OpenStack远程调试 - eclipse + pydev （二）

转自http://www.51itong.net/eclipse-pydev-openstack-18635.html

一、安装eclipse、PyDev插件

官方eclipse下载地址：https://www.eclipse.org/downloads/

这里不详细描述了，先装java运行环境，再装eclipse就对了。

安装PyDev插件：打开eclipse --> Help --> Install New Software；详情参考这（http://www.pydev.org/manual_101_install.html）

二、配置Pydev debug

配置debug server信息

三、远程调试OpenStack Nova api（nova stop instance的api调用）

1、确保远程运行nova api服务器有pydevd.py，可以从本地安装eclipse的pydev插件目录下找到（不同环境下目录可能有所不同）

然后拷贝到运行nova api服务器的python路径下

1 ices-MacBook-Air:~ iceyao$ ls -l  /Users/iceyao/.p2/pool/plugins/org.python.pydev_4.5.4.201601292234/pysrc/pydevd.py
2 -rw-r--r--  1 iceyao  staff  60901 Jan 29 20:32 /Users/iceyao/.p2/pool/plugins/org.python.pydev_4.5.4.201601292234/pysrc/pydevd.py

2、其次要保证本地eclipse端也有一份相同代码，如果在不同目录，可以使用修改pydevd_file_utils.py文件来实现

1 # 不同环境下文件位置可能有所不同
2 ices-MacBook-Air:~ iceyao$ ls -l  /Users/iceyao/.p2/pool/plugins/org.python.pydev_4.5.4.201601292234/pysrc/pydevd_file_utils.py
3 -rw-r--r--  1 iceyao  staff  14343 Mar 20 14:50 /Users/iceyao/.p2/pool/plugins/org.python.pydev_4.5.4.201601292234/pysrc/pydevd_file_utils.py
4
5 ices-MacBook-Air:~ iceyao$ vim /Users/iceyao/.p2/pool/plugins/org.python.pydev_4.5.4.201601292234/pysrc/pydevd_file_utils.py # 找到PATHS_FROM_ECLIPSE_TO_PYTHON
6 PATHS_FROM_ECLIPSE_TO_PYTHON = [
7   (r'/opt/stack/a/nova',     # 本地路径
8    r'/opt/stack/nova')       # 远端python process路径
9 ]

导入本地/opt/stack/a/nova项目

File --> Import --> General --> Existing Projects into Workspace

3、远程运行nova api服务器设置断点

本地eclipse机器开启debug监听

登入远程的devstack环境，进入screen，加上--remote_debug-host 172.16.1.10 --remote_debug-port 12306，重新启动服务

172.16.1.10：本地安装eclipse的机器ip

1 stack@yxb-devstack:/opt/devstack$ /usr/local/bin/nova-api  --remote_debug-host 172.16.1.10 --remote_debug-port 12306 & echo $! >/opt/stack/status/stack/n-api.pid; fg || echo "n-api failed to start" | tee "/opt/stack/status/stack/n-api.failure"

1 stack@yxb-devstack:~/nova$ cat nova/cmd/__init__.py   # 上述参数的意义
2 import eventlet
3 from nova import debugger
4 if debugger.enabled():
5     # turn off thread patching to enable the remote debugger
6     eventlet.monkey_patch(os=False, thread=False) # 加上上述debug参数后，自动eventlet关闭多线程，不然会出现无法捕获到断电调试的代码
7 else:
8     eventlet.monkey_patch(os=False)

设置断点

01 stack@yxb-devstack:~/nova$ vim nova/compute/api.py
02    @check_instance_lock
03     @check_instance_host
04     @check_instance_cell
05     @check_instance_state(vm_state=[vm_states.ACTIVE, vm_states.ERROR])
06     def stop(self, context, instance, do_cast=True, clean_shutdown=True):
07         """Stop an instance."""
08         import pydevd;pydevd.settrace(host='172.16.1.10', port=12306, stdoutToServer=True, stderrToServer=True,suspend=True) # 断点处
09         self.force_stop(context, instance, do_cast, clean_shutdown)
10
11 stack@yxb-devstack:~/nova$ nova list
12 +--------------------------------------+------+--------+------------+-------------+--------------------------------+
13 | ID                                   | Name | Status | Task State | Power State | Networks                       |
14 +--------------------------------------+------+--------+------------+-------------+--------------------------------+
15 | c04f9a2f-36b3-4104-8c75-5461491aca97 | test | ACTIVE | -          | Running     | public=2001:db8::3, 172.24.4.3 |
16 +--------------------------------------+------+--------+------------+-------------+--------------------------------+
17 stack@yxb-devstack:~/nova$
18 stack@yxb-devstack:~/nova$ nova stop c04f9a2f-36b3-4104-8c75-5461491aca97   # nova客户端发起请求

本地eclipse机器捕获到，接下来就可以进行调试了

参考链接

http://www.pydev.org/manual_101_install.html （PyDev安装）

http://zhaozhiming.github.io/blog/2014/04/13/python-remote-debug-setting-by-pycharm-and-eclipse-in-ubuntu/

http://blog.csdn.net/tantexian/article/details/47003385

http://blog.csdn.net/quqi99/article/details/18404807

http://yikun.github.io/2016/02/23/%E4%BC%98%E9%9B%85%E5%9C%B0%E8%B0%83%E8%AF%95OpenStack/（PyCharm远程调试OpenStack）