cluster/services/incandescence: init
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19
cluster/services/incandescence/default.nix
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19
cluster/services/incandescence/default.nix
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{ config, ... }:
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{
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imports = [
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./options.nix
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];
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services.incandescence = {
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nodes = {
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provider = config.services.consul.nodes.agent;
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};
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nixos = {
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provider = [
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./provider.nix
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./provider-options.nix
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];
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};
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};
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}
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22
cluster/services/incandescence/options.nix
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cluster/services/incandescence/options.nix
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{ lib, ... }:
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let
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inherit (lib) mkOption;
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inherit (lib.types) attrsOf listOf submodule str;
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in
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{
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options.incandescence = {
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providers = mkOption {
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type = attrsOf (submodule ({ name, ... }: {
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options = {
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objects = mkOption {
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type = attrsOf (listOf str);
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default = { };
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};
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};
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}));
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default = { };
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};
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};
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}
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72
cluster/services/incandescence/provider-options.nix
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72
cluster/services/incandescence/provider-options.nix
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{ lib, ... }:
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let
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inherit (lib) mkEnableOption mkOption;
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inherit (lib.types) attrsOf functionTo ints listOf nullOr package submodule str;
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in
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{
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options.services.incandescence = {
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providers = mkOption {
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type = attrsOf (submodule ({ name, ... }: {
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options = {
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locksmith = mkEnableOption "Locksmith integration";
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wantedBy = mkOption {
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type = listOf str;
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};
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partOf = mkOption {
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type = listOf str;
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};
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wants = mkOption {
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type = listOf str;
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default = [ ];
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};
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after = mkOption {
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type = listOf str;
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default = [ ];
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};
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packages = mkOption {
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type = listOf package;
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default = [ ];
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};
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formulae = mkOption {
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type = attrsOf (submodule ({ ... }: {
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options = {
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deps = mkOption {
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type = listOf str;
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default = [ ];
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};
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create = mkOption {
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type = functionTo str;
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};
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change = mkOption {
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type = nullOr (functionTo str);
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default = null;
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};
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destroy = mkOption {
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type = str;
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};
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destroyAfterDays = mkOption {
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type = ints.unsigned;
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default = 0;
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};
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};
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}));
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default = { };
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};
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};
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}));
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default = { };
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};
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};
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}
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128
cluster/services/incandescence/provider.nix
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128
cluster/services/incandescence/provider.nix
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{ cluster, config, lib, ... }:
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let
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inherit (lib) concatStringsSep escapeShellArg flatten filter filterAttrs length mapAttrs mapAttrs' mapAttrsToList mkIf mkMerge pipe stringToCharacters;
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cfg = config.services.incandescence;
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clusterCfg = cluster.config.incandescence;
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in
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{
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systemd.services = pipe cfg.providers [
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(mapAttrsToList (provider: providerConfig: pipe providerConfig.formulae [
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(mapAttrsToList (formula: formulaConfig: let
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kvRoot = "services/incandescence/providers/${provider}/formulae/${formula}";
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time = "$(date +%s)";
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in {
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"ignite-${provider}-${formula}-create" = {
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description = "Ignite Creation: ${provider} - ${formula}";
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wantedBy = [ "incandescence-${provider}.target" ];
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before = [ "incandescence-${provider}.target" ];
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wants = providerConfig.wants ++ map (dep: "ignite-${provider}-${dep}-create.service") formulaConfig.deps;
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after = providerConfig.after ++ map (dep: "ignite-${provider}-${dep}-create.service") formulaConfig.deps;
