this data and the communication and discovery of all of this There s no way for the packets destined for cluster A to know how they need to be routed to cluster B When we attempt to send a packet across cluster boundaries the local Linux networking stack sees that this is not local to this host or any of the hosts within the local Ks cluster It then forwards the packet on to the VPC network From here our cloud provider must have a routing table entry to understand where this packet needs to go In some cases this will just work out of the box The VPC routing table is updated with the pod and service CIDR ranges informing which hosts packets should be routed In other environments including hybrid and on premises this may take the form of advertising the routes via BGP to the networking layer Yahoo Japan has a great article covering this exact deployment method However these options might not always be the best answer depending on what your multi cluster architecture looks like within a single cloud provider Is it hybrid or multi cloud with a combination of on prem with two different cloud providers While you could certainly instrument all that across all those different environments you can count on it requiring a lot of time and upkeep Some solutions to consider Overlay networksAn easier answer is to use overlay networks in which you build out a separate IP address space for your application ーwhich in this case is a Cassandra database Then you would run that on top of the existing Kube network leveraging proxies sidecars and gateways We won t go too far into that in this post but we have some great content on how to connect stateful workloads across Ks clusters that will show you at a high level how to do that So what s next Packets are flowing but now you have some new Ks shenanigans to deal with Assuming that you get the network in place and have all the appropriate routing some connectivity between these clusters exists at least at an IP layer You have IP connectivity pods and Cluster can talk to Pods and Cluster but you now also have some new things to think about Service discoveryWith a Ks network identity is transient Due to cluster events a pod may be rescheduled and receive a new network address In some applications this isn t a problem In others like databases the network address is the identity ーwhich can lead to unexpected behavior Even though IP addresses may change over time our storage and thus the data each pod represents stays persistent We must have a way to maintain a mapping of addresses to applications This is where service discovery enters the fold In most circumstances service discovery is implemented via DNS within Ks Even though a pod s IP address may change it can have a persistent DNS based identity that is updated as cluster events occur This sounds great but when we enter the world of multi cluster we have to ensure that our services are discoverable across cluster boundaries As a pod in Cluster I should be able to get the address for a pod in Cluster DNS stubsOne approach to this conundrum is DNS stubs In this configuration we configure the Ks DNS services to route requests for a specific domain suffix to our remote cluster s With a fully qualified domain name we can then forward the DNS lookup request to the appropriate cluster for resolution and ultimately routing The gotcha here is that each cluster requires a separate DNS suffix set through a kubelet flag which isn t an option in all flavors of Ks Some users work around this by using namespace names as part of the FQDN to configure the stub This works but is a little bit of a hack instead of setting up proper cluster suffixes Managed DNSAnother solution similar to DNS stubs is to use a managed DNS product In the case of GCP there is the Cloud DNS product which handles replicating local DNS entries up to the VPC level for resolution by outside clusters or even virtual machines within the same VPC This option offers a lot of benefits including Removing the overhead of managing the cluster hosted DNS server ーCloud DNS requires no scaling monitoring or managing of DNS instances because it is a hosted Google service Local resolution of DNS queries on each Google Ks Engine GKE node ーSimilar to NodeLocal DNSCache Cloud DNS caches DNS responses locally providing low latency and high scalability DNS resolution Integration with Google Cloud s operations suite ーThis provides for DNS monitoring and logging VPC scope DNS ーProvides for multi cluster multi environment and VPC wide Ks service resolution Replicated managed DNS for multi cluster service discovery Cloud DNS abstracts away a lot of the traditional overhead that you would have The cloud provider is going to manage the scaling the monitoring and security patches and all the other aspects you would expect from a managed offering There are also some added benefits to some of the cloud providers with GKE providing a node local DNS cache which reduces latency by running a DNS cache at a lower level so that you re not waiting on DNS response For the long term a managed service specifically for DNS will work fine if you re only in a single cloud But if you re spanning clusters across multiple cloud providers and your on prem environment managed offerings may only be part of the solution The Cloud Native Computing Foundation CNCF provides a multitude of options and there are tons of open source projects that really have come a long way in helping to alleviate some of these pain points especially in that cross cloud multi cloud or hybrid cloud type of scenario Curious to learn more about or play with Cassandra itself We recommend trying it on the Astra DB free plan for the fastest setup Follow the DataStax Tech Blog for more developer stories Check out our YouTube channel for tutorials and here for DataStax Developers on Twitter for the latest news about our developer community	2022-03-30 12:37:58
海外TECH	DEV Community	Pitch me on the pros and cons of your preferred web app framework	https://dev.to/ben/pitch-me-on-the-pros-and-cons-of-your-preferred-web-app-framework-iam	framework	2022-03-30 12:37:49
海外TECH	DEV Community	Linear Gradient	https://dev.to/metak47/linear-gradient-1m2e	gradient	2022-03-30 12:36:25
海外TECH	DEV Community	Sending Transactions with Web3py	https://dev.to/ghoulkingr/sending-transactions-with-web3py-56p8	Sending Transactions with WebpyThis article aims to guide you through the process of creating transactions in Webpy These are really important especially when your project is dependent on making transactions without supervision The article is here	2022-03-30 12:34:47
