设置断点追踪entry_point

最新推荐文章于 2023-10-23 19:50:47 发布

smallmeow

最新推荐文章于 2023-10-23 19:50:47 发布

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分类专栏： Scalr 文章标签： scalr pdb

本文链接：https://blog.youkuaiyun.com/small_sjtu/article/details/52169594

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[root@ce66c469-721d-41bf-9f6d-73187d2c6410 log]# ps -ef | grep scal
root      2518     1  0 16:26 ?        00:00:00 /opt/scalarizr/embedded/bin/python /opt/scalarizr/bin/scalr-upd-client --daemonize --pid-file /var/run/scalr-upd-client.pid --log-file /var/log/scal rizr_update.log
root      2596     1  0 16:26 ?        00:00:01 /opt/scalarizr/embedded/bin/python /usr/bin/scalarizr -z -c /etc/scalr
root      2661  2462  0 16:32 pts/0    00:00:00 grep --color=auto scal
[root@ce66c469-721d-41bf-9f6d-73187d2c6410 log]# which scalr-upd-client
/usr/bin/scalr-upd-client
[root@ce66c469-721d-41bf-9f6d-73187d2c6410 log]# vim /usr/bin/scalr-upd-client

vim 打开文件后遇到entry_point 无法继续追踪

#!/opt/scalarizr/embedded/bin/python
# EASY-INSTALL-ENTRY-SCRIPT: 'scalarizr==4.9.2','console_scripts','scalr-upd-client'
__requires__ = 'scalarizr==4.9.2'
import sys
from pkg_resources import load_entry_point

if __name__ == '__main__':
    sys.exit(
        load_entry_point('scalarizr==4.9.2', 'console_scripts', 'scalr-upd-client')()
    )
"/usr/bin/scalr-upd-client" 10L, 344C                         1,1           All

加入断点追踪

if __name__ == '__main__':
    import pdb
    pdb.set_trace()
    load_entry_point('scalarizr==4.9.2', 'console_scripts', 'scalr-upd-client')()

然后运行ps 中的命令去掉deamonize进入调试模式，所有（Pdb）后面的都是需要输入的部分

[root@ce66c469-721d-41bf-9f6d-73187d2c6410 log]# /opt/scalarizr/embedded/bin/python /opt/scalarizr/bin/scalr-upd-client --pid-file /var/run/scalr-upd-client.pid --log-file /var/log/scal rizr_update.log
> /opt/scalarizr/bin/scalr-upd-client(10)<module>()
-> load_entry_point('scalarizr==4.9.2', 'console_scripts', 'scalr-upd-client')()
(Pdb) s
--Call--
> /opt/scalarizr/embedded/lib/python2.7/site-packages/setuptools-18.0.1-py2.7.egg/pkg_resources/__init__.py(556)load_entry_point()
-> def load_entry_point(dist, group, name):
(Pdb) s
> /opt/scalarizr/embedded/lib/python2.7/site-packages/setuptools-18.0.1-py2.7.egg/pkg_resources/__init__.py(558)load_entry_point()
-> return get_distribution(dist).load_entry_point(group, name)
(Pdb) s
--Call--
> /opt/scalarizr/embedded/lib/python2.7/site-packages/setuptools-18.0.1-py2.7.egg/pkg_resources/__init__.py(546)get_distribution()
-> def get_distribution(dist):
(Pdb) r
--Return--
> /opt/scalarizr/embedded/lib/python2.7/site-packages/setuptools-18.0.1-py2.7.egg/pkg_resources/__init__.py(554)get_distribution()->scalariz...y2.7.egg)
-> return dist
(Pdb) p(dist._provider.egg_info)
'/opt/scalarizr/embedded/lib/python2.7/site-packages/scalarizr-4.9.2-py2.7.egg/EGG-INFO'

在过程中返回了dist，然后读取它的egg_info，可以看到所在路径。

[root@314a4202-26e0-4adc-a745-d2e690459a37 ~]# vim /opt/scalarizr/embedded/lib/python2.7/site-packages/scalarizr-4.9.2-py2.7.egg/EGG-INFO/entry_points.txt

vim打开该文件

[console_scripts]
scalarizr = scalarizr.app:main
scalr-upd-client = scalarizr.updclient.app:main
szradm = scalarizr.adm.app:main


~
<calarizr-4.9.2-py2.7.egg/EGG-INFO/entry_points.txt" 5L, 130C 1,1           All

因为要找scalr-upd-client所以去找 scalarizr.updclient.app:main 函数，也在刚才的文件夹下。

[root@314a4202-26e0-4adc-a745-d2e690459a37 ~]# cd /opt/scalarizr/embedded/lib/python2.7/site-packages/scalarizr-4.9.2-py2.7.egg/scalarizr/
[root@314a4202-26e0-4adc-a745-d2e690459a37 scalarizr]# ls
adm          cacert.pem      __init__.pyc  queryenv.pyc  storage2
api          config.py       libs          rpc.py        updclient
app.py       config.pyc      linux         rpc.pyc       util
app.pyc      exceptions.py   messaging     scripts       version
bollard.py   exceptions.pyc  node.py       service.py
bollard.pyc  externals       node.pyc      service.pyc
bus.py       handlers        platform      services
bus.pyc      __init__.py     queryenv.py   storage
[root@314a4202-26e0-4adc-a745-d2e690459a37 scalarizr]# cd updclient
[root@314a4202-26e0-4adc-a745-d2e690459a37 updclient]# ls
api.py   app.py   __init__.py   pkgmgr.py
api.pyc  app.pyc  __init__.pyc  pkgmgr.pyc
[root@314a4202-26e0-4adc-a745-d2e690459a37 updclient]# vim app.py

文件绝对路径为 /opt/scalarizr/embedded/lib/python2.7/site-packages/scalarizr-4.9.2-py2.7.egg/scalarizr/updclient/app.py
用vim打开，找到main函数。

def main():
    if linux.os.windows_family \
            and not ('--make-status-file' in sys.argv or '--get-system-id' in sys.argv):
        win32serviceutil.HandleCommandLine(WindowsService)
    else:
        svs = UpdClient()
        try:
            svs.serve_forever()
        except KeyboardInterrupt:
            pass

    # svs = UpdClient()
    # try:
    #     svs.serve_forever()
    # except KeyboardInterrupt:
    #     svs.stop()