cdk8s-plus-25
Version:
cdk8s+ is a software development framework that provides high level abstractions for authoring Kubernetes applications. cdk8s-plus-25 synthesizes Kubernetes manifests for Kubernetes 1.25.0
214 lines • 31.5 kB
JavaScript
"use strict";
var _a, _b, _c;
Object.defineProperty(exports, "__esModule", { value: true });
exports.DeploymentStrategy = exports.PercentOrAbsolute = exports.Deployment = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
const cdk8s_1 = require("cdk8s");
const container = require("./container");
const k8s = require("./imports/k8s");
const service = require("./service");
const workload = require("./workload");
/**
*
* A Deployment provides declarative updates for Pods and ReplicaSets.
*
* You describe a desired state in a Deployment, and the Deployment Controller changes the actual
* state to the desired state at a controlled rate. You can define Deployments to create new ReplicaSets, or to remove
* existing Deployments and adopt all their resources with new Deployments.
*
* > Note: Do not manage ReplicaSets owned by a Deployment. Consider opening an issue in the main Kubernetes repository if your use case is not covered below.
*
* Use Case
*
* The following are typical use cases for Deployments:
*
* - Create a Deployment to rollout a ReplicaSet. The ReplicaSet creates Pods in the background.
* Check the status of the rollout to see if it succeeds or not.
* - Declare the new state of the Pods by updating the PodTemplateSpec of the Deployment.
* A new ReplicaSet is created and the Deployment manages moving the Pods from the old ReplicaSet to the new one at a controlled rate.
* Each new ReplicaSet updates the revision of the Deployment.
* - Rollback to an earlier Deployment revision if the current state of the Deployment is not stable.
* Each rollback updates the revision of the Deployment.
* - Scale up the Deployment to facilitate more load.
* - Pause the Deployment to apply multiple fixes to its PodTemplateSpec and then resume it to start a new rollout.
* - Use the status of the Deployment as an indicator that a rollout has stuck.
* - Clean up older ReplicaSets that you don't need anymore.
*
**/
class Deployment extends workload.Workload {
constructor(scope, id, props = {}) {
super(scope, id, props);
this.resourceType = 'deployments';
this.hasAutoscaler = false;
this.apiObject = new k8s.KubeDeployment(this, 'Resource', {
metadata: props.metadata,
spec: cdk8s_1.Lazy.any({ produce: () => this._toKube() }),
});
this.minReady = props.minReady ?? cdk8s_1.Duration.seconds(0);
this.progressDeadline = props.progressDeadline ?? cdk8s_1.Duration.seconds(600);
if (this.progressDeadline.toSeconds() <= this.minReady.toSeconds()) {
throw new Error(`'progressDeadline' (${this.progressDeadline.toSeconds()}s) must be greater than 'minReady' (${this.minReady.toSeconds()}s)`);
}
this.replicas = props.replicas;
this.strategy = props.strategy ?? DeploymentStrategy.rollingUpdate();
if (this.isolate) {
this.connections.isolate();
}
}
/**
* Expose a deployment via a service.
*
* This is equivalent to running `kubectl expose deployment <deployment-name>`.
*
* @param options Options to determine details of the service and port exposed.
*/
exposeViaService(options = {}) {
const myPorts = container.extractContainerPorts(this);
const myPortNumbers = myPorts.map(p => p.number);
const ports = options.ports ?? myPorts.map(p => ({
port: p.number, targetPort: p.number, protocol: p.protocol, name: p.name,
}));
if (ports.length === 0) {
throw new Error(`Unable to expose deployment ${this.name} via a service: `
+ 'Deployment port cannot be determined.'
+ 'Either pass \'ports\', or configure ports on the containers of the deployment');
}
const portNames = ports.map(p => p.name);
if (ports.length > 1 && portNames.includes(undefined)) {
throw new Error(`Unable to expose deployment ${this.name} via a service: `
+ 'When using multiple ports for a service, all ports must have port names so they are unambiguous.');
}
// validate the ports are owned by our containers
for (const port of ports) {
const targetPort = port.targetPort ?? port.port;
if (!myPortNumbers.includes(targetPort)) {
throw new Error(`Unable to expose deployment ${this.name} via a service: Port ${targetPort} is not exposed by any container`);
}
}
const metadata = { namespace: this.metadata.namespace };
if (options.name) {
metadata.name = options.name;
}
return new service.Service(this, `${options.name ?? ''}Service`, {
selector: this,
ports,
metadata,
type: options.serviceType ?? service.ServiceType.CLUSTER_IP,
});
}
/**
* Expose a deployment via an ingress.
