K3s in VS Code Devcontainer

README.md

K3s in VS Code Devcontainer

mkdir ~/ctrk3s && cd ~/ctrk3s
git clone https://gist.github.com/revant/2cfff3d63216f2d36557c4e098b810cb .devcontainer
code .

Reopen in VSCode Devcontainer to start playing around with k3s in devcontainer.

compose.yml

version: "3.7"

services:
  kubectl:
    build: .
    command: ["tail", "-f", "/dev/null"]
    environment:
      - SHELL=/bin/zsh
    volumes:
      - ..:/workspace
      - ${HOME}/.ssh:/home/castlecraft/.ssh
    working_dir: /workspace

  k3s:
    image: registry.gitlab.com/gitlab-org/cluster-integration/test-utils/k3s-gitlab-ci/releases/v1.31.2-k3s1:latest
    command:
      - server
      - --tls-san=k3s
      - --disable=traefik
    volumes:
      - k3s:/var/lib/rancher/k3s
    tmpfs:
      - /run
      - /var/run
    privileged: true
    ports:
      - 80:80
      - 443:443

volumes:
  k3s:

devcontainer.json

{
  "name": "K3s in devcontainer",
  "remoteUser": "castlecraft",
  "customizations": {
    "settings": {
      "debug.node.autoAttach": "disabled"
    },
    "extensions": [
      "ms-python.python",
      "visualstudioexptteam.vscodeintellicode"
    ]
  },
  "dockerComposeFile": "./compose.yml",
  "service": "kubectl",
  "workspaceFolder": "/workspace",
  "shutdownAction": "stopCompose"
}

Dockerfile

FROM debian:bookworm-slim

COPY entrypoint.sh /entrypoint.sh

RUN apt-get update \
    && DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
    locales \
    ca-certificates \
    curl \
    sudo \
    zsh \
    && rm -rf /var/lib/apt/lists/* \
    && sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen \
    && dpkg-reconfigure --frontend=noninteractive locales

RUN groupadd -g 1000 castlecraft \
    && useradd --no-log-init -r -m -u 1000 -g 1000 -G sudo castlecraft \
    && echo "castlecraft ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers

ENV KUBECONFIG=/home/castlecraft/.kube/config

USER castlecraft

WORKDIR /home/castlecraft

# Install Tools
RUN sudo curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" && \
    sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl && \
    curl -fsSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | sudo bash && \
    mkdir -p /home/castlecraft/.kube && \
    sudo chmod +x /entrypoint.sh

RUN sh -c "$(curl -L https://github.com/deluan/zsh-in-docker/releases/download/v1.2.1/zsh-in-docker.sh)" -- \
    -p git \
    -p kubectl \
    -p https://github.com/zsh-users/zsh-autosuggestions \
    -p https://github.com/zsh-users/zsh-completions

ENTRYPOINT [ "/entrypoint.sh" ]

entrypoint.sh

#!/bin/bash

kubectl get svc 1>/dev/null || curl -sSL k3s:8081>"${KUBECONFIG}"

exec "$@"