{"id":2986,"date":"2017-04-18T05:00:23","date_gmt":"2017-04-18T12:00:23","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=2986"},"modified":"2023-07-21T00:41:13","modified_gmt":"2023-07-21T07:41:13","slug":"docker-deploy-containerized-java-couchbase-web-application","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/docker-deploy-containerized-java-couchbase-web-application\/","title":{"rendered":"Use o Docker para implantar um aplicativo da Web Java em cont\u00eainer com Couchbase"},"content":{"rendered":"

N\u00e3o faz muito tempo, escrevi sobre Containeriza\u00e7\u00e3o de uma API RESTful do Node.js e do servidor Couchbase<\/a> para demonstrar como \u00e9 f\u00e1cil implantar aplicativos da Web de forma r\u00e1pida e confi\u00e1vel. Nesse guia, criamos uma API simples, constru\u00edmos uma imagem do Docker a partir dela, implantamos como um cont\u00eainer e implantamos o Couchbase como um cont\u00eainer. No entanto, sei que nem todos est\u00e3o familiarizados com o Node.js.<\/p>\n

Aqui, vamos criar uma API RESTful Java simples usando o Spring Boot, criar um Docker<\/a> a partir dela e implant\u00e1-la como um cont\u00eainer com Couchbase<\/a>. Isso criar\u00e1 um ambiente familiar para os desenvolvedores Java.<\/p>\n

<\/p>\n

Este tutorial exige que voc\u00ea tenha um Docker instalado e configurado em seu computador. Com o Docker, criaremos imagens personalizadas do Docker e as implantaremos como cont\u00eaineres.<\/p>\n

Criar uma imagem do Docker personalizada para o Couchbase Server<\/h2>\n

Vamos come\u00e7ar criando uma imagem Docker personalizada para o Couchbase Server. Embora uma imagem imagem oficial do Couchbase<\/a> existe, ela n\u00e3o \u00e9 provisionada automaticamente quando implantada. Nossa imagem personalizada ser\u00e1 provisionada automaticamente ap\u00f3s a implementa\u00e7\u00e3o como um cont\u00eainer.<\/p>\n

Em algum lugar de seu computador, crie um diret\u00f3rio com o nome\u00a0Dockerfile<\/strong> arquivo e\u00a0configure.sh<\/strong> nele. O arquivo\u00a0Dockerfile<\/strong> ser\u00e1 o modelo para nossa imagem e o arquivo\u00a0configure.sh<\/strong> ser\u00e1 o script de provisionamento que ser\u00e1 executado quando o cont\u00eainer for implantado.<\/p>\n

