Cobbler 无人值守安装Linux


1.Cobbler介绍

Cobbler是一个快速网络安装linux的服务，而且在经过调整也可以支持网络安装windows。该工具使用python开发，小巧轻便（才15k行代码），使用简单的命令即可完成PXE网络安装环境的配置，同时还可以管理DHCP，DNS，以及yum包镜像。

Cobbler支持命令行管理，web界面管理，还提供了API接口，可以方便二次开发使用。

cobbler_1

和Kickstart不同的是，使用cobbler不会因为在局域网中启动了dhcp而导致有些机器因为默认从pxe启动在重启服务器后加载tftp内容导致启动终止。

2.开始安装cobbler

注：默认的CentOS6没有cobbler包，需要到其它镜像去下载

wget http://download.Fedora.RedHat.com/pub/epel/6/i386/epel-release-xx..noarch.rpm

epel-release-xx..noarch.rpm 下载对应的系统包，centos6 对应的是 epel-release-6-5.noarch.rpm

rpm –Uvh epel-release-6-5.noarch.rpm

yum install cobbler cobbler-web tftp rsync httpd dhcp xinetd

3.开始配置

#service httpd start

#service cobblerd start

#cobbler check

The following are potential configuration items that you may want to fix: 1 : The 'server' field in /etc/cobbler/settings must be set to something other than localhost,or kickstarting features will not work. This should be a resolvable hostname or IP for the boot server as reachable by all machines that will use it. 2 : For PXE to be functional, the 'next_server' field in /etc/cobbler/settings must be set to something other than 127.0.0.1, and should match the IP of the boot server on the PXE network. 3 : you need to set some SELinux content rules to ensure cobbler works correctly in your SELinux environment, run the following: /usr/sbin/semanage fcontext -a -t public_content_t "/tftpboot/.*" && \ /usr/sbin/semanage fcontext -a -t public_content_t "/var/www/cobbler/images/.*" 4 : some network boot-loaders are missing from /var/lib/cobbler/loaders, you may run 'cobbler get-loaders' to download them, or, if you only want to handle x86/x86_64 netbooting, you may ensure that you have installed a *recent* version of the syslinux package installed and can ignore this message entirely. Files in this directory, should you want to support all architectures, should include pxelinux.0, menu.c32, elilo.efi, and yaboot.The 'cobbler get-loaders' command is the easiest way to resolve these requirements. 5 : change 'disable' to 'no' in /etc/xinetd.d/tftp 6 : change 'disable' to 'no' in /etc/xinetd.d/rsync 7 : since iptables may be running, ensure 69, 80, and 25151 are unblocked 8 : debmirror package is not installed, it will be required to manage debian deployments and repositories 9 : The default password used by the sample templates for newly installed machines (default_password_crypted in /etc/cobbler/settings) is still set to 'cobbler' and should be changed, try: "openssl passwd -1 -salt 'random-phrase-here' 'your-password-here'" to generate new one Restart cobblerd and then run 'cobbler sync' to apply changes.

上面这段信息大意就是：

1. 编辑/etc/cobbler/settings文件，找到 server选项，修改为适当的ip地址，本实例配置ip为：192.168.1.13(这个根据自己的可以设置);

2. 编辑/etc/cobbler/settings文件，找到 next_server选项，修改为适当的ip地址，本实例配置ip为：192.168.1.13;

3. SELinux的设置。如果上面已经关闭了SELinux就不用管了;

4. 执行 cobbler get-loaders，系统将自动下载loader程序，完成提示4的修复工作;

5. 编辑/etc/xinetd.d/tftp文件，将文件中的disable字段的配置由yes改为no;

6. 编辑/etc/xinetd.d/rsync文件，将文件中的disable字段的配置由yes改为no;

7. 在iptables中将69，80，25151端口打开。如果仅仅只是在内部环境中使用，建议直接将防火墙关掉;

8. 提示说debmirror没安装。如果不是安装 debian之类的系统，此提示可以忽略，如果需要安装，下载地址为;

http://rpmfind.net/linux/rpm2html/search.php?query=debmirror

CentOS 6使用RHEL 5的包就可以。

9. 修改cobbler用户的默认密码，可以使用如下命令生成密码，并使用生成后的密码替换/etc/cobbler/settings中的密码。生成密码命令：

openssl passwd -1 -salt 'random-phrase-here' 'your-password-here' 其中“random-phrase-here”为干扰码 (默认的用户名和密码都是cobbler);

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