Shutdown hcsshim properly #1289
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Currently, Shutdown requests forcefully exits the binary without cleaning up resources and IO channels, or flushing logs. Added `.Done()` and `.IsShutdown()` methods to service watch for service shutdown requests from containerd, and appropriately close background servers and go routines. Added `NewService` method and creation options to properly initialize the `service` struct. Signed-off-by: Hamza El-Saawy <hamzaelsaawy@microsoft.com>
jterry75
reviewed
Feb 2, 2022
jterry75
reviewed
Feb 2, 2022
ttrp.Shutdown( has a 200ms ticker, not a timeout. Adding a proper timeout in case shutdown takes too long. Signed-off-by: Hamza El-Saawy <hamzaelsaawy@microsoft.com>
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dcantah
reviewed
Feb 3, 2022
dcantah
reviewed
Feb 3, 2022
dcantah
reviewed
Feb 3, 2022
dcantah
reviewed
Feb 3, 2022
Checking return value of `shutdownInternal` for cleanup in service tests. Signed-off-by: Hamza El-Saawy <hamzaelsaawy@microsoft.com>
ambarve
reviewed
Feb 3, 2022
ambarve
reviewed
Feb 3, 2022
dcantah
approved these changes
Feb 4, 2022
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Currently, when a
Shutdownrequest is received,servicecallsos.Exitto forcefully exits the binary without cleaning up resources and IO channels, ending spans, or flushing logs. Primarily this prevents logging of shim-wide or long running spans but can also leak un-closed system resources.For reference, the runc shim within containerd does not respect the
ShutdownRequest.Nowparameter, and calls several cleanup callbacks instead of exiting immediately viaos.ExitAdded
.Done()and.IsShutdown()methods toserviceto signal that a service shutdown request from containerd for the init task was received, and updated theserveaction to wait on a shutdown request to close the ttrpc servers and pipes.Added
NewServicemethod and creation options to properly initialize theservicestruct, namely to create the internal channel to signal shutdown.Added tests for
shutdownInternal.Signed-off-by: Hamza El-Saawy hamzaelsaawy@microsoft.com