First Chapter

GitBook allows you to organize your book into chapters, each chapter is stored in a separate file like this one.

按照之前老的配置，我们都是一个raw image作为base image，然后创建qcow2作为写层。pv作为kvm的storage pool。

一： Base Image

[root@idc02-dockerzone-10112314 images]# file centos6-base

centos6-base: x86 boot sector; GRand Unified Bootloader, stage1 version 0x3, stage2 address 0x2000, stage2 segment 0x200, GRUB version 0.94; partition 1: ID=0x83, starthead 1, startsector 63, 41929587 sectors, code offset 0x48

[root@idc02-dockerzone-10112314 images]# qemu-img info centos6-base

image: centos6-base

file format: raw

virtual size: 20G (21474836480 bytes)

disk size: 20G

centos6-base作为raw格式作为一个base image。

二：Copy On Write

[root@idc02-dockerzone-10112314 os]# file 10_1_123_158

10_1_123_158: QEMU QCOW Image (v3), has backing file (path /var/lib/libvirt//images/centos6-base), 21474836480 bytes

[root@idc02-dockerzone-10112314 os]# qemu-img info 10_1_123_158

image: 10_1_123_158

file format: qcow2

virtual size: 20G (21474836480 bytes)

disk size: 1.1G

cluster_size: 65536

backing file: /var/lib/libvirt//images/centos6-base

Format specific information:

compat: 1.1

lazy refcounts: false

三：Storage Pool

[root@idc02-dockerzone-10112314 os]# virsh pool-list --all

Name State Autostart

-------------------------------------------

ceph-kvm-pool active yes

kvm active yes

[root@idc02-dockerzone-10112314 os]# virsh vol-list kvm

Name Path

------------------------------------------------------------------------------

10.1.123.158 /dev/kvmpool/10.1.123.158

1_1_1_1 /dev/kvmpool/1_1_1_1

上面存储的一个特定都是基于主机自身的存储模式，这种存储模式基本决定了我们没法充分利用各个物理机的就算资源。

四：Current Configuration

目前准备docker／KVM和ceph集群混合部署：

（1）一个机柜就是一个ceph集群，单机是ssd＋sas

（2）一个机柜就是一个KVM/docker资源池

（3）双万兆网卡、双千兆网卡；万兆网卡配置bond4上联到同一个机柜的TOR交换机之上，使用非业务网段IP地址；双千兆网卡bond4上联到TOR交换机作为业务口