Merge pull request #3 from kaweezle/feature/podman

✨ Make a podman image

.github/workflows/base.yml

@@ -80,6 +80,13 @@ jobs:
       context: docker
     secrets: inherit
 
+  build-podman:
+    needs: [build-base]
+    uses: ./.github/workflows/build-box.yml
+    with:
+      context: podman
+    secrets: inherit
+
   release-rootfses:
     needs: [build-base, build-docker]
     runs-on: ubuntu-latest

docker/Dockerfile

@@ -5,6 +5,11 @@ FROM ghcr.io/kaweezle/alpine-boxes-base:${BASE_VERSION}
 USER root
 
 RUN apk add --no-cache docker && \
-    rc-update add docker default
+    rc-update add docker default && \
+    addgroup alpine docker
+
+COPY ./wsl.conf /etc/wsl.conf
+COPY dockeralias.ps1 /dockeralias.ps1
 
 USER alpine
+

docker/dockeralias.ps1

@@ -0,0 +1,17 @@
+function RunDockerInWsl {
+  # Take $Env:DOCKER_WSL or 'docker' if undefined
+  $DockerWSL = if ($null -eq $Env:DOCKER_WSL) { "docker" } else { $Env:DOCKER_WSL }
+  # Try to find an existing distribution with the name
+  $existing = Get-ChildItem HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Lxss |  Where-Object { $_.GetValue('DistributionName') -eq $DockerWSL }
+  if ($null -eq $existing) {
+    # Fail if the distribution doesn't exist
+    throw "The WSL distribution [$DockerWSL] does not exist !"
+  } else {
+    # Ensure docker is started
+    wsl -d $DockerWSL -u root openrc default
+    # Perform the requested command
+    wsl -d $DockerWSL /usr/bin/docker $args
+  }
+}
+
+Set-Alias -Name docker -Value RunDockerInWsl

docker/wsl.conf

@@ -0,0 +1,7 @@
+# this doesn't work as WSL will kill the process 15 seconds after it has started
+# If this is run from the command line, this won't happen.
+# [boot]
+# command = openrc default
+
+[user]
+default = alpine

podman/Dockerfile

@@ -0,0 +1,15 @@
+ARG BASE_VERSION=latest
+
+FROM ghcr.io/kaweezle/alpine-boxes-base:${BASE_VERSION}
+
+USER root
+
+RUN apk add --no-cache podman && \
+     echo alpine:100000:65536 >>/etc/subuid && \
+     echo alpine:100000:65536 >>/etc/subgid
+
+COPY ./oci2wsl.sh /usr/local/bin/oci2wsl
+COPY ./dockeralias.ps1 /dockeralias.ps1
+COPY ./wsl.conf /etc/wsl.conf
+
+USER alpine

podman/dockeralias.ps1

@@ -0,0 +1,15 @@
+function RunPodmanInWsl {
+  # Take $Env:PODMAN_WSL or 'docker' if undefined
+  $PodmanWSL = if ($null -eq $Env:PODMAN_WSL) { "podman" } else { $Env:PODMAN_WSL }
+  # Try to find an existing distribution with the name
+  $existing = Get-ChildItem HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Lxss |  Where-Object { $_.GetValue('DistributionName') -eq $PodmanWSL }
+  if ($null -eq $existing) {
+    # Fail if the distribution doesn't exist
+    throw "The WSL distribution [$PodmanWSL] does not exist !"
+  } else {
+    # Perform the requested command
+    wsl -d $PodmanWSL -u alpine /usr/bin/podman $args
+  }
+}
+
+Set-Alias -Name docker -Value RunPodmanInWsl

podman/oci2wsl.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env zsh
+
+usage() {
+    echo "oci2wsl: Create a WSL distribution from an OCI image"
+    echo
+    echo "Usage: oci2wsl <image> <name> <directoy>"
+    echo
+    exit 1
+}
+
+if [ $# -ne 3 ]; then
+    usage
+fi
+
+image="$1"
+name="$2"
+directory="$3"
+
+if [ ! -d "$directory" ]; then
+    echo "Error! $directory is not a directory."
+    usage
+fi
+
+ID=$(podman create -q $image 2>/dev/null)
+if [ -z "$ID" ]; then
+    echo "Error! creation of container from $image impossible."
+    exit 1
+fi
+
+podman export $ID | wsl.exe --import $name $directory - 
+
+if [ $? -ne 0 ]; then
+    echo "Error! Creation of the image impossible!"
+    podman rm $ID >/dev/null
+    exit 1
+fi
+
+podman rm $ID >/dev/null

podman/wsl.conf

@@ -0,0 +1,2 @@
+[user]
+default = alpine