[tarantool-patches] Re: [PATCH] tarantoolctl: return an error on enter to a dead socket.

[Sergey Petrenko]

Hi!

18.07.2018 8:19, Konstantin Osipov пишет:
> * Serge Petrenko <sergepetrenko at tarantool.org> [18/07/16 15:14]:
>
>> Tarantoolctl enter didn't check whether connection to a socket was established
>> if a socket file existed. It just executed a local console.
>> Fix this by adding a check and an error, also add a test case.
>>
>> Closes #3364
>>   extra/dist/tarantoolctl.in         | 19 ++++++++++++-------
>>   test/app-tap/tarantoolctl.test.lua | 29 ++++++++++++++++++++++++++++-
>>   2 files changed, 40 insertions(+), 8 deletions(-)
>>
>> +    local status, err = pcall(function()
>> +        test:test("check error codes in case of enter", function(test_i)
>> +            test_i:plan(6)
>> +            check_ok(test_i, dir, 'enter', 'script', 1, nil, "Can't connect to")
>> +            check_ok(test_i, dir, 'start', 'script', 0)
>> +            os.execute(("kill $(cat %s/script.pid)"):format(dir))
> I don't understand how this works. Simply sending
> SIGTERM to tarantool would should it down gracefully and remove
> the socket. If it doesn't, it's a bug. You should use SIGKILL if
Doing
   tarantoolctl start testctl
   kill (tarantool instance pid)
Leaves the socket intact on my pc.
tarantoolctl stop also first explicitly deletes the socket
file and then sends SIGTERM to the instance.
Don't know if it's ok.

> you wanted to create a dead socket. But then again why do you need
> to start an instance in order to get a dead socket? Can't you make
> it simpler and create a dead socket with fio API?
Do you mean create a file with fio.open(sock, 'O_CREAT')?
It won't be a 'real' socket, but I tried it, and the tests seem to
work.
Because AFAIU there is no way to create a unix socket without
starting to listen on it.
That's what I'm doing now:
         test_i:plan(4)
         check_ok(test_i, dir, 'enter', 'script', 1, nil, "Can't connect 
to")
         local console_sock = 'script.control'
         console_sock = fio.pathjoin(fio.dirname(dir), console_sock)
         fio.open(console_sock, 'O_CREAT')
         check_ok(test_i, dir, 'enter', 'script', 1, nil, "Can't connect 
to")
         fio.unlink(console_sock)