test: add wait f/ metrics-server to serve Pepr metrics

hack/load.cli.ts

@@ -438,7 +438,7 @@ program
     log(await cmd.run(), "");
 
     //
-    // run test
+    // run deploy
     //
 
     log(`Pepr CLI version`);
@@ -479,6 +479,27 @@ program
     });
     log({ cmd: cmd.cmd, cwd: cmd.cwd, env });
     log(await cmd.run(), "");
+
+    log(`Wait for metrics on the Pepr controller to become available`);
+    const start = Date.now();
+    const max = lib.toMs("2m");
+    while (true) {
+      const now = Date.now();
+      const dur = now - start;
+      if (dur > max) {
+        console.error(`Timeout waiting for metrics-server to be ready.`);
+        process.exit(1);
+      }
+
+      cmd = new Cmd({ cmd: `kubectl top --namespace pepr-system pod --no-headers`, env });
+      let res = await cmd.runRaw();
+      if (res.exitcode === 0) {
+        log({ max: lib.toHuman(max), actual: lib.toHuman(dur) }, "");
+        break;
+      }
+
+      await nap(lib.toMs("5s"));
+    }
   });
 
 program