From: Juraj Linkeš <juraj.lin...@pantheon.tech>

The Dockerfile defines development and CI runner images.

Signed-off-by: Juraj Linkeš <juraj.lin...@pantheon.tech>
Signed-off-by: Jeremy Spewock <jspew...@iol.unh.edu>
---
v3:

Remove pexpect.

v2:

This verson updates the dockerfile to instead install poetry using pipx
due to the version of poetry installed using the package repositories of
the distro being out of date, and to conform to documentation on
installing poetry.

This version also adds extra information to the README about the
preference of using SSH keys, and added a way to inject them into the
devcontainer for vscode.

 dts/.devcontainer/devcontainer.json | 33 ++++++++++++++
 dts/Dockerfile                      | 38 ++++++++++++++++
 dts/README.md                       | 70 +++++++++++++++++++++++++++++
 3 files changed, 141 insertions(+)
 create mode 100644 dts/.devcontainer/devcontainer.json
 create mode 100644 dts/Dockerfile
 create mode 100644 dts/README.md

diff --git a/dts/.devcontainer/devcontainer.json 
b/dts/.devcontainer/devcontainer.json
new file mode 100644
index 0000000000..6313cd3ded
--- /dev/null
+++ b/dts/.devcontainer/devcontainer.json
@@ -0,0 +1,33 @@
+// For format details, see https://aka.ms/devcontainer.json. For config 
options, see the README at:
+// 
https://github.com/microsoft/vscode-dev-containers/tree/v0.241.1/containers/docker-existing-dockerfile
+{
+       "name": "Existing Dockerfile",
+
+       // Sets the run context to one level up instead of the .devcontainer 
folder.
+       "context": "..",
+
+       // Update the 'dockerFile' property if you aren't using the standard 
'Dockerfile' filename.
+       "dockerFile": "../Dockerfile",
+
+       // Use 'forwardPorts' to make a list of ports inside the container 
available locally.
+       // "forwardPorts": [],
+
+       // Uncomment the next line to run commands after the container is 
created - for example installing curl.
+       "postCreateCommand": "poetry install --no-root",
+
+       "extensions": [
+               "ms-python.vscode-pylance",
+       ]
+
+       // Uncomment when using a ptrace-based debugger like C++, Go, and Rust
+       // "runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", 
"seccomp=unconfined" ],
+
+       // Uncomment to use the Docker CLI from inside the container. See 
https://aka.ms/vscode-remote/samples/docker-from-docker.
+       // "mounts": [ 
"source=/var/run/docker.sock,target=/var/run/docker.sock,type=bind" ],
+
+       // Uncomment to mount your SSH keys into the devcontainer used by 
vscode.
+       // "mounts": 
["source=${localEnv:HOME}/.ssh,destination=/root/.ssh,type=bind,readonly"]
+
+       // Uncomment to connect as a non-root user if you've added one. See 
https://aka.ms/vscode-remote/containers/non-root.
+       // "remoteUser": "vscode"
+}
diff --git a/dts/Dockerfile b/dts/Dockerfile
new file mode 100644
index 0000000000..fa4c1af10e
--- /dev/null
+++ b/dts/Dockerfile
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2022 University of New Hampshire
+
+# There are two Docker images defined in this Dockerfile.
+# One is to be used in CI for automated testing.
+# The other provides a DTS development environment, simplifying Python 
dependency management.
+
+FROM ubuntu:22.04 AS base
+
+RUN apt-get -y update && apt-get -y upgrade && \
+    apt-get -y install --no-install-recommends \
+        python3 \
+        python3-pip \
+        pipx \
+        python3-cachecontrol \
+        openssh-client && \
+    pipx install poetry>=1.5.1 && pipx ensurepath
+WORKDIR /dpdk/dts
+
+
+FROM base AS runner
+
+# This image is intended to be used as the base for automated systems.
+# It bakes DTS into the image during the build.
+
+COPY . /dpdk/dts
+RUN poetry install --no-dev
+
+CMD ["poetry", "run", "python", "main.py"]
+
+FROM base AS dev
+
+# This image is intended to be used as DTS development environment. It doesn't 