海外TECH	DEV Community	Re-Syndicate Hashnode to DEV the Easy Way	https://dev.to/sieis/re-syndicate-hashnode-to-dev-the-easy-way-11j3	Re Syndicate Hashnode to DEV the Easy Way GitHub Actions Still Cool But Last week I wrote up an article about auto posting from Hashnode to DEV by using GitHub Actions This was a great way to learn how to set up an Action fiddle with the DEV API and spend a great deal of time figuring out something that I could have done faster by literally copying and pasting the articles markdown I don t regret it because it was a good learning experience But I do want you to know the better way Use RSSJust use the RSS feed of your Hashnode blog You can just add rss xml to your blog s main page like this to find it DEV will let you import an RSS feed to re syndicate Go to Settings gt Extensions and then scroll down to the Publishing to DEV Community from RSS section Notice that there are two optional checkboxes One for canonical tags which I checked because I m keeping Hashnode as my main canonical url for my blog And the other for self referential links This is for when I link to something else I wrote like this article about Sacred Geometry The link will take me to the DEV article when on DEV instead of to Hashnode I don t want that to happen because I want Hashnode to be my main so I unchecked that box hashnode is my main Thanks Andy During the course of last week s investigative journalism and guinea pig like commitment to the cause of setting up my own blog to auto backup to GitHub still a good idea and auto post to DEV I hit DEV s API rate limit A reply from support suggested graciously yet simply that I try importing via RSS if I was going to do more than one import at a time This is by far the better way to accomplish the re posting Yay Publish on DEVAnd just like that we have success DEV will pull all the articles over as Drafts immediately It even properly saw the three I d already brought over and did not duplicate them And this has the added bonus of properly including the original published date in the front matter which my previous method did not unless you added that manually In order to publish on DEV you ll need to change the value of published to true in the front matter of the post Of note the DEV publication date will not be the original publication date Found Issues EmbedsHashnode and DEV have different syntax for embedding things like YouTube videos and GIFs in the posts so you ll want to take note of that and address accordingly Here s Hashnode s Markdown Guide Here s DEV s Editing Guide Code BlocksAlso I noticed a weird quirk in code blocks imported via RSS In Hashnode on the left below I ve declared the language of the code block but in the DEV RSS import on the right that s missing In order for the code blocks to be pretty and color coded the way we like them that has to be manually added to each block Cover ImagesThe cover image doesn t come over either For some reason you can t simply upload it to DEV If there s a way to do this please let me know Instead you ll need to add a cover img value pointing to your image in the front matter You can open the cover image in a new tab from Hashnode to grab the url and plug it in Img in new tab copy url add to DEV front matter No the upload image section in the screenshot above is not for the cover image That s just DEV s regular place where you can upload an image for the markdown text and it ll give you the markdown to paste Thanks amp Please Share Do you cross post content How do you reduce the amount of repeat copy paste type work Did you find this helpful Please let me know below in the comments and re share on Twitter or your preferred platform I m growing my developer content portfolio and am grateful for any additional exposure You can find me on Twitter I d love to say hey Have a great one	2022-03-30 12:32:27
海外TECH	DEV Community	DevDum! Code Smarter. Not Harder.	https://dev.to/rdevans87/devdum-code-smarter-not-harder-2b54	DevDum Code Smarter Not Harder Learning to code takes time a lot of time I m talking hours and hours in front of a computer researching languages libraries frameworks theories methods principles packages back end front end functions arrays loops variables elements classes objects algorithms amp abbreviations html css js json dom api mvc mvp oop orm pwa sql npm git cli…and the list goes on If you re like me then you don t have all the time in the world to devote to web development The good news is you don t have to be an expert engineer to build a solid website or application anymore just expect to spend a few late nights banging your head against the keyboard Part of being a good developer is just knowing where to look and having the right resources at your fingertips to help you packages components widgets wizards addons extensions optimizers plugins scrapers converters generators templates boilerplates repositories you get the idea Do your best to learn the fundamentals and understand the key principles but don t worry about being the smartest developer in the room The dev community runs deep and there is a lot to explore The best way to learn web development is by doing DevDum will save you countless hours searching the web so you can focus on developing whatever crazy idea you ve got in your head Just remember the DevDum rule of thumb Code Smarter Not Harder Be sure to take advantage of all the free amp open source tools available on the internet code snippets cheat sheets static websites even fully developed applications ready to deploy You ll be surprised what you can find and what s already been built for you to use DevDum contains all the resources needed for developing a fullstack web application Hopefully it saves you some of the headache along the way Less searching more learning with resources for web developers it s a no brainer Visit the DevDum website and give the repo a on Github if you find the resources useful Special thanks to all the developers engineers programmers techies awesome listers open sourcers and product hunters out there Have any resources you d like to share Post them in the comments below Happy coding	2022-03-30 12:28:40
海外TECH	DEV Community	AWS Cloud Development Kit CDK for IaaS	https://dev.to/tkssharma/aws-cloud-development-kit-cdk-for-iaas-3c01	AWS Cloud Development Kit CDK for IaaSOriginally Published at AWS CDK is an open source framework for creating and managing AWS resources By using languages familiar to the developer such as TypeScript or Python the Infrastructure as Code is described In doing so CDK synthesizes the code into AWS Cloudformation Templates and can optionally deploy them right away Developers use the CDK framework in one of the supported programming languages to define reusable cloud components called constructs which are composed together into stacks forming a CDK app At a glanceInstall or update the AWS CDK CLI from npm requires Node js ≥ We recommend using a version in Active LTS npm i g aws cdk See Manual Installation for installing the CDK from a signed zip file Initialize a project mkdir hello cdk cd hello cdk cdk init sample app language typescriptThis creates a sample project looking like this export class HelloCdkStack extends cdk Stack constructor scope cdk App id string props cdk StackProps super scope id props const queue new sqs Queue this HelloCdkQueue visibilityTimeout cdk Duration seconds const topic new sns Topic this HelloCdkTopic topic addSubscription new subs SqsSubscription queue