https://github.com/tv42/alone
Go Alone is an experiment into running Go as an appliance-oriented operating system
https://github.com/tv42/alone
Last synced: 4 months ago
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Go Alone is an experiment into running Go as an appliance-oriented operating system
- Host: GitHub
- URL: https://github.com/tv42/alone
- Owner: tv42
- License: mit
- Created: 2013-12-07T01:14:49.000Z (over 11 years ago)
- Default Branch: master
- Last Pushed: 2015-11-12T02:17:07.000Z (over 9 years ago)
- Last Synced: 2024-10-16T02:07:23.424Z (9 months ago)
- Language: Go
- Size: 105 KB
- Stars: 77
- Watchers: 5
- Forks: 7
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Go Alone
*Go Alone* is a brief experiment into running Go as an
appliance-oriented operating system.
We do **not** run Go on bare metal, nor did we write a kernel in Go --
we use Linux, and just replace userspace with a Go app. *All of the
userspace.*
The single Go application just becames the `init`, PID 1, of the
machine. There is nothing really difficult here, it just works.
The scripts included build a minimal kernel, intended to run inside a
KVM. They don't even include support for block devices. Take that,
12-factor apps!
Here's how to run them:
# if you have a local clone of linux.git, put it in ~/src/linux/
# to speed up first run
./do-build-kernel
# build and run the hello world example app
./do-run-hello-word
# build and run the network app and forward port 8000 to it
./do-run-network
# in a browser, open http://localhost:8000/
# when done, type control-A x
This assumes `x86_64` platform and a working install of
`qemu-system-x86_64`.
The output should look like this:
...
Unpacking initramfs...
Freeing initrd memory: 580K (ffff880007f5f000 - ffff880007ff0000)
io scheduler noop registered (default)
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
Freeing unused kernel memory: 648K (ffffffff81279000 - ffffffff8131b000)
Hello, world! I have 4 CPUs
ACPI: Preparing to enter system sleep state S5
reboot: Power down
## Roadmap
- play more with network configuration
- maybe set up virtfs
- maybe bundle asset files and/or config in the initramfs
- migrate from ad hoc scripts to utility commands, with
configurability such as RAM size.. open questions:
- what to do with generated files that are needed?
- where to store them?
- cache invisibly or make that part of the UI?
- kernel can be shared between many apps, initramfs is per app (version)
- quick cli ideas
``` sh
# build kernel
alone build-kernel [--version=VER] [--mirror=PATH] OUT_PATH
# create initramfs
alone take INITRAMFS_PATH_TO_CREATE GO_PACKAGE
# run the previously-created kernel and initramfs
alone exec [--ram=512M] KERNEL INITRAMFS
# sort of like `go run`, but takes package. builds kernel if needed
alone run [--kernel-version=VER] [--ram=512M] GO_PACKAGE
```