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windows: Fix restarts using the raw_exec driver #5864

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merged 7 commits into from
Jul 2, 2019
Merged

windows: Fix restarts using the raw_exec driver #5864

merged 7 commits into from
Jul 2, 2019

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endocrimes
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@endocrimes endocrimes commented Jun 20, 2019 •
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fixes #5803

This currently uses a personal fork of go-winio to add an api that can safely open multiple listeners for a named pipe.

It fixes local restarts on Windows by:

  • No longer trying to recreate named pipes that already exist
  • Correctly closing connections when stopping a Read

@nickethier
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Instead of repackaging we could use govendor fetch github.com/microsoft/go-winio::github.com/endocrimes/go-winio to keep the same paths. This seems like something we should try and upstream if possible so we don't have to maintain a fork.

notnoop
notnoop suggested changes Jun 27, 2019
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+1 to @nickethier suggestion of govendor fetch origin support, we use in other places and it's handy.

Also, let's add a regression test for this case.

client/logmon/logmon.go Outdated Show resolved Hide resolved
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client/lib/fifo/fifo_unix.go Show resolved Hide resolved
endocrimes and others added 3 commits June 28, 2019 13:41
@endocrimes
logmon: Refactor fifo access for windows safety
efda81c 
On unix platforms, it is safe to re-open fifo's for reading after the
first creation if the file is already a fifo, however this is not
possible on windows where this triggers a permissions error on the
socket path, as you cannot recreate it.

We can't transparently handle this in the CreateAndRead handle, because
the Access Is Denied error is too generic to reliably be an IO error.
Instead, we add an explict API for opening a reader to an existing FIFO,
and check to see if the fifo already exists inside the calling package
(e.g logmon)
@endocrimes
vendor: Use dani fork of go-winio
76f72fe
@endocrimes
fifo: Require that fifos do not exist for create
e6daf3b 
Although this operation is safe on linux, it is not safe on Windows when
using the named pipe interface. To provide a ~reasonable common api
abstraction, here we switch to returning File exists errors on the unix
api.
@endocrimes endocrimes force-pushed the dani/win-pipe-cleaner branch 12 times, most recently from 5ef76e3 to c697df9 Compare June 28, 2019 13:58
@endocrimes endocrimes force-pushed the dani/win-pipe-cleaner branch 2 times, most recently from d36439f to 36bf4df Compare June 28, 2019 14:39
notnoop
notnoop reviewed Jul 1, 2019
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The code lgtm - but I have a question about the lock used in Close.

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notnoop
notnoop approved these changes Jul 1, 2019
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couple of questions but merge away as you see fit.

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@endocrimes endocrimes merged commit 7968f79 into master Jul 2, 2019
@endocrimes endocrimes deleted the dani/win-pipe-cleaner branch July 2, 2019 11:59
@ilyaiqoqo ilyaiqoqo mentioned this pull request Jul 18, 2019
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@shoenig shoenig mentioned this pull request Jan 12, 2022
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Task failing with logmon failed to create fifo for extracting logs
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@endocrimes @nickethier @notnoop @preetapan