Introduction
This guide shows you workflow examples that configure a service container using the Docker Hub redis
image. The workflow runs a script to create a Redis client and populate the client with data. To test that the workflow creates and populates the Redis client, the script prints the client's data to the console.
Remarque
Si vos flux de travail utilisent des actions de conteneurs Docker, des conteneurs de tâches ou des conteneurs de services, vous devez utiliser un programme d'exécution Linux :
- Si vous utilisez des exécuteurs hébergés sur GitHub, vous devez utiliser un exécuteur Ubuntu.
- Si vous utilisez des exécuteurs autohébergés, vous devez utiliser une machine Linux en tant qu’exécuteur, et Docker doit être installé.
Prerequisites
Vous devez connaître le fonctionnement des conteneurs de service avec GitHub Actions et les différences de réseau entre une exécution directe des travaux sur l’exécuteur ou dans un conteneur. Pour plus d’informations, consultez « À propos des conteneurs de service ».
You may also find it helpful to have a basic understanding of YAML, the syntax for GitHub Actions, and Redis. For more information, see:
- Writing workflows
- Getting Started with Redis in the Redis documentation
Running jobs in containers
La configuration de travaux à exécuter dans un conteneur simplifie la mise en réseau des configurations entre le travail et les conteneurs de service. Les conteneurs Docker d’un même réseau de pont défini par l’utilisateur exposent tous les ports les uns aux autres. Vous n’avez donc pas besoin de mapper les ports des conteneurs de service à l’hôte Docker. Vous pouvez accéder au conteneur de service à partir du conteneur de travaux à l’aide de l’étiquette que vous configurez dans le workflow.
Vous pouvez copier ce fichier de workflow dans le répertoire .github/workflows
de votre dépôt et le modifier selon vos besoins.
name: Redis container example on: push jobs: # Label of the container job container-job: # Containers must run in Linux based operating systems runs-on: ubuntu-latest # Docker Hub image that `container-job` executes in container: node:20-bookworm-slim # Service containers to run with `container-job` services: # Label used to access the service container redis: # Docker Hub image image: redis # Set health checks to wait until redis has started options: >- --health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5 steps: # Downloads a copy of the code in your repository before running CI tests - name: Check out repository code uses: actions/checkout@v4 # Performs a clean installation of all dependencies in the `package.json` file # For more information, see http://docs.npmjs.com/cli/ci.html - name: Install dependencies run: npm ci - name: Connect to Redis # Runs a script that creates a Redis client, populates # the client with data, and retrieves data run: node client.js # Environment variable used by the `client.js` script to create a new Redis client. env: # The hostname used to communicate with the Redis service container REDIS_HOST: redis # The default Redis port REDIS_PORT: 6379
name: Redis container example
on: push
jobs:
# Label of the container job
container-job:
# Containers must run in Linux based operating systems
runs-on: ubuntu-latest
# Docker Hub image that `container-job` executes in
container: node:20-bookworm-slim
# Service containers to run with `container-job`
services:
# Label used to access the service container
redis:
# Docker Hub image
image: redis
# Set health checks to wait until redis has started
options: >-
--health-cmd "redis-cli ping"
--health-interval 10s
--health-timeout 5s
--health-retries 5
steps:
# Downloads a copy of the code in your repository before running CI tests
- name: Check out repository code
uses: actions/checkout@v4
# Performs a clean installation of all dependencies in the `package.json` file
# For more information, see http://docs.npmjs.com/cli/ci.html
- name: Install dependencies
run: npm ci
- name: Connect to Redis
# Runs a script that creates a Redis client, populates
# the client with data, and retrieves data
run: node client.js
# Environment variable used by the `client.js` script to create a new Redis client.
env:
# The hostname used to communicate with the Redis service container
REDIS_HOST: redis
# The default Redis port
REDIS_PORT: 6379
Configuring the container job
Ce flux de travail configure un travail qui s'exécute dans le conteneur node:20-bookworm-slim
et utilise l'exécuteur ubuntu-latest
GitHub-hosted comme hôte Docker pour le conteneur. Pour plus d’informations sur le conteneur node:20-bookworm-slim
, consultez l’image node sur Docker Hub.
