fix: docker compose healthcheck broken

[qclaogui]

Starting from 1.7.0, Pyroscope replaces alpine with distroless which will cause docker compose healthcheck to fail
#3437

e.g. :

services:
  pyroscope:
    image: docker.io/grafana/pyroscope:1.7.1

     ...

    healthcheck:
      ## execute the `test` without a shell, use the form: `["CMD", "command", "arg1", "arg2"]`
      test: [ "CMD", "/usr/bin/wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:4040/ready" ]
    ports:
      - "4040:4040"

Solution:

adding busybox wget to the image and use it.

Releates: qclaogui/codelab-monitoring#201

[korniltsev]

One of the points to use distrolless is to reduce "atack surface" / "CVE noise". Adding wget back would be a step back.

Can you try using profilecli ?
maybe profilecli query series could serve your healthcheck ?

Another option could be to bind mount volume with readonly wget into the pyroscope container

 volumes:
      - ./wget:/usr/bin/wget

[korniltsev]

Braindumping other options: Maybe we could add profilecli ready or maybe we can add a flag to canary-exporter to run it once and also check /ready.