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serviceConfig.Type = "oneshot";
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distributed.enable = true;
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path = [ config.services.consul.package ] ++ providerConfig.packages;
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script = pipe clusterCfg.providers.${provider}.objects.${formula} [
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(map (object: ''
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if ! consul kv get ${kvRoot}/${object}/alive >/dev/null; then
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echo "Create ${formula}: ${object}"
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if (
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${formulaConfig.create object}
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)
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then
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consul kv put ${kvRoot}/${object}/alive true
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consul kv delete ${kvRoot}/${object}/destroyOn
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else
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echo "Creation failed: ${object}"
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fi
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fi
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''))
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(concatStringsSep "\n")
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];
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};
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"ignite-${provider}-${formula}-change" = mkIf (formulaConfig.change != null) {
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description = "Ignite Change: ${provider} - ${formula}";
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wantedBy = [ "incandescence-${provider}.target" ];
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before = [ "incandescence-${provider}.target" ];
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wants = providerConfig.wants ++ [ "ignite-${provider}-${formula}-create.service" ] ++ map (dep: "ignite-${provider}-${dep}-change.service") formulaConfig.deps;
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after = providerConfig.after ++ [ "ignite-${provider}-${formula}-create.service" ] ++ map (dep: "ignite-${provider}-${dep}-change.service") formulaConfig.deps;
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serviceConfig.Type = "oneshot";
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distributed.enable = true;
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path = [ config.services.consul.package ] ++ providerConfig.packages;
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script = pipe clusterCfg.providers.${provider}.objects.${formula} [
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(map (object: ''
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echo "Change ${formula}: ${object}"
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(
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${formulaConfig.change object}
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) || echo "Change failed: ${object}"
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''))
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(concatStringsSep "\n")
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];
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};
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"ignite-${provider}-${formula}-destroy" = {
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description = "Ignite Destruction: ${provider} - ${formula}";
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wantedBy = [ "incandescence-${provider}.target" ] ++ map (dep: "ignite-${provider}-${dep}-destroy.service") formulaConfig.deps;
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before = [ "incandescence-${provider}.target" ] ++ map (dep: "ignite-${provider}-${dep}-destroy.service") formulaConfig.deps;
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wants = providerConfig.wants ++ [ "ignite-${provider}-${formula}-change.service" ];
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after = providerConfig.after ++ [ "ignite-${provider}-${formula}-change.service" ];
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serviceConfig.Type = "oneshot";
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distributed.enable = true;
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path = [ config.services.consul.package ] ++ providerConfig.packages;
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script = let
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fieldNum = pipe kvRoot [
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stringToCharacters
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(filter (x: x == "/"))
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length
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(builtins.add 2)
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toString
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];
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keyFilter = pipe clusterCfg.providers.${provider}.objects.${formula} [
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(map (x: escapeShellArg "^${x}$"))
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(concatStringsSep " \\\n -e ")
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];
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destroyAfterDays = toString formulaConfig.destroyAfterDays;
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in ''
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consul kv get --keys ${kvRoot}/ | cut -d/ -f${fieldNum} | grep -v -e ${keyFilter} | while read object; do
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if consul kv get ${kvRoot}/$object/alive >/dev/null; then
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destroyOn="$(consul kv get ${kvRoot}/$object/destroyOn || true)"
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if [[ -z "$destroyOn" && "${destroyAfterDays}" -ne 0 ]]; then
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echo "Schedule ${formula} for destruction in ${destroyAfterDays} days: $object"
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consul kv put ${kvRoot}/$object/destroyOn "$((${time} + 86400 * ${destroyAfterDays}))"
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elif [[ "${destroyAfterDays}" -eq 0 || "${time}" -ge "$destroyOn" ]]; then
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echo "Destroy ${formula}: $object"
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export OBJECT="$object"
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if (
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${formulaConfig.destroy}
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)
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then
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consul kv delete --recurse ${kvRoot}/$object
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else
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echo "Destruction failed: $object"
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fi
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else
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echo "Scheduled for destruction on $destroyOn (now: ${time})"
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fi
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fi
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done
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'';
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};
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}))
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]))
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flatten
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mkMerge
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];
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systemd.targets = mapAttrs' (provider: providerConfig: {
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name = "incandescence-${provider}";
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value = {
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description = "An Incandescence | ${provider}";
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inherit (providerConfig) wantedBy partOf;
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};
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}) cfg.providers;
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services.locksmith.providers = mapAttrs (provider: providerConfig: {
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wantedBy = [ "incandescence-${provider}.target" ];
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after = [ "incandescence-${provider}.target" ];
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}) (filterAttrs (_: providerConfig: providerConfig.locksmith) cfg.providers);
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}
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