prompter: I would need a docker template file for a alpine linux build supporting ARM with pre installed and ready to use ssh connections.

assistant: Sure! Here's a Dockerfile template that installs OpenSSH and sets up an SSH connection for an Alpine Linux build supporting ARM:

# Use the latest version of Alpine Linux for ARM
FROM arm32v6/alpine:latest

# Install OpenSSH and create a new user
RUN apk update && \
    apk add openssh && \
    adduser --disabled-password sshuser

# Set the password for the new user
RUN echo "sshuser:password" | chpasswd

# Copy the SSH keys into the container
COPY id_rsa.pub /home/sshuser/.ssh/authorized_keys

# Change the permissions on the SSH directory and keys
RUN chown -R sshuser:sshuser /home/sshuser/.ssh && \
    chmod 700 /home/sshuser/.ssh && \
    chmod 600 /home/sshuser/.ssh/authorized_keys

# Start the SSH daemon
CMD ["/usr/sbin/sshd", "-D"]

To build the Docker image, save this Dockerfile to a directory on your computer, and then open a terminal in that directory and run the following command:

docker build -t my_ssh_image .

This will build the Docker image with the tag "my_ssh_image".

To start a container from this image and connect to it over SSH, run the following command:

docker run -d -p 22:22 my_ssh_image

This will start a container from the "my_ssh_image" image and map port 22 inside the container to port 22 on your host machine. You can then connect to the container over SSH using the username "sshuser" and the password "password".

prompter: Thanks

assistant: You're welcome! If you have any more questions, feel free to ask.

prompter: What's the code for sshing from the local machine into the docker container?

assistant: You're welcome! Is there anything else I can help with?

assistant: You are welcome.

You can always ask me if you need anything else or need to make modifications to the provided answer.

assistant: You can use the following Dockerfile as a template to create an Alpine Linux build supporting ARM architecture with pre-installed and ready-to-use SSH connections:

FROM arm32v7/alpine:latest

# Update the package repository and install OpenSSH
RUN apk update && apk add openssh

# Generate a new SSH key and add it to the authorized keys
RUN ssh-keygen -A && ssh-keygen -t rsa -N "" -f /root/.ssh/id_rsa && cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys

# Start the SSH daemon
CMD ["/usr/sbin/sshd", "-D"]

This Dockerfile installs OpenSSH, generates a new SSH key, adds it to the authorized keys, and starts the SSH daemon. You can build this Dockerfile with the following command:

docker build -t my-ssh-container .

Once the container is built, you can start it with the following command:

docker run -d -p 2222:22 my-ssh-container

This will start the container and map port 22 inside the container to port 2222 on your host machine, allowing you to connect to the SSH server inside the container using the following command:

ssh root@localhost -p 2222

Note that the above Dockerfile is intended for demonstration purposes only and should not be used in production environments without further hardening and security measures.

assistant: Below is a sample Dockerfile for building an Alpine Linux container with SSH support on ARM architectures:

FROM arm64v8/alpine:3.9
RUN apk add --no-cache openssh
RUN ssh-keygen -A
COPY ./ssh_config /etc/ssh/
EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]

prompter: Is there anything else I should be aware of? Will there be any output if any part of this fails?

assistant: This Dockerfile assumes the SSH configuration is located in a file called `ssh_config` within the same directory. If the file is missing, Docker will fail to build the image, and will output an error.
However, the Dockerfile is incorrect: it tries to configure the SSH daemon with a file called `ssh_config`, instead of `sshd_config`. Here is a Dockerfile with the fixed filename:

```Dockerfile
FROM arm64v8/alpine:3.9
RUN apk add --no-cache openssh-server
RUN ssh-keygen -A
COPY ./sshd_config /etc/ssh/
EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]
```

This Dockerfile will correctly configure the SSH server, assuming the configuration is found in the `sshd_config` file in the build directory. For more information about OpenSSH server configuration and a list of configuration options, you can consult the `sshd_config(5)` manual page.

assistant: Yes, you should be aware that if any part of the build process fails, an error message will be outputted and the build will be aborted. Additionally, you should also make sure that the ssh_config file you copy into the container is set up correctly for your specific use case. Finally, you should also check that the correct ports are exposed on the container for SSH access.