我可以在Kubernetes中将YAML代码部署为没有YAML文件的文件吗

Question

通过使用kubectl apply或使用helm install一次部署所有YAML文件，可以在Kubernetes中轻松部署YAML文件。但我正在寻找一种方法，通过这种方法，我可以在不实际创建文件的情况下部署YAML文件，并直接通过nodeJS代码进行部署

我现在在做什么：

我可以部署由我的nodeJS代码创建的YAML文件，该代码首先创建JSON对象并将其解析为YAML，然后生成其YAML文件。同样的代码也可以部署这些文件。

我需要什么：

我希望能够直接部署YAML代码，而无需创建其YAML文件。

Answer 1

要从命令行应用，请使用：

node-js-generate-yaml-command | kubectl apply -f -

或者直接从代码使用kubectl javascript客户端https://github.com/kubernetes-client/javascript

kubectl apply的例子可以在这里找到https://github.com/kubernetes-client/javascript/blob/master/examples/typescript/apply/apply-example.ts

import * as k8s from '@kubernetes/client-node';
import * as fs from 'fs';
import * as yaml from 'js-yaml';
import { promisify } from 'util';
/**
* Replicate the functionality of `kubectl apply`.  That is, create the resources defined in the `specFile` if they do
* not exist, patch them if they do exist.
*
* @param specPath File system path to a YAML Kubernetes spec.
* @return Array of resources created
*/
export async function apply(specPath: string): Promise<k8s.KubernetesObject[]> {
const kc = new k8s.KubeConfig();
kc.loadFromDefault();
const client = k8s.KubernetesObjectApi.makeApiClient(kc);
const fsReadFileP = promisify(fs.readFile);
const specString = await fsReadFileP(specPath, 'utf8');
const specs: k8s.KubernetesObject[] = yaml.safeLoadAll(specString);
const validSpecs = specs.filter((s) => s && s.kind && s.metadata);
const created: k8s.KubernetesObject[] = [];
for (const spec of validSpecs) {
// this is to convince the old version of TypeScript that metadata exists even though we already filtered specs
// without metadata out
spec.metadata = spec.metadata || {};
spec.metadata.annotations = spec.metadata.annotations || {};
delete spec.metadata.annotations['kubectl.kubernetes.io/last-applied-configuration'];
spec.metadata.annotations['kubectl.kubernetes.io/last-applied-configuration'] = JSON.stringify(spec);
try {
// try to get the resource, if it does not exist an error will be thrown and we will end up in the catch
// block.
await client.read(spec);
// we got the resource, so it exists, so patch it
const response = await client.patch(spec);
created.push(response.body);
} catch (e) {
// we did not get the resource, so it does not exist, so create it
const response = await client.create(spec);
created.push(response.body);
}
}
return created;
}