完整部署CentOS7.2+OpenStack+kvm 云平台环境（4）--用OZ工具制作openstack镜像

在部署openstack云平台环境的时候，需要上传镜像到glance。

首先下载iso镜像，这里下载了centos6.5镜像，放到/usr/local/src目录下然后用OZ工具制作openstack的镜像

*******************************安装libvirt虚拟机软件**************************************** [root@openstack-server src]# yum install qemu-kvm libvirt libvirt-python libguestfs-tools virt-install [root@openstack-server src]# systemctl enable libvirtd && systemctl start libvirtd ************************************************************************************

[root@openstack-server src]#yum install -y oz libguestfs-tools

[root@openstack-server src]# pwd /usr/local/src [root@openstack-server src]# ll CentOS-6.5-x86_64-bin-DVD1.iso #下载的iso镜像 -rw-r--r--. 1 root root 4467982336 Nov 29 2013 CentOS-6.5-x86_64-bin-DVD1.iso [root@openstack-server src]# cat CentOS6u5-x86_64.tdl #创建tdl 文件 <template> <name>CentOS6u5-x86_64</name> <description>CentOS6u5-x86_64 template</description> <os> <name>CentOS-6</name> <version>5</version> <arch>x86_64</arch> <rootpw>PASSWORD</rootpw> #这个是虚拟机创建好后，root的登陆密码，密码是在这个镜像里定义的！ <install type='iso'> <iso>file:///usr/local/src/CentOS-6.5-x86_64-bin-DVD1.iso</iso> </install> </os> <commands> #centos7系统里没有/boot/grub/grub.conf文件，这块可以不用写，但写了也无妨。这里我是centos7，也写了 <command name='console'> sed -i 's/ rhgb//g' /boot/grub/grub.conf sed -i 's/ quiet//g' /boot/grub/grub.conf sed -i 's/ console=tty0 / serial=tty0 console=ttyS0,115200n8 /g' /boot/grub/grub.conf </command> </commands> </template>

在用OZ工具制作openstack镜像，有报错： [root@openstack-server src]# oz-install -u -d3 CentOS6u5-x86_64.tdl #报错如下： .................. raise oz.OzException.OzException("Could not find a libvirt bridge. Please run 'virsh net-start default' to start the default libvirt network, or see http://github.com/clalancette/oz/wiki/Oz-Network-Configuration for more information") oz.OzException.OzException: Could not find a libvirt bridge. Please run 'virsh net-start default' to start the default libvirt network, or see http://github.com/clalancette/oz/wiki/Oz-Network-Configuration for more information

[root@openstack-server src]# virsh net-start default error: failed to get network 'default' error: Network not found: no network with matching name 'default'

查阅资料，说是因为 default 网络不存在回想了一下，我开始在捣鼓openstack 的时候，可能用命令删除了default，也或许没有启动default网络因为在不同的环境下，default.xml 的存放路径不同，这里笔者以自己的 centos7 为例

[root@openstack-server src]# find / -name "default.xml" /etc/libvirt/qemu/networks/autostart/default.xml /etc/libvirt/qemu/networks/default.xml /usr/share/backgrounds/default.xml /usr/share/libvirt/networks/default.xml [root@openstack-server src]# virsh net-define /usr/share/libvirt/networks/default.xml Network default defined from /usr/share/libvirt/networks/default.xml

[root@openstack-server src]# virsh net-start default Network default started

[root@openstack-server src]# virsh net-list Name State Autostart Persistent ---------------------------------------------------------- default active no yes

[root@openstack-server src]#

然后接着再进行openstack镜像的制作： [root@openstack-server src]# oz-install -u -d3 CentOS6u5-x86_64.tdl libvirt bridge name is virbr0 Libvirt type is kvm Name: CentOS6u5-x86_64, UUID: 0a9b1d18-f517-40ae-9de9-1fd6101878e2 MAC: 52:54:00:fb:0b:c9, distro: CentOS-6 update: 5, arch: x86_64, diskimage: /var/lib/libvirt/images/CentOS6u5-x86_64.dsk nicmodel: virtio, clockoffset: utc mousetype: ps2, disk_bus: virtio, disk_dev: vda icicletmp: /var/lib/oz/icicletmp/CentOS6u5-x86_64, listen_port: 36050 Original ISO path: /var/lib/oz/isos/CentOS-65x86_64-iso.iso Modified ISO cache: /var/lib/oz/isos/CentOS-65x86_64-iso-oz.iso Output ISO path: /var/lib/libvirt/images/CentOS6u5-x86_64-iso-oz.iso ISO content path: /var/lib/oz/isocontent/CentOS6u5-x86_64-iso Checking for guest conflicts with CentOS6u5-x86_64 Generating install media Attempting to get the lock for /var/lib/oz/isos/CentOS-65x86_64-iso.iso Got the lock for /var/lib/oz/isos/CentOS-65x86_64-iso.iso Fetching the original media Fetching the original install media from file:///usr/local/src/CentOS-6.5-x86_64-bin-DVD1.iso 15kB of 4363264kB 10255kB of 4363264kB 20494kB of 4363264kB 30734kB of 4363264kB 40973kB of 4363264kB 51212kB of 4363264kB .................... .................... .................... Cleaning up guestfs handle for CentOS6u5-x86_64 Syncing Unmounting all Libvirt XML was written to CentOS6u5-x86_64Aug_30_2016-13:47:18