*
* This will first expose the deployment with a service, and then expose the service via an ingress.
*
* @param path The ingress path to register under.
* @param options Additional options.
*/
exposeViaIngress(path, options = {}) {
const ser = this.exposeViaService(options);
return ser.exposeViaIngress(path, options);
}
/**
* @internal
*/
_toKube() {
return {
replicas: this.hasAutoscaler ? undefined : (this.replicas ?? 2),
minReadySeconds: this.minReady.toSeconds(),
progressDeadlineSeconds: this.progressDeadline.toSeconds(),
template: {
metadata: this.podMetadata.toJson(),
spec: this._toPodSpec(),
},
selector: this._toLabelSelector(),
strategy: this.strategy._toKube(),
};
}
/**
* @see IScalable.markHasAutoscaler()
*/
markHasAutoscaler() {
this.hasAutoscaler = true;
}
/**
* @see IScalable.toScalingTarget()
*/
toScalingTarget() {
return {
kind: this.apiObject.kind,
apiVersion: this.apiObject.apiVersion,
name: this.name,
containers: this.containers,
replicas: this.replicas,
};
}
}
exports.Deployment = Deployment;
_a = JSII_RTTI_SYMBOL_1;
Deployment[_a] = { fqn: "cdk8s-plus-25.Deployment", version: "2.22.79" };
/**
* Union like class repsenting either a ration in
* percents or an absolute number.
*/
class PercentOrAbsolute {
constructor(value) {
this.value = value;
}
/**
* Percent ratio.
*/
static percent(percent) {
return new PercentOrAbsolute(`${percent}%`);
}
/**
* Absolute number.
*/
static absolute(num) {
return new PercentOrAbsolute(num);
}
isZero() {
return this.value === PercentOrAbsolute.absolute(0).value || this.value === PercentOrAbsolute.percent(0).value;
}
}
exports.PercentOrAbsolute = PercentOrAbsolute;
_b = JSII_RTTI_SYMBOL_1;
PercentOrAbsolute[_b] = { fqn: "cdk8s-plus-25.PercentOrAbsolute", version: "2.22.79" };
/**
* Deployment strategies.
*/
class DeploymentStrategy {
constructor(strategy) {
this.strategy = strategy;
}
/**
* All existing Pods are killed before new ones are created.
*
* @see https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#recreate-deployment
*/
static recreate() {
return new DeploymentStrategy({
type: 'Recreate',
});
}
static rollingUpdate(options = {}) {
const maxSurge = options.maxSurge ?? PercentOrAbsolute.percent(25);
const maxUnavailable = options.maxUnavailable ?? PercentOrAbsolute.percent(25);
if (maxSurge.isZero() && maxUnavailable.isZero()) {
throw new Error('\'maxSurge\' and \'maxUnavailable\' cannot be both zero');
}
return new DeploymentStrategy({
type: 'RollingUpdate',
rollingUpdate: { maxSurge, maxUnavailable },
});
}
/**
* @internal
*/
_toKube() {
return this.strategy;
}
}
exports.DeploymentStrategy = DeploymentStrategy;
_c = JSII_RTTI_SYMBOL_1;
DeploymentStrategy[_c] = { fqn: "cdk8s-plus-25.DeploymentStrategy", version: "2.22.79" };
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{ ApiObject, Lazy, Duration } from 'cdk8s';\nimport { Construct } from 'constructs';\nimport * as container from './container';\nimport { IScalable, ScalingTarget } from './horizontal-pod-autoscaler';\nimport * as k8s from './imports/k8s';\nimport * as ingress from './ingress';\nimport * as service from './service';\nimport * as workload from './workload';\n\n/**\n * Properties for `Deployment`.\n */\nexport interface DeploymentProps extends workload.WorkloadProps {\n\n  /**\n   * Number of desired pods.\n   *\n   * @default 2\n   */\n  readonly replicas?: number;\n\n  /**\n   * Specifies the strategy used to replace old Pods by new ones.\n   *\n   * @default - RollingUpdate with maxSurge and maxUnavailable set to 25%.\n   */\n  readonly strategy?: DeploymentStrategy;\n\n  /**\n   * Minimum duration for which a newly created pod should be ready without\n   * any of its container crashing, for it to be considered available.\n   *\n   * Zero means the pod will be considered available as soon as it is ready.\n   *\n   * @see https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#min-ready-seconds\n   * @default Duration.seconds(0)\n   */\n  readonly minReady?: Duration;\n\n  /**\n   * The maximum duration for a deployment to make progress before it\n   * is considered to be failed. The deployment controller will continue\n   * to process failed deployments and a condition with a ProgressDeadlineExceeded\n   * reason will be surfaced in the deployment status.\n   *\n   * Note that progress will not be estimated during the time a deployment is paused.\n   *\n   * @see https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#progress-deadline-seconds\n   * @default Duration.seconds(600)\n   */\n  readonly progressDeadline?: Duration;\n\n}\n\n/**\n * Options for `Deployment.exposeViaService`.\n */\nexport interface DeploymentExposeViaServiceOptions {\n  /**\n   * The ports that the service should bind to.\n   *\n   * @default - extracted from the deployment.\n   */\n  readonly ports?: service.ServicePort[];\n\n  /**\n   * The type of the exposed service.\n   *\n   * @default - ClusterIP.\n   */\n  readonly serviceType?: service.ServiceType;\n\n  /**\n   * The name of the service to expose.\n   * If you'd like to expose the deployment multiple times,\n   * you must explicitly set a name starting from the second expose call.\n   *\n   * @default - auto generated.\n   */\n  readonly name?: string;\n}\n\n/**\n * Options for exposing a deployment via an ingress.\n */\nexport interface ExposeDeploymentViaIngressOptions extends DeploymentExposeViaServiceOptions, service.ExposeServiceViaIngressOptions {}\n\n/**\n*\n* A Deployment provides declarative updates for Pods and ReplicaSets.\n*\n* You describe a desired state in a Deployment, and the Deployment Controller changes the actual\n* state to the desired state at a controlled rate. You can define Deployments to create new ReplicaSets, or to remove\n* existing Deployments and adopt all their resources with new Deployments.\n*\n* > Note: Do not manage ReplicaSets owned by a Deployment. Consider opening an issue in the main Kubernetes repository if your use case is not covered below.\n*\n* Use Case\n*\n* The following are typical use cases for Deployments:\n*\n* - Create a Deployment to rollout a ReplicaSet. The ReplicaSet creates Pods in the background.\n*   Check the status of the rollout to see if it succeeds or not.\n* - Declare the new state of the Pods by updating the PodTemplateSpec of the Deployment.\n*   A new ReplicaSet is created and the Deployment manages moving the Pods from the old ReplicaSet to the new one at a controlled rate.\n*   Each new ReplicaSet updates the revision of the Deployment.\n* - Rollback to an earlier Deployment revision if the current state of the Deployment is not stable.\n*   Each rollback updates the revision of the Deployment.\n* - Scale up the Deployment to facilitate more load.\n* - Pause the Deployment to apply multiple fixes to its PodTemplateSpec and then resume it to start a new rollout.\n* - Use the status of the Deployment as an indicator that a rollout has stuck.\n* - Clean up older ReplicaSets that you don't need anymore.\n*\n**/\nexport class Deployment extends workload.Workload implements IScalable {\n\n  /**\n   * Number of desired pods.\n   */\n  public readonly replicas?: number;\n\n  /**\n   * Minimum duration for which a newly created pod should be ready without\n   * any of its container crashing, for it to be considered available.\n   */\n  public readonly minReady: Duration;\n\n  /**\n   * The maximum duration for a deployment to make progress before it is considered to be failed.\n   */\n  public readonly progressDeadline: Duration;\n\n  /*\n   * The upgrade strategy of this deployment.