Serving, containers, and resources · Lesson 14 of 17 · 5 min

Read readiness evidence

Readiness should cover the dependencies needed for useful work. A process can listen on a port while a required index or model remains unavailable.

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learner@clairos:~ $

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Your objectives

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1
Read the case evidence
Read /opt/ai-lab/cases/aiops-serving-resources-014.json. Separate the recorded facts from your assumptions.
Hint & worked example
Readiness should cover the dependencies needed for useful work. A process can listen on a port while a required index or model remains unavailable.
The complete case JSON is read successfully.
```
cat /opt/ai-lab/cases/aiops-serving-resources-014.json
```
Common mistake to avoid: An open port proves every dependency is ready.
2
Isolate the deciding signal
Select the required_index_ready field from the case JSON. What does it establish—and what does it not establish?
Hint & worked example
Keep the service unready until the required index is usable.
A successful JSON query isolates required_index_ready.
```
jq .required_index_ready /opt/ai-lab/cases/aiops-serving-resources-014.json
```
Common mistake to avoid: Using a different case or an unrelated signal as the justification.
3
Record your operational decision
Choose the justified code: hold-readiness, change-without-evidence, or ignore-the-signal. Save that one code followed by a newline in /home/learner/lab/aiops-serving-resources-014-decision.txt.
Hint & worked example
Keep the service unready until the required index is usable.
The decision artifact contains the correct code, not just a matching command in history.
```
printf '%s\n' 'hold-readiness' > /home/learner/lab/aiops-serving-resources-014-decision.txt
```
Common mistake to avoid: An open port proves every dependency is ready.

Understand the pattern

Readiness should cover the dependencies needed for useful work. A process can listen on a port while a required index or model remains unavailable.

Interpret the evidence

Keep the service unready until the required index is usable.

A tempting mistake

An open port proves every dependency is ready.

All names, measurements, prices, versions, and thresholds in this exercise are fictional training data. The evidence supports this bounded scenario, not a claim about a live provider.

Worked example and expected result

$ cat /opt/ai-lab/cases/aiops-serving-resources-014.json

{
  "fixture": "Fictional training data; not a live measurement.",
  "port_open": true,
  "model_loaded": true,
  "required_index_ready": false
}

Exit status: 0. The command completed successfully in the training fixture.

$ jq .required_index_ready /opt/ai-lab/cases/aiops-serving-resources-014.json

false

Exit status: 0. The command completed successfully in the training fixture.

$ printf '%s\n' 'hold-readiness' > /home/learner/lab/aiops-serving-resources-014-decision.txt

(no output; exit 0)

Exit status: 0. The command completed successfully in the training fixture.

Try a variation

Name the assumption that would have to change for “hold-readiness” to stop being the justified action. Do not silently replace missing evidence with a guess.

Explain it

What does the evidence in “Read readiness evidence” justify?Keep the service unready until the required index is usable.An open port proves every dependency is ready.Make the change now and gather the missing evidence afterward.

Apply it elsewhere

A colleague concludes: “An open port proves every dependency is ready.” What should you do?Accept it because the training command completed.Treat this fixture as a live measurement.Reject that conclusion; return to the case evidence and its stated limits.

Keep the momentum.

Complete the lab, then explain and apply the pattern.

Next: Inspect service dependencies Try an incident drill

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Keep learning

Case methodology: evidence, limits, decision