如何使用Java更改vmware虚拟机的RAM/CPU？

Question

我的团队负责使用java动态更改vmware VM的设置。我的任务是更改分配给VCenter/VSphere上已创建的vmware虚拟机的可用RAM数量和CPU数量。

如何使用java更改vmware虚拟机的RAM容量或CPU数量？我一直在网上寻找线索，但没有找到太多。

Answer 1

下面是使用vSphere java API使用指定值更改VM和CPU值的示例代码。

输入：：

1. CPU(CPU)-提供CPU计数的数量，它永远不会超过主机支持的CPU数量
   1. 内存(RamMB)-提供以MB为单位的RAM值，它永远不会超过主机分配的最大内存。

注:对于PowerON VM-在修改内存/ CPU之前，必须启用VM Memory热添加和CPU热插拔功能以及VM OS支持。

示例代码:：

  public static void changeVMRAMandCPU(ServiceInstance si, String vmName,
        long ramMB, int numCPUs) {
    String waitStr = null;
    try {
        Folder rootFolder = si.getRootFolder();
        VirtualMachine vm = (VirtualMachine) new InventoryNavigator(
                rootFolder).searchManagedEntity("VirtualMachine", vmName);
        HostSystem hs = new HostSystem(si.getServerConnection(), vm
                .getRuntime().getHost());
        System.out.println("Host Name ::" + hs.getName());
        VirtualMachineConfigSpec vmConfigSpec = new VirtualMachineConfigSpec();
        if (isValidCPUCount(numCPUs, hs)) {
            vmConfigSpec.setNumCPUs(numCPUs);
        } else {
            System.out.println("NotAllowed::Provided cpu count " + numCPUs
                    + " is more then the host --> " + hs.getName()
                    + " cpu count "
                    + hs.getHardware().getCpuInfo().getNumCpuCores());
        }

        if (isValidRam(ramMB, hs)) {
            vmConfigSpec.setMemoryMB(ramMB);
        } else {
            System.out.println("NotAllowed::Provided ram " + ramMB
                    + " is more then the host --> " + hs.getName()
                    + " ram " + hs.getHardware().getMemorySize());
        }
        System.out.println("Before modify VM RAM , CPU ==>"
                + vm.getConfig().getHardware().getMemoryMB() + " MB ,"
                + vm.getConfig().getHardware().getNumCPU() + " CPU,");
        Task task = vm.reconfigVM_Task(vmConfigSpec);
        waitStr = task.waitForTask();
        if (waitStr != null && waitStr.equalsIgnoreCase("success")) {
            vm = (VirtualMachine) new InventoryNavigator(rootFolder)
                    .searchManagedEntity("VirtualMachine", vmName);
            System.out.println("After modify VM RAM , CPU ==>"
                    + vm.getConfig().getHardware().getMemoryMB() + " MB ,"
                    + vm.getConfig().getHardware().getNumCPU() + " CPU,");
        } else {
            System.out.println("Error::VM Reconfig fail...");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public static boolean isValidCPUCount(int cpu, HostSystem hs) {
    int hostCpusCount = hs.getHardware().getCpuInfo().getNumCpuCores();
    if (cpu <= hostCpusCount) {
        return true;
    }
    return false;
}

public static boolean isValidRam(long ram, HostSystem hs) {
    long hostMem = hs.getHardware().getMemorySize() / (1024L * 1024L);
    if (ram < hostMem) {
        return true;
    }
    return false;
}