coprocess logs missing from container output

[sourcec0de]

Hey guys, awesome work on container pilot. This is way easier than stuffing supervisor into a container.

I've got an issue where the coprocesses output is not being captured.

Here's my container pilot installation script.

ENV CONTAINERPILOT_VERSION 2.7.0
ENV CONTAINERPILOT file:///etc/containerpilot.json
RUN export CP_SHA1=687f7d83e031be7f497ffa94b234251270aee75b \
    && curl -Lso /tmp/containerpilot.tar.gz \
         "https://github.com/joyent/containerpilot/releases/download/${CONTAINERPILOT_VERSION}/containerpilot-${CONTAINERPILOT_VERSION}.tar.gz" \
    && echo "${CP_SHA1}  /tmp/containerpilot.tar.gz" | sha1sum -c \
    && tar zxf /tmp/containerpilot.tar.gz -C /bin \
    && rm /tmp/containerpilot.tar.gz

Here's my containerpilot.json

{
  "consul": "consul:8500",
  "preStart": "/etc/lifecycle/preStart",
  "coprocesses": [
    {
      "name": "sync-nginx",
      "command": ["python3", "sync-nginx.py"],
      "restarts": "unlimited"
    }
  ]
}

I can see the process is running but the output is missing from the logs.
The process isn't crashing and it's working as expected. Any ideas?

Thanks again.

[tgross]

Are you getting any log output from the container? For example, are you seeing the output of your preStart and/or the main process?

In any event, can you run with debug logging and drop the output here? Add the following section to your config:

  "logging": {
    "level": "DEBUG",
    "format": "default",
    "output": "stdout"
  }

[sourcec0de]

@tgross it looks like the output was just really delayed.

I just opened my laptop again and the output was there. Odd.

[tgross]

That's strange. Can you tell me a bit about where you're deploying this? Is this all in Docker on your laptop or something like Triton?

[sourcec0de]

@tgross

Locally: Docker for mac via docker-compose
Production: I'm on Google Container Engine (GKE) kubernetes.

[tgross]

And you saw this behavior in both environments?

[tgross]

Possibly related: #295

[sourcec0de]

@tgross I did see this issue on both environments.

I'll continue my comments on #295

[tgross]

Added a comment here for this: #295 (comment)

[tgross]

Released in https://github.com/joyent/containerpilot/releases/tag/2.7.1. I'm going to mark this as fixed and close this issue, but feel free to reopen if it looks like we missed something.

[sourcec0de]

@tgross it's resolved.

Thanks for the awesome work.