投稿時間:2022-07-03 06:12:12 RSSフィード2022-07-03 06:00 分まとめ(16件)

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海外TECH	MakeUseOf	5 Alternative Calculator Apps for macOS	https://www.makeuseof.com/tag/5-interesting-calculator-alternatives-for-mac-os-x/	alternative	2022-07-02 20:45:13
海外TECH	MakeUseOf	How to Add a Paint Drip Effect to a Portrait in Photoshop	https://www.makeuseof.com/photoshop-how-to-create-paint-drip-effect/	photoshop	2022-07-02 20:30:14
海外TECH	DEV Community	Introducing Docker Concepts, Containers, and more	https://dev.to/roselinebassey/introducing-docker-concepts-containers-and-more-17hc	Introducing Docker Concepts Containers and more What is Docker Docker is an open source containerization platform used to build test manage and deploy applications in a cloud based environment Docker provides a way to package an application into a container which can be run from any machine that has the Docker software installed It makes it easy for you to run an application across different machines or environments As organizations shift toward cloud native and hybrid development Docker is rapidly becoming the preferred tool for building and sharing containerized apps New to Docker You re in luck This blog post will help you understand what Docker is and what problems it solves How Docker differs from virtual environments and the benefits of using Docker in development containerization and its advantages Knowing these concepts will make Docker much clearer to get started But first let s learn about Docker s origin Origin of DockerDocker was first released in and has since become one of the most popular tools for developers The idea for Docker came about when Solomon Hykes the creator of Docker was working on a project at dotCloud a cloud hosting provider The project required him to use many different virtual machines each with different versions of the same software This was difficult to manage and ended up being very time consuming To make his life easier Solomon created a tool that would enable him to package an application and its dependencies into a single container This way he could easily move the application between different machines without having to worry about compatibility issues Docker makes it easy for developers to create deploy and run applications in a consistent environment without the need to worry about differences between machines Docker has since gained popularity and saw more support from commercial companies such as Amazon and Microsoft further bolstering its credibility in the container management market How Did it Become so Popular Docker became popular because it offered a way to package an application with all its dependencies into a “container The containers are portable and can be run on any machine that has the Docker runtime installed It also provided a way to share these containers using Docker Hub which is like GitHub but for Docker images Problem Before DockerIn the past developing and deploying software applications has been a time consuming and error prone process This is because each application has its dependencies and configurations which can often conflict with other applications Traditionally applications are built on a type of architecture called monolithic In monolithic architecture all components of an application are packaged together in one large program Each line of code libraries and dependencies is connected to one another meaning that each layer of the application is built on top of each other which often creates a series of problems In traditional methods code is developed in a specific computing environment which when transferred to a new location often results in bugs and errors One of the most likely problems developers complain about is the it works on my machine problem With Docker developers can collaborate on projects without fear of breaking each other s code Imagine you are part of a developer s team and you are working on a Javascript application that requires PostgreSQL and Redis for messaging You ll need to install these services directly on your operating system For any developer within your team to deploy the app they must install binaries of these services configure them and run them locally Installation may look very different depending on which operating system is used and may involve many steps that need to be performed and perhaps something could turn out wrong This process can be frustrating and costly and you may have some difficulty scaling and deploying applications Deploying and packaging apps in a reliable and repeatable way has always been a pain point According to Rob Vettor and Steve “ardalis in Architecting Cloud Native NET Apps for Azure some of the problems you could face using this architecture include The app has become so overwhelmingly complicated that no single person understands it You fear making changes each change has unintended and costly side effects New features fixes become tricky time consuming and expensive to implement Each release becomes as small as possible and requires the full deployment of the entire application One unstable component can crash the entire system New technologies and frameworks aren t an option Its difficult to implement agile delivery methodologies Architectural erosion sets in as the code base deteriorates with never ending “quick fixes Finally the consultants come in and tell you to rewrite it Due to this many organizations have shifted to adopting a cloud native approach to building containerized applications ContainerizationContainerization eliminates these problems by bundling the application code together with the related configuration files and dependencies making it easy to deploy and run in any environment Containerization is a type of virtualization that allows you to run multiple applications on a single server This can be extremely beneficial for businesses as it can help to save on server costs and increase efficiency Containerization has many benefits but one of the most important is that it eliminates the it works on my machine problem This is because the container includes everything needed to run the application so it will work the same in any environment This is a huge benefit for software developers as it makes it much easier to develop and test applications If you re looking for a way to improve the development and deployment of your software then containerization is a great option to consider ContainerContainers help simplify the process of deploying applications Containers allow you to isolate each