Cobbler安装报错--dhcpd -t failed Exception occured: <class 'cobbler.cexceptions.CX'>

最近想玩一下自动化安装，就研究了一下cobbler，测试环境本来是想用CentOS6.X的，但是后来一想，还是想用CentOS7.X。然后就碰到坑了。

在同步cobbler配置的时候，发现了以下错误：

cobbler  sync

dhcpd -t failed
Exception occured: <class 'cobbler.cexceptions.CX'>
Exception value: 'cobbler trigger failed: cobbler.modules.sync_post_restart_services'
Exception Info:
File "/usr/lib/python2.7/site-packages/cobbler/remote.py", line 82, in run
rc = self._run(self)
File "/usr/lib/python2.7/site-packages/cobbler/remote.py", line 181, in runner
return self.remote.api.sync(self.options.get("verbose",False),logger=self.logger)
File "/usr/lib/python2.7/site-packages/cobbler/api.py", line 763, in sync
return sync.run()
File "/usr/lib/python2.7/site-packages/cobbler/action_sync.py", line 144, in run
utils.run_triggers(self.api, None, "/var/lib/cobbler/triggers/sync/post/*", logger=self.logger)
File "/usr/lib/python2.7/site-packages/cobbler/utils.py", line 928, in run_triggers
raise CX("cobbler trigger failed: %s" % m.__name__)

!!! TASK FAILED !!!

看报错是跟DHCP服务有关系，

查看dhcp的模板：

subnet 192.168.100.0 netmask 255.255.255.0 {
option routers 192.168.100.254;
option domain-name-servers 192.168.100.254;
option subnet-mask 255.255.255.0;
range dynamic-bootp 192.168.1.10 192.168.1.200;
default-lease-time 21600;
max-lease-time 43200;
next-server $next_server;

发现配置有问题，犯这么低级的错误。太狗血了

修改过配置之后，再执行：

发现还是报这个错误。

只好求助Google大神了。

发现竟然是cobbler的Python源码在CentOS7上面有点问题：

cd /usr/lib/python2.7/site-packages/cobbler/modules

cat -n sync_post_restart_services.py

 35                  dhcp_restart_command = "service %s restart" % dhcp_service_name

发现第35行，重启dhcp的命令还是使用的CentOS6的

拷贝出去，修改代码：

cp sync_post_restart_services.py /tmp/

然后备份老的代码：

mv sync_post_restart_services.py{,.ori}

mv sync_post_restart_services.pyc{,.ori}

mv sync_post_restart_services.pyo{,.ori}

然后对拷贝的文件进行修改：

cd /tmp/

vim sync_post_restart_services.py

把 35 行：dhcp_restart_command = "service %s restart" % dhcp_service_name

修改为：dhcp_restart_command = "/usr/bin/systemctl restart %s " % dhcp_service_name

然后编译Python文件

python -m compileall  sync_post_restart_services.py

python -O -m compileall  sync_post_restart_services.py

把编译后的文件拷贝回原目录：

cp sync_post_restart_services.py*  /usr/lib/python2.7/site-packages/cobbler/modules

最后重启：cobbler

systemctl  restart  cobbler

引用：https://bugzilla.redhat.com/show_bug.cgi?id=709151