cobbler安装及配置

博主：安安
发布时间：2019 年 01 月 24 日
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分类：系统

## 环境准备
- 操作系统：Centos 7 1810
- 安装方式：YUM
- 配置epel的YUM源

## 安装cobbler
```
yum install cobbler cobbler-web pykickstart httpd dhcp tftp-server
```
启动httpd、tftp、cobblerd服务，并设置为开机启动
```
systemctl start cobblerd
systemctl start httpd
systemctl start tftp
#设置相关服务开机启动
systemctl enable cobblerd
systemctl enable httpd
systemctl enable tftp
systemctl enable rsyncd
```
## 配置cobbler
执行`cobbler check`命令检查cobbler设置

这里可能会报如下错误
```
httpd does not appear to be running and proxying cobbler, or SELinux is in the way. Original traceback:
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cobbler/cli.py", line 251, in check_setup
    s.ping()
  File "/usr/lib64/python2.7/xmlrpclib.py", line 1233, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib64/python2.7/xmlrpclib.py", line 1591, in __request
    verbose=self.__verbose
  File "/usr/lib64/python2.7/xmlrpclib.py", line 1273, in request
    return self.single_request(host, handler, request_body, verbose)
  File "/usr/lib64/python2.7/xmlrpclib.py", line 1321, in single_request
    response.msg,
ProtocolError: <ProtocolError for 127.0.0.1:80/cobbler_api: 503 Service Unavailable>
```
根据提示，可以确定是selinux引起的问题，可以将selinux关掉或者执行如下操作
```
setsebool -P httpd_can_network_connect true
```
这里建议关掉selinux，如果不想关的话，则参考如下链接的设置方法

[https://github.com/cobbler/cobbler/wiki/Selinux](https://github.com/cobbler/cobbler/wiki/Selinux)

再次执行`cobbler check`命令检查，输出信息如下

```
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 : SELinux is enabled. Please review the following wiki page for details on ensuring cobbler works correctly in your SELinux environment:
    https://github.com/cobbler/cobbler/wiki/Selinux
4 : change 'disable' to 'no' in /etc/xinetd.d/tftp
5 : 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.
6 : debmirror package is not installed, it will be required to manage debian deployments and repositories
7 : 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
8 : fencing tools were not found, and are required to use the (optional) power management features. install cman or fence-agents to use them

Restart cobblerd and then run 'cobbler sync' to apply changes.
```

下面我们便依据以上检查出的问题逐项进行修复及配置

1. 修改配置文件`/etc/cobbler/settings` （问题1、2）

```
#更改监听IP。
sed -i 's/server: 127.0.0.1/server: 172.25.68.8/' /etc/cobbler/settings

#next_server，用Cobbler管理DHCP需要修改此项。
sed -i 's/next_server: 127.0.0.1/next_server: 172.25.68.8/' /etc/cobbler/settings

#用Cobbler管理DHCP。
sed -i 's/manage_dhcp: 0/manage_dhcp: 1/' /etc/cobbler/settings

#防止循环装系统。
sed -i 's/pxe_just_once: 0/pxe_just_once: 1/' /etc/cobbler/settings
```

2. 关闭或设置selinux（问题3）

```
#临时关闭selinux
setenforce 0

#永久关闭selinux
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
```
3. 修改tftp相关设置（问题4）
编辑配置文件`/etc/xinetd.d/tftp`，如果里面是`disable=yes`的话，需要修改为`disable=no`

4. 同步cobbler设置（问题5）
执行如下命令，从github上同步cobbler需要用到的一些引导文件及加载项
```
cobbler get-loaders
```
5. 安装debian系统相关支持（问题6）
```
yum -y install debmirror
```

6. 修改默认密码（问题7）
这里设置的密码是使用cobbler默认安装的操作系统的密码，用如下命令生成，其中`random-phrase-here`为干扰码，可以自行设置，`your-password-here`为自己设置的密码，执行完成后，用生成的值将`/etc/cobbler/settings`中`default_password_crypted`的值替换掉即可。
```
openssl passwd -1 -salt 'random-phrase-here' 'your-password-here'"
```

7. 安装fence相关设备支持（问题8）
```
yum -y install fence-agents
```

再次重启cobblerd服务并执行`cobbler check`进行配置项检查

检查还有如下的报错

```
The following are potential configuration items that you may want to fix:

1 : comment out 'dists' on /etc/debmirror.conf for proper debian support
2 : comment out 'arches' on /etc/debmirror.conf for proper debian support

Restart cobblerd and then run 'cobbler sync' to apply changes.
```
解决办法：将`/etc/debmirror.conf`配置文件中包含`@dists`和`@arches`的两行注释掉即可
再次检查已经没有报错

## DHCP的配置
由于上文中已经配置由cobbler管理DHCP，因此，DHCP的配置就应该使用cobbler的模板来生成，我们直接修改`/etc/cobbler/dhcp.template`文件即可，这里需要注意的一点就是DHCP的配置必须要有一段包含本子网的配置，否则DHCP会报错。

