I can see the 014a746dbb9d container, but the other one is not running. Protect important persistent data in volumes and bind mounts. In this article we will discuss how to create and run a Docker Container from an Image. Below you can see we are mapping port 5009 on the local server to port 5001 which is the port SpiderFoot is listening on within the container. I'll be working from a Liquid Web Core Managed CentOS 6. For example, we used the following to limit our NGINX server to only 256 MB of RAM. Second it keeps the STDIO and other fds open for the container incase containerd and/or docker both die. Occasionally you need to stop all running containers on your machine. Docker is a technology that allows you to build, run, test, and deploy distributed applications that are based on Linux containers. It creates a network with different containers, through the network containers can communicate with each other. Figure 2, shows this above behavior pictorially. A Docker container image is a lightweight, standalone, executable package of software that has everything you need to run an application - code, runtime, system tools, system libraries, and settings. Let your system restart and then log back in. Containers derived from the same image are identical to each other in terms of their application code and runtime dependencies. Users within the container will still be reported as root. The command started using docker exec will only run while the container's primary process (PID 1) is running, and will not be restarted if the container is restarted. We learned how to run. Below are a few tips that you should keep in mind for using Docker containers. Running Drill in a container is the simplest way to start using Drill; all you need is the Docker client installed on your machine. You can do this just by defining the docker socket in the container. 3 for Windows Server 2016 and 2019 Released Docker Emergency Security Update 18. Container - A running image. Note that as opposed to docker run , docker_container does not remove the default network if networks is specified. Docker is a 'container,' or a mini-operating system, you can run within your existing operating system. , it is often used for installing software packages. But does it deliver on that promise? Let’s run 1,000 containers to find out. Docker containers can be run inside an Amazon EC2 instance, Google Compute Engine instance, Rackspace server or VirtualBox, provided that the host OS supports Docker. Container technology can be used as part of a CI/CD pipeline, but this technique is something completely different. Understanding Communication Between Docker Containers In our earlier blogs, we have seen various architectures of docker containers to deploy Magento 2 server. The nginx Docker image starts the program in such a way that it doesn’t terminate immediately. Let's build our own container! For this Docker tutorial, we can choose between using Node. Docker is a technology that allows you to build, run, test, and deploy distributed applications that are based on Linux containers. So once the files are copied then the docker container is exited. It's usually run like this: [email protected]:~# docker run hello-world Hello from Docker! This message shows that your. Docker has compiled a public registry of applications available as Docker images, and this community provides many jumping off points for building and running your own container-based applications. Tip: "Docker ps" command will only list containers which are running currently, if you want to list all the containers, issue "Docker ps -a" command. This piece details how to containerize a Django Project, Postgres, and Redis for local development along with delivering the stack to the cloud via Docker Compose and Docker Machine. That said, there has been SupervisorD for quite some time. It has never been so easy to build, manage and maintain your Docker environments. In this tutorial, we'll have a look. Configure custom Slack notifications to keep your team in the loop. Why use docker and not simply set up and run OpenEMR in a Ubuntu EC2 instance? I keep pondering this to find definitive advantages and get on board but it seems, i’m still buying. Any changes to the database would not be persistent and would be lost if you started another instance of the container. Let your system restart and then log back in. Any host with the Docker runtime installed—be it a developer's laptop or a public cloud instance—can run a Docker container. Running the production Server in docker definitely makes no sense, however, for quick and dirty checks or automated testing pipelines (CD/CI) it has it’s own place. I want to ssh or bash into a running docker container. A protip by fgrehm about lxc and docker. Docker containers do not easily persist user space. docker containers. Once we have the image built or downloaded, we can use it to start containers as many as we want & run the software(s) on them. docker run -p 5009:5001 -d spiderfoot. If the container is paused, then the docker exec command will wait until the container is unpaused, and then run OPTIONS-d, --detach=true. Occasionally you need to stop all running containers on your machine. In this post we're going to take a quick look at how you can mount the Docker sock inside a container in order to create "sibling" containers. This means you never have give a user root privileges on the host, while in the client/server model (like Docker employs), you must open a socket to a privileged daemon running as root to launch the containers. Please note that the container names and ids may differ from those here when you are trying these commands along side. It is uninterested in whatever