Appendix A - Installing Linux and Docker
To install Harmony Connect Connector, you need to have Linux and Docker Docker is a set of platform as a service products that use OS-level virtualization to deliver software in packages called containers. on your computer.
Follow the steps below to install them.
Installations
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For the list of the supported Linux operating systems, see sk178065.
This example uses the Ubuntu Linux Server for the Virtual System.
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Download the compatible version of the Ubuntu Server from https://ubuntu.com/download/server.
Select Option 2 - Manual server installation.
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Provision your Virtual Machine with the recommended specification from Requirements and start the installation process.
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Follow the official Ubuntu tutorial from https://ubuntu.com/tutorials/install-ubuntu-server#4-choose-your-language.
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In the Network connections step, edit the IP Address to allow for a static IP address.
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Set the subnet, IP address, gateway, DNS and domain information. Make sure that you use the proper formats.
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In the Configure proxy step, set the proxy information if applicable.
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In the Archive mirror step, keep the default mirror for system updates and packages.
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For Storage configuration, keep the default storage configuration.
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In the Profile setup step, enter the sudo user profile information and select Done.
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In the SSH setup step, choose to install OpenSSH Server that allows you to establish an SSH connection with the server for further configuration.
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In the Featured Server Snaps step, do not select Docker. You have to install it separately.
The Ubuntu Server downloads and installs updates. This can take a few minutes.
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Reboot the server, when all updates installation is complete.
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For installation instructions, refer to https://docs.docker.com/engine/install/ubuntu/.
Useful Docker Commands
Before you can use the container and image commands, you have to understand that a Docker image is not the same as a Docker container.
There are many internet resources that explain the difference, so you can refer to them, for example, https://phoenixnap.com/kb/docker-image-vs-container.
Then define if you want to work with your container or with the image.
Container Commands
Usage: docker container<my_command>
Command |
Description |
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Create a container from an image |
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Start an existing container |
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Create a new container and start it |
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List running containers |
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See information about a container |
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Print logs |
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Gracefully stop running container |
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Stop immediately the main process in container |
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Delete a stopped container |
Image Commands
Usage: docker image <my_command>
Command |
Description |
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Create a container from an image |
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Build the image |
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Push the image to a remote registry |
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List images |
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See intermediate image info |
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See information about the image, including the layers |
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Delete the image |
Miscellaneous Commands
Command |
Description |
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List info about your Docker client and server versions |
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Log into a Docker registry |
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Delete all unused containers, unused networks, and dangling (unrelated) images |