TWI712293B - System and method for providing serverless service - Google Patents

System and method for providing serverless service Download PDF

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TWI712293B
TWI712293B TW108144511A TW108144511A TWI712293B TW I712293 B TWI712293 B TW I712293B TW 108144511 A TW108144511 A TW 108144511A TW 108144511 A TW108144511 A TW 108144511A TW I712293 B TWI712293 B TW I712293B
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application environment
module
function
build
image file
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林永為
鄭仁賢
連文達
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中華電信股份有限公司
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This invention provides a system for providing serverless service, including a configuration module for configuring application environment settings and function execution information; a build module for building application environments; and an execution module for performing functions. This invention installs a dependency package when building a serverless application environment, so that there is no need to package the dependency package when uploading functions. As such, it eliminates tedious installation steps and saves network bandwidth to improve efficiency. The invention also discloses a method for providing serverless services.

Description

提供無伺服器服務之系統及方法System and method for providing serverless service

本發明係關於一種雲端服務技術,特別是關於一種提供無伺服器(Serverless)服務之系統及方法。 The present invention relates to a cloud service technology, in particular to a system and method for providing serverless services.

無伺服器服務是近幾年快速崛起的服務,使用者係透過無伺服器服務快速建置應用服務。一般在無伺服器服務上建置應用服務(例如,程式)時,使用者須將程式會使用的相依套件一起打包上傳到無伺服器服務上。然而此種做法會遭遇以下難題:第一,部分相依套件的容量龐大,導致程式上傳速度極慢;第二,部分程式語言沒有自動化建置工具,因此需手動抓取相依套件,造成應用服務之建置步驟繁瑣。 Serverless service is a service that has risen rapidly in recent years, and users quickly build application services through serverless services. Generally, when building an application service (for example, a program) on a serverless service, the user must package and upload the dependent packages used by the program to the serverless service. However, this approach will encounter the following problems: First, the large capacity of some dependent packages results in extremely slow program upload speed; second, some programming languages do not have automated build tools, so the dependent packages need to be manually fetched, resulting in application services. The build steps are cumbersome.

因此,需要一種系統及方法,使使用者可以依照應用服務需要的相依套件自動化地快速建置出無伺服器應用環境,而不必在無伺服器服務中上傳程式時把相依套件上傳,進而降低程式大小、增加程式上傳速度、以及提升使用者使用無伺服器服務的品質及使用意願,並提升效率。 Therefore, there is a need for a system and method that enables users to automatically and quickly build a serverless application environment according to the dependent packages required by the application service, instead of uploading the dependent packages when uploading programs in the serverless service, thereby reducing the program Size, increase program upload speed, and improve the quality and willingness of users to use serverless services, and improve efficiency.

為解決至少上述問題,本發明提供一種提供無伺服器服務之系統,包括:設定模組,係用於設定應用環境設定及功能(function)執行資訊,其中,該應用環境設定包括相依套件資訊及應用環境程式類型;建置模組,係用於根據該應用環境設定建置應用環境及根據該相依套件資訊及該應用環境程式類型安裝相依套件;以及執行模組,係用於根據該功能執行資訊執行功能(function)。 In order to solve at least the above-mentioned problems, the present invention provides a serverless service system, including: a configuration module for setting application environment settings and function execution information, wherein the application environment settings include dependent package information and Application environment program type; the build module is used to build the application environment according to the application environment settings and install the dependent package according to the dependent package information and the application environment program type; and the execution module is used to execute according to the function Information execution function (function).

在前述之系統中,復包括容器化工具,其中,該建置應用環境之方式係包括以下步驟:令該建置模組根據該應用環境設定產生容器映像檔建置腳本;以及令該建置模組根據該容器映像檔建置腳本操作該容器化工具來建置容器映像檔。 In the aforementioned system, multiple containerization tools are included, wherein the method of building an application environment includes the following steps: making the build module generate a container image build script according to the setting of the application environment; and making the build The module operates the containerization tool according to the container image file building script to build the container image file.

在前述之系統中,復包括用於儲存該容器映像檔之映像檔倉庫。 In the aforementioned system, an image file warehouse for storing the container image file is included.

在前述之系統中,該功能執行資訊包括功能(function)之名稱、記憶體大小、程式進入點及指定執行之應用環境。 In the aforementioned system, the function execution information includes the name of the function, the size of the memory, the entry point of the program, and the application environment for the specified execution.