Abra o\u00a0configure.sh<\/strong> e inclua o seguinte:<\/p>\n

set -m\r\n\r\n\/entrypoint.sh couchbase-server &\r\n\r\nsleep 15\r\n\r\ncurl -v -X POST https:\/\/127.0.0.1:8091\/pools\/default -d memoryQuota=512 -d indexMemoryQuota=512\r\n\r\ncurl -v https:\/\/127.0.0.1:8091\/node\/controller\/setupServices -d services=kv%2cn1ql%2Cindex\r\n\r\ncurl -v https:\/\/127.0.0.1:8091\/settings\/web -d port=8091 -d username=$COUCHBASE_ADMINISTRATOR_USERNAME -d password=$COUCHBASE_ADMINISTRATOR_PASSWORD\r\n\r\ncurl -i -u $COUCHBASE_ADMINISTRATOR_USERNAME:$COUCHBASE_ADMINISTRATOR_PASSWORD -X POST https:\/\/127.0.0.1:8091\/settings\/indexes -d 'storageMode=memory_optimized'\r\n\r\ncurl -v -u $COUCHBASE_ADMINISTRATOR_USERNAME:$COUCHBASE_ADMINISTRATOR_PASSWORD -X POST https:\/\/127.0.0.1:8091\/pools\/default\/buckets -d name=$COUCHBASE_BUCKET -d bucketType=couchbase -d ramQuotaMB=128 -d authType=sasl -d saslPassword=$COUCHBASE_BUCKET_PASSWORD\r\n\r\nsleep 15\r\n\r\ncurl -v https:\/\/127.0.0.1:8093\/query\/service -d \"statement=CREATE PRIMARY INDEX ON \\`$COUCHBASE_BUCKET\\`\"\r\n\r\nfg 1<\/pre>\n
O Couchbase pode ser configurado por HTTP ap\u00f3s a implanta\u00e7\u00e3o.  Nosso script de configura\u00e7\u00e3o especificar\u00e1 os recursos da inst\u00e2ncia, as credenciais administrativas, um Bucket e um \u00edndice prim\u00e1rio.  Voc\u00ea notar\u00e1 que diversas vari\u00e1veis s\u00e3o usadas, como\u00a0$COUCHBASE_ADMINISTRATIVE_USERNAME<\/code> e\u00a0$COUCHBASE_BUCKET<\/code>.  Elas podem ser passadas em tempo de execu\u00e7\u00e3o, evitando que tenhamos que codificar informa\u00e7\u00f5es confidenciais.<\/p>\n
Mais informa\u00e7\u00f5es sobre o provisionamento de um cont\u00eainer do Couchbase via HTTP podem ser vistas em um Artigo anterior<\/a> que escrevi sobre o assunto.<\/p>\n
Com o script de provisionamento conclu\u00eddo, temos que terminar o script\u00a0Dockerfile<\/strong> arquivo.  Abra-o e inclua o seguinte:<\/p>\n
DE couchbase\r\n\r\nCOPIAR configure.sh \/opt\/couchbase\r\n\r\nCMD [\"\/opt\/couchbase\/configure.sh\"]<\/pre>\n
A imagem personalizada do Docker usar\u00e1 a imagem oficial do Docker como base, copiar\u00e1 nosso script de provisionamento durante o processo de compila\u00e7\u00e3o e o executar\u00e1 em tempo de execu\u00e7\u00e3o.<\/p>\n
Para criar a imagem personalizada para o Couchbase, execute o seguinte:<\/p>\n
docker build -t couchbase-custom \/path\/to\/directory\/with\/dockerfile<\/pre>\n
No comando acima\u00a0couchbase-custom<\/code> \u00e9 o nome da imagem e \u00e9 criado a partir do caminho que cont\u00e9m o\u00a0Dockerfile<\/strong> arquivo.<\/p>\n
Desenvolvimento de uma API RESTful do Spring Boot com Java<\/h2>\n
Antes de podermos colocar nosso aplicativo Java em um cont\u00eainer, precisamos cri\u00e1-lo.  Como estamos usando o Spring Boot, precisamos fazer download de um projeto inicial.  Isso pode ser feito facilmente na se\u00e7\u00e3o Inicializa\u00e7\u00e3o do Spring<\/a> site.<\/p>\n
\"Spring<\/p>\n
Para este projeto, estou usando\u00a0com.couchbase<\/code> como meu\u00a0grupo<\/strong> e\u00a0doca<\/code> como meu\u00a0artefato<\/strong>.  Tamb\u00e9m prefiro o Gradle, portanto, estou usando-o em vez do Maven.<\/p>\n
Extraia o projeto baixado e abra o arquivo\u00a0src\/main\/resources\/application.properties<\/strong> arquivo.  Nesse arquivo, inclua o seguinte:<\/p>\n
couchbase_host=couchbase\r\ncouchbase_bucket=default\r\ncouchbase_bucket_password=<\/pre>\n
No exemplo acima, estamos assumindo que nossa inst\u00e2ncia de host se chama\u00a0couchbase<\/code> e tem um Bucket sem senha chamado\u00a0padr\u00e3o<\/code>.  Se voc\u00ea estivesse testando localmente, o host provavelmente seria localhost.  De qualquer forma, todas essas propriedades ser\u00e3o definidas no tempo de execu\u00e7\u00e3o do cont\u00eainer por meio de vari\u00e1veis de ambiente.<\/p>\n