注意：镜像制作完默认会存放到/var/lib/libvirt/images/ 目录下，可以在/etc/oz/oz.cfg 配置文件中进行修改路径。

[root@openstack-server src]# cd /var/lib/libvirt/images/ [root@openstack-server images]# pwd /var/lib/libvirt/images [root@openstack-server images]# ll total 1087336 -rw-rw-rw-. 1 root root 10737418240 Aug 30 13:47 CentOS6u5-x86_64.dsk [root@openstack-server images]# virt-sysprep --add CentOS6u5-x86_64.dsk [ 0.0] Examining the guest ... [ 5.0] Performing "abrt-data" ... ........... [ 5.0] Setting a random seed [ 5.0] Performing "lvm-uuids" ...

查看文件信息 [root@openstack-server images]# qemu-img info CentOS6u5-x86_64.dsk image: CentOS6u5-x86_64.dsk file format: raw virtual size: 10G (10737418240 bytes) disk size: 1.0G

上传镜像到 Glance [root@openstack-server images]# glance image-create --name "CentOS-6.5" --file /var/lib/libvirt/images/CentOS6u5-x86_64.dsk --disk-format qcow2 --container-format bare --visibility public --progress [=============================>] 100%

查看镜像 [root@openstack-server images]# glance image-list +--------------------------------------+------------+ | ID | Name | +--------------------------------------+------------+ | 508db9d4-6c9f-459d-8782-065ee8b6f2c2 | CentOS-6.5 | +--------------------------------------+------------+

登陆openstack界面，发现可以查看到上面已经上传到glance里面的镜像。上面使用OZ工具制作的openstack所需要的Centos6/Centos7镜像的默认大小是10G（如下图）。

---------------------------------------------------------------------------------------------------------- 注意：

如果不想用OZ工具制作，可以直接下载centos的qcow2格式镜像

下载地址：http://cloud.centos.org/centos 【有centos6/7的镜像】

比如：下载centos7的qcow2格式镜像 #wget http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2

上传到 galnce #glance image-create --name "CentOS-7-x86_64" --disk-format qcow2 --container-format bare --file CentOS-7-x86_64-GenericCloud.qcow2 --visibility public --progress

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当然，也可以使用OZ工具制作openstack需要的qcow2的Centos7镜像 [root@openstack-server src]# pwd /usr/local/src [root@openstack-server src]# ls CentOS-7-x86_64-DVD-1511.iso CentOS-7-x86_64-DVD-1511.iso [root@openstack-server src]# ls CentOS-7-x86_64.tdl CentOS-7-x86_64.tdl [root@openstack-server src]# cat CentOS-7-x86_64.tdl <template> <name>CentOS-7-x86_64</name> <description>CentOS-7-x86_64 template</description> <os> <name>CentOS-7</name> <version>2</version> <arch>x86_64</arch> <rootpw>PASSWORD</rootpw> <install type='iso'> <iso>file:///usr/local/src/CentOS-7-x86_64-DVD-1511.iso</iso> </install> </os> <commands> <command name='console'> sed -i 's/ rhgb//g' /boot/grub/grub.conf sed -i 's/ quiet//g' /boot/grub/grub.conf sed -i 's/ console=tty0 / serial=tty0 console=ttyS0,115200n8 /g' /boot/grub/grub.conf </command> </commands> </template>

[root@openstack-server src]# oz-install -u -d3 CentOS-7-x86_64.tdl

后面的步骤跟上面制作Centos6.5版本的操作一样

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下面是centos6.8版本镜像制作的tdl文件模板： [root@openstack-server src]# pwd /usr/local/src [root@openstack-server src]# ls CentOS-6.8-x86_64-bin-DVD1.iso CentOS-6.8-x86_64-bin-DVD1.iso

