Before this change, the v2 runtime shim setup code was hardcoded to always
configure logrus to write logs to the "log" FIFO present in the current working
directory. This only happens in the "default" action codepath
(i.e. not shim start or shim delete).
This is problematic for shims that execute outside the current working
directory of a bundle. For example, it often doesn't make sense for shims that
manage multiple containers to execute in a single bundle directory. Additionally,
shim processes that require being pre-created, i.e. spun up before tasks they
will handle are actually created, won't have a log FIFO to write to until a task
is created.
This change leaves the default behavior as is but introduces a Binary Config
field that will optionally disable automatic configuration of logrus to use the
"log" FIFO. This allows shims to configure their own logger if necessary while
still re-using the rest of the shim helper code in containerd.
Signed-off-by: Erik Sipsma <sipsma@amazon.com>
Shims no longer call `os.Exit` but close the context on shutdown so that
events and other resources have hit the `defer`s.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Use sha256 hash to shorten the unix socket path to satisfy the
length limitation of abstract socket path
This commit also backports the feature storing address path to
a file from v2 to keep compatibility
Fixes#3032
Signed-off-by: Eric Lin <linxiulei@gmail.com>
Use full name including extension for shim binary format on Windows in order to
match any stat path faster without a fallback.
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
megacheck, gosimple and unused has been deprecated and subsumed by
staticcheck. And staticcheck also has been upgraded. we need to update
code for the linter issue.
close: #2945
Signed-off-by: Wei Fu <fuweid89@gmail.com>
This brings freebsd in line with Darwin, ie it builds, but some parts may not yet
be fully functional. There is now a WIP `runc` port for FreeBSD at
https://github.com/clovertrail/runc/tree/1501-SupportOnFreeBSD so should be able
to test further.
Signed-off-by: Justin Cormack <justin@specialbusservice.com>
1. avoid dead lock during kill, fetch allProcesses before handle events
2. use argu's ctx instead of context.Backgroud() in openlog
Signed-off-by: Wei Fu <fuweid89@gmail.com>
Fixes#2709
This increases the buffer size for process exit subscribers. It also
implements a non-blocking send on the subscriber channel. It is better
to drop an exit even than it is to block a shim for one slow subscriber.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
On Windows because of the way the log pipe is forwarded to the shim there is a
condition where the pipe listener may not yet be active when a client tries to
connect. To handle this case we allow polling on the file and rety on pipe not
found. This limits the pipe not found retry to 5 seconds but leaves the connect
timeout alone as if there is a listener we want to connect to it normally.
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Switches the client/server direction of the shim-log pipe on Windows so
that the shim is the listener. This allows the containerd client to
reconnect as needed to the log streams.
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
A fifo on unix or named pipe on Windows will be provided to the shim.
It can be located inside the `cwd` of the shim named "log".
The shims can use the existing `github.com/containerd/containerd/log` package to log debug messages.
Messages will automatically be output in the containerd's daemon logs with the correct fiels and runtime set.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Adds retry support to AnonDialer if the pipe does not exist. This will
retry up to the timeout for the pipe to exist and connect. This solves
the race between the containerd-shim-* start command and the
reinvocation.
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Fixes an issue where the runtime v2 was not using an absolute path to
the executable but setting the .Dir field on the exec.Cmd. This causes
the executable to need to be relative to .Dir but no shim is actually
copied to the bundle directory that its work dir is set to.
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
1. Moves the log message for each socket to the appropriate _unix and
_windows.go
2. Replaces all reference to Abstract Socket for Windows.
3. Adds support for ctrl+c on Windows to exit a shim.
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Since windows does not require a signal handler, we just block on the
channel forever so that it does not exit.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Implements the various requirements for the runtime v2 code to abstract
away the unix/linux code into the appropriate platform level
abstractions to use the runtime v2 on Windows as well.
Adds support in the Makefile.windows to actually build the runtime v2
code for Windows by setting a shell environment BUILD_WINDOWS_V2=1
before calling make. (Note this disables the compilation of the Windows
runtime v1)
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