在前述之系統中,該建置應用環境之方式係包括令該建置模組根據該應用環境設定安裝功能載入器。 In the aforementioned system, the method of constructing the application environment includes setting the construction module to install the function loader according to the application environment.

在前述之系統中,該執行功能之方式係包括以下步驟:令該執行模組根據該功能執行資訊載入該應用環境;令該執行模組透過該功能載入器載入該功能(function);以及令該執行模組根據該功能執行資訊執行該功能(function)。 In the aforementioned system, the method for executing a function includes the following steps: order the execution module to load the application environment according to the function execution information; order the execution module to load the function through the function loader ; And make the execution module execute the function according to the function execution information.

本案復提供一種提供無伺服器服務之方法,包括:透過設定模組設定應用環境設定,其中,該應用環境設定包括相依套件資訊;以及令建置模組根據該應用環境設定建置應用環境,以根據該相依套件資訊於該應用環境中安裝相依套件。 This case provides a method for providing serverless services, including: setting application environment settings through a setting module, where the application environment settings include dependent package information; and making the build module build the application environment according to the application environment settings, In order to install the dependent package in the application environment according to the dependent package information.

在前述之方法中,該令建置模組根據該應用環境設定建置應用環境之步驟係包括以下子步驟:令該建置模組根據該應用環境設定產生容器映像檔建置腳本,其中,該容器映像檔建置腳本包括安裝該相依套件的指令;令該建置模組根據該容器映像檔建置腳本操作容器化工具以建置容器映像檔並根據該指令安裝該相依套件;以及令該建置模組將該容器映像檔儲存至映像檔倉庫。 In the aforementioned method, the step of instructing the build module to build the application environment according to the application environment setting includes the following sub-steps: making the build module generate a container image file build script according to the application environment setting, wherein, The container image file building script includes an instruction to install the dependent package; order the build module to operate the containerization tool according to the container image file building script to build the container image file and install the dependent package according to the instruction; and The build module stores the container image file in the image file warehouse.

在前述之方法中,復包括:透過該設定模組設定功能(function)執行資訊;透過該設定模組上傳功能(function);令執行模組根據該功能執行資訊載入該應用環境;以及令該執行模組執行該功能(function)。 In the aforementioned method, the multiple steps include: setting function execution information through the setting module; uploading function (function) through the setting module; making the execution module load the application environment according to the function execution information; and The execution module executes the function.

在前述之方法中,該功能執行資訊包括該功能之名稱、記憶體大小、程式進入點及指定執行之應用環境。 In the aforementioned method, the function execution information includes the function's name, memory size, program entry point, and designated execution application environment.

由上可知,本發明提供使用者選擇程式需要的相依套件並自動化建立出無伺服器的應用環境,因此使用者上傳功能(function)時不需將相依套件打包,故能大幅降低程式容量大小,增加上傳速度,及提升系統的效能及節省網路頻寬,並且因免除了繁瑣的相依套件打包步驟,故能提升使用者使用無伺服器服務的品質及使用意願,並提升效率。 It can be seen from the above that the present invention provides the user to select the dependent package required by the program and automatically creates a server-less application environment. Therefore, the user does not need to package the dependent package when uploading functions, so the program capacity can be greatly reduced. Increasing upload speed, improving system performance and saving network bandwidth, and eliminating cumbersome package packaging steps, it can improve the quality and willingness of users to use serverless services, and improve efficiency.

100‧‧‧應用功能管理器、AFM 100‧‧‧Application Function Manager, AFM

101‧‧‧設定模組101‧‧‧Setting Module

102‧‧‧建置模組102‧‧‧Build Module

103‧‧‧執行模組103‧‧‧Execution Module

104‧‧‧容器化工具104‧‧‧Containerization tool

105‧‧‧映像檔倉庫105‧‧‧Image File Warehouse

S301~S304、S401~S404‧‧‧步驟S301~S304, S401~S404‧‧‧Step

本案揭露之具體實施例將搭配下列圖式詳述,這些說明顯示在下列圖式: The specific embodiments disclosed in this case will be described in detail with the following figures, which are shown in the following figures:

第1圖為本發明之提供無伺服器服務之系統架構圖。 Figure 1 is a system architecture diagram of the present invention for providing serverless services.

