{"id":12539,"date":"2020-01-14T00:34:08","date_gmt":"2020-01-13T22:34:08","guid":{"rendered":"https:\/\/www.datanovia.com\/en\/?post_type=dt_lessons&#038;p=12539"},"modified":"2020-01-14T00:34:08","modified_gmt":"2020-01-13T22:34:08","slug":"docker-compose-attendre-que-le-conteneur-postgres-soit-pret","status":"publish","type":"dt_lessons","link":"https:\/\/www.datanovia.com\/en\/fr\/lessons\/forcer-docker-compose-a-attendre-un-conteneur-en-utilisant-loutil-wait\/docker-compose-attendre-que-le-conteneur-postgres-soit-pret\/","title":{"rendered":"Docker Compose: Attendre que le Conteneur Postgres soit Pr\u00eat"},"content":{"rendered":"<div id=\"rdoc\">\n<p>Cet article fournit un exemple pour <strong>faire en sorte que docker-compose attende le conteneur Postgres<\/strong> ou <strong>Postgresql<\/strong> avant de lancer un autre conteneur d\u2019application docker d\u00e9pendant. Nous allons utiliser l\u2019outil <a href=\"https:\/\/github.com\/ufoscout\/docker-compose-wait\">docker-compose-wait<\/a>, qui est un petit utilitaire en ligne de commande permettant d\u2019attendre un nombre fixe de secondes et\/ou d\u2019attendre qu\u2019un port TCP soit ouvert sur une image cible.<\/p>\n<p>Vous devez ajouter l\u2019outil docker-compose-wait dans le Dockerfile de votre application.<\/p>\n<p>Sommaire:<\/p>\n<div id=\"TOC\">\n<ul>\n<li><a href=\"#demarrage-rapide\">D\u00e9marrage rapide<\/a><\/li>\n<li><a href=\"#etape-0-telecharger-un-modele\">Etape 0 : T\u00e9l\u00e9charger un mod\u00e8le<\/a><\/li>\n<li><a href=\"#etape-1-ajouter-loutil-docker-compose-wait-au-dockerfile-de-votre-application\">Etape 1 : Ajouter l\u2019outil docker-compose-wait au Dockerfile de votre application<\/a><\/li>\n<li><a href=\"#etape-2-modifiez-votre-fichier-docker-compose.yml\">Etape 2 : Modifiez votre fichier docker-compose.yml<\/a><\/li>\n<li><a href=\"#etape-3-creer-et-executer-votre-application\">Etape 3 : Cr\u00e9er et ex\u00e9cuter votre application<\/a><\/li>\n<li><a href=\"#etape-4-arret-des-conteneurs-et-nettoyage\">Etape 4 : Arr\u00eat des conteneurs et nettoyage<\/a><\/li>\n<li><a href=\"#resume\">R\u00e9sum\u00e9<\/a><\/li>\n<li><a href=\"#references\">R\u00e9f\u00e9rences<\/a><\/li>\n<\/ul>\n<\/div>\n<div id=\"demarrage-rapide\" class=\"section level2\">\n<h2>D\u00e9marrage rapide<\/h2>\n<pre class=\"bash\"><code># Download a template\r\ngit clone https:\/\/github.com\/kassambara\/docker-compose-wait-for-container.git\r\n\r\n# Build the demo application\r\ncd docker-compose-wait-for-container\/ex01-using-wait-tool\r\ndocker-compose build\r\n# Running your app\r\ndocker-compose run my_super_app\r\n\r\n# Stopping containers and cleaning\r\ndocker-compose down <\/code><\/pre>\n<\/div>\n<div id=\"etape-0-telecharger-un-modele\" class=\"section level2\">\n<h2>Etape 0 : T\u00e9l\u00e9charger un mod\u00e8le<\/h2>\n<pre class=\"bash\"><code># Download a template\r\ngit clone https:\/\/github.com\/kassambara\/docker-compose-wait-for-container.git\r\ncd docker-compose-wait-for-container\/ex02-using-wait-tool<\/code><\/pre>\n<p><strong>Structure de dossier de projet<\/strong>:<\/p>\n<pre><code>files\/docker-compose-wait-for-container\/ex01-using-wait-tool\r\n\u251c\u2500\u2500 docker-compose.yml\r\n\u2514\u2500\u2500 my_super_app\r\n    \u251c\u2500\u2500 Dockerfile\r\n    \u2514\u2500\u2500 sayhello<\/code><\/pre>\n<p>Contenu essentiel du projet:<\/p>\n<ul>\n<li><code>docker-compose.yml<\/code> pour g\u00e9rer tous les services de conteneurs<\/li>\n<li><code>my_super_app<\/code> scripts : mod\u00e8le Dockerfile pour construire votre application. Ici, cette application de d\u00e9mo vous demandera votre nom et vous f\u00e9licitera ensuite !<\/li>\n<\/ul>\n<\/div>\n<div id=\"etape-1-ajouter-loutil-docker-compose-wait-au-dockerfile-de-votre-application\" class=\"section level2\">\n<h2>Etape 1 : Ajouter l\u2019outil docker-compose-wait au Dockerfile de votre application<\/h2>\n<p>Exemple de Dockerfile utilisant l\u2019image <code>alpine<\/code>:<\/p>\n<pre class=\"dockerfile\"><code>FROM alpine:latest\r\n\r\n# Add hello scripts\r\nADD sayhello \/sayhello\r\nRUN chmod +x \/sayhello\r\n\r\n# Add docker-compose-wait tool -------------------\r\nENV WAIT_VERSION 2.7.2\r\nADD https:\/\/github.com\/ufoscout\/docker-compose-wait\/releases\/download\/$WAIT_VERSION\/wait \/wait\r\nRUN chmod +x \/wait\r\n\r\nCMD [\"\/sayhello\"]<\/code><\/pre>\n<\/div>\n<div id=\"etape-2-modifiez-votre-fichier-docker-compose.yml\" class=\"section level2\">\n<h2>Etape 2 : Modifiez votre fichier docker-compose.yml<\/h2>\n<pre class=\"yaml\"><code>version: '3.6'\r\nservices:\r\n  postgres:\r\n    image: \"postgres:9.4\"\r\n    hostname: postgres\r\n    ports:\r\n      - \"5432:5432\"\r\n\r\n  my_super_app:\r\n    build: .