Agora, abra o arquivo\u00a0src\/main\/java\/com\/couchbase\/DockerApplication.java<\/strong> arquivo.  Aqui, carregaremos nossas propriedades e definiremos nossos pontos de extremidade.  Abra esse arquivo e inclua o seguinte c\u00f3digo Java:<\/p>\n
package com.couchbase;\r\n\r\nimport com.couchbase.client.java.Bucket;\r\nimport com.couchbase.client.java.Cluster;\r\nimport com.couchbase.client.java.CouchbaseCluster;\r\nimport com.couchbase.client.java.query.*;\r\nimport com.couchbase.client.java.query.consistency.ScanConsistency;\r\nimport com.couchbase.client.java.document.json.JsonObject;\r\nimport com.couchbase.client.java.document.JsonDocument;\r\nimport org.springframework.beans.factory.annotation.Value;\r\nimport org.springframework.boot.SpringApplication;\r\nimport org.springframework.boot.autoconfigure.*;\r\nimport org.springframework.context.annotation.*;\r\nimport org.springframework.http.*;\r\nimport org.springframework.web.bind.annotation.*;\r\nimport javax.servlet.*;\r\nimport javax.servlet.http.HttpServletResponse;\r\nimport java.util.*;\r\nimport java.util.concurrent.TimeUnit;\r\n\r\n@SpringBootApplication\r\n@RestController\r\n@RequestMapping(\"\/\")\r\npublic class DockerApplication {\r\n\r\n    @Value(\"${couchbase_host}\")\r\n    private String hostname;\r\n\r\n    @Value(\"${couchbase_bucket}\")\r\n    private String bucket;\r\n\r\n    @Value(\"${couchbase_bucket_password}\")\r\n    private String password;\r\n\r\n    public @Bean\r\n    Cluster cluster() {\r\n        return CouchbaseCluster.create(hostname);\r\n    }\r\n\r\n    public @Bean\r\n    Bucket bucket() {\r\n        return cluster().openBucket(bucket, password);\r\n    }\r\n\r\n    @RequestMapping(value=\"\/\", method= RequestMethod.GET)\r\n    public String root() {\r\n        return \"Try visiting the `\/get` or `\/save` endpoints\";\r\n    }\r\n\r\n\r\n    @RequestMapping(value=\"\/get\", method= RequestMethod.GET)\r\n    public Object get() {\r\n        String query = \"SELECT `\" + bucket().name() + \"`.* FROM `\" + bucket().name() + \"`\";\r\n        return bucket().async().query(N1qlQuery.simple(query, N1qlParams.build().consistency(ScanConsistency.REQUEST_PLUS)))\r\n                .flatMap(AsyncN1qlQueryResult::rows)\r\n                .map(result -> result.value().toMap())\r\n                .toList()\r\n                .timeout(10, TimeUnit.SECONDS)\r\n                .toBlocking()\r\n                .single();\r\n    }\r\n\r\n    @RequestMapping(value=\"\/save\", method=RequestMethod.POST)\r\n    public Object save(@RequestBody String json) {\r\n        JsonObject jsonData = JsonObject.fromJson(json);\r\n        JsonDocument document = JsonDocument.create(UUID.randomUUID().toString(), jsonData);\r\n        bucket().insert(document);\r\n        return new ResponseEntity<String>(json, HttpStatus.OK);\r\n    }\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tSpringApplication.run(DockerApplication.class, args);\r\n\t}\r\n}<\/pre>\n
N\u00e3o est\u00e1 acontecendo muita coisa no trecho acima.  Grande parte \u00e9 c\u00f3digo padr\u00e3o e declara\u00e7\u00f5es de importa\u00e7\u00e3o.  Como o objetivo deste artigo n\u00e3o \u00e9 usar Java com o Couchbase, n\u00e3o explicarei cada parte do c\u00f3digo.  Em vez disso, saiba que ele tem tr\u00eas pontos de extremidade, um dos quais obter\u00e1 todos os documentos no Bucket e um dos quais salvar\u00e1 novos documentos no Couchbase.<\/p>\n
