实验环境：Centos7.7
实验拓扑：
实验目的：完成基于iscsi存储的kvm迁移

三台虚拟机
2台计算节点
1台iscis存储

网络配置：
业务网	192.168.100.0
心跳网	172.16.100.0
存储网	10.1.2.0

一、完成主机名映射

ALL:cat  /etc/hosts
10.1.2.156 iscsiStorage
10.1.2.157 node1
10.1.2.158 node2
192.168.100.157 node1-yw
192.168.100.158 node2-yw
172.16.100.157 node1-xt
172.16.100.158 node2-xt

二、配置yum源

yum配置
[centos]
name=centos
baseurl=file:///opt/centos
enabled=1
gpgcheck=0

三、安装虚拟化软件

yum groups install -y "Virtualization Platform " 
yum groups install -y "Virtualization Hypervisor "
yum groups install -y "Virtualization Tools "
yum groups install -y "Virtualization Client "

SSH互信

ALL: ssh-keygen -t rsa -P ''
ALL: ssh-copy-id -i ~/.ssh/id_rsa.pub root@node1
ALL: ssh-copy-id -i ~/.ssh/id_rsa.pub root@node2
ALL:mkdir /kvm-hosts/

在vmware的虚拟机中安装包

ALL: yum  group install virtualization-client -y
ALL: yum  group install gnome-desktop -y
ALL: yum install -y tigervnc-server tigervnc

ALL: systemctl stop firewalld
ALL: systemctl disable firewalld

群集软件包安装

ALL:yum install bash-completion ntpdate tigervnc-server iscsi-initiator-utils  pacemaker corosync pcs psmisc policycoreutils-python fence-agents-all dlm lvm2-cluster gfs2-utils -y

ALL: systemctl start pcsd
ALL: systemctl enable pcsd
ALL:echo "a" | passwd --stdin hacluster
单(): pcs cluster auth node1 node2 -u hacluster -p a
单(): pcs cluster setup --name kvm-ha-cluster node1 node2
单(): pcs cluster start --all
单(): pcs cluster enable --all

查看iscsi initiator的IQN

ALL:yum install iscsi-initiator-utils 
ALL:vi /etc/iscsi/initiatorname.iscsi 
获得iqn.1994-05.com.redhat:node(x)

四、ISCSI服务器的配置

yum配置
[centos]
name=centos
baseurl=file:///opt/centos
enabled=1
gpgcheck=0

网络配置
10.1.2.156 iscsiStorage
10.1.2.157 node1
10.1.2.158 node2 
systemctl stop firewalld
systemctl disable firewalld

 ***分两个区出来：***
[root@localhost ~]# fdisk -l
   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048    83888127    41943040   83  Linux
/dev/sdb2        83888128    85985279     1048576   83  Linux

配置iscsi

yum install -y targetcli
/targetcli的对应目录下面/
/1、block/
create wang1 dev=/dev/sdb1
create wang2 dev=/dev/sdb2
/2、iscsi/
create iqn.2019-05.wangyu.name:tomstor1
/3、lun/
create /backstores/block/wang1
create /backstores/block/wang2
/4、acl/
create iqn.1994-05.com.redhat:node1
create iqn.1994-05.com.redhat:node2
cd /
/> ls
o- / ............................................................................... [...]
  o- backstores .................................................................... [...]
  | o- block ........................................................ [Storage Objects: 2]
  | | o- caq1 ................................. [/dev/sdb1 (60.0GiB) write-thru activated]
  | | | o- alua ......................................................... [ALUA Groups: 1]
  | | |   o- default_tg_pt_gp ............................. [ALUA state: Active/optimized]
  | | o- caq2 ................................. [/dev/sdb2 (20.0GiB) write-thru activated]
  | |   o- alua ......................................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ............................. [ALUA state: Active/optimized]
  | o- fileio ....................................................... [Storage Objects: 0]
  | o- pscsi ........................................................ [Storage Objects: 0]
  | o- ramdisk ...................................................... [Storage Objects: 0]
  o- iscsi .................................................................. [Targets: 1]
  | o- iqn.2020-05.caq.name:tomstor1 ........................................... [TPGs: 1]
  |   o- tpg1 ..................................................... [no-gen-acls, no-auth]
  |     o- acls ................................................................ [ACLs: 2]
  |     | o- iqn.1994-05.com.redhat:rs1 ................................. [Mapped LUNs: 2]
  |     | | o- mapped_lun0 ........................................ [lun0 block/caq1 (rw)]
  |     | | o- mapped_lun1 ........................................ [lun1 block/caq2 (rw)]
  |     | o- iqn.1994-05.com.redhat:rs2 ................................. [Mapped LUNs: 2]
  |     |   o- mapped_lun0 ........................................ [lun0 block/caq1 (rw)]
  |     |   o- mapped_lun1 ........................................ [lun1 block/caq2 (rw)]
  |     o- luns ................................................................ [LUNs: 2]
  |     | o- lun0 ............................ [block/caq1 (/dev/sdb1) (default_tg_pt_gp)]
  |     | o- lun1 ............................ [block/caq2 (/dev/sdb2) (default_tg_pt_gp)]
  |     o- portals .......................................................... [Portals: 1]
  |       o- 0.0.0.0:3260 ........................................................... [OK]
  o- loopback ............................................................... [Targets: 0]
/> 
saveconfig
exit
systemctl start target
systemctl enable target