[root@openstack-server src]# cat CentOS6u8-x86_64.tdl <template> <name>CentOS6u8-x86_64</name> <description>CentOS6u8-x86_64 template</description> <os> <name>CentOS-6</name> <version>8</version> <arch>x86_64</arch> <rootpw>PASSWORD</rootpw> <install type='iso'> <iso>file:///usr/local/src/CentOS-6.8-x86_64-bin-DVD1.iso</iso> </install> </os> <commands> <command name='console'> sed -i 's/ rhgb//g' /boot/grub/grub.conf sed -i 's/ quiet//g' /boot/grub/grub.conf sed -i 's/ console=tty0 / serial=tty0 console=ttyS0,115200n8 /g' /boot/grub/grub.conf </command> </commands> </template>

[root@openstack-server src]# oz-install -u -d3 CentOS6u8-x86_64.tdl

后面的步骤跟上面制作Centos6.5版本的操作一样

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下面说下使用OZ工具制作openstack虚拟化环境下的ubuntu版本镜像的过程记录：

下面以ubuntu12.04版本为例，tdl内容参考OZ在github上的模板样式。 https://github.com/rcbops/oz-image-build/tree/master/templates

[root@openstack-server src]# pwd /usr/local/src [root@openstack-server src]# ls ubuntu-12.04-server-amd64.iso ubuntu-12.04-server-amd64.iso

下面ubuntu的tdl模板可直接使用~ [root@openstack-server src]# cat ubuntu-12.04_x86_64.tdl <template> <name>ubuntu-12.04_x86_64</name> <description>Ubuntu 12.04 15GB template</description> <disk> <size>15</size> #镜像大小为15G </disk> <os> <name>Ubuntu</name> <version>12.04</version> <arch>x86_64</arch> <rootpw>ROOT-PW_CHANGE-ME!!!</rootpw> #root账号登录密码 <install type='iso'> <iso>file:///usr/local/src/ubuntu-12.04-server-amd64.iso</iso> </install> </os> <commands> <command name='console'> sed -i 's/splash//g' /etc/default/grub sed -i 's/quiet/console=ttyS0/g' /etc/default/grub /usr/sbin/update-grub </command> <command name='update'> apt-get update apt-get -y upgrade echo "cloud-init cloud-init/datasources string NoCloud, OVF, Ec2" > /tmp/debconf-selections /usr/bin/debconf-set-selections /tmp/debconf-selections rm -f /tmp/debconf-selections apt-get -y install cloud-init apt-get clean /usr/sbin/useradd -m stack echo "stack ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers sed -i 's/^user: ubuntu/user: stack/g' /etc/cloud/cloud.cfg echo -n > /etc/udev/rules.d/70-persistent-net.rules echo -n > /lib/udev/rules.d/75-persistent-net-generator.rules </command> </commands> </template>

[root@openstack-server src]# oz-install -u -d3 ubuntu-12.04_x86_64.tdl ............ ............

Waiting for ubuntu-12.04_x86_64 to finish installing, 1200/1200 Waiting for ubuntu-12.04_x86_64 to finish installing, 1190/1200 Waiting for ubuntu-12.04_x86_64 to finish installing, 1180/1200 Waiting for ubuntu-12.04_x86_64 to finish installing, 1170/1200

............ ............ Unmounting all Libvirt XML was written to ubuntu-12.04_x86_64Oct_31_2016-23:01:36

[root@openstack-server src]# cd /var/lib/oz/isos/ [root@openstack-server isos]# pwd /var/lib/oz/isos [root@openstack-server isos]# ls #发现oz下已经有了ubuntu12.04镜像 Ubuntu12.04x86_64-iso.iso

[root@openstack-server src]# cd /var/lib/libvirt/images/ [root@openstack-server images]# ls ubuntu-12.04_x86_64.dsk [root@openstack-server images]# virt-sysprep --add ubuntu-12.04_x86_64.dsk [ 0.0] Examining the guest ... ........... [ 5.0] Performing "lvm-uuids" .

[root@openstack-server images]# qemu-img info ubuntu-12.04_x86_64.dsk image: ubuntu-12.04_x86_64.dsk file format: raw virtual size: 15G (16106127360 bytes) disk size: 1.3G

[root@linux-node2 images]# glance image-list +--------------------------------------+---------------------+ | ID | Name | +--------------------------------------+---------------------+ | 042073da-e6cb-4b0b-97dd-1d5ef5be236a | ubuntu-12.04 | +--------------------------------------+---------------------+

登录openstack界面，发现上面上传到openstack的ubuntu12.04镜像已经有了，镜像大小为15G。

ubuntu各历史版本镜像下载地址：http://releases.ubuntu.com/

ubuntu版本升级记录，详情参考：http://www.cnblogs.com/kevingrace/p/6084118.html