Deploy this to your account cdk deploy Lets play with AWS CDKso what all we need is all these things belowAWS CLI install Package AWS Account and User AWS IAM Node js install using NVM IDE for your programming language vscode AWS CDK ToolkitLittle bit Typescript knowledge cdk initCreate project directoryCreate an empty directory on your system mkdir qa amp amp cd qacdk initWe will use cdk init to create a new TypeScript CDK project cdk init sample app language typescriptOutput should look like this you can safely ignore warnings about initialization of a git repository this probably means you don t have git installed which is fine for this workshop Applying project template app for typescriptInitializing a new git repository Executing npm install npm notice created a lockfile as package lock json You should commit this file npm WARN tst No repository field npm WARN tst No license field ➜nvm install v Downloading and installing node v Downloading Computing checksum with shasum a Checksums matched Now using node v npm v ➜nvm use v Now using node v npm v ➜npm install g aws cdk added packages and audited packages in s➜cd➜mkdir QA➜cd QA➜QA cdk init sample app language typescriptApplying project template sample app for typescript Welcome to your CDK TypeScript projectYou should explore the contents of this project It demonstrates a CDK app with an instance of a stack QaStack which contains an Amazon SQS queue that is subscribed to an Amazon SNS topic The cdk json file tells the CDK Toolkit how to execute your app Useful commandsnpm run build compile typescript to jsnpm run watch watch for changes and compilenpm run test perform the jest unit testscdk deploy deploy this stack to your default AWS account regioncdk diff compare deployed stack with current statecdk synth emits the synthesized CloudFormation templateInitializing a new git repository Lets Check the codeimport Duration Stack StackProps from aws cdk lib import as sns from aws cdk lib aws sns import as subs from aws cdk lib aws sns subscriptions import as sqs from aws cdk lib aws sqs import Construct from constructs export class QaStack extends Stack constructor scope Construct id string props StackProps super scope id props const queue new sqs Queue this QaQueue visibilityTimeout Duration seconds const topic new sns Topic this QaTopic topic addSubscription new subs SqsSubscription queue lib qa stack ts is where your CDK application s main stack is defined This is the file we ll be spending most of our time in bin qa ts is the entrypoint of the CDK application It will load the stack defined in lib qa stack ts package json is your npm module manifest It includes information like the name of your app version dependencies and build scripts like “watch and “build package lock json is maintained by npm cdk json tells the toolkit how to run your app In our case it will be npx ts node bin qa ts tsconfig json your project s typescript configuration gitignore and npmignore tell git and npm which files to include exclude from source control and when publishing this module to the package manager node modules is maintained by npm and includes all your project s dependencies Your app s entry pointLet s have a quick look at bin qa ts usr bin env nodeimport as cdk from aws cdk lib import CdkQAStack from lib qa stack const app new cdk App new CdkWorkshopStack app CdkQAStack This code loads and instantiates the CdkWorkshopStack class from the lib qa stack ts file We won t need to look at this file anymore The main stackOpen up lib qa stack ts This is where the meat of our application is import as cdk from aws cdk lib import as sns from aws cdk lib aws sns import as subs from aws cdk lib aws sns subscriptions import as sqs from aws cdk lib aws sqs export class CdkQAStack extends cdk Stack constructor scope cdk App id string props cdk StackProps super scope id props const queue new sqs Queue this CdkWorkshopQueue visibilityTimeout cdk Duration seconds const topic new sns Topic this CdkWorkshopTopic topic addSubscription new subs SqsSubscription queue As you can see our app was created with a sample CDK stack CdkWorkshopStack The stack includes SQS Queue new sqs Queue SNS Topic new sns Topic Subscribes the queue to receive any messages published to the topic topic addSubscription Synthesize a template from your appThe CDK CLI requires you to be in the same directory as your cdk json file If you have changed directories in your terminal please navigate back now cdk synthWill output the following CloudFormation template Resources CdkWorkshopQueueDD Type AWS SQS Queue Properties VisibilityTimeout Metadata aws cdk path CdkWorkshopStack CdkWorkshopQueue Resource CdkWorkshopQueuePolicyAFA Type AWS SQS QueuePolicy Properties PolicyDocument Statement Action sqs SendMessage Condition ArnEquals aws SourceArn Ref CdkWorkshopTopicDAF Effect Allow Principal Service sns amazonaws com Resource Fn GetAtt CdkWorkshopQueueDD Arn Version Queues Ref CdkWorkshopQueueDD Metadata Bootstrapping an environmentThe first time you deploy an AWS CDK app into an environment account region you can install a “bootstrap stack This stack includes resources that are used in the toolkit s operation For example the stack includes an S bucket that is used to store templates and assets during the deployment process You can use the cdk bootstrap command to install the bootstrap stack into an environment cdk bootstrap Now Lets Deploycdk deployYou should see a warning like the following This deployment will make potentially sensitive changes according to your current security approval level require approval broadening Please confirm you intend to make the following modifications IAM Statement Changes NOTE There may be security related changes not in this list See Do you wish to deploy these changes y n YCdkWorkshopStack deploying CdkWorkshopStack creating CloudFormation changeset CdkWorkshopStackStack ARN arn aws cloudformation REGION ACCOUNT ID stack CdkWorkshopStack STACK IDThe CloudFormation ConsoleCDK apps are deployed through AWS CloudFormation Each CDK stack maps with CloudFormation stack This means that you can use the AWS CloudFormation console in order to manage your stacks Let s take a look at the AWS CloudFormation console Just go to AWS cloudfromation and check console cleanup on AWS resourcesOpen lib QA stack ts and clean it up Eventually it should look like this import as cdk from aws cdk lib export class CdkWorkshopStack extends cdk Stack constructor scope cdk App id string props cdk StackProps super scope id props nothing here cdk diffNow that we modified our stack s contents we can ask the toolkit to show us the difference between our CDK app and what s currently deployed This is a safe way to check what will happen once we run cdk deploy and is always good practice and now wecan trigger cdk deploy AWS SQS Queue CdkWorkshopQueueDD destroy AWS SQS QueuePolicy CdkWorkshopQueuePolicyAFA destroy AWS SNS Topic CdkWorkshopTopicDAF destroy AWS SNS Subscription CdkWorkshopTopicCdkWorkshopQueueSubscriptionDC destroyConclusion This Blog was about getting started Now we should be able to deploy any application from our vscode simple editor using AWS SDK we just need AWS Profile with User account and aws cdk installed on system In coming section i will cover some more advance examples using AWS CDK References	2022-03-30 12:25:25
海外TECH	DEV Community	Pipy proxy helps improve SpringBoot REST Service QPS & Latency	https://dev.to/flomesh/pipy-proxy-helps-improve-springboot-rest-service-qps-latency-3o48	Pipy proxy helps improve SpringBoot REST Service QPS amp LatencySpring and SpringBoot development platforms are one of the most popular development platform among Java developers We performed a simple benchmark of SpringBoot starter application running with default configurations with and without a sidecar Pipy proxy and measured QPS and Latency indicators Our results shows that deploying Pipy proxy as sidecar improved QPS and reduced latency by almost in our testing environment Test Results OSToolModeQPSLatency PPPPubuntuabspringbootubuntuabpipy gt springbootubuntuwrkspringbootmsmsmsubuntuwrkpipy gt springbootmsmsmsubuntufortiospringbootubuntufortiopipy gt springbootFrom the test results we observed Accessing Springboot service via Pipy proxy results in higher QPS and lower latency as compared to directly accessing the SpringBoot service For detailed test reports along with benchmark procedure software used load testing tools and scripts used refer to Pipy wiki link below BENCHMARK Pipy as proxy for SpringBoot REST service	2022-03-30 12:25:06
海外TECH	DEV Community	Input lag, what's going on?	https://dev.to/goals/input-lag-whats-going-on-1ka8	Input lag what x s going on Input lag input latency bad servers and low tick rate are some of the phrases used to describe unresponsive gameplay Let s break it down into smaller parts and talk about where and why this happens and what we can do to improve the experience At GOALS we want to create the best player experience possible and we know there are no shortcuts to achieving that GOALS should feel good and responsive to play there shouldn t be any delay when you press a button To make this happen we re going to build tools that help us measure the delay early on in the development process The tests in this article were performed with an Unreal Engine empty project with a dedicated server and one client on a single machine These values might not be accurate but they will give you some information about where the latency happens The client was running at fps and the server was set to a tick rate of The client FPS and server tick rate for these tests were selected to make it easier to measure and present for the reader HardwareThe hardware you use can be a factor for the perceived input lag We have a controller mouse or keyboard connected through Bluetooth USB or Wi Fi All of these devices have a small delay and it varies between the specific device polling rate and connection type Both Xbox and PlayStation controllers have a small delay but they have a different default polling rate which could cause a bigger variety in the delays The polling rate of a device is the number of times the operating system driver will ask for changes For example an Xbox controller has a default polling rate of times per second and a Playstation controller of times per second This means that the Xbox controller has a max delay of ms and the Playstation controller ms The delay to render a frame on your Monitor or TV can vary between ms and ms For a new gaming monitor the delay is very low usually between ms and for older monitors it can be around ms TVs are different they have a bigger screen and are not optimized for fast rendering The delay can vary between ms and up to ms Some new TVs are GSync compatible and have a gaming mode setting where some of the filters are disabled to reduce the delay in rendering The refresh rate on monitors and TVs differs as well Monitors have a refresh rate between and hz while TVs are between and hz The refresh rate is how often a frame will be drawn on the screen higher values will make motions appear more smooth and responsive Client frame rate tableFrame rateTime per frameComment msOlder TVs and consoles msMost common refresh rate ms ms ms The server tick rateLet s take a closer look at how game servers specifically how tick rate works and how it affects the responsiveness Tick rate is the number of times a server will process input update the game state and send updates back to the clients per second A server at tick rate will process input every ms and for a server set to tick rate it s every ms A higher tick rate on the server will decrease the time it takes to process the input from the client and update the game logic This comes at the cost of more processing power and network traffic since more data has to be synchronized and processed In a game where the game state is big and there are a lot of changes the server might not be able to process the entire state more than times per second tick rate while in a game where the state is really small it might be able to process the game state at times per second without any problem The tick rate will affect the input latency between and tick rate seconds depending on when the input package arrives at the server Internet and networked communicationMultiplayer games over the internet will always have a varied latency and this is due to the connection type the number of routes between the client and the server as well as the amount of traffic on that physical line The Internet is very unreliable and can cause packages to arrive in the wrong order or get lost on the way When a package is lost the client server has to decide if it should request a resend or just discard it This is usually done upfront in the game engine marking some packages as reliable or unreliable Reliable packages require the server client to respond with an ack acknowledgment when the package has arrived while the unreliable version is just fire and forget and ignores lost packages Input should always be sent as a reliable package since that data should never be lost while position updates can be sent as unreliable Resending an old position of a player in the game might be a waste because by the time it reaches the destination the data is old this varies between different types of games When packages are lost some kind of delay will happen in some cases the game might appear frozen and in other cases you might experience that your character did not react to your input fast enough Rendering and synchronizationThere are a handful of settings that can change how a frame is rendered on the screen to increase performance reduce the latency avoid screen tearing etc Here s a brief overview of how they affect performance and the perceived input lag A frame can be rendered to the back buffer the buffer that the display reads either by writing directly to the buffer writing to a temporary buffer and copying the buffer when it s ready or to several buffers and just swapping the source The two latter ones are called double and triple buffering Both of these will increase the performance of the game since it doesn t write directly to the back buffer but it will also introduce a small latency see references for in depth information about this Screen tearing is something that happens when the monitor s refresh rate doesn t match the frame rate in the game VSYNC is a way to solve this by keeping the frame rate writing to the back buffer in sync with the monitor s refresh rate This will give the player a very smooth experience with no screen tearing but it will introduce a small latency on the input since each frame has to wait until the monitor is ready to render it GSync Freesync is a new monitor technology that lets the GPU control how often the monitor should render instead of the other way around This eliminates both the input lag and the screen tearing and will give the best possible experience The downside is that it requires special hardware both the GPU and the monitor must support either GSync Nvidia or Freesync AMD The tests in Unreal EngineWe ve built some simple tools to track the latency from a button press until the server responds with the updates The blue bar is the Client and that s how long it takes for Unreal Engine to register a button click In Unreal Engine the input is tied to the frame rate a high frame rate will poll the input more often lower frame rate will increase the latency The red bar is the communication to the server where it will package the data send the package unpack the data and run the method on the server The yellow bar is the time it took for the response to come back to the client If we break these down into smaller parts and compare them to what we ve learned so far The client is running at fps which means that the input will be polled every ms which would give us an average input delay of ms This can be seen in the graph above The server tick rate is set to and each input will be read every ms average at ms this is the red bar in the graph The server sends the response back to the client and the client reads that response every ms fps this is the yellow part The worst case in this scenario is ms between a button click and the code gets run on the client and the best is below ms In the graph below we can see a comparison of how long it takes before a button release event happens this is a normal click with the thumb on a PS controller This means that if the game reacts on button up instead of button down you ll have a ms delay before the input has even been read and processed by the game loop To reduce the input delay you should do the action on button down events this might not be possible in some cases though For example in games where you have a double tap or a press hold the game code has to wait for a certain amount of time before it can decide which action you re doing If you use the same button for a single tap you ll still have to wait that amount of time before it knows which action you are performing SummaryWe ve talked about the hardware the software and the internet There are a lot of steps between pressing a button until something happens on the screen In the table below you can see all the steps that happen when you press a button in the test we did When everything is perfect most of these steps will be very close to and in the worst case it will add up to a high number based on the frame rate tick rate internet latency input device and rendering settings The rendering and display times were not measured by us these numbers are from tests that can be found in the references section Source    Possible Latency  CommentInput device controller keyboard mouse msThe delay in the physical device the drivers and the Operating System Game loop Read input fps ms fps ms fps msThe frame rate that the game is running at if the engine polls the input once each frame Send input to server msPackaging Serializing the data on the client Internet Network gt msThis is the time it takes for a package to reach the server This is not RTT or Ping This can vary a lot depending on your location and your ISP Process input on the server ticks ms ticks ms ticks msThe package will be processed every tick on the server so depending on when it arrives the delay will vary Send response to client msPackage Serializing the data on the server Internet Network gt msTime for a package to reach the client Process message on client fps ms fps ms fps msIn most game engines the network packages will be processed at the start of the game loop and systems can look at the values in their tick update function Render msDepending on the rendering technique used this can vary between and a couple of milliseconds It also depends on when in the game loop graphics are processed Display on monitor TV msThe time it takes for the monitor to show what the GPU has in the back buffer There are some things we didn t mention in this article and that are issues that happen on the server for example a short “freeze on the server that causes the processing time to take longer than it should disconnects or dropped packages due to overflow of input etc What can you do There are a few things you can do to reduce the perceived input latency Do some testing with VSync and enable disable double triple buffering If your device supports a higher polling rate you can probably find something in the manual or some online forum on how to increase it If you ve got an older Monitor or TV and are considering an upgrade look for something that is made for gaming GSync Freesync GSync compatible monitors and TVs will make the game look and feel better make sure your Graphics card supports it What will GOALS do Some of these things that we ve talked about are not something that GOALS can do anything about but there are some parts where we ll do our best to improve the responsiveness of the game The performance on the client and the server is one part that affects the input latency and it s something we can work with We ll add a lot of telemetry points early in the development of the game so we can track the impact of every change and feature we add This will give us a better understanding of which parts can be further optimized to achieve a higher frame rate There are a lot of different techniques that can be used to improve the perceived latency by predicting the move that the player does like starting an animation when the button is pressed instead of waiting for the server to approve it The downside is when the client and server disagree on something and you ll experience a small rubber band effect We re going to spend a lot of time testing out different solutions to this problem so that we can give the player a great experience even when the network condition isn t optimal We ll keep you updated with our progress and share details about how we re measuring the performance and responsiveness Links and ReferencesMonitor TVs Monitors Input lag for controllersRendering	2022-03-30 12:24:40
