cdk8s
Version:
This is the core library of Cloud Development Kit (CDK) for Kubernetes (cdk8s). cdk8s apps synthesize into standard Kubernetes manifests which can be applied to any Kubernetes cluster.
293 lines • 42.9 kB
JavaScript
;
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.App = exports.YamlOutputType = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
const fs = require("fs");
const path = require("path");
const constructs_1 = require("constructs");
const api_object_1 = require("./api-object");
const chart_1 = require("./chart");
const dependency_1 = require("./dependency");
const names_1 = require("./names");
const resolve_1 = require("./resolve");
const yaml_1 = require("./yaml");
/** The method to divide YAML output into files */
var YamlOutputType;
(function (YamlOutputType) {
/** All resources are output into a single YAML file */
YamlOutputType[YamlOutputType["FILE_PER_APP"] = 0] = "FILE_PER_APP";
/** Resources are split into seperate files by chart */
YamlOutputType[YamlOutputType["FILE_PER_CHART"] = 1] = "FILE_PER_CHART";
/** Each resource is output to its own file */
YamlOutputType[YamlOutputType["FILE_PER_RESOURCE"] = 2] = "FILE_PER_RESOURCE";
/** Each chart in its own folder and each resource in its own file */
YamlOutputType[YamlOutputType["FOLDER_PER_CHART_FILE_PER_RESOURCE"] = 3] = "FOLDER_PER_CHART_FILE_PER_RESOURCE";
})(YamlOutputType || (exports.YamlOutputType = YamlOutputType = {}));
class SynthRequestCache {
constructor() {
this.nodeChildrenCache = new Map();
}
findAll(node) {
if (this.nodeChildrenCache.has(node)) {
return this.nodeChildrenCache.get(node);
}
const children = node.findAll();
this.nodeChildrenCache.set(node, children);
return children;
}
}
/**
* Represents a cdk8s application.
*/
class App extends constructs_1.Construct {
/**
* Synthesize a single chart.
*
* Each element returned in the resulting array represents a different ApiObject
* in the scope of the chart.
*
* Note that the returned array order is important. It is determined by the various dependencies between
* the constructs in the chart, where the first element is the one without dependencies, and so on...
*
* @returns An array of JSON objects.
* @param chart the chart to synthesize.
* @internal
*/
static _synthChart(chart) {
const app = App.of(chart);
const cache = new SynthRequestCache();
// we must prepare the entire app before synthesizing the chart
// because the dependency inference happens on the app level.
resolveDependencies(app, cache);
// validate the app since we want to call onValidate of the relevant constructs.
// note this will also call onValidate on constructs from possibly different charts,
// but thats ok too since we no longer treat constructs as a self-contained synthesis unit.
validate(app, cache);
return chartToKube(chart).map(obj => obj.toJson());
}
static of(c) {
const scope = c.node.scope;
if (!scope) {
// the app is the only construct without a scope.
return c;
}
return App.of(scope);
}
/**
* Returns all the charts in this app, sorted topologically.
*/
get charts() {
const isChart = (x) => x instanceof chart_1.Chart;
return new dependency_1.DependencyGraph(this.node)
.topology()
.filter(isChart);
}
/**
* Defines an app
* @param props configuration options
*/
constructor(props = {}) {
super(undefined, '');
this.outdir = props.outdir ?? process.env.CDK8S_OUTDIR ?? 'dist';
this.outputFileExtension = props.outputFileExtension ?? '.k8s.yaml';
this.yamlOutputType = props.yamlOutputType ?? YamlOutputType.FILE_PER_CHART;
this.resolvers = [...(props.resolvers ?? []), new resolve_1.LazyResolver(), new resolve_1.ImplicitTokenResolver(), new resolve_1.NumberStringUnionResolver()];
this.recordConstructMetadata = props.recordConstructMetadata ?? (process.env.CDK8S_RECORD_CONSTRUCT_METADATA === 'true' ? true : false);
}
/**
* Synthesizes all manifests to the output directory
*/
synth() {
fs.mkdirSync(this.outdir, { recursive: true });
const cache = new SynthRequestCache();
// Since we plan on removing the distributed synth mechanism, we no longer call `Node.synthesize`, but rather simply implement
// the necessary operations. We do however want to preserve the distributed validation.
validate(this, cache);
// this is kind of sucky, eventually I would like the DependencyGraph
// to be able to answer this question.
const hasDependantCharts = resolveDependencies(this, cache);
const charts = this.charts;
switch (this.yamlOutputType) {
case YamlOutputType.FILE_PER_APP:
let apiObjectsList = [];
for (const chart of charts) {
apiObjectsList.push(...Object.values(chart.toJson()));
}
if (charts.length > 0) {
yaml_1.Yaml.save(path.join(this.outdir, `app${this.outputFileExtension}`), // There is no "app name", so we just hardcode the file name
apiObjectsList);
}
break;
case YamlOutputType.FILE_PER_CHART:
const namer = hasDependantCharts ? new IndexedChartNamer() : new SimpleChartNamer();
for (const chart of charts) {
const chartName = namer.name(chart);
const objects = Object.values(chart.toJson());
yaml_1.Yaml.save(path.join(this.outdir, chartName + this.outputFileExtension), objects);
}
break;
case YamlOutputType.FILE_PER_RESOURCE:
for (const chart of charts) {
const apiObjects = Object.values(chart.toJson());
apiObjects.forEach((apiObject) => {
if (!(apiObject === undefined)) {
const fileName = `${`${apiObject.kind}.${apiObject.metadata.name}`
.replace(/[^0-9a-zA-Z-_.]/g, '')}`;
yaml_1.Yaml.save(path.join(this.outdir, fileName + this.outputFileExtension), [apiObject]);
}
});
}
break;
case YamlOutputType.FOLDER_PER_CHART_FILE_PER_RESOURCE:
const folderNamer = hasDependantCharts ? new IndexedChartFolderNamer() : new SimpleChartFolderNamer();
for (const chart of charts) {
const chartName = folderNamer.name(chart);
const apiObjects = chartToKube(chart);
const fullOutDir = path.join(this.outdir, chartName);
fs.mkdirSync(fullOutDir, { recursive: true });
apiObjects.forEach((apiObject) => {
if (!(apiObject === undefined)) {
const fileName = `${`${apiObject.kind}.${apiObject.metadata.name}`
.replace(/[^0-9a-zA-Z-_.]/g, '')}`;
yaml_1.Yaml.save(path.join(fullOutDir, fileName + this.outputFileExtension), [apiObject.toJson()]);
}
});
}
break;
default:
break;
}
if (this.recordConstructMetadata) {
const allObjects = this.charts.flatMap(chartToKube);
this.writeConstructMetadata(allObjects);
}
}
/**
* Synthesizes the app into a YAML string.
*
* @returns A string with all YAML objects across all charts in this app.
*/
synthYaml() {
const cache = new SynthRequestCache();
resolveDependencies(this, cache);
validate(this, cache);
const charts = this.charts;
const docs = [];
for (const chart of charts) {
docs.push(...Object.values(chart.toJson()));
}
return yaml_1.Yaml.stringify(...docs);
}
writeConstructMetadata(apiObjects) {
const resources = {};
for (const apiObject of apiObjects) {
resources[apiObject.name] = { path: apiObject.node.path };
}
fs.writeFileSync(path.join(this.outdir, 'construct-metadata.json'), JSON.stringify({
version: '1.0.0',
resources: resources,
}));
}
}
exports.App = App;
_a = JSII_RTTI_SYMBOL_1;
App[_a] = { fqn: "cdk8s.App", version: "2.69.52" };
function validate(app, cache) {
const errors = [];
for (const child of cache.findAll(app.node)) {
const childErrors = child.node.validate();
for (const error of childErrors) {
errors.push(`[${child.node.path}] ${error}`);
}
}
if (errors.length > 0) {
throw new Error(`Validation failed with the following errors:\n ${errors.join('\n ')}`);
}
}
function buildDependencies(app, cache) {
const deps = [];
for (const child of cache.findAll(app.node)) {
for (const dep of child.node.dependencies) {
deps.push({ source: child, target: dep });
}
}
return deps;
}
function resolveDependencies(app, cache) {
let hasDependantCharts = false;
// create an explicit chart dependency from nested chart relationships
for (const parentChart of cache.findAll(app.node).filter(x => x instanceof chart_1.Chart)) {
for (const childChart of parentChart.node.children.filter(x => x instanceof chart_1.Chart)) {
parentChart.node.addDependency(childChart);
hasDependantCharts = true;
}
}
// create an explicit chart dependency from implicit construct dependencies
for (const dep of buildDependencies(app, cache)) {
const sourceChart = chart_1.Chart.of(dep.source);
const targetChart = chart_1.Chart.of(dep.target);
if (sourceChart !== targetChart) {
sourceChart.node.addDependency(targetChart);
hasDependantCharts = true;
}
}
// create explicit api object dependencies from implicit construct dependencies
for (const dep of buildDependencies(app, cache)) {
const sourceChart = chart_1.Chart.of(dep.source);
const targetChart = chart_1.Chart.of(dep.target);
const targetApiObjects = cache.findAll(dep.target.node).filter(c => c instanceof api_object_1.ApiObject).filter(x => chart_1.Chart.of(x) === targetChart);
const sourceApiObjects = cache.findAll(dep.source.node).filter(c => c instanceof api_object_1.ApiObject).filter(x => chart_1.Chart.of(x) === sourceChart);
for (const target of targetApiObjects) {
for (const source of sourceApiObjects) {
if (target !== source) {
source.node.addDependency(target);
}
}
}
}
return hasDependantCharts;
}
function chartToKube(chart) {
return new dependency_1.DependencyGraph(chart.node).topology()
.filter(x => x instanceof api_object_1.ApiObject)
.filter(x => chart_1.Chart.of(x) === chart) // include an object only in its closest parent chart
.map(x => x);
}
class SimpleChartNamer {
constructor() {
}
name(chart) {
return `${names_1.Names.toDnsLabel(chart)}`;
}
}
class IndexedChartNamer extends SimpleChartNamer {
constructor() {
super();
this.index = 0;
}
name(chart) {
const name = `${this.index.toString().padStart(4, '0')}-${super.name(chart)}`;
this.index++;
return name;
}
}
class SimpleChartFolderNamer {
constructor() {
}
name(chart) {
return names_1.Names.toDnsLabel(chart);
}
}
class IndexedChartFolderNamer extends SimpleChartFolderNamer {
constructor() {
super();
this.index = 0;
}
name(chart) {
const name = `${this.index.toString().padStart(4, '0')}-${super.name(chart)}`;
this.index++;
return name;
}
}
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* as fs from 'fs';\nimport * as path from 'path';\nimport { Construct, IConstruct, Node } from 'constructs';\nimport { ApiObject } from './api-object';\nimport { Chart } from './chart';\nimport { DependencyGraph } from './dependency';\nimport { Names } from './names';\nimport { IResolver, ImplicitTokenResolver, LazyResolver, NumberStringUnionResolver } from './resolve';\nimport { Yaml } from './yaml';\n\n/** The method to divide YAML output into files */\nexport enum YamlOutputType {\n  /** All resources are output into a single YAML file */\n  FILE_PER_APP,\n  /** Resources are split into seperate files by chart */\n  FILE_PER_CHART,\n  /** Each resource is output to its own file */\n  FILE_PER_RESOURCE,\n  /** Each chart in its own folder and each resource in its own file */\n  FOLDER_PER_CHART_FILE_PER_RESOURCE,\n}\n\nexport interface AppProps {\n  /**\n   * The directory to output Kubernetes manifests.\n   *\n   * If you synthesize your application using `cdk8s synth`, you must\n   * also pass this value to the CLI using the `--output` option or\n   * the `output` property in the `cdk8s.yaml` configuration file.\n   * Otherwise, the CLI will not know about the output directory,\n   * and synthesis will fail.\n   *\n   * This property is intended for internal and testing use.\n   *\n   * @default - CDK8S_OUTDIR if defined, otherwise \"dist\"\n   */\n  readonly outdir?: string;\n  /**\n   *  The file extension to use for rendered YAML files\n   * @default .k8s.yaml\n   */\n  readonly outputFileExtension?: string;\n  /**\n   *  How to divide the YAML output into files\n   * @default YamlOutputType.FILE_PER_CHART\n   */\n  readonly yamlOutputType?: YamlOutputType;\n\n  /**\n   * When set to true, the output directory will contain a `construct-metadata.json` file\n   * that holds construct related metadata on every resource in the app.