need C compilation
+# capabilities, only Python dependencies. Once a container mounting DTS using 
this image is running,
+# the dependencies should be installed using Poetry.
+
+RUN apt-get -y install --no-install-recommends \
+        vim emacs git
diff --git a/dts/README.md b/dts/README.md
new file mode 100644
index 0000000000..dc88ec585e
--- /dev/null
+++ b/dts/README.md
@@ -0,0 +1,70 @@
+# DTS Environment
+The execution and development environments for DTS are the same, a
+[Docker](https://docs.docker.com/) container defined by our 
[Dockerfile](./Dockerfile).
+Using a container for the development environment helps with a few things.
+
+1. It helps enforce the boundary between the DTS environment and the TG/SUT, 
something
+   which caused issues in the past.
+2. It makes creating containers to run DTS inside automated tooling much 
easier, since
+   they can be based off of a known-working environment that will be updated 
as DTS is.
+3. It abstracts DTS from the server it is running on. This means that the 
bare-metal os
+   can be whatever corporate policy or your personal preferences dictate, and 
DTS does
+   not have to try to support all distros that are supported by DPDK CI.
+4. It makes automated testing for DTS easier, since new dependencies can be 
sent in with
+  the patches.
+5. It fixes the issue of undocumented dependencies, where some test suites 
require
+   python libraries that are not installed.
+6. Allows everyone to use the same python version easily, even if they are 
using a
+   distribution or Windows with out-of-date packages.
+7. Allows you to run the tester on Windows while developing via Docker for 
Windows.
+
+## Tips for setting up a development environment
+
+### Getting a docker shell
+These commands will give you a bash shell inside the container with all the 
python
+dependencies installed. This will place you inside a python virtual 
environment. DTS is
+mounted via a volume, which is essentially a symlink from the host to the 
container.
+This enables you to edit and run inside the container and then delete the 
container when
+you are done, keeping your work. It is also strongly recommended that you 
mount your SSH
+keys into the container to allow you to connect to hosts without specifying a 
password.
+
+#### Start docker container with SSH keys
+
+```shell
+docker build --target dev -t dpdk-dts .
+docker run -v $(pwd)/..:/dpdk -v /home/dtsuser/.ssh:/root/.ssh:ro -it dpdk-dts 
bash
+$ poetry install
+$ poetry shell
+```
+
+#### Start docker container without SSH keys
+
+```shell
+docker build --target dev -t dpdk-dts .
+docker run -v $(pwd)/..:/dpdk -it dpdk-dts bash
+$ poetry install
+$ poetry shell
+```
+
+### Vim/Emacs
+Any editor in the ubuntu repos should be easy to use, with vim and emacs 
already
+installed. You can add your normal config files as a volume, enabling you to 
use your
+preferred settings.
+
+```shell
+docker run -v ${HOME}/.vimrc:/root/.vimrc -v $(pwd)/..:/dpdk -it dpdk-dts bash
+```
+
+### Visual Studio Code
+VSCode has first-class support for developing with containers. You may need to 
run the
+non-docker setup commands in the integrated terminal. DTS contains a 
.devcontainer
+config, so if you open the folder in vscode it should prompt you to use the dev
+container assuming you have the plugin installed. Please refer to
+[VS Development Containers 
Docs](https://code.visualstudio.com/docs/remote/containers)
+to set it all up. Additionally, there is a line in 
`.devcontainer/devcontainer.json`
+that, when included, will mount the SSH keys of the user currently running 
vscode into
+the container for you. The `source` on this line can be altered to mount any 
SSH keys on
+the local machine into the container at the correct location.
+
+### Other
+Searching for '$IDE dev containers' will probably lead you in the right 
direction.
-- 
2.43.0

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