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cluster/services/incandescence: init

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This commit is contained in:
Max Headroom 2024-08-04 23:39:00 +02:00
parent 69a6e1a577
commit 4f6ea4eb8c
4 changed files with 248 additions and 0 deletions
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20
cluster/services/incandescence/default.nix Normal file
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{ config, ... }:
{
imports = [
./options.nix
];
services.incandescence = {
nodes = {
provider = config.services.consul.nodes.agent;
};
nixos = {
provider = [
./provider.nix
./provider-options.nix
];
};
simulacrum.deps = [ "consul" ];
};
}

22
cluster/services/incandescence/options.nix Normal file
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{ lib, ... }:
let
inherit (lib) mkOption;
inherit (lib.types) attrsOf listOf submodule str;
in
{
options.incandescence = {
providers = mkOption {
type = attrsOf (submodule ({ name, ... }: {
options = {
objects = mkOption {
type = attrsOf (listOf str);
default = { };
};
};
}));
default = { };
};
};
}

72
cluster/services/incandescence/provider-options.nix Normal file
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{ lib, ... }:
let
inherit (lib) mkEnableOption mkOption;
inherit (lib.types) attrsOf functionTo ints listOf nullOr package submodule str;
in
{
options.services.incandescence = {
providers = mkOption {
type = attrsOf (submodule ({ name, ... }: {
options = {
locksmith = mkEnableOption "Locksmith integration";
wantedBy = mkOption {
type = listOf str;
};
partOf = mkOption {
type = listOf str;
};
wants = mkOption {
type = listOf str;
default = [ ];
};
after = mkOption {
type = listOf str;
default = [ ];
};
packages = mkOption {
type = listOf package;
default = [ ];
};
formulae = mkOption {
type = attrsOf (submodule ({ ... }: {
options = {
deps = mkOption {
type = listOf str;
default = [ ];
};
create = mkOption {
type = functionTo str;
};
change = mkOption {
type = nullOr (functionTo str);
default = null;
};
destroy = mkOption {
type = str;
};
destroyAfterDays = mkOption {
type = ints.unsigned;
default = 0;
};
};
}));
default = { };
};
};
}));
default = { };
};
};
}