service you want to run that is expected to be available to clients. docker run. It's a container management service. Your containers. Naturally, you can have many running containers of the same image. Download Docker Desktop for Mac. What if you want it to keep running, but not in the terminal? The Solution. You can use docker-gc both as a script and container. It automates the deployment of any application as a lightweight. For example, if you were to run a web server on port 5000 in a web-app container attached to the host network, it is automatically accessible on the same port externally, without requiring to publish the port using the -p option. I use it to give me a visual cue if I forget and leave my Docker container running; or to just give me a quick list of which containers are running. Additional Considerations Running Oracle Tuxedo with Docker. This setup works on my OSX using “Docker For Desktop”, but fails in Travis CI Build. Your application will run inside a container, isolating it away from any processes you have running on your development laptop. A running instance of an image is called a container. Checking Container Status. Now from manager1 node if you check which all nodes are running the service, you will see its running on manager1 node and worker2 node. There is no IIS docker image for Nanoserver. All the best. If you have Docker installed on a bunch of hosts (different operating systems), you can leverage Kubernetes. Let's say, you want to get a bash session or you want to modify some file and configurations in a running container, you can make use of the attach command. Host Networks are best when you don’t care about the containers networking being isolated from the host but you still want the container’s workload to have a dedicated run space. When you decide to delete the container it does not automatically remove itself unless you use the –rm (flag). As an example, imagine you have a mydb container running a database service. Walkthrough: Running an OWIN Self-Hosted Web API in a Windows Docker Container Tuesday, September 1, 2015 When ASP. Continue reading “How to Start a Windows Container and Keep it Running” Docker 18. The nginx Docker image starts the program in such a way that it doesn’t terminate immediately. Overlay networks and APIs that facilitate communication between containers. There are dozens of helpful commands that you should take advantage of to get the most out of Docker. A list of running containers can be seen using the docker ps command. A running Docker container is an instantiation of an image. This piece details how to containerize a Django Project, Postgres, and Redis for local development along with delivering the stack to the cloud via Docker Compose and Docker Machine. This tutorial shows how to deploy Nginx in a Docker container. To limit memory we use the memory flag when starting a container. Docker Container is the instantiation of docker image. Traditionally, a quick summary: to run a container (assuming you've installed Docker and know the image you want to use), you need to simply docker run -it your/image. Each container can contact the other containers by the Service name used on the ‘docker-compose. By containerizing Nginx, we cut down on our sysadmin overhead. We could run it directly, but for now, let's just start a shell. Docker Compose provides an easy way to run multiple containers together without having to run multiple commands. It listens to requests sent via the Docker Engine API and it provides a command-line interface that enables users to interact with dockerd. 449s user 0m0. How to open a bash shell inside a running container and get an interactive command prompt. Docker container helps to ensure that your application works seamlessly in any environment. Multiple MarkLogic containers can be created if you wanted to cluster them. Please let us know if these two cases worked for you to keep your container running. Not a lot of people know it but by default, if you start a Windows Container without any running services docker will shut the container down. Notice that many files have been downloaded by apt update and apt install. typing exit), it is gone from the list of currently running containers: [[email protected] ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES However, Docker still knows about it, -a lists all containers including the stopped ones:. Connecting a Docker container to an ELK container running on the same host. This is not what you want in this case. Docker launches them using the Docker images as read-only templates. A global authority in container images, their team includes a Docker core maintainer as well as contributors who support the container runtime spec -- runC and containerd -- and Docker CE. To facilitate the use of YARN features, a few rules need to be followed. The nature of a docker container is to start up, run a task, then go away. Because of this, installing an application or even a large stack can often be as simple as running docker pull or docker run. There is a lot of buzz these days around Docker Containers. On the surface, creating a MySQL container for Docker is pretty easy, but if you want to connect in (not sure what a mysql server that didn’t allow that would be good for) and decouple your databases from your container (I’m assuming you don’t want those to go away with your container) then there are a few problems to sort out. Just like the CMD instruction, there can be multiple HEALTHCHECK instructions in Dockerfile but only the last one is effective. NET Core were first announced, there was a lot of excitement over the ability to run ASP. The ping -t business is an ugly way of giving Docker something to watch. Keep reading for some tips. Docker stats with two running containers Limiting Memory. Docker Swarm doesn’t manage your cloud, but rather it orchestrates Docker containers within the cloud. One way of hardening Docker containers in production is by making them immutable, i. docker stats If you just need to keep an eye on the metrics of your. Docker containers, as you already know, are running copies of an image. Run docker rm a39c259df462 to remove just that container. docker run is a command that sends a non-interactive command to the. A running instance of a Docker image with its well-defined execution environment is called a container. Fargate is the compute engine for ECS. Start using Docker now! These are the basics to get up and running, along with a few important points on how to best use Docker. What about the performance? 