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| author | Your Name <graham@grahamc.com> | 2021-08-20 12:36:54 -0400 |
|---|---|---|
| committer | Your Name <graham@grahamc.com> | 2021-08-20 12:42:02 -0400 |
| commit | 1b791763105fb69277d1021826bf0ea3721ca9f2 (patch) | |
| tree | 7e04dc6372c17f81c1dec3bf6f03e39638816f78 | |
| parent | 54aa35d40e8514ab26a1334bc71ac1bf03528e7f (diff) | |
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NixOS AWS AMI: enable the serial console on ttyS0
| -rw-r--r-- | nixos/modules/profiles/headless.nix | 2 | ||||
| -rw-r--r-- | nixos/modules/virtualisation/amazon-image.nix | 13 |
2 files changed, 13 insertions, 2 deletions
diff --git a/nixos/modules/profiles/headless.nix b/nixos/modules/profiles/headless.nix index 46a9b6a7d8d..c17cb287b72 100644 --- a/nixos/modules/profiles/headless.nix +++ b/nixos/modules/profiles/headless.nix @@ -9,7 +9,7 @@ with lib; boot.vesa = false; # Don't start a tty on the serial consoles. - systemd.services."serial-getty@ttyS0".enable = false; + systemd.services."serial-getty@ttyS0".enable = lib.mkDefault false; systemd.services."serial-getty@hvc0".enable = false; systemd.services."getty@tty1".enable = false; systemd.services."autovt@".enable = false; diff --git a/nixos/modules/virtualisation/amazon-image.nix b/nixos/modules/virtualisation/amazon-image.nix index 1f3b4c3709a..7ee5c096af9 100644 --- a/nixos/modules/virtualisation/amazon-image.nix +++ b/nixos/modules/virtualisation/amazon-image.nix @@ -18,7 +18,15 @@ let in { - imports = [ ../profiles/headless.nix ./ec2-data.nix ./amazon-init.nix ]; + imports = [ + ../profiles/headless.nix + # Note: While we do use the headless profile, we also explicitly + # turn on the serial console on ttyS0 below. This is because + # AWS does support accessing the serial console: + # https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/configure-access-to-serial-console.html + ./ec2-data.nix + ./amazon-init.nix + ]; config = { @@ -141,6 +149,9 @@ in services.openssh.enable = true; services.openssh.permitRootLogin = "prohibit-password"; + # Enable the serial console on ttyS0 + systemd.services."serial-getty@ttyS0".enable = true; + # Creates symlinks for block device names. services.udev.packages = [ pkgs.ec2-utils ]; |