CloudStack下无法动态调整内存大小, 需要关机, 应用新的服务方案再开机才行.
On Mon, May 20, 2013 at 5:56 PM, Ningning Li <liningn...@wandoujia.com>wrote: > 好的，多谢。 > > 我用的是centos 6.3，现在有很多KVM虚拟机在线上用，之前没有考虑过动态调整 硬盘和网卡等。 > > 请问 如何 动态调整cpu核数和内存大小呢 :) > > > > > > 2013/5/20 Gavin Lee <gavin....@gmail.com> > > > 经常这样操作, 你可以先在新建一个Volume, 然后Attach到已运行的VM上. 再通过lvextend的相关命令扩充即可. > 不需要关机就可操作. > > > > 不知你OS是什么发行版, 在Redhat/CentOS下, 假设之前有一个20G的盘, 要再扩充40G的空间, > > 可以新添加了一个卷(/dev/sdb), 具体命令及步骤: > > > > 1. Add new physical disk. Boot. > > > > 2. # pvscan > > > > This will show you the current physical volumes. > > > > 3. # fdisk /dev/sdb > > > > Add the disk to your machine as a primary partition. Partition type: “8e > > (LVM)”. Obviously /dev/sdb may be different on your system. > > > > 4. # pvcreate /dev/sdb1 > > > > This creates a new physical LVM volume on our new disk. > > > > 5. # vgextend VolGroup00 /dev/sdb1 > > > > Add our new physical volume to the volume group: VolGroup00. Again, this > > group name may by different for you, but this is what Redhat & CentOS > > assigns by default when you install your system. > > > > 6. # pvscan > > > > You should see the new physical volume assigned to VolGroup00. > > > > 7. # lvextend -L+40G /dev/VolGroup00/LogVol00 > > > > This increases the size of the logical volume our root partition resides > > in. Change the -L flag as appropriate. > > > > We’ve just added 40GB to the logical volume used by the root partition. > > Sweet as. Now we need to resize the file system to utilize the additional > > space. > > > > 8. Reboot into rescue mode using your CentOS CDROM. > > > > From memory this involves typing linux rescue as your boot option. > > > > 9. When prompted, skip the mounting of system partitions. > > > > 10. # lvm vgchange -a y > > > > This command makes your LVM volumes accessible. > > > > 11. # e2fsck -f /dev/VolGroup00/LogVol00 > > > > Run a file system check, the -f flag seems necessary. No idea what we do > if > > the returns an error? > > > > 12. # resize2fs /dev/VolGroup00/LogVol00 > > > > Without any parameters resize2fs will just increase the file system to > the > > max space available. > > > > > > 需要注意的是, 这个附加的盘不要再从这个VM上Dettach > > > > > > > > 2013/5/20 Ningning Li <liningn...@wandoujia.com> > > > > > 用的lvm的存储池，虚拟机的数据盘是一个单独的卷，现在想增加虚拟机数据盘大小，请问怎么增加呢？可以不停机么？ > > > > > > > > > > > > -- > > > Ningning Li > > > sa | Wandou Labs > > > qq 468032221 > > > tel 186 1220 6308 > > > > > > > > > > > -- > > Gavin > > > > > > -- > Ningning Li > sa | Wandou Labs > qq 468032221 > tel 186 1220 6308 > -- Gavin