海外TECH	DEV Community	Credit Card Purchasing Analysis [ML]	https://dev.to/akhan/credit-card-purchasing-analysis-ml-421o	Credit Card Purchasing Analysis ML Introduction We are going to analyze the credit data and for what purpose people use it for using German credit card data published by UCL The data set contains the following fields Age numeric Sex text male female Job numeric unskilled and non resident unskilled and resident skilled highly skilled Housing text own rent or free Saving accounts text little moderate quite rich rich Checking account numeric in DM Deutsch Mark Credit amount numeric in DM Duration numeric in month Purpose text car furniture equipment radio TV domestic appliances repairs education business vacation others This problem could be subjected to multi class analysis but we are going to try it as a clustering problem Why as a clustering problem you say Because lets say we have to normalize the data in term of what would be the better approach to divide underlying customers in groups Marketing segmentation relies heavily on segmenting their customers to get a better understanding of a group As in this database there are many columns that describes a behavior of a user in terms of what is his gender how much credits a person has used how much money he has in his savings account etc We are more interested in how to draw a boundary to grip the problem and deduce results based on groups Why groups So that we can understand better in terms of what is the general trend of buying in these groups Lets say you introduce a new user to the record with a help of a little bit of history with the system you would be able to pitch a better loan scheme to a customer in a group The Data set looks like this upon show command Lets check the minimum maximum average “Age of the user s in the data set Lets check the minimum maximum average Credit Amount Spent of the user s in the data set Lets start the most trivial categorization used in market segmentation i e segmentation done using gender to see if that works To start with lets check the average amount of credits spent by gender We can see a little bit of difference in average credit spent Lets check the trends in buying and total credit spent on each category for both genders We got two type of differentiation First one is the total credits spent on each category and the second one is the top nd and rd category is different for both First offset is maybe due to difference in average credit spent as scene above but the second differentiation is based on what is the buying trend using credit amount For Females the nd most favorite is “furniture equipment category and for males it is “radio TV We got a differentiation but its not much to base all of the recommendations for loans etc Lets start Clustering We used Apache Spark as the framework and Kmeans for clustering the data Since we have so many categorical variables like Housing Saving accounts etc we had to first index these string columns to numeric classes using Spark s “StringIndexer and then transform into feature vectors These feature vectors were then fed to the Kmeans algorithm The Kmeans algorithm was trained for k up to k The error scores for each iteration are given belowWe selected k as it drops the error rate significantly and next iterations doesn t really provides much reduction in the error The results for k are Lets visualize and find trends in Group and We got three advantages by introducing clustering The groups have successfully eliminated the average credit amount spend differentiation Now each group has different representation of trends in credit amount spend But here s the catch I looked up the total users spending on a category in each group what I found out was there was a group far significant in number but dominating all three categories in terms of credit spent on “cars So lets explore it by average credits spent on each category for each group Voila not only each group spent differently on each category on average we can distinguish by this demarcation about whats the most aggressively bought item for each category…………	2022-03-30 12:23:32
海外TECH	DEV Community	Saving users’ preferences in SvelteKit	https://dev.to/pilcrowonpaper/saving-users-preferences-in-sveltekit-3b37	Saving users preferences in SvelteKitThis is a quick tutorial on saving users preferences in SvelteKit There are ways one might approach this First is implementing an auth system But that might be overkill so another way is to save it locally Let s go with that So something like this I ll be using this package to simplify the code let name stringconst saveName gt Cookie set name name lt input bind value name gt lt button on click saveName gt save lt button gt Well that was easy But a small problem arises when we want to display it onMount gt name Cookie get name lt p gt name lt p gt This works but since we have to wait for document to load we need to use onMount That means there will be a split second after the page loads where name undefined This won t be a big problem in this case but if it were saving user s light dark theme preference it ll lead to a quite negative UX This will also happen if we rely on something like Firebase auth since it also has a dependency on window document To solve this we can read the cookie in the server before the page fully loads First let s read the cookie with hooks This handle function runs every time SvelteKit receives a request We ll use the cookie package to make cookie parsing easier import as cookie from cookie export const handle Handle async event resolve gt const name cookie parse event request headers get cookie as Partial lt name string gt if name event locals name return await resolve event Next we have to send this to the frontend One way of doing it is to use the session getsession object which can be read in the load function We can set the session object using getSession Since event first passed the handle function it includes name in locals export const getSession GetSession async event gt const name event locals as Partial lt name string gt if name return return name Finally we can get the session object in the load function like below export const load Load async session gt const name session as Partial lt name string gt return props name Here s a simple project of mine that implements this URL Github	2022-03-30 12:19:00
Apple	AppleInsider - Frontpage News	Apple announces $50 million education initiative for supply chain workers	https://appleinsider.com/articles/22/03/30/apple-announces-50-million-education-initiative-for-supply-chain-workers?utm_medium=rss	Apple announces million education initiative for supply chain workersApple is launching a Supplier Employee Development Fund in partnership with labor and education organizations spending million to empower suppliers employees through training The new project is being made in collaboration with the International Labor Organization the International Organization for Migration plus what Apple describes as new and expanded partnerships with other groups Those include universities non profit organizations and leading rights advocates We put people first in everything that we do said Sarah Chandler Apple s senior director of Environment and Supply Chain Innovation in a statement and we re proud to announce a new commitment to accelerate our progress and provide even more opportunities for people across our supply chain Read more	2022-03-30 12:27:12
