networking VMs (WIP)

packages/system/virt/tests/rhai/05_cloudhv_diag.rhai

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+// Cloud Hypervisor diagnostic script
+// Creates a VM, starts CH, verifies PID, API socket, ch-remote info, and tails logs.
+
+print("=== CloudHV Diagnostic ===");
+
+// Dependency check
+let chs = which("cloud-hypervisor-static");
+let chrs = which("ch-remote-static");
+let ch_missing = (chs == () || chs == "");
+let chr_missing = (chrs == () || chrs == "");
+if ch_missing || chr_missing {
+    print("cloud-hypervisor-static and/or ch-remote-static not available - aborting.");
+    exit();
+}
+
+// Inputs
+let firmware_path = "/tmp/virt_images/hypervisor-fw";
+let disk_path = "/tmp/virt_images/noble-server-cloudimg-amd64.img";
+
+if !exist(firmware_path) {
+    print(`Firmware not found: ${firmware_path}`);
+    exit();
+}
+if !exist(disk_path) {
+    print(`Disk image not found: ${disk_path}`);
+    exit();
+}
+
+// Unique ID
+let rid = run_silent("date +%s%N");
+let suffix = if rid.success && rid.stdout != "" { rid.stdout.trim() } else { "100000" };
+let vm_id = `diagvm_${suffix}`;
+
+// Socket path will be obtained from VM info (SAL populates spec.api_socket after start)
+
+// Build minimal spec; let SAL decide the api_socket under the VM dir
+let spec = #{
+    "id": vm_id,
+    "disk_path": disk_path,
+    "vcpus": 1,
+    "memory_mb": 512
+};
+spec.firmware_path = firmware_path;
+
+fn pid_alive(p) {
+    if p == () { return false; }
+    // Use /proc to avoid noisy "kill: No such process" messages from kill -0
+    return exist(`/proc/${p}`);
+}
+
+fn tail_log(p, n) {
+    if exist(p) {
+        let r = run_silent(`tail -n ${n} ${p}`);
+        if r.success { print(r.stdout); } else { print(r.stderr); }
+    } else {
+        print(`Log file not found: ${p}`);
+    }
+}
+
+try {
+    print("--- Create VM spec ---");
+    let created = cloudhv_vm_create(spec);
+    print(`created: ${created}`);
+} catch (err) {
+    print(`create failed: ${err}`);
+    exit();
+}
+
+// Read back info to get SAL-resolved log_file path
+let info0 = cloudhv_vm_info(vm_id);
+let log_file = info0.runtime.log_file;
+
+// Rely on SAL to handle socket directory creation and stale-socket cleanup
+
+print("--- Start VM ---");
+try {
+    cloudhv_vm_start(vm_id);
+    print("start invoked");
+} catch (err) {
+    print(`start failed: ${err}`);
+    tail_log(log_file, 200);
+    exit();
+}
+
+// Fetch PID and discover API socket path from updated spec
+let info1 = cloudhv_vm_info(vm_id);
+let pid = info1.runtime.pid;
+let api_sock = info1.spec.api_socket;
+print(`pid=${pid}`);
+print(`api_sock_from_sal=${api_sock}`);
+
+// Wait for socket file
+let sock_ok = false;
+for x in 0..50 {
+    if exist(api_sock) { sock_ok = true; break; }
+    sleep(1);
+}
+print(`api_sock_exists=${sock_ok} path=${api_sock}`);
+
+// Probe ch-remote info
+let info_ok = false;
+let last_err = "";
+if sock_ok {
+    for x in 0..20 {
+        let r = run_silent(`ch-remote-static --api-socket ${api_sock} info`);
+        if r.success {
+            info_ok = true;
+            print("ch-remote info OK");
+            break;
+        } else {
+            last_err = if r.stderr != "" { r.stderr } else { r.stdout };
+            sleep(1);
+        }
+    }
+}
+if !info_ok {
+    print("ch-remote info FAILED");
+    if last_err != "" { print(last_err); }
+    let alive = pid_alive(pid);
+    print(`pid_alive=${alive}`);
+    print("--- Last 200 lines of CH log ---");
+    tail_log(log_file, 200);
+    print("--- End of log ---");
+} else {
+    print("--- Stop via SAL (force) ---");
+    try {
+        cloudhv_vm_stop(vm_id, true);
+        print("SAL stop invoked (force)");
+    } catch (err) {
+        print(`stop failed: ${err}`);
+    }
+    // wait for exit (check original PID)
+    for x in 0..30 {
+        if !pid_alive(pid) { break; }
+        sleep(1);
+    }
+    print(`pid_alive_after_stop=${pid_alive(pid)}`);
+}
+
+print("--- Cleanup ---");
+try {
+    cloudhv_vm_delete(vm_id, false);
+    print("vm deleted");
+} catch (err) {
+    print(`delete failed: ${err}`);
+}
+
+print("=== Diagnostic done ===");