spam-configmaps.js

const { execSync } = require('child_process');

/**
 * Create a bunch of configmaps for load testing.
 */
new Array(10000).fill(0).forEach((_, i) => {
  const configMap = {
    apiVersion: 'v1',
    kind: 'ConfigMap',
    metadata: {
      namespace: 'load-test',
      name: `test-${i}`,
    },
    data: {
      key: 'val',
    }
  };

  const result = execSync(`echo '${JSON.stringify(configMap)}' | kubectl create -f - `).toString().trim();
  console.log(result);
});