\/my_super_app\r\n    image: \"my_super_app:latest\"\r\n    container_name: my_supper_app\r\n    depends_on:\r\n      - postgres\r\n    command: sh -c \"\/wait &amp;&amp; \/sayhello\"\r\n    environment:\r\n      - WAIT_HOSTS=postgres:5432\r\n      - WAIT_HOSTS_TIMEOUT=300\r\n      - WAIT_SLEEP_INTERVAL=30\r\n      - WAIT_HOST_CONNECT_TIMEOUT=30<\/code><\/pre>\n<div class=\"success\">\n<ul>\n<li>La commande <code>sh -c \u201c\/wait &amp;&amp; \/sayhello\u201d<\/code> lancera l\u2019outil wait et ensuite votre application, ici \/sayhello.<\/li>\n<li>Pour que votre conteneur d\u2019application Docker <strong>attende plusieurs h\u00f4tes<\/strong>, la variable d\u2019environnement peut \u00eatre sp\u00e9cifi\u00e9e comme ceci par exemple <code>WAIT_HOSTS=postgres:5432, nginx:80<\/code><\/li>\n<\/ul>\n<\/div>\n<p><strong>Options de configuration suppl\u00e9mentaires<\/strong>. Le comportement de l\u2019utilitaire d\u2019attente peut \u00eatre configur\u00e9 avec les variables d\u2019environnement suivantes:<\/p>\n<ul>\n<li><em>WAIT_HOSTS<\/em> : liste s\u00e9par\u00e9e par des virgules des paires h\u00f4te:port pour lesquelles vous voulez attendre.<\/li>\n<li><em>WAIT_HOSTS_TIMEOUT<\/em> : nombre maximum de secondes d\u2019attente pour que tous les h\u00f4tes soient disponibles avant l\u2019\u00e9chec. La valeur par d\u00e9faut est de 30 secondes.<\/li>\n<li><em>WAIT_HOST_CONNECT_TIMEOUT<\/em> : Le d\u00e9lai d\u2019attente d\u2019une connexion TCP unique \u00e0 un h\u00f4te distant avant de tenter une nouvelle connexion. La valeur par d\u00e9faut est de 5 secondes.<\/li>\n<li><em>WAIT_BEFORE_HOSTS<\/em> : nombre de secondes \u00e0 attendre (sleep) avant de commencer \u00e0 v\u00e9rifier la disponibilit\u00e9 des h\u00f4tes<\/li>\n<li><em>WAIT_AFTER_HOSTS<\/em> : nombre de secondes \u00e0 attendre (sleep) une fois que tous les h\u00f4tes sont disponibles<\/li>\n<li><em>WAIT_SLEEP_INTERVAL<\/em> : nombre de secondes de sommeil entre deux tentatives. La valeur par d\u00e9faut est 1 seconde.<\/li>\n<\/ul>\n<\/div>\n<div id=\"etape-3-creer-et-executer-votre-application\" class=\"section level2\">\n<h2>Etape 3 : Cr\u00e9er et ex\u00e9cuter votre application<\/h2>\n<pre class=\"bash\"><code># Building your app\r\ncd docker-compose-wait-for-container\/ex01-using-wait-tool\r\ndocker-compose build\r\n# Running your app\r\ndocker-compose run my_super_app<\/code><\/pre>\n<p>Le log de sortie de la console ressemble \u00e0 ceci (exemple MySQL):<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/docker-compose-wait-for-container\/images\/docker-compose-wait-for-mysql-logs.png\" alt=\"Logs de l\u2019attente de docker compose\" \/><\/p>\n<div class=\"success\">\n<p>Apr\u00e8s avoir tap\u00e9 votre nom, vous verrez un message de f\u00e9licitations de my_super_app<\/p>\n<\/div>\n<\/div>\n<div id=\"etape-4-arret-des-conteneurs-et-nettoyage\" class=\"section level2\">\n<h2>Etape 4 : Arr\u00eat des conteneurs et nettoyage<\/h2>\n<pre class=\"bash\"><code>docker-compose down <\/code><\/pre>\n<\/div>\n<div id=\"resume\" class=\"section level2\">\n<h2>R\u00e9sum\u00e9<\/h2>\n<p>Cet article d\u00e9crit comment faire en sorte que docker compose attende Postgres ou Postgresql avec l\u2019outil docker-compose-wait.<\/p>\n<\/div>\n<div id=\"references\" class=\"section level2\">\n<h2>R\u00e9f\u00e9rences<\/h2>\n<ul>\n<li><a href=\"https:\/\/github.com\/ufoscout\/docker-compose-wait\">docker-compose-wait : Un simple script pour attendre que d\u2019autres images docker soient lanc\u00e9es pendant l\u2019utilisation de docker-compose<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><!--end rdoc--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fournit un exemple pour faire en sorte que docker-compose attende le conteneur Postgres ou Postgresql avant de lancer un autre conteneur d&rsquo;application docker d\u00e9pendant.<\/p>\n","protected":false},"author":1,"featured_media":12541,"parent":12533,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","class_list":["post-12539","dt_lessons","type-dt_lessons","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - 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