Apple	AppleInsider - Frontpage News	Craig Federighi answers complaint about why iOS auto-update doesn't work	https://appleinsider.com/articles/22/03/30/craig-federighi-answers-complaint-about-why-ios-auto-update-doesnt-working?utm_medium=rss	Craig Federighi answers complaint about why iOS auto update doesn x t workApple s Craig Federighi has outlined how the company handles rolling out of automatic updates to iOS including why it can take weeks to work Reddit user Mateusz Buda reports emailing Apple s senior vice president of software engineering Craig Federighi He was asked about iOS auto updates since Buda s iPhone had not updated itself two weeks after the release of iOS We incrementally rollout new iOS updates replied Federighi by first making them available for those that explicitly seek them out in Settings and then weeks later after we ve received feedback on the update ramp up to rolling out to devices with auto update enabled Hope that helps Read more	2022-03-30 12:06:46
海外TECH	Engadget	After 355 days aboard the ISS, astronaut Mark Vande Hei returns to Earth a changed man	https://www.engadget.com/iss-astronaut-mark-vande-hei-returns-to-earth-123056973.html?src=rss	After days aboard the ISS astronaut Mark Vande Hei returns to Earth a changed manAfter days aboard the ISS NASA astronaut and five time flight engineer Mark T Vande Hei returns to Earth as record holder for the longest single spaceflight in NASA history having surpassed Commander Scott Kelly s day mark set in Though not as long as Peggy Whitson s cumulative days spent in microgravity Vande Hei s accomplishment is still one of the longest single stints in human spaceflight just behind Russia s Valeri Polyakov who was aboard the Mir for straight days that s more than months back in the mid s Though NASA s Human Research Program has spent years studying the effects that microgravity and the rigors of spaceflight have on the human body the full impact of long duration space travel has yet to be exhaustively researched As humanity s expansion into space accelerates in the coming decades more people will be going into orbit ーand much farther ーboth more regularly and for longer than anyone has in the past half century and they ll invariably need medical care while they re out there To fill that need academic institutes like the Center for Space Medicine at the Baylor College of Medicine in Houston TX have begun training a new generation of medical practitioners with the skills necessary to keep tomorrow s commercial astronauts alive on the job Even traveling the relatively short mile distance to the International Space Station does a number on the human body The sustained force generated during liftoff can hit gs though “the most important factors in determining the effects the sustained acceleration will have on the human body is the rate of onset and the peak sustained g force Dr Eric Jackson wrote in his dissertation An Investigation of the Effects of Sustained G Forces on the Human Body During Suborbital Spaceflight “The rate of onset or how fast the body accelerates dictates the ability to remain conscious with a faster rate of onset leading to a lower g force threshold Untrained civilians will begin feeling these effects at to gs but with practice seasoned astronauts using support equipment like high g suits can resist the effects until around or gs however the unprotected human body can only withstand about gs of persistent force before blacking out Once the primary and secondary rocket stages have been expended the pleasantness of the spaceflight will improve immensely albeit temporarily As NASA veteran with cumulative days in space Leroy Chiao told Space in as soon as the main engines cut out the crushing Gs subside and “you are instantly weightless It feels as if you suddenly did a forward roll on a gym mat as your brain struggles to understand the odd signals coming from your balance system “Dizziness is the result and this can again cause some nausea he continued “You also feel immediate pressure in your head as if you were lying down head first on an incline At this point because gravity is no longer pulling fluid into your lower extremities it rises into your torso Over the next few days your body will eliminate about two liters of water to compensate and your brain learns to ignore your balance system Your body equilibrates with the environment over the next several weeks Roughly half of people who have traveled into orbit to date have experienced this phenomenon which has been dubbed Space Adaptation Syndrome SAS though as Chiao noted the status debuffs do lessen as the astronaut s vestibular system readjusts to their weightless environment And even as the astronaut adapts to function in their new microgravity surroundings their body is undergoing fundamental changes that will not abate at least until they head back down the gravity well “After a long duration flight of six or more months the symptoms are somewhat more intense Chiao said “If you ve been on a short flight you feel better after a day or two But after a long flight it usually takes a week or several before you feel like you re back to normal “Spaceflight is draining because you ve taken away a lot of the physical stimulus the body would have on an everyday basis Dr Jennifer Fogarty from Baylor s Center for Space Medicine told Engadget “Cells can convert mechanical inputs into biochemical signals initiating downstream signaling cascades in a process known as mechanotransduction researchers from the University of Siena noted in their study The Effect of Space Travel on Bone Metabolism “Therefore any changes in mechanical loading for example those associated with microgravity can consequently influence cell functionality and tissue homeostasis leading to altered physiological conditions Without those sensory inputs and environmental stressors that would normally prompt the body to maintain its current level of fitness our muscles will atrophy ーup to percent of their mass depending on the length for the mission ーwhile our bones can lose their mineral density at a rate of to percent every month quot Your bones are being continually eaten away and replenished quot pioneering Canadian astronaut Bjarni Tryggvason told CBC in quot The replenishment depends on the actual stresses in your bones and it s mainly bones in your legs where the stresses are all of a sudden reduced in space that you see the major bone loss This leaves astronauts highly susceptible to breaks as well as kidney stones upon their return to Earth and generally require two months of recovery for every month spent in microgravity In fact a study found that the bone loss from six months in space “parallels that experienced