Windows container networking [wip]

cni-setup-legacy.ps1

#
# this is work in progress
# the following script was from Gabriel
# will modify it to run with the v1.0.0 CNI spec.
#

$ErrorActionPreference="Stop"

$containerdDir = join-path $env:ProgramFiles containerd

if (!(Test-Path $containerdDir)){
	mkdir $containerdDir
}

$downloadPath = Join-Path $env:Tmp "containerd.tar.gz"
$downloadLink = "https://github.com/containerd/containerd/releases/download/v1.7.5/containerd-1.7.5-windows-amd64.tar.gz"

$cli = [System.Net.WebClient]::new()
$cli.DownloadFile($downloadLink, $downloadPath)

tar xf $downloadPath -C $containerdDir
if ($LASTEXITCODE) {
	Throw "failed to extract containerd"
}

$cniDir = Join-Path $containerdDir "cni"
$cniConfDir = Join-Path $cniDir "conf"
$cniBinDir = Join-Path $cniDir "bin"
$cniConfPath = Join-Path $cniConfDir "0-containerd-nat.conf"

if (!(Test-Path $cniBinDir)) {
	mkdir $cniBinDir
}

$prepareEnvScriptLink = "https://gist.githubusercontent.com/gabriel-samfira/c80ccb1d79be737e5e61214181e48ad8/raw/e393047c93b1755897cf0a1efc786557aba1f428/prepare_env_windows.ps1"
$prepareEnvScriptPath = Join-Path $env:TMP "prepare_env_windows.ps1"
$cli.DownloadFile($prepareEnvScriptLink, $prepareEnvScriptPath)

& $prepareEnvScriptPath

git clone https://github.com/Microsoft/windows-container-networking $HOME\windows-container-networking
cd $HOME\windows-container-networking
git checkout aa10a0b31e9f72937063436454def1760b858ee2
make all
cp .\out\*.exe $cniBinDir\

if (!(Test-Path $cniConfDir)) {
	mkdir $cniConfDir
}

Set-Content $cniConfPath @"
{
    "cniVersion": "0.2.0",
    "name": "nat",
    "type": "nat",
    "master": "Ethernet",
    "ipam": {
        "subnet": "172.19.208.0/20",
        "routes": [
            {
                "GW": "172.19.208.1"
            }
        ]
    },
    "capabilities": {
        "portMappings": true,
        "dns": true
    }
}
"@