ShellScript to operate Laravel and Docker src. The app and db containers are managed by docker-compose. Composer (If it is not installed, it will be installed at setup time.) Operation confirmed environment. Docker for Mac must be installed.This quick-start guide demonstrates how to use Docker Compose to set up and run a simple Django/PostgreSQL app. Estimated reading time: 8 minutes. If you have used Docker Compose in development, you will have modernized and containerized your application by:Quickstart: Compose and Django. Since Apple stopped providing server-grade hardware, this has been on Mac.When building modern, stateless applications, containerizing your application’s components is the first step in deploying and scaling on distributed platforms. This sample Docker Compose file brings up a three-node Elasticsearch cluster.
This setup will use a DigitalOcean Kubernetes cluster, but you are free to create a cluster using another method. A Kubernetes 1.10+ cluster with role-based access control (RBAC) enabled. This setup will mirror the functionality of the code described in Containerizing a Node.js Application with Docker Compose and will be a good starting point to build out a production-ready solution that will scale with your needs. By the end of the tutorial, you will have a single-instance Node.js application with a MongoDB database running on a Kubernetes cluster. You will use the object definitions that kompose provides as a starting point and make adjustments to ensure that your setup will use Secrets, Services, and PersistentVolumeClaims in the way that Kubernetes expects. One tool that can speed up the translation process to Kubernetes is kompose, a conversion tool that helps developers move Compose workflows to container orchestrators like Kubernetes or OpenShift.In this tutorial, you will translate Compose services to Kubernetes objects using kompose. If you are working with Ubuntu 18.04, follow Steps 1 and 2 of How To Install and Use Docker on Ubuntu 18.04 otherwise, follow the official documentation for information about installing on other operating systems. Docker installed on your local machine or development server. You can read more about installing kubectl in the official documentation. Docker Compose Download The Latest/kompose /usr/local/bin/komposeTo verify that it has been installed properly, you can do a version check:If the installation was successful, you will see output like the following:With kompose installed and ready to use, you can now clone the Node.js project code that you will be translating to Kubernetes. curl -L 1.18.0/kompose-linux-amd64 -o komposeFor details about installing on non-Linux systems, please refer to the installation instructions. Paste this link into the following curl command to download the latest version of kompose: For an overview of how to set this up, refer to this introduction to Docker Hub.To begin using kompose, navigate to the project’s GitHub Releases page, and copy the link to the current release (version 1.18.0 as of this writing). Opera versus chrome osx 2017docker build -t your_dockerhub_username/ node-kubernetes. In this case, tag the image with your Docker Hub username and name it node-kubernetes or a name of your own choosing: Let’s build the image now so that you can push it to your Docker Hub account and use it in your Kubernetes setup.Using the docker build command, build the image with the -t flag, which allows you to tag it with a memorable name. It has been modernized to work with containers: sensitive and specific configuration information has been removed from the application code and refactored to be injected at runtime, and the application’s state has been offloaded to a MongoDB database.For more information about designing modern, stateless applications, please see Architecting Applications for Kubernetes and Modernizing Applications for Kubernetes.The project directory includes a Dockerfile with instructions for building the application image. You can find more information about the application itself in the series From Containers to Kubernetes with Node.js.Clone the repository into a directory called node_project:The node_project directory contains files and directories for a shark information application that works with user input. This repository includes the code from the setup described in Containerizing a Node.js Application for Development With Docker Compose, which uses a demo Node.js application to demonstrate how to set up a development environment using Docker Compose. Remember to replace your_dockerhub_username with your own Docker Hub username: Logging in this way will create a ~/.docker/config.json file in your user’s home directory with your Docker Hub credentials.Push the application image to Docker Hub with the docker push command. docker login -u your_dockerhub_usernameWhen prompted, enter your Docker Hub account password. Once it is complete, check your images:OutputREPOSITORY TAG IMAGE ID CREATED SIZEYour_dockerhub_username/node-kubernetes latest 9c6f897e1fbc 3 seconds ago 90MBNode 10-alpine 94f3c8956482 12 days ago 71MBNext, log in to the Docker Hub account you created in the prerequisites: This means that it did not copy over when we cloned the node-mongo-docker-dev repository in Step 2 of this tutorial. Gitignore file to ensure that it would not copy to version control. Please see Step 2 of Containerizing a Node.js Application for Development With Docker Compose for a longer explanation of this file.In that tutorial, we added. Env file that kompose will use to create the ConfigMap with our non-sensitive information. Additionally, we’ll redefine both containers’ restart policies to be in line with the behavior Kubernetes expects.Open the file with nano or your favorite editor:The current definition for the nodejs application service looks like this:Save and close the file when you are finished editing.Before translating our service definitions, we will need to write the. Feel free to rename your database if you would like:OutputINFO Kubernetes file "nodejs-service.yaml" createdINFO Kubernetes file "db-deployment.yaml" createdINFO Kubernetes file "dbdata-persistentvolumeclaim.yaml" createdINFO Kubernetes file "nodejs-deployment.yaml" createdINFO Kubernetes file "nodejs-env-configmap.yaml" createdThese include yaml files with specs for the Node application Service, Deployment, and ConfigMap, as well as for the dbdata PersistentVolumeClaim and MongoDB database Deployment.These files are a good starting point, but in order for our application’s functionality to match the setup described in Containerizing a Node. We will assign the database username and password separately when we manually create a Secret object in Step 4.Add the following port and database name information to the. However, instead of assigning all of the variables from the nodejs service definition in our Compose file, we will add only the MONGO_DB database name and the MONGO_PORT.
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