proposal: daemon process (#769)

Signed-off-by: Keming <kemingyang@tensorchord.ai> Signed-off-by: Keming <kemingyang@tensorchord.ai>
tensorchord · Aug 15, 2022 · 2f82fa5 · 2f82fa5
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+# Daemon Process Support
+
+Author:
+- [kemingy](https://github.com/kemingy/)
+
+
+## Summary
+
+This proposal is designed to support run daemon processes in the `envd` container.
+
+## Motivation
+
+There can be a general solution for several use cases:
+
+1. run a Jupyter notebook service
+2. run a TensorBoard service
+3. run a demo machine learning model serving service
+4. run a metrics exporter
+
+This is related to the following:
+
+* https://github.com/tensorchord/envd/issues/527
+* https://github.com/tensorchord/envd/pull/568
+* https://github.com/tensorchord/envd/pull/708
+* https://github.com/tensorchord/envd/pull/497
+
+## Goals
+
+* able to run multiple daemon processes controlled by `tini`
+
+## API
+
+```python
+runtime.daemon(commands=[
+    "python3 serving.py --port 8080",
+    "watch date > /dev/null"
+])
+```