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Some modules of cloud-init can cope with a network not immediately available (notably, the EC2 module), but some others won't retry if network is not available (notably, the Cloudstack module). network.target doesn't give much guarantee about the network availability. Applications not able to start without a fully configured network should be ordered after network-online.target. Also see #44573 and #44524.
160 lines
4.8 KiB
Nix
160 lines
4.8 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 openssh iproute ];
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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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config = mkOption {
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type = types.str;
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default = ''
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system_info:
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distro: nixos
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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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- 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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- 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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description = ''cloud-init configuration.'';
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};
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};
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};
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config = mkIf cfg.enable {
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environment.etc."cloud/cloud.cfg".text = cfg.config;
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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 = "${pkgs.cloud-init}/bin/cloud-init init --local";
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RemainAfterExit = "yes";
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TimeoutSec = "0";
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StandardOutput = "journal+console";
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};
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};
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systemd.services.cloud-init =
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{ description = "Initial cloud-init job (metadata service crawler)";
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wantedBy = [ "multi-user.target" ];
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wants = [ "local-fs.target" "network-online.target" "cloud-init-local.service"
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"sshd.service" "sshd-keygen.service" ];
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after = [ "local-fs.target" "network-online.target" "cloud-init-local.service" ];
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before = [ "sshd.service" "sshd-keygen.service" ];
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requires = [ "network.target "];
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path = path;
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serviceConfig =
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{ Type = "oneshot";
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ExecStart = "${pkgs.cloud-init}/bin/cloud-init 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-online.target" ];
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after = [ "network-online.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 = "${pkgs.cloud-init}/bin/cloud-init modules --mode=config";
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RemainAfterExit = "yes";
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TimeoutSec = "0";
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StandardOutput = "journal+console";
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};
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};
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systemd.services.cloud-final =
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{ description = "Execute cloud user/final scripts";
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wantedBy = [ "multi-user.target" ];
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wants = [ "network-online.target" ];
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after = [ "network-online.target" "syslog.target" "cloud-config.service" "rc-local.service" ];
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requires = [ "cloud-config.target" ];
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path = path;
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serviceConfig =
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{ Type = "oneshot";
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ExecStart = "${pkgs.cloud-init}/bin/cloud-init 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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