Alpine initial state not working?

[progrium]

I ported the debian build-state script and debian.html and I got it producing a state file. For whatever reason I had to start in single user mode because it seemed to get stuck after starting syslog with openrc. But the state file (compressed or not) doesn't seem to want to load, I just get:

No errors. Loading with:

    var emulator = new V86({
        wasm_path: "../build/v86.wasm",
        memory_size: 512 * 1024 * 1024,
        vga_memory_size: 8 * 1024 * 1024,
        screen_container: document.getElementById("screen_container"),
        // bios: { url: "../bios/seabios.bin" },
        // vga_bios: { url: "../bios/vgabios.bin" },
        // network_relay_url: "ws://localhost:8081",
        initial_state: { url: "../images/alpine-state-base.bin.zst" },
        filesystem: {
            baseurl: "../images/alpine-rootfs-flat/",
            // basefs: "../images/alpine-fs.json",
        },
        autostart: true,
        // bzimage_initrd_from_filesystem: true,
        // cmdline: "rw  root=host9p rootfstype=9p rootflags=trans=virtio,cache=loose modules=virtio_pci tsc=reliable", //init=/bin/sh
    });

Here is the build-state:

#!/usr/bin/env node
"use strict";

const path = require("path");

// TODO:
// - Timeout

console.log("Don't forget to run `make all` before running this script");

var fs = require("fs");
var V86 = require("./../../../build/libv86.js").V86;

const V86_ROOT = path.join(__dirname, "../../..");

var OUTPUT_FILE = path.join(V86_ROOT, "images/alpine-state-base.bin");

process.stdin.setRawMode(true);
process.stdin.resume();
process.stdin.setEncoding("utf8");
process.stdin.on("data", handle_key);

var emulator = new V86({
    bios: { url: path.join(V86_ROOT, "/bios/seabios.bin") },
    vga_bios: { url: path.join(V86_ROOT, "/bios/vgabios.bin") },
    autostart: true,
    memory_size: 512 * 1024 * 1024,
    vga_memory_size: 8 * 1024 * 1024,
    // network_relay_url: "ws://localhost:8081",
    bzimage_initrd_from_filesystem: true,
    cmdline: "rw init=/bin/sh root=host9p rootfstype=9p rootflags=trans=virtio,cache=loose modules=virtio_pci console=ttyS0", //spectre_v2=off pti=off tsc=reliable
    filesystem: {
        basefs: path.join(V86_ROOT, "/images/alpine-fs.json"),
        baseurl: path.join(V86_ROOT, "/images/alpine-rootfs-flat/"),
    },
    screen_dummy: true,
});

console.log("Now booting, please stand by ...");

var boot_start = Date.now();
var serial_text = "";
let booted = false;

emulator.add_listener("serial0-output-byte", function(byte)
{
    var c = String.fromCharCode(byte);
    process.stdout.write(c);

    serial_text += c;

    if(!booted && serial_text.endsWith("~ # "))
    {
        console.error("\nBooted in %d", (Date.now() - boot_start) / 1000);
        booted = true;

        // sync and drop caches: Makes it safer to change the filesystem as fewer files are rendered
        emulator.serial0_send("sync;echo 3 >/proc/sys/vm/drop_caches\n");

        setTimeout(async function ()
            {
                const s = await emulator.save_state();

                fs.writeFile(OUTPUT_FILE, new Uint8Array(s), function(e)
                    {
                        if(e) throw e;
                        console.error("Saved as " + OUTPUT_FILE);
                        stop();
                    });
            }, 10 * 1000);
    }
});

function handle_key(c)
{
    if(c === "\u0003")
    {
        // ctrl c
        stop();
    }
    else
    {
        emulator.serial0_send(c);
    }
}

function stop()
{
    emulator.stop();
    process.stdin.pause();
}

[progrium]

Oh! No its working, I just have to interact with it via serial.

[SuperMaxusa]

Here are some changes for your build-state.js script:

@@ -28,7 +28,7 @@ var emulator = new V86({
     vga_memory_size: 8 * 1024 * 1024,
     // network_relay_url: "ws://localhost:8081",
     bzimage_initrd_from_filesystem: true,
-    cmdline: "rw init=/bin/sh root=host9p rootfstype=9p rootflags=trans=virtio,cache=loose modules=virtio_pci console=ttyS0", //spectre_v2=off pti=off tsc=reliable
+    cmdline: "rw root=host9p rootfstype=9p rootflags=trans=virtio,cache=loose modules=virtio_pci console=ttyS0 console=tty1", //spectre_v2=off pti=off tsc=reliable
     filesystem: {
         basefs: path.join(V86_ROOT, "/images/alpine-fs.json"),
         baseurl: path.join(V86_ROOT, "/images/alpine-rootfs-flat/"),

As I understand, in your case console is only enabled on serial port (ttyS0), so you got a empty screen. I have added console=tty1 and console enabled on screen and serial port (make sure that you have added autologin for ttyS0, shown below).

v86/tools/docker/alpine/Dockerfile

Line 17 in 9286ca8

RUN echo 'ttyS0::respawn:/sbin/agetty --autologin root -s ttyS0 115200 vt100' >> /etc/inittab

Also I changed init from /bin/sh to OpenRC and changed pattern for shell, it worked for me without problems (maybe Alpine Linux has some different serial terminal type than the vt100 by default, which have a problems with OpenRC?).

@@ -49,7 +49,7 @@ emulator.add_listener("serial0-output-byte", function(byte)
 
     serial_text += c;
 
-    if(!booted && serial_text.endsWith("~ # "))
+    if(!booted && serial_text.endsWith(":~# "))
     {
         console.error("\nBooted in %d", (Date.now() - boot_start) / 1000);
         booted = true;

---

...or use a examples/arch.html, change options for Alpine and you can save a state using your browser