README: add support for aarch64

1 files changed, 30 insertions, 12 deletions

diff --git a/README b/README
index a1e59dd..6126631 100644
--- a/README
+++ b/README
@@ -1,31 +1,49 @@
-# Install NixOS on OCI VM.Standard.E2.1.Micro
+# Install NixOS on OCI
 
+# The hostname of the to-be-installed machine.
+# It's used to select the configuration.
+name=example
+
+# The IP address or domain name of the to-be-installed machine.
 target=INSERT_YOUR_PUBLIC_IP_HERE
 
+# The machine hardware name of the target machine.
+# Supported values: aarch64, x86_64
+machine=aarch64
+
 kexec_tarball=$(nix-build --no-out-link '<nixpkgs/nixos>' -A config.system.build.kexec_tarball -I nixos-config=./kexec.nix)
-scp $kexec_tarball/tarball/nixos-system-x86_64-linux.tar.xz ubuntu@$target:/tmp/
+scp $kexec_tarball/tarball/nixos-system-$machine-linux.tar.xz ubuntu@$target:/tmp/
 
-ssh ubuntu@$target
-cd / && sudo tar xf /tmp/nixos-system-x86_64-linux.tar.xz && sudo /kexec_nixos
+ssh ubuntu@$target sudo tar -C / -xf /tmp/nixos-system-$machine-linux.tar.xz
+ssh ubuntu@$target sudo /kexec_nixos
 
 sed -i "/^$target /d" ~/.ssh/known_hosts
 ssh root@$target
 
-printf '%s\n' label:gpt ,512M,U ,4G,S ,,L | sfdisk /dev/sda
-mkfs.fat -F 32 -n boot /dev/sda1
-mkswap -L swap /dev/sda2
-mkfs.ext4 -L root /dev/sda3
+# If the VM doesn't have enough memory, add a swap device and
+# increase the size of the kexec's Nix store.
+if test "$(free -m | awk '/^Mem:/{print$2}')" -lt 1024; then
+  printf '%s\n' label:gpt ,512M,U ,4G,S ,,L | sfdisk /dev/sda
+  mkfs.fat -F 32 -n boot /dev/sda1
+  mkswap -L swap /dev/sda2
+  mkfs.ext4 -L root /dev/sda3
+  swapon /dev/disk/by-label/swap
+  mount -o remount,size=800M /nix/.rw-store/
+else
+  printf '%s\n' label:gpt ,512M,U ,,L | sfdisk /dev/sda
+  mkfs.fat -F 32 -n boot /dev/sda1
+  mkfs.ext4 -L root /dev/sda2
+fi
 
 mkdir -m 0000 -p /mnt && mount /dev/disk/by-label/root /mnt
 mkdir -m 0000 -p /mnt/boot && mount /dev/disk/by-label/boot /mnt/boot
-swapon /dev/disk/by-label/swap
-
-mount -o remount,size=800M /nix/.rw-store/
 
 nix-channel --add https://nixos.org/channels/nixos-23.05 nixpkgs
 nix-channel --update
 
-scp config.nix root@$target:/mnt/etc/nixos/configuration.nix
+ssh root@$target mkdir -p /mnt/etc/nixos
+
+scp "$name"/config.nix root@$target:/mnt/etc/nixos/configuration.nix
 
 nixos-install --no-root-passwd
 shutdown -r now