\n   *\n   * @default false\n   */\n  readonly recordConstructMetadata?: boolean;\n\n  /**\n   * A list of resolvers that can be used to replace property values before\n   * they are written to the manifest file. When multiple resolvers are passed,\n   * they are invoked by order in the list, and only the first one that applies\n   * (e.g calls `context.replaceValue`) is invoked.\n   *\n   * @see https://cdk8s.io/docs/latest/basics/app/#resolvers\n   *\n   * @default - no resolvers.\n   */\n  readonly resolvers?: IResolver[];\n}\n\nclass SynthRequestCache {\n  public nodeChildrenCache: Map<Node, IConstruct[]> = new Map<Node, IConstruct[]>();\n\n  public findAll(node: Node): IConstruct[] {\n    if (this.nodeChildrenCache.has(node)) {\n      return this.nodeChildrenCache.get(node)!;\n    }\n\n    const children = node.findAll();\n    this.nodeChildrenCache.set(node, children);\n    return children;\n  }\n}\n\n/**\n * Represents a cdk8s application.\n */\nexport class App extends Construct {\n  /**\n   * Synthesize a single chart.\n   *\n   * Each element returned in the resulting array represents a different ApiObject\n   * in the scope of the chart.\n   *\n   * Note that the returned array order is important. It is determined by the various dependencies between\n   * the constructs in the chart, where the first element is the one without dependencies, and so on...\n   *\n   * @returns An array of JSON objects.\n   * @param chart the chart to synthesize.\n   * @internal\n   */\n  public static _synthChart(chart: Chart): any[] {\n\n    const app: App = App.of(chart);\n\n    const cache = new SynthRequestCache();\n\n    // we must prepare the entire app before synthesizing the chart\n    // because the dependency inference happens on the app level.\n    resolveDependencies(app, cache);\n\n    // validate the app since we want to call onValidate of the relevant constructs.\n    // note this will also call onValidate on constructs from possibly different charts,\n    // but thats ok too since we no longer treat constructs as a self-contained synthesis unit.\n    validate(app, cache);\n\n    return chartToKube(chart).map(obj => obj.toJson());\n  }\n\n  public static of(c: IConstruct): App {\n\n    const scope = c.node.scope;\n\n    if (!scope) {\n      // the app is the only construct without a scope.\n      return c as App;\n    }\n\n    return App.of(scope);\n  }\n\n  /**\n   * The output directory into which manifests will be synthesized.\n   */\n  public readonly outdir: string;\n\n  /**\n   *  The file extension to use for rendered YAML files\n   * @default .k8s.yaml\n   */\n  public readonly outputFileExtension: string;\n\n  /** How to divide the YAML output into files\n   * @default YamlOutputType.FILE_PER_CHART\n   */\n  public readonly yamlOutputType: YamlOutputType;\n\n  /**\n   * Resolvers used by this app. This includes both custom resolvers\n   * passed by the `resolvers` property, as well as built-in resolvers.\n   */\n  public readonly resolvers: IResolver[];\n\n  private readonly recordConstructMetadata: boolean;\n\n  /**\n   * Returns all the charts in this app, sorted topologically.\n   */\n  public get charts(): Chart[] {\n    const isChart = (x: IConstruct): x is Chart => x instanceof Chart;\n    return new DependencyGraph(this.node)\n      .topology()\n      .filter(isChart);\n  }\n\n  /**\n   * Defines an app\n   * @param props configuration options\n   */\n  constructor(props: AppProps = {}) {\n    super(undefined as any, '');\n    this.outdir = props.outdir ?? process.env.CDK8S_OUTDIR ?? 'dist';\n    this.outputFileExtension = props.outputFileExtension ?? '.k8s.yaml';\n    this.yamlOutputType = props.yamlOutputType ?? YamlOutputType.FILE_PER_CHART;\n    this.resolvers = [...