自动kvm切换设置，Android系统下KVM服务器自动切换器的使用方法详解

在Android系统下，使用KVM服务器自动切换器可简化虚拟机管理。本文详细介绍了自动KVM切换设置方法，包括配置步骤、设置参数和实际操作流程，帮助用户轻松实现虚拟机的自动切换。

KVM（Kernel-based Virtual Machine）是一种开源的虚拟化技术，能够将物理服务器转换为多个虚拟机，提高服务器资源利用率，在服务器运行过程中，可能会出现硬件故障导致KVM虚拟机无法正常运行，为了确保服务器稳定运行，我们需要使用KVM服务器自动切换器，本文将详细介绍如何在Android系统下使用KVM服务器自动切换器。

KVM服务器自动切换器介绍

KVM服务器自动切换器是一种基于脚本和工具的自动切换机制，能够在服务器发生故障时，自动将虚拟机切换到备用服务器，该切换器主要基于以下工具实现：

1、DRBD（Distributed Replicated Block Device）：用于实现数据同步，确保主备服务器数据一致性。

2、Pacemaker：用于实现高可用性，监控服务器状态，并在故障发生时进行自动切换。

3、Corosync：用于实现集群通信，确保集群内各节点信息同步。

安装与配置

1、安装所需软件

在Android设备上，我们需要安装以下软件：

- DRBD：用于实现数据同步

- Pacemaker：用于实现高可用性

- Corosync：用于实现集群通信

2、配置DRBD

（1）在主服务器上，编辑DRBD配置文件/etc/drbd.conf，添加以下内容：

global {
        shared_resource drbd1;
}
resource "drbd1" {
        protocol C;
        on primary {
                local_state "Secondary/Secondary/Primary";
                syncer "Primary/Secondary";
                handlers {
                        out-of-sync primary/secondary {
                                oops;
                        }
                }
        }
        on secondary {
                local_state "Secondary/Secondary/Secondary";
                syncer "Secondary/Secondary";
                handlers {
                        out-of-sync primary/secondary {
                                oops;
                        }
                }
        }
        device /dev/drbd1;
        disk /dev/sdb1;
        meta-disk internal;
}

（2）在备用服务器上，编辑DRBD配置文件/etc/drbd.conf，添加以下内容：

global {
        shared_resource drbd1;
}
resource "drbd1" {
        protocol C;
        on primary {
                local_state "Secondary/Secondary/Secondary";
                syncer "Secondary/Secondary";
                handlers {
                        out-of-sync primary/secondary {
                                oops;
                        }
                }
        }
        on secondary {
                local_state "Secondary/Secondary/Secondary";
                syncer "Secondary/Secondary";
                handlers {
                        out-of-sync primary/secondary {
                                oops;
                        }
                }
        }
        device /dev/drbd1;
        disk /dev/sdb1;
        meta-disk internal;
}

3、配置Pacemaker

（1）在主服务器上，编辑Pacemaker配置文件/etc/pacemaker/pacemaker.conf，添加以下内容：

[config]
no_quorum_on_merge = yes
stonith_on_merge = yes

（2）在备用服务器上，编辑Pacemaker配置文件/etc/pacemaker/pacemaker.conf，添加以下内容：

[config]
no_quorum_on_merge = yes
stonith_on_merge = yes

4、配置Corosync

（1）在主服务器上，编辑Corosync配置文件/etc/corosync/corosync.conf，添加以下内容：

node {
        nodeid = 1;
        host = <主机名>;
        quanum = 2;
        token = 1;
        tms4 = yes;
        tms5 = yes;
        tms6 = yes;
        tms7 = yes;
        tms8 = yes;
        tms9 = yes;
        tms10 = yes;
        tms11 = yes;
        tms12 = yes;
        tms13 = yes;
        tms14 = yes;
        tms15 = yes;
        tms16 = yes;
        tms17 = yes;
        tms18 = yes;
        tms19 = yes;
        tms20 = yes;
        tms21 = yes;
        tms22 = yes;
        tms23 = yes;
        tms24 = yes;
        tms25 = yes;
        tms26 = yes;
        tms27 = yes;
        tms28 = yes;
        tms29 = yes;
        tms30 = yes;
        tms31 = yes;
        tms32 = yes;
        tms33 = yes;
        tms34 = yes;
        tms35 = yes;
        tms36 = yes;
        tms37 = yes;
        tms38 = yes;
        tms39 = yes;
        tms40 = yes;
        tms41 = yes;
        tms42 = yes;
        tms43 = yes;
        tms44 = yes;
        tms45 = yes;
        tms46 = yes;
        tms47 = yes;
        tms48 = yes;
        tms49 = yes;
        tms50 = yes;
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