proxmox/nixprox.sh: prepare the nixos

proxmox/nixprox.sh

@@ -24,8 +24,60 @@ NAME=$2
 # net vlan tag 5: c3d2 (with dhcp). request a static IP address with Astro and move to 3 (serv).
 pct create $ID $TEMPLATE --hostname $NAME --ostype unmanaged --arch amd64 --net0 name=eth0,bridge=vmbr0,tag=5 --storage vms-slow --memory 4096 --cmode shell --features nesting=1
 # this boots the current profile
-echo "lxc.init.cmd: /sw/bin/init" >> /etc/pve/lxc/$ID.conf
+echo "lxc.init.cmd: /init" >> /etc/pve/lxc/$ID.conf
 
 echo Starting $ID
 pct start $ID
 
+run() {
+    lxc-attach -n $ID -- /run/current-system/sw/bin/sh -c ". /etc/profile && $*"
+}
+
+echo -n Wait for container to ship
+while S=$(run systemctl is-system-running --wait 2> /dev/null); [ "$S" != running ] && [ "$S" != degraded ]; do
+    sleep 1
+    echo -n .
+done
+echo " $S"
+
+echo Preparing sensible defaults
+run "cat > /etc/nixos/configuration.nix" <<EOF
+{ pkgs, ... }:
+{
+  boot.isContainer = true;
+  boot.loader.initScript.enable = true;
+
+  networking.hostName = "$NAME";
+  nix = {
+    useSandbox = false;
+    extraOptions = "experimental-features = nix-command flakes";
+    # package = pkgs.nixFlakes;
+  };
+  networking.useDHCP = false;
+  networking.interfaces.eth0.useDHCP = true;
+  networking.firewall.allowedTCPPorts = [ 22 ];
+  services.openssh.enable = true;
+  environment.systemPackages = with pkgs; [ vim git ];
+}
+EOF
+# Disable Nix sandbox
+run rm /etc/nix/nix.conf
+run cp /etc/static/nix/nix.conf /etc/nix/nix.conf
+run chmod u+w /etc/nix/nix.conf
+run sed \
+    -e '"s/sandbox = true/sandbox = false/"' \
+    -e '"s/max-jobs = auto/max-jobs = 2/"' \
+    -i /etc/nix/nix.conf
+run systemctl restart nix-daemon
+
+# Use fast upstream
+echo -n IPv4
+while ! run ip r a 0/0 via 172.22.99.4 metric 1 2> /dev/null; do
+    sleep 1
+    echo -n .
+done
+echo " fast"
+# Fixup init path to use new profile
+sed -e "s#lxc.init.cmd: /init#lxc.init.cmd: /sbin/init#" -i /etc/pve/lxc/$ID.conf
+# Rebuild
+run nixos-rebuild switch