\n   */\n  public readonly strategy: DeploymentStrategy;\n\n  /**\n   * @see base.Resource.apiObject\n   */\n  protected readonly apiObject: ApiObject;\n\n  public readonly resourceType = 'deployments';\n\n  public hasAutoscaler = false;\n\n  constructor(scope: Construct, id: string, props: DeploymentProps = {}) {\n    super(scope, id, props);\n\n    this.apiObject = new k8s.KubeDeployment(this, 'Resource', {\n      metadata: props.metadata,\n      spec: Lazy.any({ produce: () => this._toKube() }),\n    });\n\n    this.minReady = props.minReady ?? Duration.seconds(0);\n    this.progressDeadline = props.progressDeadline ?? Duration.seconds(600);\n\n    if (this.progressDeadline.toSeconds() <= this.minReady.toSeconds()) {\n      throw new Error(`'progressDeadline' (${this.progressDeadline.toSeconds()}s) must be greater than 'minReady' (${this.minReady.toSeconds()}s)`);\n    }\n\n    this.replicas = props.replicas;\n    this.strategy = props.strategy ?? DeploymentStrategy.rollingUpdate();\n\n    if (this.isolate) {\n      this.connections.isolate();\n    }\n  }\n\n  /**\n   * Expose a deployment via a service.\n   *\n   * This is equivalent to running `kubectl expose deployment <deployment-name>`.\n   *\n   * @param options Options to determine details of the service and port exposed.\n   */\n  public exposeViaService(options: DeploymentExposeViaServiceOptions = {}): service.Service {\n    const myPorts = container.extractContainerPorts(this);\n    const myPortNumbers = myPorts.map(p => p.number);\n    const ports: service.ServicePort[] = options.ports ?? myPorts.map(p => ({\n      port: p.number, targetPort: p.number, protocol: p.protocol, name: p.name,\n    }));\n    if (ports.length === 0) {\n      throw new Error(`Unable to expose deployment ${this.name} via a service: `\n        + 'Deployment port cannot be determined.'\n        + 'Either pass \\'ports\\', or configure ports on the containers of the deployment');\n    }\n    const portNames = ports.map(p => p.name);\n    if (ports.length > 1 && portNames.includes(undefined)) {\n      throw new Error(`Unable to expose deployment ${this.name} via a service: `\n        + 'When using multiple ports for a service, all ports must have port names so they are unambiguous.');\n    }\n\n    // validate the ports are owned by our containers\n    for (const port of ports) {\n      const targetPort = port.targetPort ?? port.port;\n      if (!myPortNumbers.includes(targetPort)) {\n        throw new Error(`Unable to expose deployment ${this.name} via a service: Port ${targetPort} is not exposed by any container`);\n      }\n    }\n\n    const metadata: any = { namespace: this.metadata.namespace };\n    if (options.name) {\n      metadata.name = options.name;\n    }\n    return new service.Service(this, `${options.name ?? ''}Service`, {\n      selector: this,\n      ports,\n      metadata,\n      type: options.serviceType ?? service.ServiceType.CLUSTER_IP,\n    });\n  }\n\n  /**\n   * Expose a deployment via an ingress.\n   *\n   * This will first expose the deployment with a service, and then expose the service via an ingress.\n   *\n   * @param path The ingress path to register under.\n   * @param options Additional options.\n   */\n  public exposeViaIngress(path: string, options: ExposeDeploymentViaIngressOptions = {}): ingress.Ingress {\n    const ser = this.exposeViaService(options);\n    return ser.exposeViaIngress(path, options);\n  }\n\n  /**\n   * @internal\n   */\n  public _toKube(): k8s.DeploymentSpec {\n    return {\n      replicas: this.hasAutoscaler ? undefined : (this.replicas ?? 