stdout/stderr sync not implemented for gRPC storage plugins

[petermetz]

Requirement - what kind of business use case are you trying to solve?

Need to propagate logs of a storage plugin gRPC server (implemented not in Go) to the OS stdout+stderr so that logs of the storage plugin can be analyzed.

Problem - what in Jaeger blocks you from solving the requirement?

go-plugin doesn't sync stdout/stderr so there's no way to get the logs of the plugin (logging to file is not feasible in the environment)

Proposal - what do you suggest to solve the problem or improve the existing situation?

I'm not a 100% sure how to fix it until go-plugin fixes in on their side, but figured maybe a workaround could be added in Jaeger because the relevant go-plugin issue doesn't seem to be getting a fix anytime soon:

hashicorp/go-plugin#93

Any open questions to address

N/A

[yurishkuro]

I don't think we can build anything special in Jaeger, we're fully delegating to go-plugin to start & manage the child process containing the plugin.

See also hashicorp/go-plugin#113 (comment)

[petermetz]

I don't think we can build anything special in Jaeger, we're fully delegating to go-plugin to start & manage the child process containing the plugin.

See also hashicorp/go-plugin#113 (comment)

@yurishkuro Makes sense.
Now that hashicorp/go-plugin#135 is done, can the go-plugin version used by Jaeger be updated? It's been a while since we spoke about this so apologies if this was already taken care of in one of the releases since February (in which case this issue can be closed)

[yurishkuro]

Jaeger is currently on go-plugin v1.0.1, but hashicorp/go-plugin#135 was released in v1.2, from what I understand. We can try upgrading.

[yurishkuro]

closing as we plan to sunset go-plugin based extensions #4647