forked from Fediversity/Fediversity
data model: add classes
specifies classes in the data model, raising these to from `_class` model attributes to `subModuleWith`'s `class` parameter where possible. note: resource policy has remained as to use `deferredModuleWith` (rather than `submoduleWith`) to ensure evaluation will go thru.
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1 changed files with 147 additions and 119 deletions
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@ -11,12 +11,14 @@ let
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attrTag
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deferredModuleWith
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submodule
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submoduleWith
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optionType
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functionTo
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;
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functionType = import ./function.nix;
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application-resources = submodule {
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_class = "fediversity-application-requirements";
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options.resources = mkOption {
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# TODO: maybe transpose, and group the resources by type instead
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type = attrsOf (
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@ -31,6 +33,7 @@ let
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inputs.nixops4.modules.nixops4Deployment.default
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{
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_class = "nixops4Deployment";
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_module.args = {
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resourceProviderSystem = builtins.currentSystem;
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resources = { };
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@ -40,141 +43,163 @@ let
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};
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in
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{
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_class = "nixops4Deployment";
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_class = "fediversity-settings";
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options = {
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resources = mkOption {
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description = "Collection of deployment resources that can be required by applications and policed by hosting providers";
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type = attrsOf (
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submodule (
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{ ... }:
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{
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_class = "fediversity-resource";
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options = {
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description = mkOption {
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description = "Description of the resource to help application module authors and hosting providers to work with it";
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type = types.str;
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};
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request = mkOption {
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description = "Options for declaring resource requirements by an application, a description of how the resource is consumed or accessed";
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type = deferredModuleWith { staticModules = [ { _class = "fediversity-resource-request"; } ]; };
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};
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policy = mkOption {
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description = "Options for configuring the resource policy for the hosting provider, a description of how the resource is made available";
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type = deferredModuleWith {
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staticModules = [
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(policy: {
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_class = "fediversity-resource-policy";
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options.resource-type = mkOption {
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description = "The type of resource this policy configures";
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type = types.optionType;
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};
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# TODO(@fricklerhandwerk): we may want to make the function type explict here: `request -> resource-type`
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# and then also rename this to be consistent with the application's resource mapping
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options.apply = mkOption {
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description = "Apply the policy to a request";
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type = with types; functionTo policy.config.resource-type;
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};
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})
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];
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type = attrsOf (submoduleWith {
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class = "fediversity-resource";
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modules = [
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(
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{ ... }:
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{
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_class = "fediversity-resource";
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options = {
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description = mkOption {
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description = "Description of the resource to help application module authors and hosting providers to work with it";
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type = types.str;
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};
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request = mkOption {
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description = "Options for declaring resource requirements by an application, a description of how the resource is consumed or accessed";
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type = deferredModuleWith { staticModules = [ { _class = "fediversity-resource-request"; } ]; };
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};
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policy = mkOption {
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description = "Options for configuring the resource policy for the hosting provider, a description of how the resource is made available";
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type = deferredModuleWith {
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staticModules = [
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(policy: {
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_class = "fediversity-resource-policy";
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options.resource-type = mkOption {
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description = "The type of resource this policy configures";
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type = types.optionType;
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};
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# TODO(@fricklerhandwerk): we may want to make the function type explict here: `request -> resource-type`
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# and then also rename this to be consistent with the application's resource mapping
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options.apply = mkOption {
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description = "Apply the policy to a request";
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type = with types; functionTo policy.config.resource-type;
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};
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})
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];
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};
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};
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};
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};
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}
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)
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);
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}
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)
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];
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});
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};
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applications = mkOption {
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description = "Collection of Fediversity applications";
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type = attrsOf (
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submodule (application: {
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_class = "fediversity-application";
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options = {
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description = mkOption {
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description = "Description to be shown in the application overview";
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type = types.str;
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};
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module = mkOption {
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description = "Operator-facing configuration options for the application";
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type = deferredModuleWith { staticModules = [ { _class = "fediversity-application-config"; } ]; };
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};
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implementation = mkOption {
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description = "Mapping of application configuration to deployment resources, a description of what an application needs to run";
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type = application.config.config-mapping.function-type;
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};
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resources = mkOption {
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description = "Compute resources required by an application";
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type = functionTo application.config.config-mapping.output-type;
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readOnly = true;
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default = input: (application.config.implementation input).output;
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};
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# TODO(@fricklerhandwerk): this needs a better name, it's just the type
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config-mapping = mkOption {
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description = "Function type for the mapping from application configuration to required resources";
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type = submodule functionType;
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readOnly = true;
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default = {
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input-type = submodule application.config.module;
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output-type = application-resources;
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type = attrsOf (submoduleWith {
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class = "fediversity-application";
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modules = [
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(application: {
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_class = "fediversity-application";
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options = {
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description = mkOption {
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description = "Description to be shown in the application overview";
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type = types.str;
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};
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module = mkOption {
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description = "Operator-facing configuration options for the application";
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type = deferredModuleWith { staticModules = [ { _class = "fediversity-application-config"; } ]; };
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};
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implementation = mkOption {
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description = "Mapping of application configuration to deployment resources, a description of what an application needs to run";
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type = application.config.config-mapping.function-type;
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};
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resources = mkOption {
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description = "Compute resources required by an application";
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type = functionTo application.config.config-mapping.output-type;
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readOnly = true;
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default = input: (application.config.implementation input).output;
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};
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# TODO(@fricklerhandwerk): this needs a better name, it's just the type
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config-mapping = mkOption {
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description = "Function type for the mapping from application configuration to required resources";
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type = submoduleWith {
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class = "module-function";
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modules = [ functionType ];
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};
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readOnly = true;
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default = {
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input-type = submodule application.config.module;
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output-type = application-resources;
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};
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};
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};
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};
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})
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);
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})
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];
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});
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};
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environments = mkOption {
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description = "Run-time environments for Fediversity applications to be deployed to";
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type = attrsOf (
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submodule (environment: {
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_class = "fediversity-environment";
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options = {
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resources = mkOption {
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description = ''
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Resources made available by the hosting provider, and their policies.
