During container startup we end up spending a fair amount of time
encoding/decoding json.
This cuts out some of that since we already have the decoded object in
memory.
The old flow looked like:
1. Start container request
2. Create file
3. Encode container spec to json
4. Write to file
5. Close file
6. Open file
7. Read file
8. Decode container spec
9. Close file
10. Send to containerd.
The new flow cuts out steps 6-9 completely, and with it a lot of time
spent in reflect and file IO.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 8d588d9c5b5cd019e09bcfc4f790eae79405c7b1
Component: engine
Instead of a timeout the context is cancelled on error to ensure
proper cleanup of the associated fifos' goroutines.
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Upstream-commit: c178700a0420118fe7f632af4da1bc43abd3a9bf
Component: engine
Brian Goff
Kenfe-Mickael Laventure
Tonis Tiigi
Amit Krishnan