consul dockerfile example

make sure your "docker_host" points to the docker swarm master and start the agents like this: at this point, we have a consul server running in docker-machine "nb-consul" and we've got three agents running on our nodes. Then, explore the Key/Value backend on your own: Thus far we've been using the root policy to interact with the API. i created a simple application that can run in frontend or in backend mode. Required fields are marked *. The first service we will use will be responsible for storing user data. in this first article, we'll create a simple docker-based architecture with a number of services that will communicate with one another using simple http calls and discover each other using consul. Now we can build the image and spin up the container: Pull up the Docker logs to make sure there were no errors in the build: Start a bash session within the running container: Take note of the unseal keys and the initial root token. Opinions expressed by DZone contributors are their own. in frontend mode, it provides a minimal ui with a button to call a backend service. Make sure to replace foo and bar with your AWS access key id and secret key, respectively. We'll look at how to do this shortly. but, for this article we just specify the ip addresses of the relevant docker-machines. next, we get the ip address of this server and then we can start our consul server like this. This is possible because we have used two different ports, and both of these services run on the same machine. Once done, make sure Sealed is false: Using the root token, you can now authenticate: Keep in mind that this uses the root policy. In our case, we map hello service 8080 container port to 8080 host port. Take a moment to think about how your team currently manages and distributes secrets: Vault provides answers to those questions and helps to solve the following problems with regard to secret management: Vault has a number of moving pieces so it can take some time to get up to speed with the overall architecture. It's even more difficult to lease and revoke them. Go to the [https://www.docker.com/get-started](Get Started with Docker) page. Here, we created a new role based on AmazonEC2ReadOnlyAccess, which is an AWS-managed policy. This will be solved in the next part of the tutorial. Best Practices for Dependency Injection with Spring. For example, with the AWS and Google Cloud backends, you can create access credentials based on IAM policies. somewhere in the coming weeks. Let's set up a policy that only has read access. September 9th, 2021, server -config=/vault/config/vault-config.json, "1 error occurred:\n\t* permission denied\n\n", agent -server -bind 0.0.0.0 -client 0.0.0.0 -bootstrap-expect 1 -config-file=/consul/config/config.json, ./consul/config/consul-config.json:/consul/config/config.json, agent -server -join consul -config-file=/consul/config/config.json, Dynamic Secret Generation with Vault and Flask. Additionally, if you want to run the rails console just run in another terminal: , to erase all your previous Consul's Docker images and containers. the following shows how this works: cool right? In this block, we have 3 services configured: The configuration of both applications is similar. Do not worry though, we will solve this issue in the second part of the series in which we will talk about service discovery. consul registrator Review the Why We Need Dynamic Secrets blog post for more info on the advantages of using dynamic secrets. Want to quickly revoke this credential? This will not scale beyond a single server, so it does not take advantage of Vault's high availability. It will also have a REST API, allowing other services to ask for that data (for simplification, we will only use one GET endpoint, and some static data). You should have installed Docker and Docker Compose in your machine: You'll be asked to give Docker app permissions and type your password, then you're set. and got a couple of requests to explain a bit more about it. we could, easily, just use an environment variable for this, which is set through a simple bash script. in this image, you can see the two modes consul can run in. as you can see in the following commands, we're also creating a docker swarm cluster at the same time, and the "nb1" node is the swarm master. Clear out all files and folders within the "vault/data" directory to remove the Filesystem backend. Join our mailing list to be notified about updates and new releases. if you want to see what this file looks like you can check the sources here ( to do this we create a simple "overlay" network like this: and since we created this on our swarm master, this network will be available in all the members of our swarm. ). we can use standard dns to lookup a service. Save my name, email, and website in this browser for the next time I comment. Let us now move to the containerization of those services, along with a Consul server, so we will be ready for the next part of the tutorial. i recently gave a presentation on how to do You can also use an inline policy to create a custom role based on your individual needs. You prefer not to interfer with other rails installations. We can also check if our consul service works, by going to http://localhost:8500: Right now under the services tab, we can only see consul service itself. for this set of articles, we won't set up a cluster of servers, but just use one. Besides development, he enjoys building financial models, tech writing, content marketing, and teaching. He is the co-founder/author of Real Python. We have a docker base image, for which we picked OpenJDK java 14 alpine version (you can read about particular java versions and images on docker hub https://hub.docker.com/_/openjdk/). We also set up a network here (network_mode parameter), to override a default bridge setting and we set its value to host. We will also change the default port the service starts with, from 8080 to 8081 in application.properties file: When we run this application and make a request to the endpoint above, we get: This is a trivial example, but it is enough for us to show what Consul has to offer. if you run windows or linux the commands might vary slightly. In this course, you'll learn how to implement a load balancer in Python using Test-Driven Development. To run all of the necessary services, we will use docker-compose. There are two types of secrets in Vault: static and dynamic. to register a service with consul, we have to make a very simple rest call to our local consul-agent, which looks something like this: as you can see, we specify the name, address, and port where the service can be found, and we add an additional health check. You can read more about network modes in docker reference, and information about why host mode is recommended