Docker compose service discovery

How does Docker Compose work? What is the purpose of Docker? Application services can also be scaled-out to multiple container instances using Compose. Browse other questions tagged docker docker-compose service-discovery or ask your own question.

Using service discovery patterns in a containerized environment. In this step, we have dockerized all APIs and start them together. Estimated Reading Time: minutes Docker 1. Thanks to Docker Inc.

In my earlier post, I briefed around Service Discovery concept and how does it work in terms of Swarm Mode. One of the core technologies that many Docker environments rely on is service discovery. Service discovery allows an application or component to discover information about their environment and neighbors.

This is usually implemented as a distributed key-value store, which can also serve as a more general location to dictate configuration details. Docker uses embedded DNS to provide service discovery for containers running on a single Docker engine and tasks running in a Docker swarm. Docker engine has an internal DNS server that provides name resolution to all of the containers on the host in user-defined bridge, overlay, and MACVLAN networks. In the following example, db and redis are started before web.

SERVICE automatically includes SERVICE ’s dependencies. In the example below, docker-compose up web also creates and starts db and redis. Docker Datacenter includes Universal Control Plane (UCP), Docker Trusted Registry (DTR), and Commercially Supported Docker Engine to buil ship and run distributed applications anywhere. Today, we are releasing a supported reference architecture to help you design and configure UCP with load balancing and service discovery. In this post, we build a simple Python web application running on Docker Compose.

The application uses the Flask and maintains a hit counter in Redis. The purpose of this lab is to illustrate how Service Discovery works under Swarm Mode. Consul for Service Discovery in Docker Swarm. WordPress is an open-source content management system (CMS) based on PHP and MySQL. You can configure the port of the web interface and the REST API and the location of the Docker API socket via flags.

The service discovery is also available as Docker container for Linux (amd64) from Docker Hub. Docker Compose handles service discovery directly, allowing the app to reference the service directly and Docker will route traffic to the right container. To try it out, open a text editor and paste the text from this file.

Then save it as docker - compose. This time I will cover the situation how to use service discovery for your. The need for service discovery is as strong as ever, and Docker decided to incorporate it inside Docker Engine.

The internal process is, essentially, still very similar to the one used by the standalone Swarm, only with less moving parts. It is bundled inside just as Swarm is. Ok, let’s start with few goals for this project.

Although I demoed with virtualbox, you could do the same with Digital Ocean, AWS or any supported cloud provider to deploy Swarm clusters for production. Docker - compose basic example¶ In this section we quickly go over a basic docker - compose file exposing a simple service using the docker provider. This will also be used as a starting point for the the other docker - compose guides.

Setup¶ Edit a docker - compose.