10 Asp. Let's give it a try!. 8+ on Linux or on Docker for Mac/Windows. How to run a process inside the Docker Container from outside? Executing process inside a running container from outside will be a common requirement. As long as the ping process runs, Docker will keep the container running in the background. To facilitate this, we'll create a Docker container that executes a simple bash script named crash. Run SQL Server as a detached container: docker container run--detach --name sql ` --env sa_password=DockerCon!!! ` dwwx/sql-server: 2017 Exploring SQL Server. You probably have multiple Docker container images, each hosting individual microservices. An idea to keep your docker ecosystem running clean and not overwhelmed by needless data is to run a periodical cleanup. Note, if you attach to the container, it will stop when you exit, but you can start it again. It can be used with the Docker Engine 1. Before we get started with Docker's restart policy, let's understand a bit more about how Docker behaves when an application crashes. The Docker container launches a process called redis-server. 5? 10/24/2016 by William Lam 6 Comments One of the most notable changes in the vCenter Server Appliance (VCSA) in vSphere 6. restart specifies a restart policy for the container. Allocate a Pseudo Terminal to the container. What’s a Container? Put simply, containers are running instances of container images. Security for Docker 1. Utility to auto forward a port from localhost into ports on Docker containers running in a boot2docker or Docker Machine VM. Orchestration of containers running on Atomic Host clusters is performed using Google's Kubernetes engine. Is a few more things to do before we can test our container properly. It then extends that experience into container orchestration with Kubernetes. In this post, I am going to show you a quick example working with Azure Functions and Docker Containers. The platform configuration option was added to Docker Compose files starting with version 2. Be sure to take a look at the Docker documentation to get more ideas on how to better manage SQL Server running on Docker. Restart policies are different from the --live-restore flag of the dockerd command. Containers derived from the same image are identical to each other in terms of their application code and runtime dependencies. That's all there is to it to get a container running :) What the container will do depends on the image of your choice. Run a process in a running container. It’s tempting to run the SSH server, because it gives an easy way to “get inside” of the container. Docker containers are a way of running applications inside isolated, portable environments. TensorFlow - Getting Started with Docker Container and Jupyter Notebook I'm studying Machine Learning and would like to share some intro experience working with TensorFlow. In this section, we are going to run a database version of this application and run both the container simultaneously via docker-compose. The ps stands for Process Status, and -a will show all processes regardless of status. The nature of a docker container is to start up, run a task, then go away. There is no IIS docker image for Nanoserver. You can see that with the command docker top CONTAINER. If this is the case, a container running on an Amazon EC2 instance can easily be ported between environments, for example to VirtualBox, achieving similar consistency and functionality. This post will go through some commands to manage your images and containers. I'm running all my application code inside a docker container and I'm using Jenkins to build. The nicest feature, in my opinion, is running Podman and containers as a non-root user. Running instances of Docker images — containers run the actual applications. Kubernetes can then. Docker is a software technology that provides an additional layer of abstraction and automation of operating-system-level virtualization called containers. Note that as opposed to docker run , docker_container does not remove the default network if networks is specified. this will run the docker container and carry out its instructions in the dockerfile (and because you told docker to run app. When the ubuntu container runs the command "docker run httpd:latest", a new container is created inside the dind container. You need to use a container name or container ID with the docker stop command. If you are not familiar with Docker, we recommend reading more about launching Docker hosts and containers in our previous article Docker containers on OpenStack VMs first. Since Octopus starts these containers in  detached mode, the containers by default are configured to exit when the root process used to run the container exits. Lead your team into the future with the latest Docker container skills! Extra things that come with this course:. " "Containers" are similar