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HTML5 Zoom Image Example

Zooming images is one useful technique every front end web developer should learn. You might need the knowledge in one of your projects. Zooming images can be tricky but after reading this article you would get the hang of it. In this example we would learn how to zoom images in HTML. For this example we will use: A computer ...

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Setting Up AWS Authentication Before Deploying Docker Apps

Amazon Web Services (AWS) is one of the most ubiquitous cloud computing providers available today, delivering a seemingly endless suite of tools for cloud computing and development. From servers to storage and databases to deployment, if you need it, AWS probably has it. While it is used by companies like Netflix, Slack, and Pinterest to run their services, store data, ...

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Top 6 Performance Challenges in Managing Microservices in a Hybrid Cloud

Want to know How to Build (and Scale) with Microservices? Download the Whitepaper from AppDynamics: Grab it now! As we review the history of enterprise applications we have seen several trends emerge over the years. In the mid-late 90s we built applications to be large and monolithic because they were destined to be published to very large and vertically scalable ...

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Packer, Ansible and Docker Part 3: Multiple Roles

Previously we modified our setup to use a role from ansible galaxy to install and configure redis. One key thing lacking here is that one rarely needs to just use a role from ansible galaxy by itself so next up we’ll modify our playbook to define the server as a role that uses the redis role. Creating Our Role First up ...

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Build Docker Images with Packer and Ansible

Recently someone asked me where a good place is to get started learning tools like docker, packer and ansible. I did some quick googling and didn’t find what I thought were really good, in-depth tutorials so I decided to write one myself! Getting Started This tutorial assumes you are working with OSX although you should be able to accomplish the ...

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6 Video Courses to Prepare You for the New Web Era

The Internet world is changing rapidly. And as programmers, we need to stay up to date with the most recent developments. Some of the most important trends that you need to be on top of are the proliferation of frameworks like AngularJS and NodeJS, templating libraries like VueJS, and rendering libraries like React. These are all technologies that are going ...

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Packer, Ansible and Docker Part 2: Using Ansible Galaxy

Previously we setup packer, docker and ansible to build a very simple docker image that simply placed a file under /root with some content, a very simple start. Today we’ll go further and explore using ansible roles and making some pieces a bit more dynamic. A Real World Example In this tutorial, we’ll build a docker image that has Redis installed. ...

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HTML5 Range Slider Example

HTML5 has added so many new features to the HTML specification. With this newly added features we do not need to write complex or long JavaScript. One of the newly added element is the HTML <input> tag of type range. In this example we are going to learn how to work with this new element. For this example we will ...

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Deploying Docker Apps to Kubernetes with Codeship

In the first post of this series, we introduced using Kubernetes for deployments; in the second, we got started with integrating Codeship into the Kubernetes CI workflow. Now, we’ll wrap things up with how to update Kubernetes Deployments. Updating Kubernetes Deployments Once our push step is defined, we need to tell Kubernetes to update the appropriate Deployment to roll out ...

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Docker Environment Variables Example

When we create a Docker container, sometimes, we have the need of passing “arguments” to it, typically, port numbers for services, or some paths. For this, we configure the environment variables of the container, and that’s what this example is going to show. For this example, Linux Mint 18 and Docker version 1.12.1 have been used. Tip You may skip ...

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