134
cluster/services/incandescence/provider.nix Normal file
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{ cluster, config, lib, ... }:
let
inherit (lib) concatStringsSep escapeShellArg flatten filter filterAttrs length mapAttrs mapAttrs' mapAttrsToList mkIf mkMerge pipe stringToCharacters;
cfg = config.services.incandescence;
clusterCfg = cluster.config.incandescence;
in
{
systemd.services = pipe cfg.providers [
(mapAttrsToList (provider: providerConfig: pipe providerConfig.formulae [
(mapAttrsToList (formula: formulaConfig: let
kvRoot = "services/incandescence/providers/${provider}/formulae/${formula}";
time = "$(date +%s)";
in {
"ignite-${provider}-${formula}-create" = {
description = "Ignite Creation: ${provider} - ${formula}";
wantedBy = [ "incandescence-${provider}.target" ];
before = [ "incandescence-${provider}.target" ];
wants = providerConfig.wants ++ map (dep: "ignite-${provider}-${dep}-create.service") formulaConfig.deps;
after = providerConfig.after ++ map (dep: "ignite-${provider}-${dep}-create.service") formulaConfig.deps;
serviceConfig.Type = "oneshot";
distributed.enable = true;
path = [ config.services.consul.package ] ++ providerConfig.packages;
script = pipe clusterCfg.providers.${provider}.objects.${formula} [
(map (object: ''
if ! consul kv get ${kvRoot}/${object}/alive >/dev/null; then
echo "Create ${formula}: ${object}"
if (
${formulaConfig.create object}
)
then
consul kv put ${kvRoot}/${object}/alive true
consul kv delete ${kvRoot}/${object}/destroyOn
else
echo "Creation failed: ${object}"
fi
fi
''))
(concatStringsSep "\n")
(script: if script == "" then ''
echo "Nothing to create"
'' else script)
];
};
"ignite-${provider}-${formula}-change" = mkIf (formulaConfig.change != null) {
description = "Ignite Change: ${provider} - ${formula}";
wantedBy = [ "incandescence-${provider}.target" ];
before = [ "incandescence-${provider}.target" ];
wants = providerConfig.wants ++ [ "ignite-${provider}-${formula}-create.service" ] ++ map (dep: "ignite-${provider}-${dep}-change.service") formulaConfig.deps;
after = providerConfig.after ++ [ "ignite-${provider}-${formula}-create.service" ] ++ map (dep: "ignite-${provider}-${dep}-change.service") formulaConfig.deps;
serviceConfig.Type = "oneshot";
distributed.enable = true;
path = [ config.services.consul.package ] ++ providerConfig.packages;
script = pipe clusterCfg.providers.${provider}.objects.${formula} [
(map (object: ''
echo "Change ${formula}: ${object}"
(
${formulaConfig.change object}
) || echo "Change failed: ${object}"
''))
(concatStringsSep "\n")
(script: if script == "" then ''
echo "Nothing to change"
'' else script)
];
};
"ignite-${provider}-${formula}-destroy" = {
description = "Ignite Destruction: ${provider} - ${formula}";
wantedBy = [ "incandescence-${provider}.target" ] ++ map (dep: "ignite-${provider}-${dep}-destroy.service") formulaConfig.deps;
before = [ "incandescence-${provider}.target" ] ++ map (dep: "ignite-${provider}-${dep}-destroy.service") formulaConfig.deps;
wants = providerConfig.wants ++ [ "ignite-${provider}-${formula}-change.service" ];
after = providerConfig.after ++ [ "ignite-${provider}-${formula}-change.service" ];
serviceConfig.Type = "oneshot";
distributed.enable = true;
path = [ config.services.consul.package ] ++ providerConfig.packages;
script = let
fieldNum = pipe kvRoot [
stringToCharacters
(filter (x: x == "/"))
length
(builtins.add 2)
toString
];
keyFilter = pipe clusterCfg.providers.${provider}.objects.${formula} [
(map (x: escapeShellArg "^${x}$"))
(concatStringsSep " \\\n -e ")
];
destroyAfterDays = toString formulaConfig.destroyAfterDays;
in ''
consul kv get --keys ${kvRoot}/ | cut -d/ -f${fieldNum} | grep -v -e ${keyFilter} | while read object; do
if consul kv get ${kvRoot}/$object/alive >/dev/null; then
destroyOn="$(consul kv get ${kvRoot}/$object/destroyOn || true)"
if [[ -z "$destroyOn" && "${destroyAfterDays}" -ne 0 ]]; then
echo "Schedule ${formula} for destruction in ${destroyAfterDays} days: $object"
consul kv put ${kvRoot}/$object/destroyOn "$((${time} + 86400 * ${destroyAfterDays}))"
elif [[ "${destroyAfterDays}" -eq 0 || "${time}" -ge "$destroyOn" ]]; then
echo "Destroy ${formula}: $object"
export OBJECT="$object"
if (
${formulaConfig.destroy}
)
then
consul kv delete --recurse ${kvRoot}/$object
else
echo "Destruction failed: $object"
fi
else
echo "Scheduled for destruction on $destroyOn (now: ${time})"
fi
fi
done
'';
};
}))
]))
flatten
mkMerge
];
systemd.targets = mapAttrs' (provider: providerConfig: {
name = "incandescence-${provider}";
value = {
description = "An Incandescence | ${provider}";
inherit (providerConfig) wantedBy partOf;
};
}) cfg.providers;
services.locksmith.providers = mapAttrs (provider: providerConfig: {
wantedBy = [ "incandescence-${provider}.target" ];
after = [ "incandescence-${provider}.target" ];
}) (filterAttrs (_: providerConfig: providerConfig.locksmith) cfg.providers);
}