juju-doctor 0.1

Juju-doctor is a pypi package which helps validate Juju deployments using probes.

juju-doctor

You deploy, we validate, you fix :)

Probes

Run a sample show-unit probe with:

1. On a live model juju show-unit grafana/0 | ./resources/relation_dashboard_uid.py
2. On a file cat resources/show-unit.yaml | ./resources/relation_dashboard_uid.py

Run that same probe with juju-doctor:

1. On a live model

juju-doctor check \
    --probe "file://tests/resources/show-unit/relation_dashboard_uid.py" \
    --model "grafana"

2. On a file

juju-doctor check \
    --probe "file://tests/resources/show-unit/relation_dashboard_uid.py" \
    --show-unit "tests/resources/show-unit/show-unit.yaml"

If you want to see more internals, go to src/main.py and change the log level to INFO

Simplest Probe

#!/usr/bin/env python3

import sys
import yaml

def demo_probe(juju_artifact: dict):
    # Your validation goes here
    failure = "you_choose"
    if failure:
        print("failed", file=sys.stderr)
        exit(1)

if __name__ == "__main__":
    juju_artifact = yaml.safe_load(sys.stdin.read())
    demo_probe(juju_artifact)

Demo juju-doctor commands

juju-doctor check --help

juju-doctor check \
    --probe "github://canonical/grafana-k8s-operator//probes/show-unit/relation_dashboard_uid.py" \
    --model "cos"

juju-doctor check \
    --probe "github://canonical/grafana-k8s-operator//probes/show-unit/relation_dashboard_uid.py" \
    --show-unit "tests/resources/show-unit/show-unit.yaml"

juju-doctor check \
    --probe "file://tests/resources/show-unit/relation_dashboard_uid.py" \
    --show-unit "tests/resources/show-unit/show-unit.yaml"

juju-doctor check \
    --probe "file://tests/resources/status" \
    --status "tests/resources/status/gagent-status.yaml"

juju-doctor check \
    --probe "github://canonical/grafana-agent-operator//probes" \
    --status "tests/resources/status/gagent-status.yaml" \
    --bundle "tests/resources/bundle/gagent-bundle.yaml"

Development

git clone https://github.com/canonical/juju-doctor.git
python3 -m venv venv && source venv/bin/activate
pip install -e juju-doctor
juju-doctor check --help