openstack的migration配置，迁移配置

#############controller config
apt-get install nfs-kernel-server

vim /etc/default/nfs-kernel-server
        NEED_SVCGSSD =         no

vim /etc/default/nfs-common
        NEED_GSSD=no
        NEED_IDMAPD=yes

vim /etc/exports        
        /var/lib/nova/instances 10.10.10.0/24(rw,sync,fsid=0,no_root_squash,no_subtree_check)

vim /etc/idmapd.conf
        [Mapping]
        Nobody-User = nobody
        Nobody-Group = nogroup

        [Translation]
        Method = nsswitch

/etc/init.d/nfs-kernel-server restart
/etc/init.d/idmapd restart


#############computer config
apt-get install -y nfs-common

vim /etc/default/nfs-common
        NEED_GSSD=no
        NEED_IDMAPD=yes

vim /etc/idmapd.conf
        [Mapping]

        Nobody-User = nobody
        Nobody-Group = nogroup

        [Translation]
        Method = nsswitch

vim /etc/fstab
        #controller static ip:10.10.10.51,对于all-in-one 在控制节点上不需要配置
        10.10.10.51:/var/lib/nova/instances /var/lib/nova/instances nfs defaults 0  0

chmod -R o+x /var/lib/nova/instances/
mount -a -v        
df -h        
        
        
##############Update libvirt configuration        
#Libvirt configuration is adoptable for both of controllernode and computenode1

chown -R root:root /etc/libvirt/qemu /var/lib/libvirt/qemu /var/cache/libvirt/qemu
vim /etc/libvirt/qemu.conf
        user = "root"
        group = "root"

vim /etc/libvirt/libvirtd.conf
        listen_tls = 0
        listen_tcp = 1
        auth_tcp = "none"

#vim /etc/init/libvirt-bin.conf
#        exec /usr/sbin/libvirtd $libvirtd_opts -l

vim /etc/default/libvirt-bin
        libvirtd_opts="-d -l"

/etc/init.d/libvirt-bin restart



##########Nova configuration

vim /etc/nova/nova.conf
#== Live Migration==
live_migration_retry_count=30
live_migration_uri=qemu+tcp://%s/system
live_migration_bandwidth=0
live_migration_flag=VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_LIVE, VIR_MIGRATE_PEER2PEER

service nova-compute restart

nova live-migration 138f8d24-a1c5-4694-bc21-6e5acf6cbb04 master

查看uid和gid
/etc/passwd
/etc/group
查看Nova的uid和gid的命令为：id nova


注意要把nova的uid, gid在4台机器上都改成一样

usermod -u <NEWUID> <LOGIN>   
groupmod -g <NEWGID> <GROUP>
find / -user <OLDUID> -exec chown -h <NEWUID> {} \;
find / -group <OLDGID> -exec chgrp -h <NEWGID> {} \;
usermod -g <NEWGID> <LOGIN>
change nova user: