【Ubuntu26.04】Ubuntu 26.04 LTSの最小構成をAutoinstallで自動インストールする

$port=8080;$root=Join-Path $env:TEMP "ubuntu-2604-autoinstall";New-Item -ItemType Directory -Force $root|Out-Null;$ud=@("#cloud-config","autoinstall:","  version: 1","  locale: ja_JP.UTF-8","  keyboard:","    layout: jp","    variant: `"`"","  timezone: Asia/Tokyo","  source:","    id: ubuntu-server-minimal","  identity:","    hostname: ubuntu-2604-autoinstall","    username: ubuntu","    password: `"`$6`$TqiSqYot.ycTffeq`$Lv8kUve3numOm5TKzQA5kwDo4mMY.SmbtBmgAnTXahLPSwlJ/1oTRJZKibXq5m99J/2jqbin/FTMqxJ3ArKAv/`"","  ssh:","    install-server: true","    allow-pw: true","  apt:","    mirror-selection:","      primary:","        - uri: `"http://jp.archive.ubuntu.com/ubuntu`"","          arches: [amd64]","        - uri: `"http://archive.ubuntu.com/ubuntu`"","          arches: [amd64]","    fallback: offline-install","    geoip: false","  storage:","    layout:","      name: direct","  packages:","    - qemu-guest-agent","  late-commands:","    - curtin in-target -- systemctl enable qemu-guest-agent","  updates: security","  shutdown: reboot") -join [Environment]::NewLine;[IO.File]::WriteAllText((Join-Path $root "user-data"),$ud,[Text.UTF8Encoding]::new($false));[IO.File]::WriteAllText((Join-Path $root "meta-data"),"",[Text.ASCIIEncoding]::new());$listener=[Net.Sockets.TcpListener]::new([Net.IPAddress]::Any,$port);$listener.Start();"Serving $root at http://0.0.0.0:$port/";while($true){$client=$listener.AcceptTcpClient();try{$stream=$client.GetStream();$reader=[IO.StreamReader]::new($stream,[Text.Encoding]::ASCII,$false,1024,$true);$request=$reader.ReadLine();do{$header=$reader.ReadLine()}while($header);$path="/user-data";if($request -match '^\S+\s+([^\s]+)'){$path=$Matches[1]};$name=[Uri]::UnescapeDataString($path.Split('?')[0].TrimStart('/'));if([string]::IsNullOrWhiteSpace($name)){$name="user-data"};$file=Join-Path $root $name;if(Test-Path $file){$body=[IO.File]::ReadAllBytes($file);$head=[Text.Encoding]::ASCII.GetBytes("HTTP/1.1 200 OK`r`nContent-Type: text/plain`r`nContent-Length: $($body.Length)`r`nConnection: close`r`n`r`n");$stream.Write($head,0,$head.Length);$stream.Write($body,0,$body.Length)}else{$body=[Text.Encoding]::UTF8.GetBytes("not found");$head=[Text.Encoding]::ASCII.GetBytes("HTTP/1.1 404 Not Found`r`nContent-Type: text/plain`r`nContent-Length: $($body.Length)`r`nConnection: close`r`n`r`n");$stream.Write($head,0,$head.Length);$stream.Write($body,0,$body.Length)}}finally{$client.Close()}}

PS C:\Users\kyoro> curl.exe http://192.168.11.170:8080/user-data

PS C:\Users\kyoro> curl.exe http://127.0.0.1:8080/user-data
#cloud-config
autoinstall:
 version: 1
 locale: ja_JP.UTF-8
 keyboard:
 layout: jp
 variant: ""
 timezone: Asia/Tokyo
 source:
 id: ubuntu-server-minimal
 identity:
 hostname: ubuntu-2604-autoinstall
 username: ubuntu
 password: "$6$TqiSqYot.ycTffeq$Lv8kUve3numOm5TKzQA5kwDo4mMY.SmbtBmgAnTXahLPSwlJ/1oTRJZKibXq5m99J/2jqbin/FTMqxJ3ArKAv/"
 ssh:
 install-server: true
 allow-pw: true
 apt:
 mirror-selection:
 primary:
 - uri: "http://jp.archive.ubuntu.com/ubuntu"
 arches: [amd64]
 - uri: "http://archive.ubuntu.com/ubuntu"
 arches: [amd64]
 fallback: offline-install
 geoip: false
 storage:
 layout:
 name: direct
 packages:
 - qemu-guest-agent
 late-commands:
 - curtin in-target -- systemctl enable qemu-guest-agent
 updates: security
 shutdown: reboot

cat /etc/os-release

PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
VERSION_ID="26.04"
VERSION="26.04 (Resolute Raccoon)"
VERSION_CODENAME=resolute
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=resolute
LOGO=ubuntu-logo