Se voc\u00ea estiver usando o Gradle, como eu, precisar\u00e1 alterar o\u00a0build.gradle<\/strong> arquivo.  Ele precisa ter uma tarefa criada e depend\u00eancias adicionadas.  Suas\u00a0build.gradle<\/strong> O arquivo deve ter a seguinte apar\u00eancia:<\/p>\n
buildscript {\r\n\text {\r\n\t\tspringBootVersion = '1.5.2.RELEASE'\r\n\t}\r\n\trepositories {\r\n\t\tmavenCentral()\r\n\t}\r\n\tdependencies {\r\n\t\tclasspath(\"org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}\")\r\n\t}\r\n}\r\n\r\napply plugin: 'java'\r\napply plugin: 'eclipse'\r\napply plugin: 'org.springframework.boot'\r\n\r\nversion = '0.0.1-SNAPSHOT'\r\nsourceCompatibility = 1.8\r\n\r\nrepositories {\r\n\tmavenCentral()\r\n}\r\n\r\n\r\ndependencies {\r\n    compile('org.springframework.boot:spring-boot-starter-web')\r\n\tcompile('org.springframework:spring-tx')\r\n\tcompile('org.springframework.security:spring-security-core')\r\n\tcompile('com.couchbase.client:java-client')\r\n\ttestCompile('org.springframework.boot:spring-boot-starter-test')\r\n}\r\n\r\ntask(run, dependsOn: 'classes', type: JavaExec) {\r\n    main = 'com.couchbase.DockerApplication'\r\n    classpath = sourceSets.main.runtimeClasspath\r\n}<\/pre>\n
Para criar o aplicativo, execute o seguinte:<\/p>\n
gradle build -x test<\/pre>\n
Agora voc\u00ea ter\u00e1 um arquivo JAR para ser usado em nossa imagem do Docker.<\/p>\n
Criar uma imagem personalizada do Docker para o aplicativo Spring Boot<\/h2>\n
A cria\u00e7\u00e3o de uma imagem personalizada exigir\u00e1 que tenhamos um\u00a0Dockerfile<\/strong> no lugar.  Na base de seu projeto Java, adicione um arquivo\u00a0Dockerfile<\/strong> e inclua o seguinte:<\/p>\n
FROM openjdk:8\r\n\r\nCOPY .\/build\/libs\/java-project-0.0.1-SNAPSHOT.jar spring-boot.jar\r\n\r\nCMD java -jar spring-boot.jar<\/pre>\n
No exemplo acima, estamos usando a imagem oficial do OpenJDK como base e estamos copiando nosso JAR para a imagem no momento da compila\u00e7\u00e3o.  Na implanta\u00e7\u00e3o, o JAR \u00e9 executado.<\/p>\n
Para criar essa imagem, execute o seguinte:<\/p>\n
docker build -t spring-boot-custom \/path\/to\/directory\/with\/dockerfile<\/pre>\n
O comando acima deve parecer familiar.  Estamos criando um\u00a0bota de mola personalizada<\/code> usando o blueprint encontrado no diret\u00f3rio do nosso\u00a0Dockerfile<\/strong> arquivo.<\/p>\n
Para obter mais informa\u00e7\u00f5es sobre a cria\u00e7\u00e3o de imagens personalizadas do Docker, consulte um artigo anterior que escrevi chamado, Crie uma imagem personalizada do Docker para seu aplicativo da Web em cont\u00eainer<\/a>.<\/p>\n
Implanta\u00e7\u00e3o das imagens do Couchbase e do Spring Boot como cont\u00eaineres<\/h2>\n
H\u00e1 algumas op\u00e7\u00f5es quando se trata de implementar nossas imagens.  Podemos usar um arquivo Compose ou implement\u00e1-las como cont\u00eaineres vanilla.  Acho que o Compose \u00e9 uma abordagem mais limpa, portanto, vamos us\u00e1-lo.<\/p>\n
Em algum lugar de seu computador, crie um arquivo\u00a0docker-compose.yml<\/strong> e inclua o seguinte:<\/p>\n
version: '2'\r\n\r\nservices:\r\n    couchbase:\r\n        image: couchbase-custom\r\n        ports:\r\n            - 8091:8091\r\n            - 8092:8092\r\n            - 8093:8093\r\n        environment:\r\n            - COUCHBASE_ADMINISTRATOR_USERNAME=Administrator\r\n            - COUCHBASE_ADMINISTRATOR_PASSWORD=password\r\n            - COUCHBASE_BUCKET=default\r\n            - COUCHBASE_BUCKET_PASSWORD=\r\n\r\n    spring-boot:\r\n        image: spring-boot-custom\r\n        ports:\r\n            - 8080:8080\r\n        environment:\r\n            - COUCHBASE_HOST=couchbase\r\n            - COUCHBASE_BUCKET=default\r\n            - COUCHBASE_BUCKET_PASSWORD=\r\n        restart: always<\/pre>\n
