Can't trace a program running inside docker container by pid or ppid #210
Comments
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@Abeautifulsnow thanks for reporting this. Would you be able to see if Austin 3.5 works by any chance? This might be a regression introduced in 3.6, albeit there doesn't seem to be an indication of this in CI. Many thanks! |
@P403n1x87 No, it still doesn't seem to work after installing version 3.5 as you suggested. The only output was the logo text, then it produced nothing more after. I wait for about 2 minutes and It seems to be stuck in some kind of infinite loop or any other problem. Oh, right, I discover that $ austinp -p 22225
# map: 55d13c0be000-55d13c0bf000 /usr/local/bin/python3.8
# map: 55d13c0bf000-55d13c0c0000 /usr/local/bin/python3.8
# map: 55d13c0c0000-55d13c0c1000 /usr/local/bin/python3.8
# map: 55d13c0c1000-55d13c0c2000 /usr/local/bin/python3.8
# map: 55d13c0c2000-55d13c0c3000 /usr/local/bin/python3.8
# map: 7f01508b3000-7f01508b8000 /usr/local/lib/python3.8/site-packages/pandas/_libs/json.cpython-38-x86_64-linux-gnu.so
# map: 7f01508b8000-7f01508c4000 /usr/local/lib/python3.8/site-packages/pandas/_libs/json.cpython-38-x86_64-linux-gnu.so
# map: 7f01508c4000-7f01508c9000 /usr/local/lib/python3.8/site-packages/pandas/_libs/json.cpython-38-x86_64-linux-gnu.so
# map: 7f01508c9000-7f01508ca000 /usr/local/lib/python3.8/site-packages/pandas/_libs/json.cpython-38-x86_64-linux-gnu.so
# map: 7f01508ca000-7f01508cb000 /usr/local/lib/python3.8/site-packages/pandas/_libs/json.cpython-38-x86_64-linux-gnu.soBut I'm a beginner with this tool, so I don't really understand the relationship between |
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@Abeautifulsnow I'm trying to have a look at possible issues here. I'm testing with the latest docker and Austin and things seem to be working as expected when profiling a process within a container from the host. Could you please clarify your scenario a bit more, please? Are you running Austin within the same container of the running process, or are you also trying to profile from the host? Does Austin work with another Python process (e.g. just the REPL)? Thanks 🙏 |
Yes, # austin -p 9143
...
P9143;T0:9143 170
P9143;T0:9143 170
^C
# duration: 582458
Statistics
⌛ Sampling duration : 0.58 s
⏱️ Frame sampling (min/avg/max) : 8/21/202 μs
🐢 Long sampling rate : 1/3345 (0.03 %) samples took longer than the sampling interval to collect
💀 Error rate : 0/3345 (0.00 %) invalid samples
# austin -w 9143
_ _
__ _ _ _ __| |_(_)_ _
/ _` | || (_-< _| | ' \
\__,_|\_,_/__/\__|_|_||_| 3.6.0 [gcc 9.4.0]
🐍 Python version: 3.8.0
💤 Process 9143 🧵 Thread 0:9143
I am trying to profile from the I also use it to capture other python services running in docker and also output nothing by profile from host. It's really so odd. Do you have any other guesses or thoughts or else you want to know? |
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@Abeautifulsnow many thanks for your help thus far. I have recently merged #217 to improve support for "containerised" processes. Would you be able to compile from sources from the |
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@P403n1x87 Sorry for the late reply. I have compiled it from source and retested it as previously described. Unfortunately, it still does not work well. # git branch
* devel
# ls -l
total 624
-rw-r--r-- 1 root root 21286 Apr 7 08:59 argparse.c
-rw-r--r-- 1 root root 2118 Apr 7 08:59 argparse.h
-rwxr-xr-x 1 root root 59080 Apr 7 09:02 austin
-rw-r--r-- 1 root root 3421 Apr 7 08:59 austin.1
-rw-r--r-- 1 root root 8952 Apr 7 09:02 austin-argparse.o
-rw-r--r-- 1 root root 17272 Apr 7 09:02 austin-austin.o
-rw-r--r-- 1 root root 10728 Apr 7 08:59 austin.c
-rw-r--r-- 1 root root 7536 Apr 7 09:02 austin-cache.o
-rw-r--r-- 1 root root 4104 Apr 7 09:02 austin-error.o
-rw-r--r-- 1 root root 1358 Apr 7 08:59 austin.h
-rw-r--r-- 1 root root 10192 Apr 7 09:02 austin-logging.o
-rw-r--r-- 1 root root 1880 Apr 7 09:02 austin-platform.o
-rw-r--r-- 1 root root 6576 Apr 7 09:02 austin-py_proc_list.o
-rw-r--r-- 1 root root 30728 Apr 7 09:02 austin-py_proc.o
-rw-r--r-- 1 root root 19304 Apr 7 09:02 austin-py_thread.o
-rw-r--r-- 1 root root 8184 Apr 7 09:02 austin-stats.o
-rw-r--r-- 1 root root 1573 Apr 7 08:59 bin.h
-rw-r--r-- 1 root root 13436 Apr 7 08:59 cache.c
-rw-r--r-- 1 root root 12947 Apr 7 08:59 cache.h
-rw-r--r-- 1 root root 1988 Apr 7 08:59 code.h
-rw-r--r-- 1 root root 2961 Apr 7 08:59 error.c
-rw-r--r-- 1 root root 3372 Apr 7 08:59 error.h
-rw-r--r-- 1 root root 6440 Apr 7 08:59 events.h
-rw-r--r-- 1 root root 7165 Apr 7 08:59 frame.h
-rw-r--r-- 1 root root 1278 Apr 7 08:59 heap.h
-rw-r--r-- 1 root root 1637 Apr 7 08:59 hints.h
drwxr-xr-x 2 root root 137 Apr 7 08:59 linux
-rw-r--r-- 1 root root 4638 Apr 7 08:59 logging.c
-rw-r--r-- 1 root root 3916 Apr 7 08:59 logging.h