(props.resolvers ?? []), new LazyResolver(), new ImplicitTokenResolver(), new NumberStringUnionResolver()];\n    this.recordConstructMetadata = props.recordConstructMetadata ?? (process.env.CDK8S_RECORD_CONSTRUCT_METADATA === 'true' ? true : false);\n\n  }\n\n  /**\n   * Synthesizes all manifests to the output directory\n   */\n  public synth(): void {\n\n    fs.mkdirSync(this.outdir, { recursive: true });\n\n    const cache = new SynthRequestCache();\n\n    // Since we plan on removing the distributed synth mechanism, we no longer call `Node.synthesize`, but rather simply implement\n    // the necessary operations. We do however want to preserve the distributed validation.\n    validate(this, cache);\n\n    // this is kind of sucky, eventually I would like the DependencyGraph\n    // to be able to answer this question.\n    const hasDependantCharts = resolveDependencies(this, cache);\n    const charts = this.charts;\n\n    switch (this.yamlOutputType) {\n      case YamlOutputType.FILE_PER_APP:\n        let apiObjectsList: ApiObject[] = [];\n\n        for (const chart of charts) {\n          apiObjectsList.push(...Object.values(chart.toJson()));\n        }\n\n        if (charts.length > 0) {\n          Yaml.save(\n            path.join(this.outdir, `app${this.outputFileExtension}`), // There is no \"app name\", so we just hardcode the file name\n            apiObjectsList);\n        }\n        break;\n\n      case YamlOutputType.FILE_PER_CHART:\n        const namer: ChartNamer = hasDependantCharts ? new IndexedChartNamer() : new SimpleChartNamer();\n        for (const chart of charts) {\n          const chartName = namer.name(chart);\n          const objects = Object.values(chart.toJson());\n          Yaml.save(path.join(this.outdir, chartName + this.outputFileExtension), objects);\n        }\n        break;\n\n      case YamlOutputType.FILE_PER_RESOURCE:\n        for (const chart of charts) {\n          const apiObjects = Object.values(chart.toJson());\n\n          apiObjects.forEach((apiObject) => {\n            if (!(apiObject === undefined)) {\n              const fileName = `${`${apiObject.kind}.${apiObject.metadata.name}`\n                .replace(/[^0-9a-zA-Z-_.]/g, '')}`;\n              Yaml.save(path.join(this.outdir, fileName + this.outputFileExtension), [apiObject]);\n            }\n          });\n        }\n        break;\n\n      case YamlOutputType.FOLDER_PER_CHART_FILE_PER_RESOURCE:\n        const folderNamer: ChartNamer = hasDependantCharts ? new IndexedChartFolderNamer() : new SimpleChartFolderNamer();\n        for (const chart of charts) {\n          const chartName = folderNamer.name(chart);\n          const apiObjects = chartToKube(chart);\n          const fullOutDir = path.join(this.outdir, chartName);\n          fs.mkdirSync(fullOutDir, { recursive: true });\n\n          apiObjects.forEach((apiObject) => {\n            if (!(apiObject === undefined)) {\n              const fileName = `${`${apiObject.kind}.${apiObject.metadata.name}`\n                .replace(/[^0-9a-zA-Z-_.]/g, '')}`;\n              Yaml.save(path.join(fullOutDir, fileName + this.outputFileExtension), [apiObject.toJson()]);\n            }\n          });\n        }\n        break;\n\n      default:\n        break;\n    }\n\n    if (this.recordConstructMetadata) {\n      const allObjects = this.charts.flatMap(chartToKube);\n      this.writeConstructMetadata(allObjects);\n    }\n\n  }\n\n  /**\n   * Synthesizes the app into a YAML string.\n   *\n   * @returns A string with all YAML objects across all charts in this app.\n   */\n  public synthYaml(): string {\n    const cache = new SynthRequestCache();\n\n    resolveDependencies(this, cache);\n\n    validate(this, cache);\n\n    const charts = this.charts;\n    const docs: any[] = [];\n\n    for (const chart of charts) {\n      docs.push(...Object.values(chart.toJson()));\n    }\n\n    return Yaml.stringify(...docs);\n  }\n\n  private writeConstructMetadata(apiObjects: ApiObject[]) {\n    const resources: { [key: string]: any } = {};\n    for (const apiObject of apiObjects) {\n      resources[apiObject.name] = { path: apiObject.node.path };\n    }\n    fs.writeFileSync(path.join(this.outdir, 'construct-metadata.json'), JSON.stringify({\n      version: '1.0.0',\n      resources: resources,\n    }));\n  }\n}\n\nfunction validate(app: App, cache: SynthRequestCache) {\n  const errors = [];\n  for (const child of cache.findAll(app.node)) {\n    const childErrors = child.node.validate();\n    for (const error of childErrors) {\n      errors.push(`[${child.node.path}] ${error}`);\n    }\n  }\n\n  if (errors.length > 0) {\n    throw new Error(`Validation failed with the following errors:\\n  ${errors.join('\\n  ')}`);\n  }\n}\n\nfunction buildDependencies(app: App, cache: SynthRequestCache) {\n\n  const deps = [];\n  for (const child of cache.findAll(app.node)) {\n    for (const dep of child.node.dependencies) {\n      deps.push({ source: child, target: dep });\n    }\n  }\n\n  return deps;\n\n}\n\nfunction resolveDependencies(app: App, cache: SynthRequestCache) {\n\n  let hasDependantCharts = false;\n\n  // create an explicit chart dependency from nested chart relationships\n  for (const parentChart of cache.findAll(app.node).filter(x => x instanceof Chart)) {\n    for (const childChart of parentChart.node.children.filter(x => x instanceof Chart)) {\n      parentChart.node.addDependency(childChart);\n      hasDependantCharts = true;\n    }\n  }\n\n  // create an explicit chart dependency from implicit construct dependencies\n  for (const dep of buildDependencies(app, cache)) {\n\n    const sourceChart = Chart.of(dep.source);\n    const targetChart = Chart.of(dep.target);\n\n    if (sourceChart !== targetChart) {\n      sourceChart.node.addDependency(targetChart);\n      hasDependantCharts = true;\n    }\n\n  }\n\n  // create explicit api object dependencies from implicit construct dependencies\n  for (const dep of buildDependencies(app, cache)) {\n\n    const sourceChart = Chart.of(dep.source);\n    const targetChart = Chart.of(dep.target);\n\n    const targetApiObjects = cache.findAll(dep.target.node).filter(c => c instanceof ApiObject).filter(x => Chart.of(x) === targetChart);\n    const sourceApiObjects = cache.findAll(dep.source.node).filter(c => c instanceof ApiObject).filter(x => Chart.of(x) === sourceChart);\n\n    for (const target of targetApiObjects) {\n      for (const source of sourceApiObjects) {\n        if (target !== source) {\n          source.node.addDependency(target);\n        }\n      }\n    }\n  }\n\n  return hasDependantCharts;\n\n}\n\nfunction chartToKube(chart: Chart) {\n  return new DependencyGraph(chart.node).topology()\n    .filter(x => x instanceof ApiObject)\n    .filter(x => Chart.of(x) === chart) // include an object only in its closest parent chart\n    .map(x => (x as ApiObject));\n}\n\ninterface ChartNamer {\n  name(chart: Chart): string;\n}\n\nclass SimpleChartNamer implements ChartNamer {\n  constructor() {\n  }\n\n  public name(chart: Chart) {\n    return `${Names.toDnsLabel(chart)}`;\n  }\n}\n\nclass IndexedChartNamer extends SimpleChartNamer implements ChartNamer {\n  private index: number = 0;\n  constructor() {\n    super();\n  }\n\n  public name(chart: Chart) {\n    const name = `${this.index.toString().padStart(4, '0')}-${super.name(chart)}`;\n    this.index++;\n    return name;\n  }\n}\n\nclass SimpleChartFolderNamer implements ChartNamer {\n  constructor() {\n  }\n\n  public name(chart: Chart) {\n    return Names.toDnsLabel(chart);\n  }\n}\n\nclass IndexedChartFolderNamer extends SimpleChartFolderNamer implements ChartNamer {\n  private index: number = 0;\n  constructor() {\n    super();\n  }\n\n  public name(chart: Chart) {\n    const name = `${this.index.toString().padStart(4, '0')}-${super.name(chart)}`;\n    this.index++;\n    return name;\n  }\n}\n"]}