2),\n      minReadySeconds: this.minReady.toSeconds(),\n      progressDeadlineSeconds: this.progressDeadline.toSeconds(),\n      template: {\n        metadata: this.podMetadata.toJson(),\n        spec: this._toPodSpec(),\n      },\n      selector: this._toLabelSelector(),\n      strategy: this.strategy._toKube(),\n    };\n  }\n\n  /**\n   * @see IScalable.markHasAutoscaler()\n   */\n  public markHasAutoscaler() {\n    this.hasAutoscaler = true;\n  }\n\n  /**\n   * @see IScalable.toScalingTarget()\n   */\n  public toScalingTarget(): ScalingTarget {\n    return {\n      kind: this.apiObject.kind,\n      apiVersion: this.apiObject.apiVersion,\n      name: this.name,\n      containers: this.containers,\n      replicas: this.replicas,\n    };\n  }\n}\n\n/**\n * Options for `DeploymentStrategy.rollingUpdate`.\n */\nexport interface DeploymentStrategyRollingUpdateOptions {\n\n  /**\n   * The maximum number of pods that can be scheduled above the desired number of pods.\n   * Value can be an absolute number (ex: 5) or a percentage of desired pods (ex: 10%).\n   * Absolute number is calculated from percentage by rounding up.\n   * This can not be 0 if `maxUnavailable` is 0.\n   *\n   * Example: when this is set to 30%, the new ReplicaSet can be scaled up immediately when the rolling update\n   * starts, such that the total number of old and new pods do not exceed 130% of desired pods.\n   * Once old pods have been killed, new ReplicaSet can be scaled up further, ensuring that\n   * total number of pods running at any time during the update is at most 130% of desired pods.\n   *\n   * @default '25%'\n   */\n  readonly maxSurge?: PercentOrAbsolute;\n\n  /**\n   * The maximum number of pods that can be unavailable during the update.\n   * Value can be an absolute number (ex: 5) or a percentage of desired pods (ex: 10%).\n   * Absolute number is calculated from percentage by rounding down.\n   * This can not be 0 if `maxSurge` is 0.\n   *\n   * Example: when this is set to 30%, the old ReplicaSet can be scaled down to 70% of desired\n   * pods immediately when the rolling update starts. Once new pods are ready, old ReplicaSet can\n   * be scaled down further, followed by scaling up the new ReplicaSet, ensuring that the total\n   * number of pods available at all times during the update is at least 70% of desired pods.\n   *\n   * @default '25%'\n   */\n  readonly maxUnavailable?: PercentOrAbsolute;\n\n}\n\n/**\n * Union like class repsenting either a ration in\n * percents or an absolute number.\n */\nexport class PercentOrAbsolute {\n\n  /**\n   * Percent ratio.\n   */\n  public static percent(percent: number): PercentOrAbsolute {\n    return new PercentOrAbsolute(`${percent}%`);\n  }\n\n  /**\n   * Absolute number.\n   */\n  public static absolute(num: number): PercentOrAbsolute {\n    return new PercentOrAbsolute(num);\n  }\n\n  private constructor(public readonly value: any) {}\n\n  public isZero(): boolean {\n    return this.value === PercentOrAbsolute.absolute(0).value || this.value === PercentOrAbsolute.percent(0).value;\n  }\n\n}\n\n/**\n * Deployment strategies.\n */\nexport class DeploymentStrategy {\n\n  /**\n   * All existing Pods are killed before new ones are created.\n   *\n   * @see https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#recreate-deployment\n   */\n  public static recreate(): DeploymentStrategy {\n    return new DeploymentStrategy({\n      type: 'Recreate',\n    });\n  }\n\n  public static rollingUpdate(options: DeploymentStrategyRollingUpdateOptions = {}): DeploymentStrategy {\n\n    const maxSurge = options.maxSurge ?? PercentOrAbsolute.percent(25);\n    const maxUnavailable = options.maxUnavailable ?? PercentOrAbsolute.percent(25);\n\n    if (maxSurge.isZero() && maxUnavailable.isZero()) {\n      throw new Error('\\'maxSurge\\' and \\'maxUnavailable\\' cannot be both zero');\n    }\n\n    return new DeploymentStrategy({\n      type: 'RollingUpdate',\n      rollingUpdate: { maxSurge, maxUnavailable },\n    });\n  }\n\n  private constructor(private readonly strategy: k8s.DeploymentStrategy) {}\n\n  /**\n   * @internal\n   */\n  public _toKube(): k8s.DeploymentStrategy {\n    return this.strategy;\n  }\n\n}\n"]}