No arquivo acima, estamos definindo as imagens personalizadas que criamos e estamos fazendo o mapeamento de portas para a m\u00e1quina host.  O que \u00e9 particularmente interessante \u00e9 a se\u00e7\u00e3o\u00a0ambiente<\/code> op\u00e7\u00f5es.  Elas correspondem \u00e0s vari\u00e1veis que temos em nosso\u00a0application.properties<\/strong> e\u00a0configure.sh<\/strong> arquivos.<\/p>\n
Para implementar nossos cont\u00eaineres com o Compose, execute o seguinte:<\/p>\n
docker-compose run -d --service-ports --name couchbase couchbase\r\ndocker-compose run -d --service-ports --name spring-boot spring-boot<\/pre>\n
Algo a ser observado sobre os comandos acima.  O Couchbase n\u00e3o \u00e9 implantado instantaneamente.  Voc\u00ea precisar\u00e1 esperar at\u00e9 que ele seja completamente iniciado antes de implantar o aplicativo Java.  Depois que os dois aplicativos forem iniciados, verifique-os navegando at\u00e9 o aplicativo Java em seu navegador da Web.<\/p>\n
Conclus\u00e3o<\/h2>\n
Voc\u00ea acabou de ver como criar Docker<\/a> para um aplicativo Spring Boot e um servidor Couchbase.  Ap\u00f3s a implanta\u00e7\u00e3o de cada um como cont\u00eaineres, eles poder\u00e3o se comunicar entre si, o que \u00e9 extremamente conveniente para a manuten\u00e7\u00e3o.<\/p>\n
Se voc\u00ea estiver interessado em ver isso feito com o Node.js, confira o Artigo anterior<\/a> Escrevi sobre o assunto.  Se voc\u00ea estiver interessado em saber mais sobre o Java SDK para o Couchbase, consulte o Portal do desenvolvedor do Couchbase<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"
Not too long ago I wrote about containerizing a Node.js RESTful API and Couchbase Server to demonstrate how easy it is to deploy web applications in a quick and reliable fashion. \u00a0In that guide we created a simple API, built […]<\/p>","protected":false},"author":63,"featured_media":13873,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1815,1816,1818],"tags":[1897,1520,1519,1776],"ppma_author":[9032],"class_list":["post-2986","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-best-practices-and-tutorials","category-couchbase-server","category-java","tag-containerized","tag-containers","tag-docker","tag-web-application"],"acf":[],"yoast_head":"\nUse Docker to Deploy a Containerized Java with Couchbase Web Application<\/title>\n<meta name=\"description\" content=\"Learn how to deploy a containerized Java RESTful API and Couchbase NoSQL database using Docker and custom, hand-crafted, images.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/pt\/docker-deploy-containerized-java-couchbase-web-application\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Use Docker to Deploy a Containerized Java with Couchbase Web Application\" \/>\n<meta property=\"og:description\" content=\"Learn how to deploy a containerized Java RESTful API and Couchbase NoSQL database using Docker and custom, hand-crafted, images.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.couchbase.com\/blog\/pt\/docker-deploy-containerized-java-couchbase-web-application\/\" \/>\n<meta property=\"og:site_name\" content=\"The Couchbase Blog\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/thepolyglotdeveloper\" \/>\n<meta property=\"article:published_time\" content=\"2017-04-18T12:00:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-07-21T07:41:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2017\/03\/spring-boot-initializr.png\" \/>\n<meta name=\"author\" content=\"Nic Raboy, Developer Advocate, Couchbase\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@nraboy\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nic Raboy, Developer Advocate, Couchbase\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" 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