Certbot broken again

snap
1 
$ certbot
cannot snap-exec: cannot exec "/snap/certbot/3462/bin/python3": no such file or 
$

 $ /snap/certbot/3462/bin/python3
bash: /snap/certbot/3462/bin/python3: No such file or directory
 $

$ file /snap/certbot/3462/bin/python3
/snap/certbot/3462/bin/python3: symbolic link to `../usr/bin/python3.8'
$

$ file /snap/certbot/3462/bin/../usr/bin/python3.8
/snap/certbot/3462/bin/../usr/bin/python3.8: ELF 64-bit LSB  executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 3.2.0, BuildID[sha1]=6e0f85c38b0dfef9bb6b6ee67f8f7dda5159feb8, stripped
$

$ /snap/certbot/3462/bin/../usr/bin/python3.8
bash: /snap/certbot/3462/bin/../usr/bin/python3.8: No such file or directory
$

Could it be a problem with apparmor?

2

Everytime I’ve seen something like this it was either because of a hw architecture mismatch or a ld/loader issue.

What does the output of ldd /snap/certbot/3462/bin/python3 give?

For what it’s worth, I was not able to reproduce the error on a clean x86_64 VM using that same revision (3462)

3 
$ ldd /snap/certbot/3462/bin/python3
        linux-vdso.so.1 =>  (0x00007ffe7937f000)
        libc.so.6 => /snap/core20/current/lib/x86_64-linux-gnu/libc.so.6 (0x00007f2d8ad47000)
        libpthread.so.0 => /snap/core20/current/lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f2d8acf5000)
        libdl.so.2 => /snap/core20/current/lib/x86_64-linux-gnu/libdl.so.2 (0x00007f2d8ad41000)
        libutil.so.1 => /snap/core20/current/lib/x86_64-linux-gnu/libutil.so.1 (0x00007f2d8ad3b000)
        libm.so.6 => /snap/core20/current/lib/x86_64-linux-gnu/libm.so.6 (0x00007f2d8aba6000)
        libexpat.so.1 => /snap/core20/current/lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f2d8ab78000)
        libz.so.1 => /snap/core20/current/lib/x86_64-linux-gnu/libz.so.1 (0x00007f2d8ab5b000)
        /snap/core20/current/lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x00007f2d8ad18000)
$

Nothing is missing AFAICT. Oh. It seems to work again!

$ certbot 
The following error was encountered:
[Errno 13] Permission denied: '/var/log/letsencrypt/.certbot.lock'
Either run as root, or set --config-dir, --work-dir, and --logs-dir to writeable paths.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /tmp/certbot-log-8b_gvyis/log or re-run Certbot with -v for more details.
$ sudo certbot 
[sudo] password for ychaouche: 
Saving debug log to /var/log/letsencrypt/letsencrypt.log
                                                                                
Which names would you like to activate HTTPS for?                               
We recommend selecting either all domains, or all domains in a VirtualHost/server block.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
1: owncloud.lan                                                                 
2: owncloud.local                                                               
3: pydio.local                                                                  
4: mantis.radioalgerie.dz                                                       
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel): c                      
Please specify --domains, or --installer that will help in domain names autodiscovery, or --cert-name for an existing certificate name.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.
$

Are any changes in snaps, snapd or any part of it tracked anywhere?

4

Yes, changes of the recent days are logged on your machine and you can see them using the snap changes command … for details of a specific change you can then use snap change <ID>

1 Like
5

Thanks @ogra. Does it track only user changes? it seems it doesn’t track changes made by itself. Its help says that by default it searches up to 60 days prior.

10:39:52 ~ -1- $ snap changes
no changes found
10:39:56 ~ -1- $ sudo snap changes
[sudo] password for ychaouche:
no changes found
10:40:00 ~ -1- $ snap help changes
Usage:
  snap changes [changes-OPTIONS] [<snap>]

The changes command displays a summary of system changes performed recently.

[changes command options]
      --abs-time    Display absolute times (in RFC 3339 format). Otherwise, display relative times up to 60 days, then YYYY-MM-DD.
10:44:07 ~ -1- $
6

aaaaaaand it borked again t

$ sudo certbot
[sudo] password for ychaouche:
internal error, please report: running "certbot" failed: cannot find installed snap "certbot" at revision 3462: missing file /snap/certbot/3462/meta/snap.yaml
$