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nix-config/hosts/12kingdoms-suzu/microvm.md

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# microvm.nix
## Commands
> https://github.com/astro/microvm.nix/blob/main/doc/src/microvm-command.md
```bash
# list vm
microvm -l
# update vm
microvm -u my-microvm
# show logs of a vm
journalctl -u microvm@my-microvm -n 50
# stop vm
systemctl stop microvm@$NAME
# remove vm
rm -rf /var/lib/microvms/$NAME
# Run a MicroVM in foreground(for testing)
# You have to stop the vm before running this command!
microvm -r my-microvm
# Stop a MicroVM that is running in foreground
## 1. run `sudo shutdown -h now` in the vm
## 2. run `systemctl stop microvm@my-microvm` in the host
```
## VM's pros compared to container
1. VM has its own kernel, so it can use a fullfeatured kernel or customise the kernel's
configuration, without affecting the host.
1. VM use a fullfeatured init system, so it can run services like a real machine.
1. VM can use a fullfeatured network stack, so it can run network services like a real machine. it's
very useful for hosting some network services(such as tailscale, dae, etc).
## FAQ
### 1. enter the vm without ssh
[Enter running machine as systemd service](https://github.com/astro/microvm.nix/issues/123)