to a virtual machine in many respects. Since the Artifactory instance running in a Docker container is mutable, all data and configuration files will be lost once the container is removed. I run some containers the only job of those containers is to keep running and people can exec into it and execute some commands. docker run. At the end of the day, containers are chroots in steroids, and they also share kernel with the host so all the basic mechanics remain the same. this will run the docker container and carry out its instructions in the dockerfile (and because you told docker to run app. Docker containers offer the mobility and isolation of virtual machines (VMs), but operate at a tiny fraction of their overhead. Docker has a significant. Whatever storage you want mounted to the host, you'd mount it to the LXC. Containers have access to files that are localized for the container as well as logging. Health checks are exactly what they sound like - a way of checking the health of some resource. Note: if you want to comment or share this article, use the canonical version hosted on the Docker Blog. Before delving deeper into Docker data protection issues, it is necessary to clarify the differences between a Docker image and a Docker data container. How LCFS turns Docker commit into a constant-time operation. Start using Docker now! These are the basics to get up and running, along with a few important points on how to best use Docker. This article shows you how to create a pool of compute nodes that support running container tasks, and then run container tasks on the pool. Of course you should not rely on this workflow for anything more than experimenting around. LCFS, an open-source storage driver built exclusively for running containers, avoids the expensive operations described above by taking a completely different approach to identifying and committing changes to a container image. docker cannot stop or kill a container #22357. With Identity Server running in a Docker container, we can try logging in with one of the test accounts. Installation: Running in a Docker Container. Docker containers exit by default if no process is running on them. yml’ file should be filled with the following entries:. To limit memory we use the memory flag when starting a container. In Docker terminology, it's called a detached container, and it's the Docker Engine that keeps it running in the background. One of the best feature of docker engine is that it can provide a lot of information about the running containers. In this section, we are going to run a database version of this application and run both the container simultaneously via docker-compose. If you've been anywhere near the IT industry over the last five years, you've very likely heard of the container platform Docker. Just like the CMD instruction, there can be multiple HEALTHCHECK instructions in Dockerfile but only the last one is effective. Docker Compose provides the solution. To keep the containers running as of now i use below. This sample shows you how to connect an AWS Cloud9 SSH development environment to a running Docker container inside of an Amazon Linux instance in Amazon EC2. But what if you want to execute command on container which is already running on system. A protip by fgrehm about lxc and docker. The docker exec is used to run a command in a running container, the command above was /bin/bash which would give us a bash shell and the -it flags would put us inside the container. While the container still runs in its own Linux namespaces and root filesystems, many security restrictions are relaxed. Building a SQL-on-Linux Docker Container Using External Storage. Using Docker containers on Elastic Beanstalk. js or Go (just pick one). Containers derived from the same image are identical to each other in terms of their application code and runtime dependencies. hostname defines the container's internal hostname or in our case, the URL at where your Gitlab will be installed. The docker-gc utility helps clean up your Docker host by removing containers and images that are not required. There is no IIS docker image for Nanoserver. The cgroups and Linux specific hooks keep Docker from being implemented natively anywhere else. Starting with Docker Engine 1. This is where ECS come into the picture. Application Virtualization is More than Docker Containers - ROBIN Hyper-Converged Kubernetes Platform delivers virtualization benefits to the application lifecycle & IT user. You can use docker-gc both as a script and container. This means you never have give a user root privileges on the host, while in the client/server model (like Docker employs), you must open a socket to a privileged daemon running as root to launch the containers. An idea to keep your docker ecosystem running clean and not overwhelmed by needless data is to run a periodical cleanup. Your containers. Under Docker, an image developer can define image defaults related to detached or foreground running, and other useful settings. Batch tasks can run directly on virtual machines (nodes) in a Batch pool, but you can also set up a Batch pool to run tasks in Docker-compatible containers on the nodes. The PuppetDB dashboard, running in a container created by docker-compose. If you are not familiar with Docker, we recommend reading more about launching Docker hosts and containers in our previous article Docker containers on OpenStack VMs first. How LCFS turns Docker commit into a constant-time operation. Rather than requiring a complete operating system, like a traditional virtual machine, Docker is built on top of Linux containers, a feature of the Linux kernel, that allows light-weight Docker containers to share a common