Le workflow configure un conteneur de service avec l’étiquette redis
. Tous les services devant s’exécuter dans un conteneur, chaque service exige que vous spécifiiez le conteneur image
. Cet exemple utilise l’image conteneur redis
et inclut des options de vérification de l’intégrité pour s’assurer que le service est en cours d’exécution. Ajoutez une étiquette au nom de l’image qui spécifie une version, par exemple redis:6
. Pour plus d’informations, consultez image redis sur Docker Hub.
jobs: # Label of the container job container-job: # Containers must run in Linux based operating systems runs-on: ubuntu-latest # Docker Hub image that `container-job` executes in container: node:20-bookworm-slim # Service containers to run with `container-job` services: # Label used to access the service container redis: # Docker Hub image image: redis # Set health checks to wait until redis has started options: >- --health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5
jobs:
# Label of the container job
container-job:
# Containers must run in Linux based operating systems
runs-on: ubuntu-latest
# Docker Hub image that `container-job` executes in
container: node:20-bookworm-slim
# Service containers to run with `container-job`
services:
# Label used to access the service container
redis:
# Docker Hub image
image: redis
# Set health checks to wait until redis has started
options: >-
--health-cmd "redis-cli ping"
--health-interval 10s
--health-timeout 5s
--health-retries 5
Configuring the steps for the container job
Le workflow effectue les étapes suivantes :
- Il extrait le dépôt sur l’exécuteur.
- Il installe des dépendances.
- Il exécute un script pour créer un client.
steps: # Downloads a copy of the code in your repository before running CI tests - name: Check out repository code uses: actions/checkout@v4 # Performs a clean installation of all dependencies in the `package.json` file # For more information, see http://docs.npmjs.com/cli/ci.html - name: Install dependencies run: npm ci - name: Connect to Redis # Runs a script that creates a Redis client, populates # the client with data, and retrieves data run: node client.js # Environment variable used by the `client.js` script to create a new Redis client. env: # The hostname used to communicate with the Redis service container REDIS_HOST: redis # The default Redis port REDIS_PORT: 6379
steps:
# Downloads a copy of the code in your repository before running CI tests
- name: Check out repository code
uses: actions/checkout@v4
# Performs a clean installation of all dependencies in the `package.json` file
# For more information, see http://docs.npmjs.com/cli/ci.html
- name: Install dependencies
run: npm ci
- name: Connect to Redis
# Runs a script that creates a Redis client, populates
# the client with data, and retrieves data
run: node client.js
# Environment variable used by the `client.js` script to create a new Redis client.
env:
# The hostname used to communicate with the Redis service container
REDIS_HOST: redis
# The default Redis port
REDIS_PORT: 6379
Le script client.js recherche les variables d’environnement REDIS_HOST
et REDIS_PORT
pour créer le client. Le workflow définit ces deux variables d’environnement dans le cadre de l’étape « Se connecter à Redis » pour les rendre disponibles pour le script client.js. Pour plus d’informations sur le script, consultez Test du conteneur de service Redis.
The hostname of the Redis service is the label you configured in your workflow, in this case, redis
. Because Docker containers on the same user-defined bridge network open all ports by default, you'll be able to access the service container on the default Redis port 6379.
Running jobs directly on the runner machine
When you run a job directly on the runner machine, you'll need to map the ports on the service container to ports on the Docker host. You can access service containers from the Docker host using localhost
and the Docker host port number.
Vous pouvez copier ce fichier de workflow dans le répertoire .github/workflows
de votre dépôt et le modifier selon vos besoins.
name: Redis runner example on: push jobs: # Label of the runner job runner-job: # You must use a Linux environment when using service containers or container jobs runs-on: ubuntu-latest # Service containers to run with `runner-job` services: # Label used to access the service container redis: # Docker Hub image image: redis # Set health checks to wait until redis has started options: >- --health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5 ports: # Maps port 6379 on service container to the host - 6379:6379 steps: # Downloads a copy of the code in your repository before running CI tests - name: Check out repository code uses: actions/checkout@v4 # Performs a clean installation of all dependencies in the `package.json` file # For more information, see http://docs.npmjs.com/cli/ci.html - name: Install dependencies run: npm ci - name: Connect to Redis # Runs a script that creates a Redis client, populates # the client with data, and retrieves data run: node client.js # Environment variable used by the `client.js` script to create # a new Redis client. env: # The hostname used to communicate with the Redis service container REDIS_HOST: localhost # The default Redis port REDIS_PORT: 6379
name: Redis runner example
on: push
jobs:
# Label of the runner job
runner-job:
# You must use a Linux environment when using service containers or container jobs
runs-on: ubuntu-latest
# Service containers to run with `runner-job`
services:
# Label used to access the service container
redis:
# Docker Hub image
image: redis
# Set health checks to wait until redis has started
options: >-
--health-cmd "redis-cli ping"
--health-interval 10s
--health-timeout 5s
--health-retries 5
ports:
# Maps port 6379 on service container to the host
- 6379:6379
steps:
# Downloads a copy of the code in your repository before running CI tests
- name: Check out repository code
uses: actions/checkout@v4
# Performs a clean installation of all dependencies in the `package.json` file
# For more information, see http://docs.npmjs.com/cli/ci.html
- name: Install dependencies
run: npm ci
- name: Connect to Redis
# Runs a script that creates a Redis client, populates
# the client with data, and retrieves data
run: node client.js
# Environment variable used by the `client.js` script to create
# a new Redis client.
env:
# The hostname used to communicate with the Redis service container
REDIS_HOST: localhost
# The default Redis port
REDIS_PORT: 6379
Configuring the runner job
L'exemple s'appuie sur l'exécuteur ubuntu-latest
GitHub-hosted en tant qu'hôte Docker.
Le workflow configure un conteneur de service avec l’étiquette redis
. Tous les services devant s’exécuter dans un conteneur, chaque service exige que vous spécifiiez le conteneur image
. Cet exemple utilise l’image conteneur redis
et inclut des options de vérification de l’intégrité pour s’assurer que le service est en cours d’exécution. Ajoutez une étiquette au nom de l’image qui spécifie une version, par exemple redis:6
. Pour plus d’informations, consultez image redis sur Docker Hub.
The workflow maps port 6379 on the Redis service container to the Docker host. For more information about the ports
keyword, see À propos des conteneurs de service.
jobs: # Label of the runner job runner-job: # You must use a Linux environment when using service containers or container jobs runs-on: ubuntu-latest # Service containers to run with `runner-job` services: # Label used to access the service container redis: # Docker Hub image image: redis # Set health checks to wait until redis has started options: >- --health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5 ports: # Maps port 6379 on service container to the host - 6379:6379
jobs:
# Label of the runner job
runner-job:
# You must use a Linux environment when using service containers or container jobs
runs-on: ubuntu-latest
# Service containers to run with `runner-job`
services:
# Label used to access the service container
redis:
# Docker Hub image
image: redis
# Set health checks to wait until redis has started
options: >-
--health-cmd "redis-cli ping"
--health-interval 10s
--health-timeout 5s
--health-retries 5
ports:
# Maps port 6379 on service container to the host
- 6379:6379
Configuring the steps for the runner job
Le workflow effectue les étapes suivantes :
- Il extrait le dépôt sur l’exécuteur.
- Il installe des dépendances.
- Il exécute un script pour créer un client.
steps: # Downloads a copy of the code in your repository before running CI tests - name: Check out repository code uses: actions/checkout@v4 # Performs a clean installation of all dependencies in the `package.json` file # For more information, see http://docs.npmjs.com/cli/ci.html - name: Install dependencies run: npm ci - name: Connect to Redis # Runs a script that creates a Redis client, populates # the client with data, and retrieves data run: node client.js # Environment variable used by the `client.js` script to create # a new Redis client. env: # The hostname used to communicate with the Redis service container REDIS_HOST: localhost # The default Redis port REDIS_PORT: 6379
steps:
# Downloads a copy of the code in your repository before running CI tests
- name: Check out repository code
uses: actions/checkout@v4
# Performs a clean installation of all dependencies in the `package.json` file
# For more information, see http://docs.npmjs.com/cli/ci.html
- name: Install dependencies
run: npm ci
- name: Connect to Redis
# Runs a script that creates a Redis client, populates
# the client with data, and retrieves data
run: node client.js
# Environment variable used by the `client.js` script to create
# a new Redis client.
env:
# The hostname used to communicate with the Redis service container
REDIS_HOST: localhost
# The default Redis port
REDIS_PORT: 6379
Le script client.js recherche les variables d’environnement REDIS_HOST
et REDIS_PORT
pour créer le client. Le workflow définit ces deux variables d’environnement dans le cadre de l’étape « Se connecter à Redis » pour les rendre disponibles pour le script client.js. Pour plus d’informations sur le script, consultez Test du conteneur de service Redis.
Le nom d’hôte est localhost
ou 127.0.0.1
.