第2圖為本發明之提供無伺服器服務之方法的步驟流程圖。 Figure 2 is a flowchart of the steps of the method for providing serverless services according to the present invention.

以下藉由特定的實施例說明本發明之實施方式,熟習此項技藝之人士可由本文所揭示之內容輕易地瞭解本案之其他優點及功效。本說明書所附圖式所繪示之結構、比例、大小等均僅用於配合說明書所揭示之內容,以供熟悉此技藝之人士之瞭解與閱讀,非用於限定本發明可實施之限定條件,故任何修飾、改變或調整,在不影響本案所能產生之功效及所能達成之目的下,均應仍落在本發明所揭示之技術內容得能涵蓋之範圍內。 The following specific examples illustrate the implementation of the present invention. Those familiar with the art can easily understand the other advantages and effects of the present application from the content disclosed in this article. The structure, proportion, size, etc. shown in the drawings in this specification are only used to match the content disclosed in the specification for the understanding and reading of those familiar with the art, and are not used to limit the implementation of the present invention. Therefore, any modification, change or adjustment shall still fall within the scope of the technical content disclosed in the present invention, without affecting the effects and objectives that can be achieved in this case.

如第1圖所示,本發明提供無伺服器服務之系統主要包括應用功能管理器(Application Function Manager,AFM)100、容器化工具104及映像檔倉庫105。其中,應用功能管理器100係為管理並執行功能(function)的無伺服器系統,容器化工具104係根據AFM 100之設定自動建置應用環境(例如,容器映像檔),而映像檔倉庫105則支援多個容器映像檔之儲存。 As shown in Figure 1, the system for providing serverless services in the present invention mainly includes an Application Function Manager (AFM) 100, a containerization tool 104, and an image file warehouse 105. Among them, the application function manager 100 is a serverless system that manages and executes functions, the containerization tool 104 automatically builds an application environment (for example, a container image file) according to the settings of the AFM 100, and the image file warehouse 105 It supports the storage of multiple container images.

本發明之應用功能管理器100復包括設定模組101、建置模組102及執行模組103。 The application function manager 100 of the present invention further includes a setting module 101, a construction module 102, and an execution module 103.

設定模組101係提供輸入介面,提供使用者設定應用環境設定,應用環境設定可包括應用環境之名稱、版本、程式類型、須預載的相依套件(例如,函式庫(library))及相依套件版本(函式庫版本)等。並且,使用者係可依需求操作設定模組101以設定多組應用環境設定。在使用者完成應用環境之設定後,設定模組101係將建立完成之應用環境設定提供給建置模組102以進行後續建置應用環境的步驟。 The setting module 101 provides an input interface for users to set application environment settings. The application environment settings can include the name, version, program type of the application environment, pre-loaded dependent packages (for example, library), and dependencies Package version (library version), etc. In addition, the user can operate the setting module 101 to set multiple sets of application environment settings as required. After the user completes the setting of the application environment, the setting module 101 provides the completed application environment setting to the building module 102 for subsequent steps of building the application environment.

建置模組102係根據設定模組101提供之應用環境設定自動化產生容器映像檔建置腳本(例如,Dockerfile),並依據容器映像檔建置腳本操作容器化工具104(例如,Docker)以建置容器映像檔。建置容器映像檔期間,建置模組102復依據應用環境設定安裝相依套件(例如,函式庫)及功能(function)載入器。建置模組102安裝函式庫之方法係根據不同之應用環境程式類型而有不同做法,舉例來說,對於Java程式類型的功能(function),建置模組102係採用Gradle自動化建置工具打包函式庫;或者,對於Python程式類型的功能(function),建置模組102係採用pip套件管理工具安裝相依套件。最後,在建置模組102完成容器映像檔之建置後,建置模組102係將建置完成之容器映像檔儲存至映像檔倉庫105中。 The build module 102 automatically generates a container image file build script (for example, Dockerfile) according to the application environment settings provided by the setting module 101, and operates the containerization tool 104 (for example, Docker) according to the container image file build script to build Set the container image file. During the construction of the container image file, the construction module 102 installs dependent packages (for example, a library) and a function loader according to the application environment settings. The method for the build module 102 to install the library varies according to different application environment program types. For example, for the Java program type functions, the build module 102 uses the Gradle automated build tool Package the library; or, for functions of the Python program type, the build module 102 uses the pip package management tool to install dependent packages. Finally, after the construction module 102 completes the construction of the container image file, the construction module 102 stores the constructed container image file in the image file warehouse 105.