kernel while isolating applications and their dependencies. But, using the docker run [OPTIONS] command, you can add to or override the image defaults set by a developer, thus giving you more control on how a container runs. NET Core Image 5m Running a Command Prompt Inside A Container 2m User Space and Kernel Space 4m Images Contain User Space 2m You Can Run Any App in the Image 2m Layers and Shared and Immutable 2m. Running multiple container with Docker Compose To run more of these web servers we now use Docker Compose to create a farm of web servers which are running behind a HAProxy load balancer. A primary reason for this in for its consistency across environments. So lets run our first command: Note: “$ ” is my local prompt and “[email protected]:/#” is inside the container. Your containers. Add labels to your application Docker containers, and they will be picked up by the Beats autodiscover feature when they are deployed. If docker ps does not show the running container, then list the stopped containers by running: docker ps -a | grep metabase/metabase. It's a container management service. Use a restart policy To configure the restart policy for a container, use the --restart flag when using the docker run command. AWS Fargate is a compute engine for Amazon ECS that allows you to run containers without having to manage servers or clusters. Before deleting, we can use docker inspect mssql  to examine the parameters for a container (assuming the container is named mssql, of course). The docker stats command displays a live data stream with CPU, memory usage, memory limit, block I/O, and network IO metrics for all the running containers. This blog post reviews the appropriateness of Docker and other container solutions for your database environment. Understanding Communication Between Docker Containers In our earlier blogs, we have seen various architectures of docker containers to deploy Magento 2 server. The daemon is the process that runs in the operating. Are you successfully running Docker in Windows inside your virtual machines in VirtualBox? If not, maybe it’s possible to run Docker on the host system, and then mount the Docker socket onto the VirtualBox guest (just as you’d do to enable running Docker inside Docker containers)?. The command started using docker exec will only run while the container's primary process (PID 1) is running, and will not be restarted if the container is restarted. In this tutorial you will learn how to create a simple Flask App and run it inside a docker container. Run IIS + ASP. If that's the case, then use the `--user $(id -u):$(id -g)` flag in the exec command to use the current logged in user instead of root. Your application will run inside a container, isolating it away from any processes you have running on your development laptop. NVIDIA engineers found a way to share GPU drivers from host to containers, without having them installed on each container individually. This layer is often called the “container layer”. Usually, it is not a great idea to run the entire stack including the frontend, the database server, etc from inside a single a single container. Know Your Docker Commands. Containers such as those from Docker are agile, lightweight, and can be short-lived, but they and their data often need to be protected. A RavenDB Server can run on Docker using our official images available in these channels:. Presentation: What containers are, the difference between containers and virtual machines; Discussion: How do I manually run MySQL in a docker container? Presentation: How to run MySQL in a container. docker ps -a. docker cannot stop or kill a container #22357. Container -- You can think of a container for an app as a real-life shipping container for freight. Docker Compose is used to run multiple containers under a single instance. To locate a running container’s identifiers, you need to call the docker ps commandwhich lists all the running. Docker RUN Quick Reference. ) There are two ways to provide an environment variable to a container instance. Since Octopus starts these containers in  detached mode, the containers by default are configured to exit when the root process used to run the container exits. A list of running containers can be seen using the docker ps command. get up and running. Building a SQL-on-Linux Docker Container Using External Storage. Just keep in mind that running the containers on the same host will give you the privilege of executing docker commands within the container. I run some containers the only job of those containers is to keep running and people can exec into it and execute some commands. Occasionally you need to stop all running containers on your machine. That can be done with the command New-NavContainer or New-CSideDevContainer. Some containers need to allocate a pseudo terminal when a container start with the docker run command. Start by creating a file called docker-compose. This means that, by default, if an application that is running within a container crashes, the container stops and that container will remain stopped until someone or something restarts it. , it is often used for installing software packages. ravendb/ravendb containing stable, patch, rc and beta images. Its a fully managed docker container registry. The CURRENT STATE of worker1 node is Shutdown (as we stopped the container running the service). Execute command inside already running container. Create a new docker container from image. TensorFlow - Getting Started with Docker Container and Jupyter Notebook I'm studying Machine Learning and would like to share some intro experience working with TensorFlow. The syntax is ` docker cp `, and to specify the location in the container, you