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Add shim log pipe for log forwarding to the daemon

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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>
This commit is contained in:
Michael Crosby
2018-08-06 13:49:09 -04:00
parent 2783a19b10
commit 6ba4ddfdda
9 changed files with 178 additions and 19 deletions
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7
runtime/v2/README.md
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@@ -157,6 +157,13 @@ If the shim collects Out of Memory events, it SHOULD also publish a `runtime.Tas
If a shim does not or cannot implement an rpc call, it MUST return a `github.com/containerd/containerd/errdefs.ErrNotImplemented` error.
#### Debugging and Shim Logs
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 fields and runtime set.
#### ttrpc
[ttrpc](https://github.com/containerd/ttrpc) is the only currently supported protocol for shims.