for Consul you can find on the official docker hub page here https://hub.docker.com/_/consul?tab=description. You should now be able to see the user within the "Users" section on the IAM console on AWS: In this section, we'll take a quick look at how to define a custom lease period and revoke a secret before the end of that period. can be found in the following repo: https://github.com/josdirksen/next-build-consul Ports part says which port in a container we would like to map to which host port. now let's create the other three servers on which we'll run our services. with this setup, we can just reference a service by name, and use dns to resolve it. we've set up a simple architecture using 4 docker nodes. during the last year, i've become a big fan of using consul for all things related to service discovery. In this short series, we will look at how we can integrate the Spring Boot application with HashiCorp Consul. If you run on any troubles with volumes, be sure to check the official docker-compose reference site https://docs.docker.com/compose/compose-file/. before we continue with configuring the slaves, there is one more utility script that might come in handy: this script adds the ip addresses of the docker-machines to your local "hosts" file. Let us try with Users service using http://localhost:8081/user: For Hello service http://localhost:8080/hello, we will not get a nice hello JSON right now. How to Configure Multiple Data Sources in a Spring Boot Application, Using RestTemplate with Apaches HttpClient, Using GraphQL in a Spring Boot Application, Contracts for Microservices With OpenAPI and Spring Cloud Contract, Using Docker To Run MySQL Server In Your Development Environment, Using Swagger Request Validator to Validate Spring Cloud Contracts, Why Your JUnit 5 Tests Are Not Running Under Maven, Defining Spring Cloud Contracts in Open API, Using CircleCI to Build Spring Boot Microservices, Using JdbcTemplate with Spring Boot and Thymeleaf, Using the Spring @RequestMapping Annotation, Spring Data MongoDB with Reactive MongoDB, Spring Boot RESTful API Documentation with Swagger 2, Spring Boot Web Application, Part 6 Spring Security with DAO Authentication Provider, Spring Boot Web Application, Part 5 Spring Security, Testing Spring MVC with Spring Boot 1.4: Part 1, Running Spring Boot in A Docker Container, Jackson Dependency Issue in Spring Boot with Maven Build, Using YAML in Spring Boot to Configure Logback, Logback Introduction: An Enterprise Logging Framework, Log4J 2 Configuration: Using Properties File, Introducing Log4J 2 Enterprise Class Logging, Fixing NoUniqueBeanDefinitionException Exceptions, Samy is my Hero and Hacking the Magic of Spring Boot, Embedded JPA Entities Under Spring Boot and Hibernate Naming, Displaying List of Objects in Table using Thymeleaf, Spring Boot Web Application Part 4 Spring MVC, Spring Boot Example of Spring Integration and ActiveMQ, You Should Use JAXB Generated Classes for Restful Web Services, Unit Testing with JUnit Part 4 Parameterized and Theories, Unit Testing with JUnit Part 3 Hamcrest Matchers, Spring Boot Web Application Part 3 Spring Data JPA, Spring Boot Web Application Part 2 Using ThymeLeaf, Spring Boot Web Application Part 1 Spring Initializr, Using the H2 Database Console in Spring Boot with Spring Security, Integration Testing with Spring and JUnit, Using the Spring Framework for Enterprise Application Development, Introduction to Spring Expression Language (SpEL), Dependency Injection Example Using Spring, hello-service contains our Hello application configuration, users-service contains Users application configuration. In this tutorial, we have prepared a solid ground for future parts, in which we would introduce such concepts as service discovery or key/value datastore. Notice how we simply had to reference the service name: consul. . The only request we will require is to get user data from user service. so when a service is started, it automatically registers itself to the local consul agent (note that you can also do this in a more automated way, for instance, by using now that we've got our docker-machine running, we can start the consul server. let's hope that docker for mac (and windows) quickly comes out of beta ( Grab the final code from the vault-consul-docker repo. As we do not have any parameters to pass to the call, only such a simple path in request mapping annotation is sufficient. As the name suggests, it give users read-only access to the EC2 console; they cannot perform any actions or create new resources. https://blog.docker.com/2016/03/docker-for-mac-windows-beta/) Then lets create our secrets and database config files based on examples: config/secrets.yml.example config/secrets.yml, config/database-docker.yml.example config/database.yml. While running the docker compose command i am getting Invalid or corrupt jarfile app.jar for all my services.I believe the path in the volumes could be incorrect.I Have given the below path. To check if every container works as it should, we can simply check if we can call them through our browser. Static secrets (think encrypted Redis or Memcached) have refresh intervals but they do not expire unless explicitly revoked. Add a new service to docker-compose.yml: Here, we used the join command to connect this agent to an existing cluster. We created two containerized applications, that work well when used on a local computer, but they do not work well without service discovery in containers. In production you'll want to set up policies with different levels of access. Let's look at how to generate AWS credentials using the AWS backend. Each of the above requests were logged! Looking for more? Copyright 2021 Spring Framework Guru All Rights Reserved. We used the name of the service, consul, as part of the address. Review Shamir's Secret Sharing. note that all the samples, docker files, etc. Still within the bash session in the container, we can create, read, update, and delete secrets. Use the root token to login. it can run in server mode or agent mode. Add a Dockerfile to the "vault" directory: Next, add a docker-compose.yml file to the project root: Add a config file called vault-config.json to "vault/config": Here, we configured Vault to use the Filesystem backend, defined the listener for Vault, disabled TLS, and enabled the Vault UI. It has many usages, such as service discovery, service mesh, or key-value store. Please let me know what is that i am missing, movie-info-service: image: openjdk:14-alpine volumes: ./movie-info-service/target/movie-info-service-0.0.1.jar:/app.jar command: java -jar app.jar, Your email address will not be published. We just have to write some configuration in the YAML file, and start all the containers with a single command.

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