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type = attrsOf (submoduleWith {
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class = "fediversity-environment";
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modules = [
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(environment: {
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options = {
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resources = mkOption {
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description = ''
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Resources made available by the hosting provider, and their policies.
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Setting this is optional, but provides a place to declare that information for programmatic use in the resource mapping.
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'';
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# TODO: maybe transpose, and group the resources by type instead
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type = attrsOf (
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attrTag (
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lib.mapAttrs (
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_name: resource:
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mkOption {
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type = submoduleWith {
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class = "fediversity-resource-policy";
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modules = [ resource.policy ];
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};
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}
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) config.resources
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)
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);
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};
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implementation = mkOption {
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description = "Mapping of resources required by applications to available resources; the result can be deployed";
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type = environment.config.resource-mapping.function-type;
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};
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resource-mapping = mkOption {
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description = "Function type for the mapping from resources to a (NixOps4) deployment";
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type = submoduleWith {
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class = "module-function";
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modules = [ functionType ];
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};
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readOnly = true;
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default = {
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input-type = application-resources;
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output-type = nixops4Deployment;
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};
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};
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# TODO(@fricklerhandwerk): maybe this should be a separate thing such as `fediversity-setup`,
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# which makes explicit which applications and environments are available.
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# then the deployments can simply be the result of the function application baked into this module.
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deployment = mkOption {
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description = "Generate a deployment from a configuration, by applying an environment's resource policies to the applications' resource mappings";
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type = functionTo (environment.config.resource-mapping.output-type);
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readOnly = true;
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default =
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cfg:
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# TODO: check cfg.enable.true
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let
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required-resources = lib.mapAttrs (
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name: application-settings: config.applications.${name}.resources application-settings
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) cfg.applications;
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in
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(environment.config.implementation required-resources).output;
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Setting this is optional, but provides a place to declare that information for programmatic use in the resource mapping.
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'';
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# TODO: maybe transpose, and group the resources by type instead
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type = attrsOf (
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attrTag (
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lib.mapAttrs (_name: resource: mkOption { type = submodule resource.policy; }) config.resources
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)
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);
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};
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implementation = mkOption {
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description = "Mapping of resources required by applications to available resources; the result can be deployed";
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type = environment.config.resource-mapping.function-type;
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};
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resource-mapping = mkOption {
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description = "Function type for the mapping from resources to a (NixOps4) deployment";
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type = submodule functionType;
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readOnly = true;
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default = {
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input-type = application-resources;
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output-type = nixops4Deployment;
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};
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};
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# TODO(@fricklerhandwerk): maybe this should be a separate thing such as `fediversity-setup`,
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# which makes explicit which applications and environments are available.
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# then the deployments can simply be the result of the function application baked into this module.
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deployment = mkOption {
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description = "Generate a deployment from a configuration, by applying an environment's resource policies to the applications' resource mappings";
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type = functionTo (environment.config.resource-mapping.output-type);
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readOnly = true;
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default =
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cfg:
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# TODO: check cfg.enable.true
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let
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required-resources = lib.mapAttrs (
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name: application-settings: config.applications.${name}.resources application-settings
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) cfg.applications;
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in
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(environment.config.implementation required-resources).output;
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};
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};
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})
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);
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})
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];
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});
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};
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configuration = mkOption {
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description = "Configuration type declaring options to be set by operators";
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@ -189,7 +214,10 @@ in
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_name: application:
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mkOption {
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description = application.description;
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type = submodule application.module;
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type = submoduleWith {
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class = "fediversity-application-config";
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modules = [ application.module ];
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};
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default = { };
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}
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) config.applications;
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