component or layer of an application from each other It allows you to run different applications on the same host without them interfering with each other Image source DockerIn the diagram above each application container is isolated from other containers managed by Docker in your host operating system Hence the breakdown of one container does not affect the performance of another Benefits of Containers Some of the key benefits of containerization include Containers are lighter and require fewer resources thereby making them more efficient to run Containers can be moved easily between environments making them ideal for development and testing Isolation between containers prevents one application from affecting another improving stability and security Increased security since container isolation prevents malicious code from infecting the underlying system Improved performance since containers do not need to be booted every time they are run Easy to Use Containerization is easy to set up and use which can save you time and money Scalable You can easily scale your containerized applications to meet the demands of your business Portable You can move containerized applications between servers which makes it easy to maintain and update them Overall containerization provides a more efficient and robust way to deploy applications MonolithicMonolithic software architecture is one in which all components are tightly coupled and interdependent This type of architecture has been traditionally used for large scale applications The main disadvantage of a monolithic architecture is that it can be more difficult to maintain and modify Because all components are tightly coupled a change to one component can potentially break other components In addition monolithic architectures can be more difficult to scale than other architectures MicroservicesMicroservices refers to the practice by which applications are broken down into smaller pieces called “microservices so they can be built individually and then wired together when needed This allows for greater flexibility and scalability The difference between Docker and virtual machinesDocker and virtual machines are both popular ways to organize and isolate applications Image source MediumDocker is a containerization platform that allows you to create and run isolated applications With Docker you can bundle your application into containers Containers are lighter than virtual machines and can be spun up more quickly They re also more portable since they can be deployed on any machine that supports Docker Virtual machines are full fledged operating systems that are run on top of a hypervisor Virtual machines are also less portable than containers since they require specific hardware configurations They re also heavier and take longer to spin up They are isolated from each other so an attacker who compromises one virtual machine cannot access other virtual machines on the same host Summary Our discussion covered the basics that can help you get started with Docker but you also learned about Docker as a whole why Docker was created and the problems it addresses You also learned about containerization and how it makes it easier to deploy apps from desktops to the cloud You learned about the benefits of using containers in app development The difference between a virtual machine and Docker was also discussed as well as monolithic and microservices The following resources will help you learn more about Docker Resources Introduction to Container By Red HatTechWorld with Nana Docker Tutorial for BeginnersDocker Tutorial for Beginners What is Docker Introduction to ContainersProgramming with Mosh Docker Tutorial for Beginners	2022-07-02 20:33:50
海外TECH	DEV Community	Leetcode Solutions: Count Asterisks	https://dev.to/salahelhossiny/leetcode-solutions-count-asterisks-2481	Leetcode Solutions Count AsterisksYou are given a string s where every two consecutive vertical bars are grouped into a pair In other words the st and nd make a pair the rd and th make a pair and so forth Return the number of in s excluding the between each pair of Note that each will belong to exactly one pair class Solution object def countAsterisks self s if not in s return stack count for char in s if char count stack append char if count while count el stack pop if el count return join stack count	2022-07-02 20:08:22
ニュース	BBC News - Home	Pride in London: More than a million attend 'biggest ever parade'	https://www.bbc.co.uk/news/uk-england-london-62021527?at_medium=RSS&at_campaign=KARANGA	mayor	2022-07-02 20:25:23
ニュース	BBC News - Home	Wimbledon: Nick Kyrgios fights back to beat Stefanos Tsitsipas in heated third-round match	https://www.bbc.co.uk/sport/tennis/62021165?at_medium=RSS&at_campaign=KARANGA	Wimbledon Nick Kyrgios fights back to beat Stefanos Tsitsipas in heated third round matchNick Kyrgios fights back to stun Greek fourth seed Stefanos Tsitsipas in a heated four set encounter and reach the fourth round at Wimbledon	2022-07-02 20:49:24
ニュース	BBC News - Home	Israel shoots down Hezbollah drones heading for gas rig	https://www.bbc.co.uk/news/world-europe-62022452?at_medium=RSS&at_campaign=KARANGA	border	2022-07-02 20:45:58
ビジネス	ダイヤモンド・オンライン - 新着記事	東京きらぼし傘下のUI銀行社長が明かすデジタルバンクの真の目的、「低効率体質から脱却」 - 金融DX大戦	https://diamond.jp/articles/-/305399		2022-07-03 05:25:00
ビジネス	ダイヤモンド・オンライン - 新着記事	プーチンもショック!?ソ連の「寿命」は何年だった？【3分歴史チャレンジ】 - 賢者は歴史に学ぶ！ 歴史入門	https://diamond.jp/articles/-/305363	超大国	2022-07-03 05:20:00
ビジネス	ダイヤモンド・オンライン - 新着記事	野村HDと大和証券「脱・回転売買」の営業改革は進んだか？“費用カバー率”で検証 - 決算書100本ノック！2022夏	https://diamond.jp/articles/-/305312		2022-07-03 05:15:00
ビジネス	ダイヤモンド・オンライン - 新着記事	日銀815万円・DBJ1006万円…政府系金融機関の平均年収、民間430万円との驚愕格差実態 - 円安・金利高・インフレで明暗くっきり！ 株価・給料・再編 5年後の業界地図	https://diamond.jp/articles/-/304974	政府系金融機関	2022-07-03 05:10:00
ビジネス	ダイヤモンド・オンライン - 新着記事	家賃2.5万円の社宅を出て、住宅ローン返済16万円に苦悩…40代男性の老後は大丈夫？ - お金持ちになれる人、貧乏になる人の家計簿　深野康彦	https://diamond.jp/articles/-/305759	家賃万円の社宅を出て、住宅ローン返済万円に苦悩…代男性の老後は大丈夫お金持ちになれる人、貧乏になる人の家計簿深野康彦今回は、代男性からの相談をピックアップする。	2022-07-03 05:05:00
北海道	北海道新聞	女子板飛び込み、三上は７位　世界水泳、男子高飛び玉井ら決勝	https://www.hokkaido-np.co.jp/article/701146/	世界水泳	2022-07-03 05:52:37
北海道	北海道新聞	サッカー板倉、ボルシアＭＧ移籍　日本代表ＤＦ	https://www.hokkaido-np.co.jp/article/701149/	日本代表	2022-07-03 05:52:37
北海道	北海道新聞	ＫＤＤＩ、障害復旧急ぐ　３日午前を目標に作業	https://www.hokkaido-np.co.jp/article/701148/	kddiau	2022-07-03 05:22:18
ビジネス	東洋経済オンライン	うつになり｢壊れていく父｣…娘が抱え続けた葛藤 多重人格のようになり､自殺予告を繰り返す | おとなたちには、わからない | 東洋経済オンライン	https://toyokeizai.net/articles/-/600086?utm_source=rss&utm_medium=http&utm_campaign=link_back	多重人格	2022-07-03 05:40:00