設定模組101還提供使用者設定功能(function)之執行資訊並上傳功能(function)。其中,功能(function)之執行資訊係包括:功能(function)之名稱、記憶體大小、程式進入點、以及指定之應用環境等。設定模組101係將功能(function)之執行資訊提供給執行模組103。 The setting module 101 also provides execution information of the user setting function (function) and uploading the function (function). Among them, the execution information of the function includes: the name of the function, the size of the memory, the program entry point, and the designated application environment. The setting module 101 provides the execution information of the function to the execution module 103.

當執行模組103執行功能(function)時,執行模組103係根據設定模組101提供之執行資訊載入功能(function)需求的應用環境,設定功能(function)的記憶體大小,並透過建置模組102安裝的功能載入器及設定模組101設定之程式進入點載入並執行功能(function)。 When the execution module 103 executes a function, the execution module 103 sets the memory size of the function according to the application environment required by the execution information loading function (function) provided by the setting module 101, and builds The function loader installed in the setting module 102 and the program entry point set by the setting module 101 loads and executes functions.

本發明使用AFM 100建置無伺服器應用環境及執行功能(function)之步驟流程(例如,建立一個Java程式語言的無伺服器應用)係如第2圖所示。其中,建置無伺服器應用環境的步驟係如步驟S301至S304所示,而使用者透過應用環境執行功能之步驟係如步驟S401至S404所示。 The present invention uses the AFM 100 to build a serverless application environment and the process of executing functions (for example, creating a serverless application in the Java programming language) is shown in Figure 2. The steps for building a serverless application environment are as shown in steps S301 to S304, and the steps for a user to execute functions through the application environment are as shown in steps S401 to S404.

假設一個Java程式(即,功能(function))需要使用apache-common及http-client二種相依套件,使用者係在步驟S301處透過設定模組101建立此Java程式的應用環境設定,並且應用環境設定復包括apache-common及http-client相依套件的名稱及版本。 Assuming that a Java program (i.e., function) needs to use two dependent packages of apache-common and http-client, the user establishes the application environment settings of this Java program through the setting module 101 at step S301, and the application environment The configuration file includes the names and versions of apache-common and http-client dependent packages.

步驟S301完成之應用環境設定係在步驟S302處提供給建置模組102以自動產生一份容器映像檔建置腳本(例如,Dockerfile),此容器映像檔建置腳本還包括安裝apache-common及http-client相依套件的指令。 The application environment setting completed in step S301 is provided to the build module 102 at step S302 to automatically generate a container image file build script (for example, Dockerfile). The container image file build script also includes installing apache-common and Commands of http-client dependent packages.

在步驟S303處,建置模組102係根據容器映像檔建置腳本操作容器化工具104(例如,Docker)以建置一個容器映像檔,並且建置容器映像檔過程中復一併安裝apache-common及http-client相依套件以及功能載入器。 At step S303, the build module 102 operates the containerization tool 104 (for example, Docker) according to the container image build script to build a container image file, and installs apache- in the process of building the container image file. Common and http-client dependent packages and function loader.

在步驟S304處,建置模組102係將建置完成之容器映像檔儲存至映像檔倉庫105中,並完成無伺服器應用環境之建置。 At step S304, the building module 102 stores the completed container image file in the image file warehouse 105, and completes the building of the serverless application environment.

使用者透過建置完成之應用環境執行功能(例如,前述之Java程式)之步驟流程係如下步驟S401至S404所描述,且步驟S401至S404係可獨立於步驟S301至S304執行。 The step flow of the application environment executed by the user through the application environment (for example, the aforementioned Java program) is described in the following steps S401 to S404, and the steps S401 to S404 can be executed independently of the steps S301 to S304.