新增的网段直接复制`subnet`相关的配置就行

## Cobbler命令行的使用

## Cobbler Web的使用
上文中已经安装过`cobbler-web`了，因此，只要启动httpd服务，cobbler web服务便可以使用了。

新版的cobbler web界面需要用HTTPS来访问，访问地址是`https://ip/cobbler_web`
但是，我们在访问的时候，发现服务器报500错误，经过检查httpd的日志，发现报错如下：

```
[Thu Jan 24 16:01:25.739471 2019] [:error] [pid 5466] [remote 172.25.120.32:96] mod_wsgi (pid=5466): Exception occurred processing WSGI script '/usr/share/cobbler/web/cobbler.wsgi'.
[Thu Jan 24 16:01:25.739567 2019] [:error] [pid 5466] [remote 172.25.120.32:96] Traceback (most recent call last):
[Thu Jan 24 16:01:25.739618 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/share/cobbler/web/cobbler.wsgi", line 26, in application
[Thu Jan 24 16:01:25.739687 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     _application = get_wsgi_application()
[Thu Jan 24 16:01:25.739719 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/lib/python2.7/site-packages/django/core/wsgi.py", line 13, in get_wsgi_application
[Thu Jan 24 16:01:25.739753 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     django.setup(set_prefix=False)
[Thu Jan 24 16:01:25.739768 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/lib/python2.7/site-packages/django/__init__.py", line 22, in setup
[Thu Jan 24 16:01:25.739791 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)
[Thu Jan 24 16:01:25.739804 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/lib/python2.7/site-packages/django/conf/__init__.py", line 56, in __getattr__
[Thu Jan 24 16:01:25.739826 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     self._setup(name)
[Thu Jan 24 16:01:25.739843 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/lib/python2.7/site-packages/django/conf/__init__.py", line 41, in _setup
[Thu Jan 24 16:01:25.739907 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     self._wrapped = Settings(settings_module)
[Thu Jan 24 16:01:25.739933 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/lib/python2.7/site-packages/django/conf/__init__.py", line 110, in __init__
[Thu Jan 24 16:01:25.739955 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     mod = importlib.import_module(self.SETTINGS_MODULE)
[Thu Jan 24 16:01:25.739968 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
[Thu Jan 24 16:01:25.739990 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     __import__(name)
[Thu Jan 24 16:01:25.740032 2019] [:error] [pid 5466] [remote 172.25.120.32:96]   File "/usr/share/cobbler/web/settings.py", line 89, in <module>
[Thu Jan 24 16:01:25.740062 2019] [:error] [pid 5466] [remote 172.25.120.32:96]     from django.conf.global_settings import TEMPLATE_CONTEXT_PROCESSORS
[Thu Jan 24 16:01:25.740298 2019] [:error] [pid 5466] [remote 172.25.120.32:96] ImportError: cannot import name TEMPLATE_CONTEXT_PROCESSORS
```

这个报错是由于centos 7默认安装的python-django版本过高，cobbler还存在一些bug未修复，因此，我们需要将djaogo框架降到低版本。

首先，查询当前系统安装的django版本
```
rpm -qa |grep django
```
然后卸载
```
rpm -e python2-django-1.11.18-1.el7.noarch --nodeps
```
安装较低版本的django
```
yum -y install python2-django16
```
重启httpd服务
```
systemctl restart httpd
```

## 自定义的kickstart文件

最后修改：2019 年 01 月 24 日

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cobbler安装及配置

安安 • 2019 年 01 月 24 日

## 环境准备
- 操作系统：Centos 7 1810
- 安装方式：YUM
- 配置epel的YUM源

[https://github.com/cobbler/cobbler/wiki/Selinux](https://github.com/cobbler/cobbler/wiki/Selinux)

再次执行`cobbler check`命令检查，输出信息如下

```
The following are potential configuration items that you may want to fix:

Restart cobblerd and then run 'cobbler sync' to apply changes.
```

下面我们便依据以上检查出的问题逐项进行修复及配置

1. 修改配置文件`/etc/cobbler/settings` （问题1、2）

```
#更改监听IP。
sed -i 's/server: 127.0.0.1/server: 172.25.68.8/' /etc/cobbler/settings

#next_server，用Cobbler管理DHCP需要修改此项。
sed -i 's/next_server: 127.0.0.1/next_server: 172.25.68.8/' /etc/cobbler/settings

#用Cobbler管理DHCP。
sed -i 's/manage_dhcp: 0/manage_dhcp: 1/' /etc/cobbler/settings

#防止循环装系统。
sed -i 's/pxe_just_once: 0/pxe_just_once: 1/' /etc/cobbler/settings
```

2. 关闭或设置selinux（问题3）

```
#临时关闭selinux
setenforce 0

7. 安装fence相关设备支持（问题8）
```
yum -y install fence-agents
```

再次重启cobblerd服务并执行`cobbler check`进行配置项检查

检查还有如下的报错

```
The following are potential configuration items that you may want to fix:

1 : comment out 'dists' on /etc/debmirror.conf for proper debian support
2 : comment out 'arches' on /etc/debmirror.conf for proper debian support

新增的网段直接复制`subnet`相关的配置就行

## Cobbler命令行的使用

## Cobbler Web的使用
上文中已经安装过`cobbler-web`了，因此，只要启动httpd服务，cobbler web服务便可以使用了。

这个报错是由于centos 7默认安装的python-django版本过高，cobbler还存在一些bug未修复，因此，我们需要将djaogo框架降到低版本。

## 自定义的kickstart文件

cobbler安装及配置

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cobbler安装及配置

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