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توضیحات

Create Kubernetes CRD Operators using CDK8s Constructs

ویژگی	مقدار
سیستم عامل	-
نام فایل	cdk8s-operator-0.1.99
نام	cdk8s-operator
نسخه کتابخانه	0.1.99
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Amazon Web Services
ایمیل نویسنده	-
آدرس صفحه اصلی	https://github.com/cdk8s-team/cdk8s-operator.git
آدرس اینترنتی	https://pypi.org/project/cdk8s-operator/
مجوز	Apache-2.0

# cdk8s-operator > Create Kubernetes CRD Operators using CDK8s Constructs This is a multi-language (jsii) library and a command-line tool that allows you to create Kubernetes operators for CRDs (Custom Resource Definitions) using CDK8s. ## Getting Started Let's create our first CRD served by a CDK8s construct using TypeScript. ### Install CDK8s Make sure your system has the required CDK8s [prerequisites](https://cdk8s.io/docs/latest/getting-started/#prerequisites). Install the CDK8s CLI globally through npm: ```shell $ npm i -g cdk8s-cli Installing... # Verify installation $ cdk8s --version 1.0.0-beta.3 ``` ### Create a new CDK8s app Now, let's create a new CDK8s typescript app: ```shell mkdir hello-operator && cd hello-operator git init cdk8s init typescript-app ``` ### Install cdk8s-operator Next, let's install this module as a dependency of our TypeScript project: ```shell npm install cdk8s-operator ``` ### Construct We will start by creating the construct that implements the abstraction. This is is just a normal CDK8s custom construct: Let's create a construct called `PodCollection` which represents a collection of pods: `pod-collection.ts`: ```python import { Pod } from 'cdk8s-plus-17'; import { Construct } from 'constructs'; export interface PodCollectionProps { /** Number of pods */ readonly count: number; /** The docker image to deploy */ readonly image: string; } export class PodCollection extends Construct { constructor(scope: Construct, id: string, props: PodCollectionProps) { super(scope, id); for (let i = 0; i < props.count; ++i) { new Pod(this, `pod-${i}`, { containers: [ { image: props.image } ] }); } } } ``` ### Operator App Now, we will need to replace out `main.ts` file with an "operator app", which is a special kind of CDK8s app designed to be executed by the `cdk8s-server` CLI which is included in this module. The `Operator` app construct can be used to create "CDK8s Operators" which are CDK8s apps that accept input from a file (or STDIN) with a Kubernetes manifest, instantiates a construct with the `spec` as its input and emits the resulting manifest to STDOUT. Replace the contents of `main.ts` with the following. We initialize an `Operator` app and then register a provider which handles resources of API version `samples.cdk8s.org/v1alpha1` and kind `PodCollection`. `main.ts`: ```python import { Operator } from 'cdk8s-operator'; import { PodCollection } from './pod-collection'; const app = new Operator(); app.addProvider({ apiVersion: 'samples.cdk8s.org/v1alpha1', kind: 'PodCollection', handler: { apply: (scope, id, props) => new PodCollection(scope, id, props) } }) app.synth(); ``` > A single operator can handle any number of resource kinds. Simply call > `addProvider()` for each apiVersion/kind. ## Using Operators To use this operator, create an `input.json` file, e.g: `input.json`: ```json { "apiVersion": "samples.cdk8s.org/v1alpha1", "kind": "PodCollection", "metadata": { "name": "my-collection" }, "spec": { "image": "paulbouwer/hello-kubernetes", "count": 5 } } ``` Compile your code: ```shell # delete `main.test.ts` since it has some code that won't compile $ rm -f main.test.* # compile $ npm run compile ``` And run: ```shell $ node main.js input.json ``` <details> <summary>STDOUT</summary> ```yaml apiVersion: "v1" kind: "Pod" metadata: name: "my-collection-pod-0-c8735c52" spec: containers: - env: [] image: "paulbouwer/hello-kubernetes" imagePullPolicy: "Always" name: "main" ports: [] volumeMounts: [] volumes: [] --- apiVersion: "v1" kind: "Pod" metadata: name: "my-collection-pod-1-c89f58d7" spec: containers: - env: [] image: "paulbouwer/hello-kubernetes" imagePullPolicy: "Always" name: "main" ports: [] volumeMounts: [] volumes: [] --- apiVersion: "v1" kind: "Pod" metadata: name: "my-collection-pod-2-c88d4268" spec: containers: - env: [] image: "paulbouwer/hello-kubernetes" imagePullPolicy: "Always" name: "main" ports: [] volumeMounts: [] volumes: [] --- apiVersion: "v1" kind: "Pod" metadata: name: "my-collection-pod-3-c86866b1" spec: containers: - env: [] image: "paulbouwer/hello-kubernetes" imagePullPolicy: "Always" name: "main" ports: [] volumeMounts: [] volumes: [] --- apiVersion: "v1" kind: "Pod" metadata: name: "my-collection-pod-4-c8b74b1d" spec: containers: - env: [] image: "paulbouwer/hello-kubernetes" imagePullPolicy: "Always" name: "main" ports: [] volumeMounts: [] volumes: [] ``` </details> ## `cdk8s-server` This library is shipped with a program called `cdk8s-server` which can be used to host your operator inside an HTTP server. This server can be used as a sidecar container with a generic CRD operator (TBD). ```shell $ PORT=8080 npx cdk8s-server Listening on 8080 - App command: node main.js - Request body should include a single k8s resource in JSON format - Request will be piped through STDIN to "node main.js" - Response is the STDOUT and expected to be a multi-resource yaml manifest ``` Now, you can send `input.json` over HTTP: ```shell $ curl -d @input.json http://localhost:8080 MANIFEST... ``` ## License Apache 2.0

نیازمندی

مقدار	نام
<3.0.0,>=2.7.56	cdk8s
<11.0.0,>=10.0.0	constructs
<2.0.0,>=1.80.0	jsii
>=0.0.3	publication
~=2.13.3	typeguard

زبان مورد نیاز

مقدار	نام
~=3.7	Python

نحوه نصب

نصب پکیج whl cdk8s-operator-0.1.99:

pip install cdk8s-operator-0.1.99.whl

نصب پکیج tar.gz cdk8s-operator-0.1.99:

pip install cdk8s-operator-0.1.99.tar.gz