vmm: imporve observability to vmm-task & vmm-sandboxer

[Ziy1-Tan]

closes #5

kuasar/vmm/sandbox/src/sandbox.rs

Line 342 in 08cfdc8

async fn append_container(&mut self, id: &str, options: ContainerOption) -> Result<()> {

• Visualize the results:

Main Changes

• : Replace env_logger with crate tracing;
• : Add #[instrument] for Sandbox and Container API;
• : Consume tracing data with the opentelemetry backend (e.g. Jaeger).

Steps

1. Enable tracing feature:

[sandbox]
enable_tracing = false
[hypervisor]
[hypervisor.task]
enable_tracing = false
[hypervisor.virtiofsd]

2. Run the jaeger server:

docker run --rm --name jaeger \
  -p 6831:6831/udp \
  -p 6832:6832/udp \
  -p 5778:5778 \
  -p 16686:16686 \
  -p 4317:4317 \
  -p 4318:4318 \
  -p 14250:14250 \
  -p 14268:14268 \
  -p 14269:14269 \
  -p 9411:9411 \
  jaegertracing/all-in-one

3. Run the Kuasar: https://github.com/kuasar-io/kuasar#quick-start

4. Check the result: visit the web page http://localhost:16686/

[Ziy1-Tan]

cc @Burning1020