Testing the Redis service container
You can test your workflow using the following script, which creates a Redis client and populates the client with some placeholder data. The script then prints the values stored in the Redis client to the terminal. Your script can use any language you'd like, but this example uses Node.js and the redis
npm module. For more information, see the npm redis module.
You can modify client.js to include any Redis operations needed by your workflow. In this example, the script creates the Redis client instance, adds placeholder data, then retrieves the data.
Ajoutez un nouveau fichier appelé client.js à votre dépôt avec le code suivant.
const redis = require("redis"); // Creates a new Redis client // If REDIS_HOST is not set, the default host is localhost // If REDIS_PORT is not set, the default port is 6379 const redisClient = redis.createClient({ url: `redis://${process.env.REDIS_HOST}:${process.env.REDIS_PORT}` }); redisClient.on("error", (err) => console.log("Error", err)); (async () => { await redisClient.connect(); // Sets the key "octocat" to a value of "Mona the octocat" const setKeyReply = await redisClient.set("octocat", "Mona the Octocat"); console.log("Reply: " + setKeyReply); // Sets a key to "species", field to "octocat", and "value" to "Cat and Octopus" const SetFieldOctocatReply = await redisClient.hSet("species", "octocat", "Cat and Octopus"); console.log("Reply: " + SetFieldOctocatReply); // Sets a key to "species", field to "dinotocat", and "value" to "Dinosaur and Octopus" const SetFieldDinotocatReply = await redisClient.hSet("species", "dinotocat", "Dinosaur and Octopus"); console.log("Reply: " + SetFieldDinotocatReply); // Sets a key to "species", field to "robotocat", and "value" to "Cat and Robot" const SetFieldRobotocatReply = await redisClient.hSet("species", "robotocat", "Cat and Robot"); console.log("Reply: " + SetFieldRobotocatReply); try { // Gets all fields in "species" key const replies = await redisClient.hKeys("species"); console.log(replies.length + " replies:"); replies.forEach((reply, i) => { console.log(" " + i + ": " + reply); }); await redisClient.quit(); } catch (err) { // statements to handle any exceptions } })();
const redis = require("redis");
// Creates a new Redis client
// If REDIS_HOST is not set, the default host is localhost
// If REDIS_PORT is not set, the default port is 6379
const redisClient = redis.createClient({
url: `redis://${process.env.REDIS_HOST}:${process.env.REDIS_PORT}`
});
redisClient.on("error", (err) => console.log("Error", err));
(async () => {
await redisClient.connect();
// Sets the key "octocat" to a value of "Mona the octocat"
const setKeyReply = await redisClient.set("octocat", "Mona the Octocat");
console.log("Reply: " + setKeyReply);
// Sets a key to "species", field to "octocat", and "value" to "Cat and Octopus"
const SetFieldOctocatReply = await redisClient.hSet("species", "octocat", "Cat and Octopus");
console.log("Reply: " + SetFieldOctocatReply);
// Sets a key to "species", field to "dinotocat", and "value" to "Dinosaur and Octopus"
const SetFieldDinotocatReply = await redisClient.hSet("species", "dinotocat", "Dinosaur and Octopus");
console.log("Reply: " + SetFieldDinotocatReply);
// Sets a key to "species", field to "robotocat", and "value" to "Cat and Robot"
const SetFieldRobotocatReply = await redisClient.hSet("species", "robotocat", "Cat and Robot");
console.log("Reply: " + SetFieldRobotocatReply);
try {
// Gets all fields in "species" key
const replies = await redisClient.hKeys("species");
console.log(replies.length + " replies:");
replies.forEach((reply, i) => {
console.log(" " + i + ": " + reply);
});
await redisClient.quit();
}
catch (err) {
// statements to handle any exceptions
}
})();
The script creates a new Redis client using the createClient
method, which accepts a host
and port
parameter. The script uses the REDIS_HOST
and REDIS_PORT
environment variables to set the client's IP address and port. If host
and port
are not defined, the default host is localhost
and the default port is 6379.
The script uses the set
and hset
methods to populate the database with some keys, fields, and values. To confirm that the Redis client contains the data, the script prints the contents of the database to the console log.
When you run this workflow, you should see the following output in the "Connect to Redis" step confirming you created the Redis client and added data:
Reply: OK
Reply: 1
Reply: 1
Reply: 1
3 replies:
0: octocat
1: dinotocat
2: robotocat