如何解决我可以在Kubernetes中将YAML代码部署为没有YAML文件的文件吗
通过使用kubectl apply
或使用helm install
一次部署所有YAML文件,可以轻松地在Kubernetes中部署YAML文件,但是我正在寻找一种方式来部署YAML文件而不实际创建文件并直接通过nodeJS代码进行部署
我现在正在做什么:
我能够部署由我的nodeJS代码创建的YAML文件,该代码首先创建将其解析为YAML的JSON对象,然后生成其YAML文件,并且相同的代码也能够部署这些文件。
我需要什么:
我希望能够直接部署YAML代码而不创建其YAML文件。
解决方法
要从命令行申请,请使用:
node-js-generate-yaml-command | kubectl apply -f -
或者直接从代码中使用kubectl javascript客户端https://github.com/kubernetes-client/javascript
kubectl apply
的示例可在此处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;
}
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