by elderly men and women over a decade of aging on Earth Even intensive daily sessions with the treadmill cycle ergometer and ARED Advanced Resistance Exercise Device aboard the ISS paired with a balanced nutrient rich diet has only shown to be partially effective at offsetting the incurred mineral losses And then there s the space anemia According to a study published in the journal Nature Medicine the bodies of astronauts appear to destroy their red blood cells faster while in space than they would here on Earth quot Space anemia has consistently been reported when astronauts returned to Earth since the first space missions but we didn t know why quot study author Guy Trudel said in a January statement “Our study shows that upon arriving in space more red blood cells are destroyed and this continues for the entire duration of the astronaut s mission This is not a short term adaptation as previously believed the study found The human body on Earth will produce and destroy around million red blood cells every second However that number jumps to roughly million per second while in space a percent increase that researchers attribute to fluid shifts in the body as it adapts to weightlessness Recent research also suggests that our brains are actively “rewiring themselves in order to adapt to microgravity A study published in Frontiers in Neural Circuits investigated structural changes found in white matter which interfaces the brain s two hemispheres after space travel using MRI data collected from a dozen Cosmonauts before and after their stays aboard the ISS for about days apiece Researchers discovered changes in the neural connections between different motor areas within the brain as well as changes to the shape of the corpus callosum the part of the brain that connects and interfaces the two hemispheres again due to fluid shifts quot These findings give us additional pieces of the entire puzzle quot study author Floris Wuyts of Floris Wuyts University of Antwerp told Space quot Since this research is so pioneering we don t know how the whole puzzle will look yet These results contribute to our overall understanding of what s going on in the brains of space travelers quot As the transition towards commercial space flight accelerates and the orbital economy further opens for business opportunities to advance space medicine increase as well Fogarty points out that government space flight programs and installations are severely limited in the number of astronauts they can handle simultaneously ーthe ISS holds a whopping seven people at a time ーwhich translates into multi year long queues for astronauts waiting to go into space Commercial ventures like Orbital Reef will shorten those waits by expanding the number of space based positions available which will give institutions like the Center for Space Medicine more and more diversified health data to analyze “The diversity of the types of people that are capable and willing to go into space for work really opens up this aperture on understanding humanity Fogarty said “versus the existing select population that we always struggle to match to or interpret data from Even returning from space is fraught with physiological peril Dr Fogarty points out that while in space the gyroscopic organs in the inner ear will adapt to the new environment which is what helps alleviate the symptoms of SAS However that adaptation works against the astronaut when they return to full gravity ーespecially the chaotic forces present during reentry ーthey can be shocked by the sudden return of amplified sensory information It s roughly equivalent she describes to continuing to turn up the volume on a stereo with a wonky input port You hear nothing as you rotate the knob right up until the moment the input s plug wiggles just enough to connect and you blow your eardrums out because you d dialed up the volume to without realizing it “Your brain has acclimated to an environment and very quickly Fogarty said “But the organ systems in your ear haven t caught up to the new environment These effects like SAS are temporary and do not appear to limit the amount of times an astronaut can venture up to orbit and return “There s really no evidence to say that we would know there would be a limit she said envisioning it could end up being more of a personal choice in deciding if the after effects and recovery times are worth it for your next trip to space	2022-03-30 12:30:56
海外科学	NYT > Science	U.S. and Russian Astronauts Land on Earth Together Amid War in Ukraine	https://www.nytimes.com/2022/03/30/science/nasa-us-russia-mark-vande-hei.html	U S and Russian Astronauts Land on Earth Together Amid War in UkraineMark Vande Hei and two Russian counterparts returned from the International Space Station where cooperation between NASA and Russia s space agency continues despite the invasion of Ukraine	2022-03-30 12:20:20
海外科学	NYT > Science	A NASA astronaut will soon land on Earth in a Russian spacecraft. Here’s how to watch.	https://www.nytimes.com/2022/03/29/science/nasa-russia-mark-vande-hei.html	A NASA astronaut will soon land on Earth in a Russian spacecraft Here s how to watch Although the U S and Russia have halted cooperation in many areas over the invasion of Ukraine they ve continued to work together aboard the International Space Station	2022-03-30 12:10:14
海外ニュース	Japan Times latest articles	Japan looks to spend ¥1 trillion on fresh stimulus amid price surge	https://www.japantimes.co.jp/news/2022/03/30/national/japan-fresh-stimulus/	Japan looks to spend trillion on fresh stimulus amid price surgeThe package will mainly see increased support for sectors that rely on fuel or grain such as the transportation and agriculture industries	2022-03-30 21:40:02
海外ニュース	Japan Times latest articles	A judge says Trump broke the law. Here’s why that matters.	https://www.japantimes.co.jp/opinion/2022/03/30/commentary/world-commentary/trump-broke-law/	A judge says Trump broke the law Here s why that matters A legal opinion affirming the “illegality of a plan to overturn the election won t end partisan polarization but there s value in stating what s obviously	2022-03-30 21:04:40
海外ニュース	Japan Times latest articles	Should I hoard cash during a crisis?	https://www.japantimes.co.jp/opinion/2022/03/30/commentary/world-commentary/cash-during-crisis/	versus	2022-03-30 21:03:24
ニュース	BBC News - Home	Catastrophic failures led to mother and baby deaths	https://www.bbc.co.uk/news/uk-england-shropshire-60925959?at_medium=RSS&at_campaign=KARANGA	failures	2022-03-30 12:48:49
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ニュース	BBC News - Home	Baby P: Mother Tracey Connelly approved for prison release	https://www.bbc.co.uk/news/uk-england-london-60919738?at_medium=RSS&at_campaign=KARANGA	london	2022-03-30 12:53:17
ニュース	BBC News - Home	Boris Johnson must resign over lawbreaking at No 10 - Starmer	https://www.bbc.co.uk/news/uk-politics-60928083?at_medium=RSS&at_campaign=KARANGA	lockdown	2022-03-30 12:53:21
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