在步驟S401處,使用者係透過設定模組101建立功能之執行資訊,例如,功能之名稱、記憶體大小、程式進入點、指定之應用環境等,並且指定之應用環境係可選擇為上述步驟S301至S304建置之應用環境,或是映像檔倉庫105儲存之其他適合的應用環境。 In step S401, the user establishes the execution information of the function through the setting module 101, for example, the name of the function, memory size, program entry point, designated application environment, etc., and the designated application environment can be selected as the above step The application environment built in S301 to S304, or other suitable application environments stored in the image file warehouse 105.

在步驟S402處,使用者係透過設定模組101將功能上傳,且上傳功能時不須打包apache-common及http-client相依套件。 In step S402, the user uploads the function through the setting module 101, and the apache-common and http-client dependency packages do not need to be packaged when uploading the function.

在步驟S403處,執行模組103係依據設定模組101建立之功能的執行資訊載入對應的應用環境,並透過功能載入器(例如,步驟S303處安裝的功能載入器)載入功能。 At step S403, the execution module 103 loads the corresponding application environment according to the execution information of the function created by the setting module 101, and loads the function through the function loader (for example, the function loader installed in step S303) .

在步驟S404處,執行模組103係依據功能的執行資訊設定之程式進入點執行功能。 In step S404, the execution module 103 executes the function according to the program entry point set by the execution information of the function.

綜上所述,本發明之建置無伺服器應用環境之系統及方法相較於習知的無伺服器服務,係於建置無伺服器應用環境時安裝相依套件,故不須在上傳功能時將相依套件打包,因此免除了繁瑣的相依套件安裝步驟並節省了網路頻寬,以提升效率。 In summary, the system and method for constructing a serverless application environment of the present invention are compared with the conventional serverless service. The dependency package is installed when the serverless application environment is built, so the upload function is not required. Dependent packages are packaged at the same time, thus eliminating the tedious installation steps of dependent packages and saving network bandwidth to improve efficiency.

舉例來說,一個須打包apache-common及http-client相依套件的Java HelloWorld程式約需2609KB的記憶體大小,然而透過本發明之提供無伺服器服務之系統及方法,由於上傳Java HelloWorld程式時不須打包apache-common及http-client相依套件,因此僅需要4KB的記憶體大小,減少了99%的容量。當相依套件的容量更大時(例如,程式語言函式庫tensorflow一般佔有約400MB的記憶體大小),因本發明之提供無伺服器服務之系統及方法不必每次上傳功能時皆須將此400MB的相依套件一起上傳,故明顯能提升系統的效能及節省網路頻寬,進而提升使用者使用無伺服器服務的品質及使用意願。 For example, a Java HelloWorld program that requires apache-common and http-client dependency packages requires about 2609KB of memory. However, through the system and method for providing serverless services of the present invention, the Java HelloWorld program is not uploaded. The apache-common and http-client dependencies must be packaged, so only 4KB of memory is required, which reduces the capacity by 99%. When the capacity of the dependent package is larger (for example, the programming language library tensorflow generally occupies about 400MB of memory), because the system and method for providing serverless services of the present invention does not need to be uploaded every time the function is uploaded The 400MB dependent packages are uploaded together, so it can obviously improve the performance of the system and save network bandwidth, thereby enhancing the quality and willingness of users to use serverless services.

上述實施例係用以例示性說明本發明之原理及其功效,而非用於限制本發明。任何熟習此項技藝之人士均可在不違背本發明之精神及範疇下,對上述實施例進行修改。因此本發明之權利保護範圍,應如後述之申請專利範圍所列。 The above-mentioned embodiments are used to exemplify the principles and effects of the present invention, but not to limit the present invention. Anyone who is familiar with the art can modify the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the rights of the present invention should be listed in the scope of patent application described later.

100‧‧‧應用功能管理器、AFM 100‧‧‧Application Function Manager, AFM

101‧‧‧設定模組101‧‧‧Setting Module

102‧‧‧建置模組102‧‧‧Build Module

103‧‧‧執行模組103‧‧‧Execution Module

104‧‧‧容器化工具104‧‧‧Containerization tool

105‧‧‧映像檔倉庫105‧‧‧Image File Warehouse

Claims (7)