五、计算节点配置

ALL: iscsiadm --mode discovery --type sendtargets --portal 10.1.2.156
ALL: iscsiadm -m node -L all
ALL: fdisk -l
单(): ll /dev/disk/by-id/ |grep sd

#找最小(sdb)的wwn那个，做stonith隔离设备（防止脑裂现象）
pcs stonith create scsi-shooter fence_scsi pcmk_host_list="node1 node2" devices="/dev/disk/by-id/wwn-0x6001405a0dbafe526bc4a8484a66475b" meta provides=unfencing
单(): pcs resource create dlm ocf:pacemaker:controld op monitor interval=30s on-fail=fence clone interleave=true ordered=true
ALL:pcs status			#可以在双节点看一下是否成功了
ALL:lvmconf --enable-cluster
ALL:reboot

重启后可以pcs status 看到都启动的状态

 # 向群集中添加资源，clvm，它是群集化的逻辑资源卷管理
单(): pcs resource create clvmd ocf:heartbeat:clvm op monitor interval=30s on-fail=fence clone interleave=true ordered=true
单():pcs constraint order start dlm-clone then clvmd-clone
单():pcs constraint colocation add clvmd-clone with dlm-clone
fdisk /dev/sdc  //分一个区，并指定为8e类型
ALL:partprobe ; multipath -r  
单():pvcreate /dev/sdc1
单():vgcreate vmvg0 /dev/sdc1
//lvcreate -n lvvm0 -l 100%FREE vmvg0
单():lvcreate -n lvvm0 -L 20G vmvg0
单():mkfs.gfs2 -p lock_dlm -j 2 -t kvm-ha-cluster:kvm /dev/vmvg0/lvvm0


#添加gfs2文件系统，能够进行文件锁的管理，不过这是在disk 动态容量调整的支持下，也就是本文上面所添加的CLVM。
单():pcs resource create VMFS Filesystem device="/dev/vmvg0/lvvm0" directory="/kvm-hosts" fstype="gfs2" clone
单():pcs constraint order clvmd-clone then VMFS-clone
单():pcs constraint colocation add VMFS-clone with clvmd-clone
ALL:semanage fcontext -a -t virt_image_t "/kvm-hosts(/.*)?"
ALL:restorecon -R -v /kvm-hosts

六、创建kvm虚拟机进行测试：

qemu-img create -f qcow2 /kvm-hosts/web01.qcow2 10G
virt-install --name web01 --virt-type kvm --ram 1024 --cdrom=/kvm-hosts/CentOS-7-x86_64-Minimal-1810.iso --disk path=/kvm-hosts/web01.qcow2 --network network=default --graphics vnc,listen=0.0.0.0 --noautoconsole --os-type=linux --os-variant=rhel7
将虚拟机的配置文件传过去，然后undefine
virsh migrate web01 qemu+ssh://root@node2/system --live --unsafe --persistent --undefinesource
virsh dumpxml web01 > /kvm-hosts/web01.xml
virsh undefine web01

virsh define /kvm-hosts/web01.xml
pcs resource create web01_res VirtualDomain hypervisor="qemu:///system" config="/kvm-hosts/web01.xml" migration_transport="ssh" meta allow-migrate="true" 
pcs constraint order start VMFS-clone then web01_res
pcs constraint colocation add web01_res with VMFS-clone	

迁移测试

pcs cluster standby node2

迁移成功！