153 lines
4.3 KiB
Nix
153 lines
4.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let cfg = config.services.cloud-init;
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path = with pkgs; [ cloud-init nettools utillinux e2fsprogs shadow dmidecode openssh ];
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configFile = pkgs.writeText "cloud-init.cfg" ''
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users:
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- root
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disable_root: false
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preserve_hostname: false
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cloud_init_modules:
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- migrator
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- seed_random
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- bootcmd
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- write-files
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- growpart
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- resizefs
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- set_hostname
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- update_hostname
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- update_etc_hosts
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- ca-certs
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- rsyslog
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- users-groups
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cloud_config_modules:
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- emit_upstart
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- disk_setup
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- mounts
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- ssh-import-id
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- set-passwords
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- timezone
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- disable-ec2-metadata
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- runcmd
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- ssh
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cloud_final_modules:
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- rightscale_userdata
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- scripts-vendor
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- scripts-per-once
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- scripts-per-boot
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- scripts-per-instance
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- scripts-user
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- ssh-authkey-fingerprints
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- keys-to-console
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- phone-home
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- final-message
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- power-state-change
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'';
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in
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{
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options = {
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services.cloud-init = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable the cloud-init service. This services reads
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configuration metadata in a cloud environment and configures
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the machine according to this metadata.
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This configuration is not completely compatible with the
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NixOS way of doing configuration, as configuration done by
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cloud-init might be overriden by a subsequent nixos-rebuild
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call. However, some parts of cloud-init fall outside of
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NixOS's responsibility, like filesystem resizing and ssh
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public key provisioning, and cloud-init is useful for that
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parts. Thus, be wary that using cloud-init in NixOS might
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come as some cost.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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systemd.services.cloud-init-local =
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{ description = "Initial cloud-init job (pre-networking)";
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wantedBy = [ "multi-user.target" ];
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wants = [ "local-fs.target" ];
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after = [ "local-fs.target" ];
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path = path;
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serviceConfig =
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{ Type = "oneshot";
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ExecStart = "${pkgs.cloud-init}/bin/cloud-init -f ${configFile} init --local";
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RemainAfterExit = "yes";
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TimeoutSec = "0";
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StandardOutput = "journal+console";
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};
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};
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systemd.services.cloud-init =
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{ description = "Initial cloud-init job (metadata service crawler)";
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wantedBy = [ "multi-user.target" ];
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wants = [ "local-fs.target" "cloud-init-local.service" "sshd.service" "sshd-keygen.service" ];
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after = [ "local-fs.target" "network.target" "cloud-init-local.service" ];
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before = [ "sshd.service" "sshd-keygen.service" ];
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requires = [ "network.target "];
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path = path;
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serviceConfig =
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{ Type = "oneshot";
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ExecStart = "${pkgs.cloud-init}/bin/cloud-init -f ${configFile} init";
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RemainAfterExit = "yes";
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TimeoutSec = "0";
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StandardOutput = "journal+console";
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};
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};
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systemd.services.cloud-config =
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{ description = "Apply the settings specified in cloud-config";
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wantedBy = [ "multi-user.target" ];
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wants = [ "network.target" ];
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after = [ "network.target" "syslog.target" "cloud-config.target" ];
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path = path;
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serviceConfig =
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{ Type = "oneshot";
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ExecStart = "${pkgs.cloud-init}/bin/cloud-init -f ${configFile} modules --mode=config";
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RemainAfterExit = "yes";
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TimeoutSec = "0";
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StandardOutput = "journal+console";
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};
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};
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systemd.services.cloud-final =
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{ description = "Execute cloud user/final scripts";
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wantedBy = [ "multi-user.target" ];
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wants = [ "network.target" ];
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after = [ "network.target" "syslog.target" "cloud-config.service" "rc-local.service" ];
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requires = [ "cloud-config.target" ];
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path = path;
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serviceConfig =
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{ Type = "oneshot";
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ExecStart = "${pkgs.cloud-init}/bin/cloud-init -f ${configFile} modules --mode=final";
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RemainAfterExit = "yes";
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TimeoutSec = "0";
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StandardOutput = "journal+console";
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};
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};
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systemd.targets.cloud-config =
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{ description = "Cloud-config availability";
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requires = [ "cloud-init-local.service" "cloud-init.service" ];
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};
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};
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}
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