simply use ` container-name:location `. Restart policies are different from the --live-restore flag of the dockerd command. Docker recommends that you use restart policies, and avoid using process managers to start containers. Running instances of Docker images — containers run the actual applications. Remove the containers that are not being used and then try to run the fabric. To increase the memory available to Docker you can change the memory limit for the built-in docker service. If we list all of the Docker containers, we should have none: Now, let's create a new container based on the image we just created and start it. And last but not least – for curiosity’s sake – you just want to explore what exactly is inside your running container. When a Docker image is created from an existing container, only the changes made — which have all been "copied up" to this writeable working directory — are added into the new layer. One of my colleagues calls this DooD (Docker-outside-of-Docker) to differentiate from DinD (Docker-in-Docker), where a complete and isolated version of Docker is installed inside a container. docker run -it ubuntu bash. We believe Docker should make docker-test part of the container management lifecycle. To leave the shell and return to your host operating system, just exit bash (type exit or ctrl+d). For our use case, we will be running Laravel in a Docker container. Run IIS + ASP. Explore how to edit files within docker containers using the real world example of changing the config file for an apache web server container. What if you want it to keep running, but not in the terminal? The Solution. Docker containers usually have the absolute minimum number of processes executing. If you’ve been anywhere near the IT industry over the last five years, you’ve very likely heard of the container platform Docker. Checking Container Status. $ docker container run -it --name [NAME] nginx bash i = interactive Keep STDIN open if not attached; t = tty - Open prompt; For Git Bash, use "winpty" $ winpty docker container run -it --name [NAME] nginx bash Run/Create Ubuntu container $ docker container run -it --name ubuntu ubuntu (no bash because ubuntu uses bash by default). Run the image you previously built: docker run -p 49160:8080 -d < your username > /node-web-app. To access the d processes running in the Docker container, the container port of 80 must be mapped to a port on the guest virtual machine. To stop this container, run the command below. And look for the container that exited most recently. Docker containers. An introduction to how MySQL runs on a container and what arguments are passed, what volumes are specified, and how to use it. If the container is paused, then the docker exec command will wait until the container is unpaused, and then run OPTIONS-d, --detach=true. docker run -p 5000:5000 my-container-name. Chocolatey integrates w/SCCM, Puppet, Chef, etc. When you do this, you can keep using the docker build command without any extra flag since Docker will automatically use the image already in cache instead of downloading a new one. This image consists of SQL Server running on Linux based on Ubuntu 16. Your image should use the USER instruction to specify a non-root user for containers to. You can stop a running container at any time. The -it flag tells Docker to attach the container to the terminal, so CTRL+C should kill the container. What is Docker ? Docker is an Application Container Engine. Above process is applicable for container you are about to launch. One way of hardening Docker containers in production is by making them immutable, i. We can do that very easily using the exec flag available in docker command line. A container in detached mode cannot be removed automatically when it stops, this means one cannot use the --rm option in. When we exit the container (e. TensorFlow - Getting Started with Docker Container and Jupyter Notebook I'm studying Machine Learning and would like to share some intro experience working with TensorFlow. If you're attempting Running Windows containers on Google Cloud (Part 2), you can keep the VM. Run the image you previously built: docker run -p 49160:8080 -d < your username > /node-web-app. Docker containers can be run inside an Amazon EC2 instance, Google Compute Engine instance, Rackspace server or VirtualBox, provided that the host OS supports Docker. Your Docker settings can be accessed by right-clicking the Docker icon in the system tray and selecting Settings. Security for Docker 1. The Windows Docker base image must be at least version 1803. 449s user 0m0. typing exit), it is gone from the list of currently running containers: [[email protected] ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES However, Docker still knows about it, -a lists all containers including the stopped ones:. Run SQL Server as a detached container: docker container run--detach --name sql ` --env sa_password=DockerCon!!! ` dwwx/sql-server: 2017 Exploring SQL Server. If you omit the -d you’ll see the log. So let’s see. The cgroups and Linux specific hooks keep Docker from being implemented natively anywhere else. Installation: Running in a Docker Container. Fargate is the compute engine for ECS. You can assign memorable names to your docker containers when you run them, using the --name flag as follows. sock), /proc, /dev, etc. Docker Daemon - The background service running on the host that manages building, running and distributing Docker containers. That can be done with the command New-NavContainer or New-CSideDevContainer. Updated on December 22nd, 2017 in #docker. By default, GitLab includes Postgres and Redis in the container to make it easy to run as just a single container.