  1. 一種提供無伺服器服務之系統,包括:設定模組,係用於設定應用環境設定及功能執行資訊,其中,該應用環境設定包括相依套件資訊及應用環境程式類型;建置模組,係用於根據該應用環境設定建置應用環境及根據該相依套件資訊及該應用環境程式類型安裝相依套件;以及執行模組,係用於根據該功能執行資訊執行功能,其中,該功能執行資訊包括該功能之名稱、記憶體大小、程式進入點及指定執行之應用環境。 A system for providing serverless services, including: a configuration module for setting application environment settings and function execution information, where the application environment settings include dependent package information and application environment program types; a build module is used The application environment is built according to the application environment setting and the dependent package is installed according to the dependent package information and the application environment program type; and the execution module is used to execute the function according to the function execution information, wherein the function execution information includes the The name of the function, memory size, program entry point and application environment designated for execution.
  2. 如申請專利範圍第1項所述之系統,復包括容器化工具,其中,該建置應用環境之方式係包括以下步驟:令該建置模組根據該應用環境設定產生容器映像檔建置腳本;以及令該建置模組根據該容器映像檔建置腳本操作該容器化工具來建置容器映像檔。 For example, the system described in item 1 of the scope of patent application includes containerized tools, wherein the method of building an application environment includes the following steps: making the build module generate a container image file build script according to the application environment settings ; And make the build module operate the containerization tool according to the container image build script to build the container image.
  3. 如申請專利範圍第2項所述之系統,復包括用於儲存該容器映像檔之映像檔倉庫。 The system described in item 2 of the scope of patent application includes an image file warehouse for storing the container image file.
  4. 如申請專利範圍第1項所述之系統,其中,該建置應用環境之方式係包括令該建置模組根據該應用環境設定安裝功能載入器。 For example, in the system described in item 1 of the scope of patent application, the method of constructing the application environment includes setting the construction module to install the function loader according to the application environment.
  5. 如申請專利範圍第4項所述之系統,其中,該執行功能之方式係包括以下步驟:令該執行模組根據該功能執行資訊載入該應用環境;令該執行模組透過該功能載入器載入該功能;以及 令該執行模組根據該功能執行資訊執行該功能。 For example, in the system described in item 4 of the scope of patent application, the method of executing the function includes the following steps: order the execution module to load the application environment according to the function execution information; order the execution module to load through the function Load the function; and Make the execution module execute the function according to the function execution information.
  6. 一種提供無伺服器服務之方法,包括:透過設定模組設定應用環境設定,其中,該應用環境設定包括相依套件資訊;令建置模組根據該應用環境設定建置應用環境,以根據該相依套件資訊於該應用環境中安裝相依套件;透過該設定模組設定功能執行資訊;透過該設定模組上傳功能;令執行模組根據該功能執行資訊載入該應用環境;以及令該執行模組執行該功能,其中,該功能執行資訊包括該功能之名稱、記憶體大小、程式進入點及指定執行之應用環境。 A method for providing serverless services includes: setting application environment settings through a setting module, where the application environment settings include dependent package information; and instructing the build module to build the application environment according to the application environment settings, so as Package information Install dependent packages in the application environment; set function execution information through the configuration module; upload functions through the configuration module; make the execution module load the application environment based on the function execution information; and make the execution module Execute the function, where the function execution information includes the name of the function, memory size, program entry point and application environment designated to execute.
  7. 如申請專利範圍第6項所述之方法,其中,該令建置模組根據該應用環境設定建置應用環境之步驟係包括以下子步驟:令該建置模組根據該應用環境設定產生容器映像檔建置腳本,其中,該容器映像檔建置腳本包括安裝該相依套件的指令;令該建置模組根據該容器映像檔建置腳本操作容器化工具以建置容器映像檔並根據該指令安裝該相依套件;以及令該建置模組將該容器映像檔儲存至映像檔倉庫。 For example, the method described in item 6 of the scope of patent application, wherein the step of instructing the build module to build the application environment according to the application environment setting includes the following sub-steps: making the build module generate a container according to the application environment setting An image file build script, where the container image file build script includes an instruction to install the dependent package; the build module is made to operate the containerization tool according to the container image file build script to build the container image file according to the Instruct the installation of the dependent package; and instruct the build module to store the container image file in the image file warehouse.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8543998B2 (en) 2008-05-30 2013-09-24 Oracle International Corporation System and method for building virtual appliances using a repository metadata server and a dependency resolution service

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8543998B2 (en) 2008-05-30 2013-09-24 Oracle International Corporation System and method for building virtual appliances using a repository metadata server and a dependency resolution service

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