Add alias for bcc tools to run in docker container

[aniruddha2000]

Add alias for bcc tools to run in docker container

Added alias for bcc tool packages tcpretrans tcpconnect tcpaccept biolatency ext4slower ext4dist to run necessary debug tools

Testing done

• emerge-amd64-usr app-shells/bash
• Run those alias in the image.

[aniruddha2000]

Still getting error for the alias iovisor-ext4dist

cannot attach kprobe, probe entry may not exist
Traceback (most recent call last):
  File "/usr/share/bcc/tools/ext4dist", line 205, in <module>
    b.attach_kprobe(event="ext4_file_write_iter", fn_name="trace_entry")
  File "/usr/lib/python2.7/dist-packages/bcc/__init__.py", line 834, in attach_kprobe
    (fn_name, event))
Exception: Failed to attach BPF program trace_entry to kprobe ext4_file_write_iter

for alias iovisor-ext4slower

cannot attach kprobe, probe entry may not exist
Traceback (most recent call last):
  File "/usr/share/bcc/tools/ext4slower", line 318, in <module>
    b.attach_kprobe(event="ext4_file_write_iter", fn_name="trace_write_entry")
  File "/usr/lib/python2.7/dist-packages/bcc/__init__.py", line 834, in attach_kprobe
    (fn_name, event))
Exception: Failed to attach BPF program trace_write_entry to kprobe ext4_file_write_iter

[aniruddha2000]

@pothos would you like to build an image and test it :)

[pothos]

Thanks!
I started a build to verify that the alias gets set as expected (will paste the image url for build 3597 here). For testing it's enough to run the lines on a shell in the current Stable or Alpha image. I would exclude non-working commands until we get them working.

[aniruddha2000]

@pothos then after your build if those commands are also not working then would you like me to remove those aliases?

[pothos]

In general setting up the alias works well, but not for the root user which has no .bashrc file. I think it's ok to add one but for now using only core should also be good.

Yes, please remove the two aliases that don't work.

[aniruddha2000]

In general do we have any specific implementation of the root .bashrc or if we are going for that then we have to implement our own from scratch?

[pothos]

Thanks, there is nothing set up for the root bashrc but I see no problem in adding it (edit: I mean, using the same as for the regular user)