drwxr-xr-x 2 root root 42 Apr 7 08:59 mac
-rw-r--r-- 1 root root 52326 Apr 7 09:02 Makefile
-rw-r--r-- 1 root root 1810 Apr 7 08:59 Makefile.am
-rw-r--r-- 1 root root 60114 Apr 7 09:01 Makefile.in
-rw-r--r-- 1 root root 7049 Apr 7 08:59 mem.h
-rw-r--r-- 1 root root 4171 Apr 7 08:59 mojo.h
-rw-r--r-- 1 root root 4211 Apr 7 08:59 msg.h
-rw-r--r-- 1 root root 967 Apr 7 08:59 platform.c
-rw-r--r-- 1 root root 2002 Apr 7 08:59 platform.h
-rw-r--r-- 1 root root 37197 Apr 7 08:59 py_proc.c
-rw-r--r-- 1 root root 5227 Apr 7 08:59 py_proc.h
-rw-r--r-- 1 root root 9553 Apr 7 08:59 py_proc_list.c
-rw-r--r-- 1 root root 3299 Apr 7 08:59 py_proc_list.h
-rw-r--r-- 1 root root 4006 Apr 7 08:59 py_string.h
drwxr-xr-x 2 root root 232 Apr 7 08:59 python
-rw-r--r-- 1 root root 31347 Apr 7 08:59 py_thread.c
-rw-r--r-- 1 root root 3165 Apr 7 08:59 py_thread.h
-rw-r--r-- 1 root root 4355 Apr 7 08:59 resources.h
-rw-r--r-- 1 root root 4666 Apr 7 08:59 stack.h
-rw-r--r-- 1 root root 5169 Apr 7 08:59 stats.c
-rw-r--r-- 1 root root 3160 Apr 7 08:59 stats.h
-rw-r--r-- 1 root root 1314 Apr 7 08:59 timer.h
-rw-r--r-- 1 root root 1547 Apr 7 08:59 timing.h
-rw-r--r-- 1 root root 12176 Apr 7 08:59 version.h
drwxr-xr-x 2 root root 42 Apr 7 08:59 win
# ./austin -p 3548 -C
_ _
__ _ _ _ __| |_(_)_ _
/ _` | || (_-< _| | ' \
\__,_|\_,_/__/\__|_|_||_| 3.6.1 [gcc 4.8.5]
Parent process
👽 Not a Python process.
🚼 It looks like you are trying to profile a process that is not a Python
process, and that has not spawned any child Python processes. Make sure that
you are targeting the right application.
🤔I also test it with some services that are not started by uvicorn, they are flask applications that are launched directly through python without using any WSGI or ASGI servers such as uvicorn or others. Furthermore, I execute a single py script(demo.py) in a running container which only print "test" inside |
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@Abeautifulsnow thanks for testing the latest sources. We would have to look at the debug logs to get a better idea of what's going on. Would you perhaps be able to re-compile with debug logging support ( |
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@P403n1x87 Yeah, I can have a try on it. But I use git clone --depth=1 https://github.com/P403n1x87/austin.git && cd austin
autoreconf --install
./configure
make
make installto comile 🤦🏻 because an error occured when I ran this command( |
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@Abeautifulsnow you can use |
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@P403n1x87 ...I have compiled austin with this command, autoreconf --install
./configure --enable-debug-symbols true
make
make installbut nothing is written to # ll /var/log/syslog
-rw-rw-rw- 1 root root 0 Apr 11 17:36 /var/log/syslogAm I using it incorrectly? 🥲 |
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🤔 maybe the |
🤔It's running well. But your In that file, I copy some texts here: Are these logs that you want? |
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Yes that's the expected output. Could you grep by |
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@P403n1x87 emmm. The log outputs I mentioned above is all. The symbol of |
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@Abeautifulsnow I see, it looks like the log level is maybe set to something above info. Would you be able to set the log level to debug, please? 🙏 |
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These logs are above the |
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That's great, thanks a lot. These log lines seem to suggest that:
So either we are inferring the wrong address, or we don't have permissions to read. I'll try to narrow it down to potential issues in the code shortly. |
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Description
Hi, before going further, allow me to clarify that maybe this issue seems to be somewhat similar to(not very sure) - Tracing a program running inside docker container may fail #159. Ahh, I've read all the conversations between yours. You've solved the issue metioned by that author. But my situation is a little different from him.
I also have an application running inside the docker container and want to profile it by pid. Through the
htopandps -efcommand, I record the pid and parent pid. When I use<austin -Cp> or <austin -p> [pip]to display the stack of the frames it fails.Versions
austin: 3.6.0
os:
Additional Information
Based on this minor issue, I switched over to py-spy.
py-spyis worked for me. It can retrieve the information by thepid and parent pid. - For example,py-spy top -p 22227will show:I can't put my finger on what the underlying cause is. If I missed something, please let me know. THX.
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