I was handed a docker image which previously was being deployed using docker compose and because of that it could connect to the database using db-containername as the database's hostname. Now that I'm trying to deploy these containers as ECS Fargate tasks however I'm getting UnknownHostException: db-containername.
Is there a way that this can be fixed from the outside without changing the underlying image? And if I do have to rebuild the image how should this be done ideally?
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I configured an AWS Fargate cluster with a docker image that runs nodejs express app and listens on port 80. Now I can browse to the public IP and successfully the request is handled by AWS Fargate.
Is it right that the docker container now is running and still waiting for requests?
Isn't it consuming CPU and so I have to pay as long as the docker container is running?
Do I have to build a docker image that just handles a single request and exits to be really serverless?
Thank you
Is it right that the docker container now is running and still waiting for requests? Isn't it consuming CPU and so I have to pay as long as the docker container is running?
Yes, that's how ECS Fargate works. It's really no different from running a docker container on your local computer. It has to be up and running all the time in order to handle requests that come in.
Do I have to build a docker image that just handles a single request and exits to be really serverless?
The term "serverless" is a vague marketing term and means different things depending on who you ask. Amazon calls ECS Fargate serverless because you don't have to manage, or even know the details of, the server that is running the container. In contrast to ECS EC2 deployments, where you have to have EC2 servers up and running ahead of time and ECS just starts the containers on those EC2 servers.
If you want something that only runs, and only charges you, when a request comes in, then you would need to reconfigure your application to run on AWS Lambda instead of ECS Fargate.
Hello,
I have a running EC2 with applications installed and I want to migrate the app onto Docker container.So, can we create an ECS Docker repository using running EC2 instance?
The biggest thing in your question is dockerizing your apps.The complexity varies as per technologies used in app, app server as docker image and many other things comes into picture.Its not direct conversion and you need to do lot of work to convert apps as docker images depends app comlexity.
ECR is docker registry where you store docker images and you don't need ec2 instance for that.
Once you docker images and ECR, you need to create ECS cluster to run your apps docker containers.
I got a local Docker stack running Node.js, MongoDB and Nginx.
It runs perfectly using docker-compose up --build.
Now it's time to deploy my application to a production environment.
I have considered EC2 Container Service and EC2, but can you recommend an easier approach? The learning curve is steep!
For MongoDB -
Use AWS quick start MongoDB
http://docs.aws.amazon.com/quickstart/latest/mongodb/overview.html
http://docs.aws.amazon.com/quickstart/latest/mongodb/architecture.html
For rest of the docker stack i.e NodeJS & Nginx -
Use the AWS ElasticBeanstalk Multi Container Deployment
http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_docker_ecs.html
http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_docker_v2config.html
Elastic Beanstalk supports Docker, as documented here. Elastic Beanstalk would manage the EC2 resources for you so that you, which should make things a bit easier on you.
You can install Kontena to AWS and use that to deploy your application to production environment (of course other cloud providers are also supported). Transition from Docker Compose is very smooth since kontena.yml uses similar syntax and keys as docker-compose.yml.
With Kontena you will have private image registry, load balancer and secret management built-in that are very useful when running containers in production.
I just "Dockerized" my infrastructure into containers. The environment basically is one nginx-php-fpm container which contains nginx configured with php-fpm. This container connects to multiple data-containers which contains the application files for the specific component.
I've seen multiple talks on deploying a single container to Beanstalk, but I'm not sure how I would deploy an environment like this. Locally the environment works. I got my nginx-php-fpm container using the --volumes-from flag to a data-container.
How would I create the same environment on Beanstalk? I can't find the option to volume from another container. Also is there a good platform that handles the Docker orchestration yet?
AWS allows you to use multicontainer docker.
You can use docker-compose to help you to create your nginx-php-fpm environment.
I'm new to aws and am having some issues with getting my mobile app back running again. Forgive me if this question seems vague.
For a school project we created a mobile app on aws and deployed using docker containers (another student managed these tasks). When trying to get my own key pair to ssh into my ec2 instance i detached the volume associated with my instance and reattached it after getting my own key pair. Now i can ssh into my instance but my front end cant talk to my web server.
So my question is, do i create a new application on elastic beanstalk to deploy my app? Even though when i run lsblk is shows a have a docker loop device and when i run docker images i see several that match the name of my application? or do i somehow get the container running again, docker run doesn't seem to be working.
No need, just upload a new update into Elastic Beanstalk. AWS will handle the rest.
FYI, Elastic Beanstalk - Single Docker Container update process (simple under the hood):
You upload the update into AWS.
AWS will put it on your S3.
Inside your EC2, there is an Elastic Beanstalk agent. It will check for a new update.
If there is an update, the agent will download the update file and extract it.
The agent will build a new Docker image.
If the build is success, it will generate a new config to tell Nginx (web proxy) the new web server container.
Nginx will be reloaded.
Your old docker container will be destroyed.
Don't change anything inside EC2 of Elastic Beanstalk, except you know what you do. Elastic Beanstalk is design for automate deployment and scaling. So, if you change something in your EC2 manually, it might be lost. Of course, you can modified your EC2 instance, but you need to automate it using .ebextensions or take an image.